highaltitude.log.20100515

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[07:34] <G0MJW> What are the transmit details this time and the settings for fldigi?
[07:34] <jcoxon> morning G0MJW
[07:34] <jcoxon> so you'll need to select icarus in dl-fldigi
[07:35] <G0MJW> Good morning James - I forgot where to set it. So long sine last time.
[07:35] <jcoxon> okay so go to the DL-Client menu
[07:35] <G0MJW> It is OK - I have it now.
[07:36] <jcoxon> okay cool
[07:36] <G0MJW> And the web stuff is automatic.
[07:36] <jcoxon> thats the plan at least
[07:36] <jcoxon> :-)
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[07:36] <natrium42> good luck with the launch, gnite
[07:36] <G0MJW> Planned frequency and power - this changes I think.
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[07:37] <Upu> is Robert launching from home ?
[07:37] <jcoxon> yeah, you'll have to set that up yourself
[07:37] <jcoxon> no its from ears - i suspect he was just checking everything worked
[07:37] <G0MJW> 434.750 50mW
[07:37] <Upu> was aout to say I wouldn't want to be collecting the ballon from Olhdam :)
[07:37] <Upu> Oldham
[07:38] <jcoxon> 434.075Mhz 10mW
[07:38] <Upu> Well good luck I'd love to come along but sadly I have the small issue of I'm getting married today :)
[07:38] <jcoxon> i'll clear the tracker near to the launch
[07:38] <jcoxon> Upu, congratulations!
[07:38] <GW8RAK> Morning. seeing that conversation, I was hoping for a northern launch.
[07:38] <jcoxon> yeah that probably trumps a balloon flight
[07:38] <GW8RAK> Upu congratulations.
[07:38] <Upu> CHeers, once I get back I can start some proper work on mine
[07:39] <G0MJW> Just testing!
[07:40] <rjharrison> morning all
[07:41] <Upu> morning
[07:41] <rjharrison> just packing everythihg up
[07:41] <jcoxon> morning rjharrison
[07:41] <jcoxon> email ukhas list!
[07:41] <rjharrison> will be headding off at about 0830 so launch is likely to be more like 12
[07:41] <Upu> remember to turn sleep mode of the camera :)
[07:41] <rjharrison> jcoxon soory not done been bit busy with payload
[07:42] <rjharrison> Upu done
[07:42] <Upu> let me know when the next flight is and i'll come drive/assist
[07:43] <jcoxon> rjharrison, would you like me to do it for you?
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[07:45] <Futurity> Morning
[07:49] <G8TMV> Is the mailing list the Google group? or is there a real list too?
[07:49] <jcoxon> no its the google group
[07:49] <G8TMV> Oh well, I suppose we can't win everything
[07:49] <jcoxon> hehe
[07:50] <jcoxon> its not the best setup but it works, no one really uses it anyway
[07:50] <jcoxon> or you can follow my twitter - i publish the launches there as well
[07:50] <jcoxon> depends which is the best of 2 evils
[08:05] Action: G8TMV doesn't twit either
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[08:46] <fsphil> morning all, any news on Icarus III?
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[09:05] <G8TMV> fsphil, running a bit late
[09:05] <G8TMV> 07:41 < rjharrison> will be headding off at about 0830 so launch is likely to be more like 12
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[09:19] <fsphil> ah
[09:20] <jcoxon> Icarus III has been delay till aprox 13:00 UTC
[09:20] <jcoxon> delayed
[09:20] <jcoxon> but is still going ahead
[09:20] <juxta|console> jcoxon: today that is?
[09:21] <jcoxon> yup
[09:21] <jcoxon> well prob more like 12:00 UTC
[09:21] <LazyLeopard> Ok. That's actually more convenient for me.
[09:21] <LazyLeopard> Ok. So need to keep an eye out here from 12:45ish BST then...
[09:22] <jcoxon> LazyLeopard, yeah
[09:22] <jcoxon> rjh will text me when they are at ears
[09:22] <jcoxon> so will relay the info
[09:22] <jcoxon> also Project Anatole IV should be launching in northern france today
[09:22] <jcoxon> on 2m APRS
[09:22] <jcoxon> might be possible to pick that up
[09:22] <juxta|console> oh great, I should be around at the time :)
[09:24] <G0MJW> Do we have a firm launch time? I have other stuff to schedule today.
[09:24] <LazyLeopard> Hmmm... Only have a vertical for 2m.
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[09:32] <jcoxon> G0MJW, unfortunately not
[09:32] <jcoxon> they've set off from the up north
[09:33] <jcoxon> it'll be around 1 though
[09:33] <jcoxon> shouldn't be later then that
[09:33] <G0MJW> OK - just setting up fldigi as it seems to have got confused. Can you remind me is it 8 bits no parity and 1 stop bit?
[09:34] <jcoxon> ascii-8, no parity and 1.5 stop iirc
[09:34] <LazyLeopard> mental note: signal level increases when antenna is connected to radio...
[09:34] <G0MJW> 1.5 stop bits? OK.
[09:34] <SpeedEvil> :)
[09:34] <chembrow> jcoxon: are you saying the launch will be this afternoon, not this morning?
[09:34] <fsphil> haha
[09:34] <jcoxon> chembrow, yes
[09:34] <fsphil> so does the noise LazyLeopard :p
[09:35] #highaltitude: mode change '+o jcoxon' by ChanServ!ChanServ@services.
[09:35] <LazyLeopard> I thought that repeater was being rather quiet...
[09:35] <LazyLeopard> ;)
[09:35] Topic changed on #highaltitude by jcoxon!jcoxon@host81-159-219-111.range81-159.btcentralplus.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk, wiki.ukhas.org.uk, Icarus III Launch 15/05/10 12:00 UTC EARS, Camb, UK http://spacenear.us/tracker
[09:35] <chembrow> jcoxon: doh! I arranged the morning as play time and the afternoon as family time :(
[09:35] <jcoxon> chembrow, sorry chembrow!
[09:36] <jcoxon> few delays before the launch team set off
[09:36] <chembrow> I suppose they do have a fair trek to the launch site
[09:36] <jcoxon> yeah
[09:37] <fsphil> payload just appeared near Cambridge
[09:38] <jcoxon> i think thats G0MJW testing
[09:38] <jcoxon> will clear it in a second
[09:38] <fsphil> ah
[09:38] <fsphil> thought that was too quick
[09:38] <G0MJW> Yes - your audio test file... Done now and obviously working.
[09:39] <G0MJW> You might want to modify that test file a bit so it does not show up as a real one!
[09:39] <LazyLeopard> The raw log on http://www.robertharrison.org/listen/view.php has quite a bit of old data lurking in it, too...
[09:40] <jcoxon> LazyLeopard, yeah i'm not sure how to do that
[09:40] <jcoxon> i can adjust most things as i have ssh to both robs and natrium's servers
[09:40] <jcoxon> but not sure how to reduce that file length without losing the data for good
[09:41] <G0MJW> The first rule of editing is to make a backup.
[09:41] <fsphil> jcoxon, can you reverse the order of view.php at least?
[09:41] <fsphil> have the most recent at the top
[09:44] <jcoxon> hmmmm hope i haven't broken it!
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[09:47] <fsphil> nah lol
[09:47] <jcoxon> phew it works
[09:47] <jcoxon> okay all clear
[09:50] <jcoxon> okay will bbl (in 2 hrs)
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[10:01] <futurity> morning
[10:01] <futurity> has rharrision posted an update about the delay for today's launch yet?
[10:02] <juxta|console> futurity: looks like 12-1pm
[10:02] <futurity> i know he's on route and i think he'll be at the launch site for around 11-11:30am
[10:02] <futurity> yep
[10:02] <futurity> cool he's updated people, so no need for me to update ;)
[10:03] Action: SpeedEvil presses the button on the antenna tower, and it starts cranking up to its full altitude of 26km.
[10:03] <futurity> juxtalconsole: 12-1pm utc or BST?
[10:04] <juxta|console> utc
[10:06] <futurity> i see so quite late then in the day
[10:06] <futurity> hmm may not be able to make it
[10:06] <futurity> i'll try and juggle some things around
[10:09] <G0MJW> Where are you hoping to sent this? Belgium?
[10:09] <SpeedEvil> Kenya!
[10:09] <G0MJW> Oh - right. (:
[10:10] <SpeedEvil> I think the aim is a nice easy recovery in the UK.
[10:11] <futurity> i think rharrison mentioned it going up fast
[10:12] <russss> right. First step is to find my radio under all this junk on my desk.
[10:12] <futurity> i guess because its going higher, he wants it to get to max altitude asap to avoid a long trip to recover it
[10:13] <G0MJW> Wind is Northwesterly. From Cambridge that will put it in the North Sea, or if lucky perhaps Suffolk, Kent or Essex. I am not sure where the jetstream is likely to take it as it is turning to the North over the launch site http://www.metcheck.com/V40/UK/FREE/jetstream.asp
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[10:15] <russss> http://www.srcf.ucam.org/cuspaceflight/hourly-predictions/
[10:15] <russss> CUSF predictor puts it near Bedford.
[10:15] <russss> the winds work in mysterious ways
[10:16] <G8TMV> that isn't for a Cambridge launch though
[10:16] <russss> yes it is
[10:17] <G8TMV> Huh? that link shows a map with the end near bedford and the start near abbots langly
[10:17] <russss> ah heh
[10:17] <russss> each red dot is a predicted landing spot
[10:18] <russss> click one
[10:18] <russss> and that will show you the path for that prediction
[10:18] <russss> the ones near Bedford are for today, the dots further south are predictions for later on in the week
[10:18] <G8TMV> Oh, what a weird system
[10:18] <russss> as far as I can tell everyone gets confused by that the first time ;)
[10:20] Action: fsphil raises his hand .. yep, confused me first time too
[10:20] <fsphil> I thought someone was launching in the north sea first time I saw it
[10:29] <G0MJW> Strange - mid level winds must be going the other way.
[10:30] <SpeedEvil> It predicts based on hte forecast for all levels at the predicted time
[10:32] <G8TMV> It always seems to have a reversal on ascent and then another on descent, the local winds often the opposite of the high alt ones
[10:33] <SpeedEvil> yep.
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[10:34] <fsphil> hmm.. all predictions from here lead to the irish sea for the next week :) just as well I'm not launching soon
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[10:44] <RocketBoy> EARS live http://www.ustream.tv/channel/xaben
[10:44] <fsphil> looks like fun
[10:45] <RocketBoy> launch later
[10:45] <G8TMV> RocketBoy: Hmm... am I supposed to see live tv on that link?
[10:46] <RocketBoy> yep
[10:46] <G8TMV> well, I don't. but then I'm on a linux box running firefox
[10:46] <fsphil> I can see a field
[10:46] <RocketBoy> :-(
[10:46] <fsphil> you need flash installed
[10:47] <RocketBoy> yep EARS in east anglia
[10:47] <G8TMV> I have flash, but probably not the latest
[10:47] <russss> hmm, there's lots of interesting noises on 434.075 this morning
[10:47] <fsphil> not sure what version I have -- it's the 64-bit version so I'm surprised it works at all
[10:47] <RocketBoy> 6 viewers now
[10:48] <G0MJW> I am interested on how you do that video - for another application. 3G dongle?
[10:48] <fsphil> looks like a really nice day down there
[10:48] <G0MJW> Also - there are lots of noises here on .075. A different frequency would be good in the future.
[10:48] <G0MJW> Lots of help in the feilds.
[10:48] <russss> there are only two frequencies to chose from I think
[10:48] <futurity> is steve there already then i take it?
[10:48] <russss> and the modules are fixed frequency
[10:48] <G8TMV> right windoze laptop now booting
[10:48] <futurity> well he must be becausein the video ;)
[10:49] <jonsowman> interesting field
[10:49] <RocketBoy> yep - i'm here just waiting for rjharrision
[10:49] <futurity> yes, don't recognise the track he's parked on
[10:49] <jonsowman> RocketBoy: cool
[10:49] <RocketBoy> yeah - we wont launch from here
[10:50] <fsphil> is it possible to get the stream url from ustream?
[10:50] <RocketBoy> launch will be where those trees are
[10:51] <russss> it's a bloody pain that fldigi doesn't work on my PC
[10:51] <futurity> RocketBoy: i think rharrison is due to get there around 11:30
[10:51] <russss> maybe I can try and make it work with onboard sound...
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[10:51] <futurity> due to inforced family time, i'll be able to come along for the launch
[10:52] <RocketBoy> ta
[10:52] <RocketBoy> bbl
[10:52] <futurity> get their 30 minutes before launch to video and help out
[10:52] <futurity> but have to bring family as we then need to go onwards for a family day out
[10:52] <futurity> so i can't track unfortunately this time :(
[10:55] <G0MJW> Fixed frequency modules - I am sure they could be tweaked a bit... A GALI-5 modamp on the output would help too - not that I would ever consider doing that myself.
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[10:57] <futurity> Video stream gone
[10:57] <RocketBoy> powering down - saving power and bandwidth 4 the launch
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[10:59] <futurity> cool
[10:59] <fsphil> isn't technology wonderful :)
[11:02] <fsphil> doggie looking walked, brb
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[11:13] <jonsowman> morning jcoxon
[11:14] Action: g3vzv waves at evryone and confirms he is set up to do some tracking later:)
[11:23] <jcoxon> mornig jonsowman
[11:24] <jcoxon> if anyone is running OSX and wants to try the latest version of dl-fldigi get in touch
[11:25] <G8TMV> talking of dl-fldigi if you run it without the -hab option can you make it upload by selecting config options?
[11:26] <DanielRichman> G8TMV, yes
[11:26] <jcoxon> but its not automatic
[11:26] <jcoxon> well less automated then the --hab version
[11:26] <DanielRichman> you need to go to the dl fldigi configure window
[11:26] <DanielRichman> in Misc
[11:26] <jonsowman> jcoxon: would like to try it but I don't have my mac with me this weekend
[11:26] <DanielRichman> or via it's top-bar-menu item
[11:26] <G8TMV> I think I tried that last time and although my location info showed up it didn't actually do any telemetry uploads
[11:27] <jonsowman> will get in touch when I have it again :)
[11:27] <DanielRichman> G8TMV, if you watch the status bar at the bottom after each string it should announce upload success
[11:27] <G8TMV> DanielRichman: yes, it did when run with -hab but not without
[11:27] <G8TMV> I'll play later
[11:28] <DanielRichman> G8TMV, you need to both select the payload in the config menu and check the online box
[11:28] <DanielRichman> and click the autoconfigure button
[11:29] Action: G8TMV nods
[11:30] <G8TMV> Also every time I start it I get a message about "No records in ADIF logbook file" in a dialog which I have to close before the program will start. Is there a way around that?
[11:30] <jcoxon> G8TMV, thats an fldigi thing - we recommend the --hab version really
[11:30] <G8TMV> ok
[11:31] <jcoxon> thats where the new features will be, the non --hab version is really so that you don't need 2 copies of fldigi
[11:31] <jcoxon> when you want to use it normally
[11:33] <G8TMV> I still get that dialog wit h--hab
[11:34] <jcoxon> oh
[11:34] <G8TMV> the reason I didn't want to use --hab is that it doesn't display the rig data
[11:34] <jcoxon> fair enough - the rig data will get intergrated into --hab eventually
[11:34] <jcoxon> i personally use dl-fldigi --hab with flrig seperately
[11:35] <G8TMV> Hmm... thats an idea
[11:35] <russss> what kind of cable do I need to do rig control with the FT-817?
[11:36] <jcoxon> in theory its a serial cable iirc
[11:36] <G8TMV> yes, but a mini-din on the rig end, various people sell them for about a tenner
[11:37] <G8TMV> it has level-shifters built in
[11:37] <jcoxon> i got my from ebay
[11:37] <jcoxon> yeah to usb-serial as well
[11:37] <G8TMV> I went the 9-pin route rather than usb
[11:38] <jcoxon> i'm going to get a signalink for mine though
[11:38] <russss> ah, £8.50 for a USB one
[11:38] <jcoxon> actually more likely this: http://www.g4zlp.co.uk/unified/DM_MiniPRO_complete.shtml
[11:39] <futurity> RocketBoy: do we have an ETA for the launch? Something here has just come up so i may not be able to make it if its a early launch
[11:39] <russss> there is some crazy sounding shit on the radio now
[11:39] <russss> quite musical
[11:40] <m6lep> I've got a usb CAT lead for my FT-817, which sort-of works with dl-fldigi (without --hab) until it tries to upload a line. Then it crashes...
[11:40] <G8TMV> Hmm... I've just appeared on the tracker :)
[11:40] <jcoxon> m6lep, sort of makes sense
[11:41] <jcoxon> we haven't brought out hte rig controls onto the --hab interface
[11:41] <jcoxon> but it might be trying to auto do that (as you configured it in the past with the old version)
[11:42] <G8TMV> Is the re-write (V2?) ready for launch yet?
[11:42] <DanielRichman> m6lep, are you on linux & able to do a backtrace?
[11:43] <jcoxon> G8TMV, pretty much, we were going to bring it up to date with the latest version of fldigi and then some beta testing
[11:43] <futurity> hi, is there an update on the estimated launch time?
[11:43] <jcoxon> e.g. i'm looking for some osx users to test my latest package
[11:43] <jcoxon> futurity, i think its still 13:00 BST
[11:44] <jcoxon> haven't heard otherwise
[11:44] <G8TMV> <g> that's the problem with a fork, keeping them sync'd
[11:44] <m6lep> I've got a cut-n-paste of the last time...
[11:44] <jcoxon> G8TMV, using git does help quite a bit
[11:44] <DanielRichman> m6lep, can I have a look? If I saw it before I can't remember right now
[11:44] <G8TMV> Hmm.. flrig doesn't seem to be packaged for Debian. Is there a Linux version?
[11:45] <jcoxon> G8TMV, http://www.w1hkj.com/download.html
[11:45] <futurity> cool
[11:46] <futurity> thanks for the update
[11:50] <jcoxon> anyone know who SDLR2 might be?
[11:51] <jcoxon> they've got a station setup
[11:51] <jcoxon> but not info about it
[11:53] <LazyLeopard> DanielRichman: http://www.chocky.demon.co.uk/radio/fldigi-crash and fldigi-crash-2
[11:54] <LazyLeopard> ...but they're not (to my eyes) particularly informative...
[11:55] <DanielRichman> LazyLeopard, no they arn't; I meant something produced by gdb
[11:55] <LazyLeopard> ...and I can't remember the exact circumstances of either.
[11:55] <DanielRichman> got a moment?
[11:55] <LazyLeopard> I'll need to get the laptop back next to the radio...
[11:55] <DanielRichman> LazyLeopard, broadly what you need to do is find your fldigi binary
[11:55] <DanielRichman> run
[11:55] <DanielRichman> gdb ./fldigi
[11:55] <DanielRichman> or ./dl-fldigi depending if you've pulled the update that renames it
[11:56] <DanielRichman> then from the gdb> console you type "run"
[11:56] <DanielRichman> and reproduce the crash; at which point fldigi will freeze. Then at gdb> you type
[11:56] <DanielRichman> "bt full"
[11:56] <DanielRichman> and paste the results
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[11:57] <G8TMV> jcoxon: right, I quick build of flrig and it's working - although it does seem to mess with the volume settings when it inits
[11:58] <DanielRichman> LazyLeopard, those two crashes look different though. One of them would at first glance appear to be pulseaudio complaining of lack of memory. You might want to check you don't go OOM also
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[11:59] <jcoxon> G8TMV, i'm not sure why it does that
[11:59] <Laurenceb> hi
[11:59] <jcoxon> hey Laurenceb
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[12:01] <LazyLeopard> Ok, the second one might have been during the last flight, when the system ran out of memory after a while. I suspect there's a memory leak...
[12:01] <LazyLeopard> First one was a rigcat crash.
[12:01] <DanielRichman> ok let's focus on the fisrt
[12:01] <LazyLeopard> However, probably with an older version.
[12:01] <DanielRichman> When I remember & have time I'll run fldigi under valgrind to look for the leak
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[12:04] <m6lep> Ok. Laptop next to radio.
[12:05] <RocketBoy> http://www.ustream.tv/channel/xaben
[12:05] <RocketBoy> on again
[12:05] Action: G8TMV is all set too - with dipole on squidpole out of the window
[12:05] <RocketBoy> bbl
[12:06] Action: m6lep is rebuilding dl-fldigi for testing purposes...
[12:06] <DanielRichman> m6lep, cool
[12:06] <jcoxon> RocketBoy, good stream
[12:07] <RocketBoy> yeah - sunglasses in front of the camera work!
[12:07] <LazyLeopard> Heh ;)
[12:07] <fsphil> back
[12:07] <jcoxon> there is a ustream app for android now
[12:08] <RocketBoy> and the iphone - I may put that on later
[12:08] <fsphil> DanielRichman, m6lep's crash sounds like the one fixed a few weeks back
[12:09] <jonsowman> was it 1300 BST launch we're aiming for?
[12:09] <fsphil> where it tries to update the hab UI even if it's not present
[12:09] <DanielRichman> fsphil, weird. m6lep / LazyLeopard do you have the latest git?
[12:09] <DanielRichman> fsphil, yes
[12:10] <G0MJW> I am back. How is it going?
[12:10] <fsphil> I merged in the last upstream release into my branch ... seems to have messed up the 'Network' page on github
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[12:11] <DanielRichman> heh that page certainly doesn't seem stable
[12:11] <fsphil> yea it's a bit bonkers
[12:11] <m6lep> Not THAT button!
[12:11] <fsphil> neat when it works though
[12:11] <fsphil> lol m6lep, wb
[12:11] <m6lep> I got the version from git last night.
[12:12] <DanielRichman> ok
[12:12] <jcoxon> rob reckons just after 13:00
[12:12] <jcoxon> fsphil, so should i pull you dl-fldigi git?
[12:12] <G0MJW> Right. time for lunch then.
[12:12] <fsphil> jcoxon, yea -- seems to have all worked
[12:12] <fsphil> very few conflicts, mostly trivial stuff
[12:12] <jcoxon> yeah thats what i suspected
[12:13] <jcoxon> okay so now we should roll some binaries
[12:14] <futurity> cool feed
[12:14] <futurity> video feed
[12:14] <futurity> i could even see them answering my phone call ;)
[12:14] <fsphil> haha
[12:15] <G8TMV> looks like they are setting up to have lunch with that table and chairs ;)
[12:15] <sbasuita> who's in the red?
[12:17] <jcoxon> fsphil, hmmm i get a compile error
[12:17] <fsphil> where at?
[12:17] <jcoxon> seems to be in xmlrpc.cxx
[12:17] <fsphil> ah, I didn't compile that -- one sec
[12:17] <fsphil> no wait I did
[12:18] <fsphil> can you paste the error somewhere?
[12:18] <jcoxon> 99
[12:18] <LazyLeopard> Ok, so I'll run that version under gdb and see what happens.
[12:19] <DanielRichman> fsphil, jcoxon, have pulled changes; will try compiling aswell
[12:20] <jcoxon> it could well be somthing on my side
[12:20] <DanielRichman> fsphil, jcoxon, it builds successfully
[12:20] <DanielRichman> jcoxon, git status? git clean -nxd?
[12:21] <jcoxon> hehe make clean seems to have solved it
[12:23] <fsphil> there's a new 'contestia' mode in this version
[12:23] <RocketBoy> going offline agian
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[12:24] <sbasuita> :(
[12:27] <Laurenceb> whos launching?
[12:28] <jcoxon> Laurenceb, rjharrison is with his icarus III payload
[12:29] <LazyLeopard> ...and talking of "musical" weird stuff, anyone listened for the new version of GB3VHF on 144,428,500?
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[12:35] <fsphil> hmm, dl-fldigi is crashing everytime I select audio playback, and browse to my ~/ folder
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[12:37] <fsphil> ah, it's the .gvfs folder blocking
[12:38] <g8khw-iPhone> Gonna try the iphone on ustream - same channel
[12:38] <jcoxon> fsphil, i have issues with playback, well it works on dl-fldigi but it won't exit properly if i play back a file
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[12:38] <jcoxon> have to kill it
[12:39] <fsphil> strange -- I'll see if I can reproduce that later
[12:39] <fsphil> was it in hab mode?
[12:39] <jcoxon> had it for a while to tell the truth - i'm quite sure its a mac thing
[12:40] <jcoxon> fsphil, DanielRichman okay my dl-fldigi github is completely up to date and makes osx bundles with the --hab icon shortcut
[12:40] <fsphil> ustream is back
[12:41] <fsphil> with a very familiar rtty sound in the background
[12:41] <jcoxon> with sound!
[12:41] <G0MJW> Gone.
[12:41] <jonsowman> :(
[12:41] <fsphil> well, it had sound lol
[12:42] <jcoxon> looks like a lovely day to launch
[12:42] <russss> hmm
[12:42] <russss> dl-fldigi is not letting me select a flight xml
[12:43] <fsphil> rebooting, brb
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[12:44] <Laurenceb> good luck rjharrison
[12:46] <jcoxon> russss, new or old dl-fldigi and which OS?
[12:46] <russss> OS X, old one
[12:46] <russss> I might try and get the new one working. I failed last time
[12:46] <jcoxon> oooooo can i give you my new app bundle
[12:46] <russss> I was writing a homebrew recipe for it
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[12:47] <DanielRichman> jcoxon, so we need to fix the resizing, m6lep's bug & then package up for some srs testing?
[12:48] <jcoxon> DanielRichman, agreed
[12:48] <G8TMV> can I also request that you make sure your config.sub and config.guess are up to date - otherwise it makes the packaging for Debian/Ubuntu very painful
[12:49] <jcoxon> though i'm not so sure about m6lep's bug - need to check that it hasn't been fixed already
[12:49] <jcoxon> DanielRichman, i'm not going to be able to fix the resizing issue till 2nd June
[12:49] <fsphil> oh, one point: the fldigi developers didn't update the version number in the last release - it still reporting as the last version
[12:50] <jcoxon> russss, http://github.com/jamescoxon/dl-fldigi/downloads
[12:50] <jcoxon> would be great if you could see if that actually works - especially the dl-fldigiHAB app that should open it in the --hab mode
[12:50] <russss> oh, duh. My wireless was turned off!
[12:50] <russss> I'll try the new one anyway ;)
[12:50] <DanielRichman> G8TMV, will try to remember. Don't worry; we'll release ubuntu/debian packages, windows packages, jcoxon OSX packages and I think fsphil *might* be cooking up a Fedora one
[12:51] <G8TMV> DanielRichman: I'm a DD I can get an official package into Debian
[12:52] <fsphil> yes, I've got a spec file but I'm not a fedora packager, I need to see if I can get the current fldigi packager to add it
[12:52] <DanielRichman> G8TMV, sbasuita will produce a Ubuntu package I am sure. Also, config.{guess,sub} are produced by autoreconf -i, no? which installs the latest versions. Provided the source tar is release from a system with a new autoreconf that should be fine then?
[12:52] <LazyLeopard> I'll run with the latest under gdb and see whether the problem reoccurs...
[12:52] <DanielRichman> LazyLeopard, ok, thank you
[12:52] <G8TMV> DanielRichman: sbasuita doesn't get his packages into Ubuntu, only into the non-official repos
[12:53] <DanielRichman> G8TMV, he never submitted it to revu, I know, but I think he intends to eventually
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[12:54] <G8TMV> It would be better to get it into Debian, then it will follow into Ubuntu automatically. The other way around needs manual work
[12:55] <DanielRichman> that is true.
[12:56] <sbasuita> yep i intend to get it into debian
[12:56] <G8TMV> Actually, if sbasuita generates a Debian package I'll sponsor the upload for him
[12:56] <sbasuita> G8TMV: cheers :)
[12:56] <G8TMV> saves me doing the hard bit ;)
[12:56] <sbasuita> G8TMV: you're Colin right?
[12:56] <DanielRichman> sbasuita, also it looks like it won't have to conflict with fldigi
[12:56] <G8TMV> Yup
[12:56] <DanielRichman> sbasuita, now that it installs under "dl-fldigi"
[12:56] <sbasuita> cool
[12:56] <jcoxon> would we need to do some licencing work
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[12:57] <G8TMV> as long as it's careful about config files
[12:57] <jcoxon> just to make it all happy
[12:57] <DanielRichman> that said jcoxon we ought to fix the flarq binary name
[12:57] <jcoxon> yeah it shares config files
[12:57] <jcoxon> that could be an issue
[12:57] <DanielRichman> well in the home directory it does; are there any system wide ones?
[12:57] <jcoxon> no
[12:57] <DanielRichman> with different versions of fldigi that could be an issue, otherwise...
[12:57] <G8TMV> not a problem as long as you respect an existing file and make sure it doesn't break anything
[12:57] <DanielRichman> hmm actually fldigi would keep removing any saved dl-fldigi values because it dosen't expect anything
[12:58] <jcoxon> yeah
[12:58] <DanielRichman> well we'll have to decide whether to set the conflicts: value later
[12:58] <russss> jcoxon: seems to be working
[12:58] <jcoxon> russss, great
[12:58] <jcoxon> did the applescript work for you?
[12:58] <jcoxon> an now have the fancy --hab interface?
[12:58] <russss> applescript?
[12:59] <jcoxon> did you copy the 3 files to Applications?
[12:59] <russss> yeah I did
[12:59] <jcoxon> then run dl-fldigiHAB
[12:59] <russss> I ran the non-HAB one first
[12:59] <jcoxon> okay
[12:59] <jcoxon> well dl-fldigiHAB is an applescript app to run the binary with --hab
[12:59] <fsphil> can we just disable flarq on the hab package?
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[12:59] <RocketBoy> just filling
[12:59] <fsphil> it's completely unnecessary
[12:59] <jcoxon> fsphil, should be able to - in configure
[13:00] <fsphil> yea
[13:00] <fsphil> have it disabled by default
[13:00] <jcoxon> okay better get setup to track
[13:00] <G8TMV> RocketBoy: video?
[13:01] <RocketBoy> online now
[13:01] <G0MJW> Q1 Monaco
[13:02] <RocketBoy> there is a rocket launch going on here too
[13:02] <RocketBoy> level 3 - M
[13:02] <fsphil> I really wanna see that some day
[13:02] <RocketBoy> will swap video to that when it launches
[13:02] <G0MJW> What happened to the launch rocket from balloon project?
[13:03] <jcoxon> G0MJW, thats still being worked on
[13:03] <G0MJW> Good luck with that.
[13:04] <SpeedEvil> It's rather more involved than 'strap payload to balloon, add helium' though :)
[13:04] <russss> I've got a ton of intereference today
[13:04] <jcoxon> not too bad here
[13:04] <jonsowman> looks like a lovely day over there
[13:04] <fsphil> nice shot
[13:05] <G0MJW> What is the launch location lat/long?
[13:05] <jonsowman> is it EARS?
[13:05] <G8TMV> yes
[13:05] <jonsowman> 52.2511, -0.0927
[13:05] <G0MJW> tnx
[13:06] <jcoxon> LazyLeopard, am on GB3NS
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[13:09] <G0MJW> Loads of interference.
[13:09] <g4ufs> Are we up?
[13:09] <jcoxon> not yet
[13:09] <g4ufs> ty
[13:09] <jcoxon> ping G8DSU
[13:10] <G0MJW> Continuous data transmission on 434.075 around here. Hopefully the payload will overcome it.
[13:10] <G8DSU> Hi jcoxon
[13:10] <jcoxon> G8DSU, was wondering if you were going to add you station lat/lon into dl-fldigi so you can appear on the map (just a rough estimate)
[13:11] <russss> yeah I dunno how much of this is just the AGC picking up really faint stuff
[13:11] <G8DSU> Don't know why they disappeared. Will sort, thanks for letting me know.
[13:11] <russss> it's picking up my CurrentCost from the antenna on the roof
[13:11] <jcoxon> no problem - i keep an eye on the raw data
[13:12] <fsphil> G8DSU, you may have run the regular fldigi -- it erases the HAB settings
[13:12] <LazyLeopard> jcoxon: I've got a yagi pointed at Cambridge at present, and GB3NS is pretty ch in its null direction... ;)
[13:12] <jcoxon> hehe fair enough
[13:12] <LazyLeopard> How long til launch?
[13:12] <G8TMV> Why is he walking about holding the balloon? Does it need to warm up or something?
[13:12] <jonsowman> it's kinda fun
[13:12] <jonsowman> :p
[13:13] <fsphil> probably just trying not to trip on the line
[13:13] <fsphil> man that's a big balloon
[13:13] <jcoxon> LazyLeopard, i get GB3NS by pointing my antenna in the wrong direction, must be bouncing off something
[13:13] <jcoxon> thats a 3kg balloon
[13:13] <jonsowman> alt records?
[13:13] <jcoxon> the biggest you can get commercially
[13:14] <sbasuita> what's the predicted burst?
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[13:14] <jcoxon> very high
[13:14] <jcoxon> though the payload isn't that light
[13:15] <DanielRichman> sbasuita, can we *please* do an alt-attempt payload at some point?
[13:15] <jonsowman> jcoxon: any idea on payload mass
[13:15] <jcoxon> 700g i think
[13:15] <jonsowman> well burst calc reckons 39km at 5m/s ascent
[13:15] <jcoxon> not that much He in there so hopefully a nice and slow ascent rate
[13:16] <jonsowman> < 5m/s you reckon?
[13:16] <jcoxon> yeah
[13:16] <jonsowman> 40.2km at 4m/s
[13:16] <jcoxon> exactly...
[13:16] <fsphil> wow
[13:16] <jcoxon> these balloons aren't cheap
[13:16] <SpeedEvil> At some low level, I suspect it may be wrong.
[13:16] <jonsowman> how much are they?
[13:16] <jcoxon> 200+
[13:16] <SpeedEvil> As there have been indications that a very underfilled balloon may actually have enough superpressure effect to hover.
[13:16] <jonsowman> SpeedEvil: maybe, i'm not sure how far this is extrapolating from known data
[13:17] <G0MJW> Limited lifetime too. We had a box of them but they had unfortunately perished.
[13:17] <jonsowman> jcoxon: blimey
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[13:17] <fsphil> okie, time I got the laptop setup
[13:18] <jcoxon> fsphil, up into the attic again?
[13:20] <G0MJW> Should become LOS to me at 850m AGL.
[13:21] <jcoxon> oh yeah
[13:21] <G8DSU> fsphil: yes I had run the regular fldigi recently- that explains it - thanks
[13:21] <juxta|console> any word on launch status?
[13:21] <g3vzv> G0MJW - or AOS?
[13:22] <jcoxon> everyone who is listening - would be great if you could compare the green circle on the tracker with when you get a signal
[13:22] <jcoxon> juxta"
[13:22] <G0MJW> Watching video I would say soon.
[13:22] <jcoxon> juxta|console, http://www.ustream.tv/channel/xaben
[13:22] <juxta|console> awesome jcoxon, cheers
[13:22] <RocketBoy> yes tis soon
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[13:23] <fsphil> jcoxon, yep -- sans-spider this time hopefully
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[13:25] Action: LazyLeopard wonders wo's who on the video stream... ;)
[13:26] <sbasuita> LazyLeopard: rjh is in brown, i think in the blue is steve randall
[13:26] <jonsowman> who's red?
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[13:26] <jcoxon> oops, just updating hte trackers realtime predictor gfs
[13:27] <jcoxon> is ed there perhaps?
[13:27] <jonsowman> jcoxon: was wondering that
[13:27] <jonsowman> he did say he was thinking of going
[13:28] <jcoxon> might be sensible if they start uploading data to the map!
[13:28] <G0MJW> Thought I saw him in earlier picture.
[13:28] <jonsowman> guess that's him in the red then
[13:28] <jonsowman> looks like him
[13:28] <jonsowman> from what i can see anyway
[13:31] <SpeedEvil> Who's that in the pink balet dress?
[13:31] <SpeedEvil> oops - wrong stream.
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[13:31] <jonsowman> ed maybe
[13:31] <RocketBoy> is that logging from me?
[13:31] <jcoxon> RocketBoy, yup
[13:31] <G8TMV> should dl-fldgi get the data settings correct?
[13:31] <jonsowman> G8KHW
[13:31] <G8TMV> or do I need to set them
[13:31] <jcoxon> your location is felixstowe
[13:32] <G0MJW> Launching
[13:32] <jonsowman> good luck rjh
[13:32] <jcoxon> G8TMV, the only thing to check is no parity and 1.5 stop
[13:32] <sbasuita> no wind = boring launch ;P
[13:32] <DanielRichman> G8TMV, when you hit the "autoconfigure button" it should set up rtty ready to go
[13:32] <jonsowman> sbasuita: lol
[13:32] <DanielRichman> sbasuita, there's your wind
[13:33] <sbasuita> lol what
[13:33] <sbasuita> can't see it :/
[13:33] <jonsowman> going to be an interesting flight
[13:34] <jcoxon> got it
[13:34] <g4ufs> S1 in Milton Keynes
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[13:35] <LazyLeopard> Hearing it just
[13:35] <G0MJW> Go it too
[13:35] <G8TMV> frequency?
[13:35] <jonsowman> 7.7m/s :o
[13:35] <g4ufs> RX on 434.074 USB, freq is falling slightly
[13:35] <LazyLeopard> a bit before the green circle got here.
[13:35] <jcoxon> jonsowman, hmmm played it safe i guess
[13:35] <jonsowman> yeh
[13:36] <russss> I still don't have anything
[13:36] <russss> but my antenna is non-directional
[13:36] <jonsowman> russss: where are you?
[13:36] <russss> oh wait
[13:36] <russss> it's right inside some massive interference
[13:36] <g4ufs> My antenna is an omni
[13:36] <jcoxon> getting quite a bit of drift
[13:36] <russss> gotcha
[13:37] <jonsowman> :)
[13:37] <SpeedEvil> Oooh - totally missed it
[13:37] <LazyLeopard> I'm tuned to 434,073,500 USB
[13:37] <G0MJW> Still not quite strong enough to decode but definitely there
[13:37] <G8TMV> I've got a strong signal but garbage decode - can someone confirm the data rates etc
[13:37] <russss> I am hearing it at 434.074.00 + 600/1000Hz
[13:38] <russss> there is something very strong at +800 though
[13:38] <jcoxon> G8TMV, 50 baud, ascii-8, 425shift no parity, 1.5stop
[13:38] jaybro (~me@5adc6f70.bb.sky.com) joined #highaltitude.
[13:39] <sbasuita> hmm the tracker says 11:39 on the graph (not utc or bst)
[13:39] <jcoxon> yeah natrium has got it wrong
[13:39] <jcoxon> he went hte wrong way with his timezones
[13:40] <DanielRichman> and I recall from our launch; is the same here: http://robertharrison.org/mobile.php
[13:40] <G0MJW> Lots of frequency drift
[13:40] <DanielRichman> you see that the "Last Telemetry" string is way off
[13:40] <DanielRichman> **time
[13:41] <jcoxon> wow the new fldigi decoder is much better at surviving interference
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[13:41] <russss> yeah
[13:41] <russss> I have so much interference
[13:42] <DanielRichman> noise? or
[13:42] <russss> not noise
[13:42] <russss> squawking and chirping
[13:42] <DanielRichman> :o
[13:42] <russss> some kind of wideband data
[13:42] <G0MJW> I have a lot of fading and interference unfortunately about 70% copy.
[13:43] <russss> doesn't look like I can get a waterfall snapshot from the HAB mode?
[13:43] <jcoxon> russss, as in the png export function?
[13:43] <russss> yes
[13:44] <LazyLeopard> ...and so far rigcat and hab are co-operating. Not crashed yet, anyway.
[13:44] <GW8RAK> According to the green circle on the map, it isn't here yet, but there is definitely something on fldigi waterfall
[13:44] <jcoxon> russss, should work, the file is probably being deposited somewhere weird
[13:44] <DanielRichman> IIRC it wasn't finished; and the file goes into the CWD
[13:45] <russss> the shift is dropping
[13:46] <jcoxon> new fldigi has custom shift :-p
[13:46] <fsphil|attic> thankfully
[13:46] <LazyLeopard> Raining here... It's traditional...
[13:46] <russss> using a shift of 400 now
[13:46] <fsphil|attic> shame it can't auto detect the shift
[13:46] <G0MJW> What green circle?
[13:46] <jonsowman> the radio horizon on the tracker
[13:47] <GW8RAK> G0MJW there is a green circle on the tracker map showing the radio horizon
[13:47] <G8TMV> Hmm.. I'm still getting garbage
[13:47] <G0MJW> Not on my tracker. You know going faster would help, I get fading about once every 2-3 secs.
[13:47] <DanielRichman> G8TMV, are you receiving on USB or LSB?
[13:47] <LazyLeopard> You have got USB selected?
[13:48] <jcoxon> sql should be off on dl-fldigi as well
[13:48] <DanielRichman> G8TMV, it doesn't matter which you choose, however you must make sure that fldigi has the same one chosen
[13:48] <g4ufs> Am not taking telemetry but suspect the temp is changing as frequency increasing
[13:48] <G8TMV> yes and yes
[13:49] <jcoxon> internal temp 1.4, external -20.0
[13:49] <fsphil|attic> ah man, bad noise in 434 mhz
[13:50] <DanielRichman> wow it's getting cold inside there
[13:50] <russss> -1.1 internal now
[13:50] <LazyLeopard> G8TMV: did you hit "Autoconfigure" after selecting the payload?
[13:50] <g3vzv> 20 over 9 here but I am not appearing on the tracking map although fldigi says sending to the server ...odd
[13:51] <jcoxon> g3vzv, your lat/lon is the wrong format
[13:51] <jonsowman> google reckons view.php is in indonesian
[13:51] <jonsowman> :\
[13:51] <SpeedEvil> Still only one reciever
[13:51] Action: Randomskk wakes up
[13:51] <russss> I dunno why my packets aren't getting accepted
[13:51] <russss> they look valid
[13:51] <SpeedEvil> g3vzv: oh - your packets are getting tracked
[13:51] <Randomskk> hmm I wonder if I could get it on the whip from my room
[13:51] <Randomskk> it's gonna go around the building in a second
[13:52] <jonsowman> http://robertharrison.org/listen/view.php?reg=/RUSS/
[13:52] <jonsowman> Randomskk: yo
[13:52] <jcoxon> oh no its more that because of the speed of the next packet only one gets registered on the tracker before the next arrives
[13:52] <jcoxon> the server is logging them all
[13:53] <GW8RAK> Starting to get audio reliably here in North Wales, but not enough to decode.
[13:53] <SpeedEvil> ah
[13:53] <g3vzv> james - thanks for the reassurance:)
[13:53] <G8TMV> Ah! it was flrig buggering things up
[13:53] <G8TMV> stopping that and suddenly things work
[13:53] <jcoxon> G8TMV, oh sorry!
[13:53] <russss> oh, my "online" flag dropped for some reason
[13:54] <russss> I am submitting again now
[13:54] <jcoxon> g3vzv, so just decimal lat/lon with no NSEW
[13:54] <jcoxon> raw data: http://www.robertharrison.org/listen/view.php
[13:54] <LazyLeopard> ...and positive for N and E ;)
[13:54] <russss> shift of 375 now
[13:55] edmoore (~ed@pluto.trinhall.cam.ac.uk) joined #highaltitude.
[13:55] <LazyLeopard> Yeah, it seems to narrow as temperature decreases...
[13:55] <edmoore> afternoon chaps
[13:55] <jonsowman> edmoore: hi
[13:55] <LazyLeopard> Hiya Ed.
[13:55] <edmoore> 7m/s - that's pretty fast!
[13:55] <edmoore> is there a valve system?
[13:55] <jcoxon> yeah perhaps a litle too much
[13:56] <jcoxon> while the realtime predictor is amazing it slightly takes the fun out of hte tracking bit
[13:57] <edmoore> i mean it may still get an alt record by virtue of being a big expensive 3kg balloon with a relatively light payload, but i'd have thought if you wanted to get the most out of it you'd want to be about half that
[13:57] <fsphil|attic> what's the current frequency?
[13:57] <edmoore> oh well, at least we'll find out soon enough :)
[13:57] <russss> Receivers: M6JCX, M6JCX, M6JCX, M6JCX, M6JCX, M6JCX, M6JCX
[13:57] <jcoxon> my internet is quicker
[13:57] <jcoxon> haha
[13:57] <LazyLeopard> 434074350 works for me
[13:58] <fsphil|attic> spome
[13:58] <fsphil|attic> someone is cutting their grass, the mower is causing all sorts of noise
[13:58] <russss> hah
[13:58] <fsphil|attic> no sign of any rtty thoguh
[13:58] <juxta|console> it looks like it just went back a bit there, haha
[13:58] <LazyLeopard> Frequency's drifting down...
[13:59] <russss> it's drifing towards my interference again
[14:00] <Laurenceb> is this an altitude attempt?
[14:00] <Laurenceb> with a valve?
[14:00] <jcoxon> no valve
[14:00] <jcoxon> alt attempt
[14:00] <Laurenceb> ah ok
[14:00] <RocketBoy> not really and no
[14:00] <jcoxon> hehe
[14:00] <russss> hah, now who's got the fastest internet
[14:00] <jcoxon> it'll go high
[14:00] <Laurenceb> 7m/s isnt too good
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[14:01] <Laurenceb> v low wind
[14:01] <edmoore> look at alt plot
[14:01] <jcoxon> who knows what will happen
[14:01] <sbasuita> i'm surprised he didn't opt for a really slow ascent given that its heading west
[14:01] <edmoore> do you think that's circulation in the boundary of the jetstream?
[14:01] <jcoxon> edmoore, could well be
[14:01] <Laurenceb> wheres the plot?
[14:02] <sbasuita> Laurenceb: botton of http://spacenear.us/tracker
[14:02] <russss> shift of 360 now
[14:02] <jcoxon> that balloon is so big it might respond to the change a bit more perhaps
[14:02] <edmoore> below the map
[14:02] <G0MJW> Does not seem to be going anywhere.
[14:02] <Laurenceb> oh
[14:02] <edmoore> jetstream jetstream
[14:02] Action: Laurenceb learns to scroll
[14:02] <Laurenceb> yeah thats interesting - maybe turbulence
[14:02] <Laurenceb> right altitude for jetstream
[14:03] <edmoore> bang on
[14:03] <G0MJW> Boomerang Balloon
[14:03] <Laurenceb> is the predicted burst alt revised using the averaged ascent velocity?
[14:03] <jcoxon> no the burst alt is set
[14:03] <edmoore> i don't beleive so
[14:03] <GW8RAK> I've just changed the shift down to 350Hz and getting reasonable decodes
[14:03] <Laurenceb> it s changing
[14:03] <jcoxon> i put it at 40km this morning as i thought there might an attempt
[14:04] <Laurenceb> just wend down 100m
[14:04] <Laurenceb> *wbet
[14:04] <jonsowman> burst alt is changing
[14:04] <edmoore> is that descent rate adaptive algorithm online?
[14:04] <jonsowman> 8.6 m/s, wow
[14:04] <LazyLeopard> Hmmm... 434073460 now, too....
[14:05] <fsphil|attic> dial freq.?
[14:05] <russss> I'm on 434.073.44 USB
[14:06] <LazyLeopard> Yeah, as seen on tuning dial...
[14:06] <fsphil|attic> the lawnmower man seems to have stopped
[14:06] <G0MJW> 10.4m/s?
[14:07] <edmoore> might be the top of the jet stream
[14:07] <edmoore> some up currents from turbulance
[14:07] <fsphil|attic> and I've made myself a seat!
[14:07] <Laurenceb> or the temperature
[14:07] <Laurenceb> if the envelope is hot
[14:07] <jonsowman> fsphil|attic: any spiders around this time?
[14:08] <Laurenceb> especially significant effect with large envelopes
[14:08] <G0MJW> Pity temp is not shown on tracker.
[14:08] <fsphil|attic> jonsowman, none so far but to be honest I'm not looking around much :)
[14:08] <jonsowman> haha
[14:08] <Laurenceb> fsphil|attic: or wasps
[14:08] <G0MJW> As a graph.
[14:08] <fsphil|attic> the only buzzing up here is my server
[14:08] <fsphil|attic> at least, I think that's what it is...
[14:08] <Laurenceb> run away
[14:09] <Laurenceb> :p
[14:09] <jcoxon> G0MJW, we are working on that but its taking time as we want it to be as flexible as possible for hte various payloads
[14:09] Action: fsphil|attic ponders VNC'ing into the laptop from downstairs
[14:10] <G0MJW> It would show you the tropopause - if you get that high.
[14:10] <fsphil|attic> okie I should be hearing something soon
[14:10] chembrow (~chris@188-221-15-153.zone12.bethere.co.uk) joined #highaltitude.
[14:10] <LazyLeopard> Hmmm... Signal a bit fadey there...
[14:10] <russss> here too
[14:10] <fsphil|attic> I hear it¬
[14:10] <fsphil|attic> well I did
[14:10] <fsphil|attic> gone again
[14:10] <GW8RAK> I think it must be swinging around a bit.
[14:11] <chembrow> what's the rtty set to? 8n1?
[14:11] <russss> it looks like the new fldigi is worse at decoding if it does encounter some corruption
[14:11] <G0MJW> Frequency is all over the place. I think it is spinning.
[14:11] <GW8RAK> fading regularly over about 5s
[14:11] <russss> 8n1.5
[14:11] <LazyLeopard> It's swinging, and I've got a tree with wet leaves too nearby...
[14:11] <fsphil|attic> got it in the waterfall
[14:11] <fsphil|attic> very weak
[14:11] <russss> 50 baud, 360 shift
[14:11] <G0MJW> Doppler shift at 435MHz is....
[14:11] <russss> (currently)
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[14:12] <jcoxon> wow thats impressive
[14:12] <jcoxon> might be about to leave the JS perhaps
[14:12] <g3vzv> is the doppler shift causing the fluttery variation in frequency?
[14:12] <g3vzv> (asit swings about)
[14:12] <fsphil|attic> not fast enough
[14:12] <edmoore> i think that's improbable
[14:13] <sbasuita> you can tell when it burst from the doppler though
[14:13] <edmoore> the radial velocity to a listener would be probably 10m/s max
[14:13] <sbasuita> which is quite exciting
[14:13] <edmoore> which would only be a few hz doppler
[14:13] <fsphil|attic> no text decoded yet
[14:13] <russss> I am not decoding fully now, due to fading.
[14:13] <G0MJW> It only is a few Hz, maybe 30 or so, so if it were swinging that might explain it.
[14:14] <fsphil|attic> decoded "icar"
[14:15] <russss> I think I got a full sentence there
[14:15] <g3vzv> it seems improbable to me too but I cannot dream up an alternative explanation
[14:16] <edmoore> well, if the swinging caused an ac amplitude in radial velocity of 10m/s relative to you, the doppler would be roughly 434e6-(3e8/(3e8+10))*434e6 which is about 15Hz
[14:16] <G0MJW> I am still decoding fine - I think.
[14:16] <edmoore> so if that's what you're getting, that's perhaps it
[14:16] <fsphil|attic> nearly got that line
[14:17] <G0MJW> Yes +-15 Hz is 30 and it is sinusoidal on the waterfall.
[14:17] <G0MJW> It has stopped now.
[14:17] <G0MJW> And now back - so a pendulum rotating as well.
[14:18] <edmoore> it'd be 15Hz total peak to peak, and i reckon 10m/s would be an upper bound on that as that's actually quite fast
[14:18] <edmoore> what's the period ooi?
[14:18] <edmoore> 5s did you say?
[14:19] <G0MJW> About 5s are you not hearing this shift Ed?
[14:19] <GW8RAK> Only getting weak signals now, but that happened with the Alien launch at this altitude
[14:20] <edmoore> G0MJW: my radio is unfortunatly not in camb currently
[14:20] <russss> I am decoding about 1 per minute
[14:20] <edmoore> i'm deaf
[14:20] <fsphil|attic> v
[14:20] <fsphil|attic> fading a lot
[14:21] <Randomskk> loads of fading and noise here, just hooked up radio
[14:21] <Randomskk> am on whip and LoS blocked though
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[14:24] ki6ymz (~dave@c-67-190-100-35.hsd1.co.comcast.net) joined #highaltitude.
[14:24] <chembrow> got a clear "$$icarus," then more garbage
[14:24] <ki6ymz> how is Icarus III going?
[14:25] <g3vzv> up
[14:25] <fsphil|attic> yea a lot more breaks in the signal this time, compared to alien
[14:25] <LazyLeopard> rapidly....
[14:26] <ki6ymz> LazyLeopard: is the ~8m/s on the tracker correct?
[14:27] <fsphil|attic> spinning quite a bit
[14:27] <G0MJW> Just speeded up the AGC to attempt to avoid the fading
[14:27] <LazyLeopard> I think it's averaging a bit less than that...
[14:28] <edmoore> Randomskk: did you say you were having LoS issues?
[14:28] <Randomskk> edmoore: north facing window with a slight protrustion to either side means picking up balloons once they are west or east is hard
[14:29] born_ (~5818cf7b@gateway/web/freenode/x-hrehwpanbwcnsynf) joined #highaltitude.
[14:29] <born_> hi
[14:29] <Laurenceb> predicted burst it going up down
[14:29] <Laurenceb> whats going on?
[14:29] <Laurenceb> natrium42: is it your code?
[14:29] <born_> i'm new in it
[14:29] <jcoxon> ki6ymz, in the air http://spacenear.us/tracker
[14:29] <jcoxon> born_, hi welcome to #highaltitude
[14:30] <jcoxon> there is a launch going on right now
[14:30] <LazyLeopard> ki6ymz: I think it's nearer 7.5 than 8...
[14:30] <jcoxon> you can follow it here: http://spacenear.us/tracker
[14:30] <ki6ymz> I'm following, wish I was in the UK so I could track, too!
[14:30] <ki6ymz> (this is stilldavid at home in CO, USA)
[14:30] <fsphil|attic> decoded a line
[14:30] <born_> i have just a question about balloon radio links: is it possible to use wi-fi bands in airborne apps?
[14:31] <jcoxon> born_, depends where you are based really
[14:31] <russss> I don't think it's illegal, is it? I doubt it would work though.
[14:31] <chembrow> getting full sentences now
[14:32] <russss> wifi needs a reasonably good s/n ratio
[14:32] <fsphil|attic> ery nice signal here now
[14:32] <fsphil|attic> +V
[14:32] <russss> yep, looking good here now.
[14:33] <born_> i'm based in Catalonia (Spain). we plan sending images in real time, so we need a high data capacity
[14:33] <G0MJW> It has moved above my beam pattern so is getting weaker here. When I have elevation things will get better.
[14:34] <G8TMV> Hmm.. the shift seems to be wandering about
[14:35] <LazyLeopard> Yeah. I'm on 434073960 with a shift of 380 at present.
[14:35] <russss> I am still getting good results on a 360Hz shift
[14:35] <russss> born_: well, I guess anything's possible with a big enough antenna
[14:35] <jcoxon> born_, it'll depend on you national laws
[14:36] <jcoxon> i'm not sure what the rules are in Spain
[14:36] <born_> ok thank you!
[14:37] <g4ufs> can anyone tell me what the telemetry is after the position info?
[14:37] <G0MJW> What is the altitude record?
[14:37] <edmoore> he may well still be on for an alt record. for Nova 12 we sent up really quite a big and heavy payload on a 3kg balloon at quite a high speed (6m/s) and came pretty close to the uk alt record, without meaning to. so if this is a light payload it probably can do it
[14:37] <fsphil|attic> beautiful signal now
[14:37] <edmoore> 35.289km
[14:37] <russss> is the external temperature really just -1.9 degrees now?
[14:38] <jcoxon> altitude, speed, bearing, int temp, ext temp
[14:38] <jcoxon> yeah
[14:38] <g4ufs> ty jc
[14:38] <jcoxon> 30km
[14:38] <russss> I guess that's probably going to be affected a bit by the payload though
[14:38] <Laurenceb> whats the record?
[14:38] <G0MJW> That is because it is entering the stratosphere I suppose.
[14:38] <g4ufs> Presumably, the end HEX is a checksum?
[14:38] <fsphil|attic> temperatures seem quite high?
[14:38] <fsphil|attic> g4ufs, yes
[14:39] <g4ufs> ty
[14:39] <Laurenceb> MI6VIM is getting some impressive range
[14:39] <russss> well, it's definitely getting warmer, you can see from the frequency.
[14:39] <russss> I just had to tune up a bit
[14:40] <G8TMV> me too
[14:40] <LazyLeopard> Yes, it's drifting up, and it's stopped wavering so much, too.
[14:40] <G0MJW> Notice the frequency shifting (Doppler) has ceased.
[14:40] <fsphil|attic> the second temperature is above zero now
[14:41] <g3vzv> and its warming up again inside the bxo
[14:41] <g3vzv> *box
[14:42] <russss> hah, I just managed to decode a sentence out of a -17dB SNR
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[14:44] <russss> it's warm in the stratosphere today
[14:44] <edmoore> russss: i don't believe you!
[14:44] <G0MJW> Oh 33k
[14:45] <russss> I'm just going by what this here balloon is saying.
[14:45] <fsphil|attic> good altitude
[14:45] <edmoore> i reckon it's wrong. or witchcraft
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[14:45] <G8TMV> In the waterfall, is it best if the red bars that mark the shift width are slightly wider than the red stripe of the signal?
[14:45] <edmoore> they should be the same
[14:46] <edmoore> they're the centre of each of the two matched filters
[14:46] <edmoore> but if you have no choice, it's be a tradeoff between which setting gives you closest vs how much overlap you're getting
[14:46] <g4ufs> is it really rising at aprox 150 metres per frame?
[14:46] <G0MJW> 34k
[14:47] <fsphil|attic> sweet
[14:47] <fsphil|attic> I can't believe how well this is decoding
[14:47] <jcoxon> edmoore, new fldigi has custom shift!
[14:48] <G8TMV> edmoore: and the little fat bars at the top are the filter width?
[14:48] <edmoore> neat
[14:48] <russss> yeah
[14:48] <russss> you can fiddle with the filter width too but you probably don't need to.
[14:49] <fsphil|attic> fading
[14:49] <russss> I think that might be a burst
[14:49] <g3vzv> 35k
[14:49] <G0MJW> 35K!
[14:49] <russss> oh no
[14:49] <g3vzv> yu
[14:49] <russss> yes, it has burst
[14:49] <fsphil|attic> wheeeee
[14:49] <russss> 35059
[14:49] <russss> which is 200m under the UK record
[14:49] <fsphil|attic> spinning really fast!!
[14:49] <G0MJW> Record missed by 300m?
[14:49] <edmoore> that's just teasing rob really isn't it
[14:50] <fsphil|attic> lets hope he got pictures this time
[14:50] <G0MJW> I recon he had a pyro and set it off just then.
[14:50] <edmoore> lol
[14:50] <edmoore> i'm not sure he did - those 3kg balloons cost a stupid amount
[14:50] <edmoore> it's not a cheap game, going after alt records
[14:51] <DanielRichman> looks like it's going to land in someones house
[14:51] <G0MJW> I thought they only cost £200?
[14:51] <fsphil|attic> till decoding
[14:51] <G8TMV> it's coming down really fast, I hope the spin hasn't wrapped the parachute
[14:51] <G0MJW> Is that one of Collin Pillenger's parachutes?
[14:51] <russss> at the moment the initial prediction was bang on
[14:53] <edmoore> G0MJW: i consider that very expensive :)
[14:53] <G0MJW> It is but think of the cost of petrol to chase it and all the rest.
[14:53] <edmoore> I don't think there has been a single flight ever in all the 50 or so i've been around for when someone hasn't paniced at the speed of the initial descent
[14:53] <edmoore> me included
[14:54] <Randomskk> in how many cases did the parachute not in fact deploy? :P
[14:54] <G0MJW> Don't panic - there is no air up there.
[14:54] <fsphil|attic> temperature has plummeted
[14:54] <g3vzv> Is there any need for an extra chaser/searcher...its not far from me:)
[14:54] <G0MJW> Well not much anyway. 99% of it is below 10k
[14:55] <ki6ymz> fsphil|attic: what's the temp reading?
[14:55] <G0MJW> -40C
[14:55] <ki6ymz> ... which is the same in F :) that's cold!
[14:56] Nick change: ki6ymz -> stilldave
[14:56] <fsphil|attic> it was above 0c before it started falling
[14:56] <stilldave> even at ~35k?
[14:57] <jcoxon> eek Bedford
[14:57] <G0MJW> It was 11.5C when it burst
[14:57] <GW8RAK> Getting good decodes now of all the fields, except for the first 4 characters.
[14:57] <russss> that was probably more an indication of how little air there is to convect
[14:57] <russss> more than anything else. It's presumably quite sunny up there,
[14:58] <LazyLeopard> GW8RAK: Make sure SQL is off in dl-fldigi
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[14:58] <GW8RAK> Bugger!
[14:58] <GW8RAK> Well spotted. I don't know why it was on.
[14:59] <SpeedEvil> the predicted path assumes that it's coming down at 5m/s? So it will generally weight the 'top' half of the winds way too much?
[14:59] <LazyLeopard> That can scupper the first few characters
[14:59] <GW8RAK> Thanks LazyLeopard
[14:59] <fsphil|attic> just about hear it
[15:00] <fsphil|attic> aaand it's gone -- earth is now in the way
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[15:01] <fsphil|attic> right, this is attic station signing off :)
[15:01] Action: SpeedEvil thinks wilden
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[15:01] <edmoore> SpeedEvil: the predictor has a correct atmospheric model
[15:02] <edmoore> so you specify and sea-level descent rate and it works out the ascent rates at upper altitudes as appropriate
[15:02] <SpeedEvil> edmoore: Ah.
[15:02] <SpeedEvil> neat.
[15:03] <SpeedEvil> I thought it only did that for ascent for some reason
[15:03] <g3vzv> its just turned south - exactly as predicted
[15:04] <edmoore> now i wrote an algo for natrium that would calculate the actual ballistic co-efficient based on real descent data and update the predictor as appropriate, but i'm not sure if it's been intergrated yet
[15:09] <fsphil> back
[15:10] <fsphil> 100km/h decent?
[15:10] <g3vzv> almost reached - 50 externally - the transmitter is doesnt like the cold and drifts down quickly below minus 15
[15:10] <jcoxon> horizontal velocity
[15:10] <russss> frequency is plummeting
[15:10] <g3vzv> internal temp is still going down
[15:10] <fsphil> ah
[15:11] <fsphil> fairly green area
[15:12] <edmoore> jcoxon: nova 11 reached 35076m
[15:12] <edmoore> check logs on 20090402 at 15:34hrs
[15:12] <g3vzv> how about a landing on one of the massive airships sheds at cardington:)
[15:13] <jcoxon> edmoore, yeah that rings a bell
[15:13] <fsphil> you really ain't far away g3vzv
[15:14] <jcoxon> edmoore, updated
[15:14] <edmoore> jcoxon: thanks
[15:14] <jcoxon> fsphil, did you increase your range today?
[15:15] <edmoore> what was the highest reading on Ic III?
[15:15] <G0MJW> You don't want to land near Bedford - terrible traffic.
[15:15] <fsphil> not sure yet jcoxon
[15:15] <jcoxon> 35059m
[15:16] <LazyLeopard> It's heading for a wet landing...
[15:16] <jcoxon> fsphil, its gone the other way this time to Alien so suspect its not
[15:16] <edmoore> yessssssssss
[15:16] <edmoore> we keep our #2 slot then :p
[15:16] <jcoxon> but depends what the onboard log has as well
[15:17] <edmoore> sure indeed
[15:17] <G8TMV> wow freq rising fast again
[15:17] <LazyLeopard> Prediction's moved away from the river. :)
[15:17] <fsphil> just hope it keeps away from that industrial estate
[15:18] <G0MJW> Might land on the A421.
[15:18] <fsphil> eek
[15:18] <jcoxon> fingers crossed
[15:18] <jcoxon> tis a small area in relation to the rest of the landing zone
[15:18] <g3vzv> that would be "exciting"
[15:19] <fsphil> any news from rjh? are they nearby?
[15:19] <jcoxon> they are just north of bedford coming down on the A6
[15:19] <G0MJW> signal fading now.
[15:20] <g4ufs> still pretty strong hee in Milton Keynes
[15:21] <G8TMV> still ok in Cambridge too
[15:21] <SpeedEvil> mk should have signal till under 1km
[15:21] <SpeedEvil> it's pretty flat IIRC
[15:21] <g3vzv> ugh A6 into Bedford on a Sat afternoon - not nice
[15:22] <G0MJW> Behind the hills now.
[15:22] <fsphil> nice big field by the looks of it
[15:22] <LazyLeopard> Struggling a bit here. Not helped by another OOM crash... ;)
[15:23] <jcoxon> gone here
[15:23] <russss> I'm out
[15:23] <russss> it's gone
[15:23] <G0MJW> Just hearing it here but very weak now.
[15:23] <fsphil> eep.. trees
[15:23] <LazyLeopard> 1097 metres
[15:24] <G0MJW> Lost it.
[15:24] <g3vzv> 621 meter
[15:24] <LazyLeopard> ...I might have got, but now it's gone.
[15:24] <G8TMV> Lost it
[15:24] <g4ufs> LOS
[15:24] <g3vzv> suddenly stopped at 14:24:06
[15:24] <g3vzv> no signal at all
[15:25] <G0MJW> Perhaps it has landed. Last time I was listening the antenna broke on landing.
[15:25] <LazyLeopard> Yeah, got the 1079 metre line but the 811 metre one was garbled at the end.
[15:25] <g3vzv> had 395 metres at 52.172562 - 0399388
[15:26] <sbasuita> odd descent graph
[15:26] <sbasuita> the speed seems to increase at the end
[15:26] <jcoxon> sbasuita, could have got tangled a bit
[15:26] <G0MJW> 395m? But what is the ground height there?
[15:26] <edmoore> that looks like nova 11
[15:27] <fsphil> sudden drop suggests it's on the ground and not on those trees
[15:27] <fsphil> that's a plus anyway
[15:27] <G0MJW> 70m approx.
[15:28] <jcoxon> shouldn't be too difficult to retrieve
[15:28] <jcoxon> rob is on his way now
[15:29] <SpeedEvil> yeah - it looks quite benign territory.
[15:29] <jonsowman> quick python script to extract the tempatures from view.php
[15:29] <jonsowman> http://www.hexoc.com/icarus/tempint.txt
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[15:30] <jonsowman> http://www.hexoc.com/icarus/tempext.txt
[15:30] <SpeedEvil> Smack on a farm track even.
[15:30] <SpeedEvil> (I have doubts)
[15:30] <sbasuita> ours was right by a farm track
[15:30] <sbasuita> hardly had to step foot in any field :)
[15:30] <G0MJW> You need to add a column for height to that script.
[15:30] <jonsowman> yeh i know
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[15:30] <jonsowman> work in progress
[15:31] <jonsowman> just quickly knocked it up as i wanted to see it graphically
[15:31] <jonsowman> but i'll add an alt field
[15:31] <fsphil> jcoxon, looks like the first line received here was the most distant, 516.099 km
[15:32] <jcoxon> fsphil, fair enough
[15:32] <jcoxon> we'll leave 555km in place
[15:32] <fsphil> yea
[15:32] <jcoxon> do you want me to add this one to the list or shall we just leave it
[15:33] <fsphil> nah just leave it
[15:33] <jcoxon> as a Personal best sort of thing
[15:35] <DanielRichman> who made the 555?
[15:35] <edmoore> ?
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[15:36] <LazyLeopard> DanielRichman: That was fsphil last time.
[15:36] <DanielRichman> ah yes
[15:36] <DanielRichman> MI6VIM
[15:36] <jcoxon> edmoore, Rx range
[15:36] <edmoore> oh yep
[15:37] <jcoxon> bbl
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[15:37] <fsphil> the limit certainly isn't signal strength
[15:37] <LazyLeopard> Incidentally, caught that OOM crash in gdb. http://www.chocky.demon.co.uk/radio/fldigi-crash-3
[15:37] <jonsowman> http://www.hexoc.com/icarus/tempc.txt
[15:37] <jonsowman> alt, ext, int
[15:38] <jonsowman> seems to cut off after a bit, wonder why
[15:38] <fsphil> LazyLeopard, was that in hab mode?
[15:41] <LazyLeopard> No, that was in non-hab mode with rigcat running.
[15:42] <g3vzv> my 395 metre high spot was just above the top end of the ridge of trees so presumably it is SE of there by a bit!
[15:42] <jonsowman> ok bug fixed
[15:44] <DanielRichman> LazyLeopard, so your laptop ran out of memory and fldigi bailed out?
[15:44] <edmoore> bbl
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[15:44] <LazyLeopard> I guess... I expect it's fallout from some memory leak somewhere, rather than a pointer straight to the problem. Had the same sort of thing happen during the Alien flight after a fair while...
[15:45] <fsphil> I must run valgrind on it
[15:45] <LazyLeopard> The gdb session's still alive if there's anything else you'd like me to ask it...
[15:47] <LazyLeopard> The laptop has XChat running as well, but nothing else...
[15:48] <LazyLeopard> Mind, it's not the flashest laptop out there...
[15:49] <fsphil> unfortunately I'm not familiar enough with gdb to help narrow it down
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[15:51] <DanielRichman> fsphil, yeah valgrind is great; was going to use it later
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[16:04] <LazyLeopard> I guess if there are leaks then valgrind stands a good chance of finding them...
[16:05] <LazyLeopard> Now, what else was I going to do with the day today... ;)
[16:08] <LazyLeopard> mental note: signal level increases when antenna is connected to radio...
[16:08] <fsphil> map was updated, looks like rjh is near
[16:08] <fsphil> right in the middle of that field
[16:08] <LazyLeopard> (Clearly my memory's short term these days...)
[16:09] <fsphil> radios and aerials do work better with a conductor of some sort between them :)
[16:10] <LazyLeopard> Ok. Now I can hear that repeater...
[16:11] <fsphil> I haven't used a repeater yet
[16:11] <fsphil> listen to them the odd time
[16:11] <LazyLeopard> Must get back to tuning up that HF antenna some point soon.
[16:11] <LazyLeopard> The repeaters here are the easy way to make contact...
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[16:17] <RocketBoy> how did the UStream work for people - worth doing?
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[16:18] <g3vzv> I enjoyed the pictures thanks
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[16:19] <fsphil> I missed the launch unfortunately, but what I seen worked well
[16:19] <RocketBoy> what was the update rate like?
[16:19] <G8DSU> UStream was certainly worth doing! Thanks.
[16:20] <sbasuita> yeah cheers for the live tv; was definitely worth it
[16:20] <sbasuita> update rate was pretty reasonable
[16:21] <G8DSU> Rate was OK. Rather have a slow-ish rate but good image quality. You had a good balance.
[16:22] <RocketBoy> cool - chears
[16:22] <RocketBoy> any sign of rjharrison getting it back yet?
[16:24] <fsphil> he was close enough to receive it on the ground, dunno if he's actually got it yet
[16:25] <fsphil> it's pretty far from the road
[16:26] <LazyLeopard> Wonder whether it cleared those trees...
[16:26] <fsphil> it does seem pretty close
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[16:37] <RocketBoy> difficult to call - the final readings do seem to be very close to ground level - so my guess is it did (clear the trees)
[16:37] <SpeedEvil> Birdstrike?
[16:38] <RocketBoy> ?
[16:42] Action: SpeedEvil is trying to imagine what might befall a payload at 300m
[16:42] <RocketBoy> just have to wait i supose :-(
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[16:47] <futurity> Hi, Is the balloon burst yet / come back down?
[16:47] <jonsowman> it's down
[16:47] <jonsowman> not sure if rob has found it yet
[16:47] <futurity> cool record broken?
[16:47] <jonsowman> no :(
[16:47] <jonsowman> missed it by not very much
[16:47] <futurity> oh dear how high did it get?
[16:48] <jonsowman> missed it by 200m
[16:48] <futurity> does anyone have the tracker link?
[16:48] <sbasuita> futurity: http://spacenear.us/tracker ??
[16:48] <jonsowman> highest 35059m
[16:48] <jonsowman> i think
[16:48] <futurity> oh poor luck that he missed it by such a small amount
[16:48] <jonsowman> very
[16:48] <futurity> what this the uk or world record he missed?
[16:49] <SpeedEvil> uk IIRC
[16:49] <futurity> uk record then?
[16:49] <futurity> IIRC?
[16:49] <russss> world record is 39130m
[16:49] <jonsowman> "if i recall correctly"
[16:50] <russss> UK record is 35289
[16:51] <futurity> wow the world record is 5k higher
[16:51] <futurity> zero pressure balloon for the world record, or just a very big latex balloon?
[16:51] <futurity> sorry 4km higher
[16:54] <RocketBoy> rjharrison says he has got it back
[16:55] <RocketBoy> both cameras and the servo worked ok
[16:55] <futurity> fantastic :)
[16:55] <RocketBoy> missed the trees by about 4m
[16:55] <futurity> uploading launch video shortly
[16:55] <RocketBoy> cool
[16:55] <futurity> although doing a youtube test first
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[17:01] Nick change: Randomskk_ -> Randomskk
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[17:07] <edmoore> RocketBoy: http://img248.imageshack.us/img248/1743/screenshot20100515at170.png
[17:07] <edmoore> infact anyone who's been to EARS should recognise the above
[17:11] <futurity> wow
[17:11] <futurity> was that the onelaunched today
[17:11] <futurity> if so i turned up while it was still coming down
[17:12] <edmoore> was there EARS today?
[17:12] <edmoore> but anyway no, this is malcolm on Have I Got Newsfor You
[17:17] <RocketBoy> edmoore:cheers :-)
[17:17] <edmoore> the caption was pretty good too :)
[17:18] <RocketBoy> there was a private rocket launch out at EARS today - Andy Hugh tried for Level 3
[17:18] <edmoore> ah awesome
[17:18] <edmoore> successful?
[17:18] <RocketBoy> twas a bit bigger than malcs
[17:19] <RocketBoy> not really - the chute didn't deply properly - so a fail in L3 test terms
[17:19] <DanielRichman> "As the Tories refuse to agree to the Lib Dem demands to abolish Trident, Ming Cambell decides to do it himself"
[17:22] <sbasuita> Is there a good reason for qrz.com to have my postal address?
[17:22] <edmoore> yes
[17:23] <edmoore> you ticked a box saying they could have it
[17:23] <edmoore> probably
[17:23] <sbasuita> I meant that its asking me for it when I am registering
[17:23] <sbasuita> As a mandatory field
[17:23] <edmoore> oic
[17:23] <edmoore> yes
[17:23] <edmoore> qsl cards
[17:23] <sbasuita> I thought they were sent to the 'QSL Bureau' of your country or something?
[17:24] <Randomskk> they can be, but still with your address
[17:24] <edmoore> some people like going direct
[17:24] <edmoore> stuff can take months to filter through the bureaus
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[17:26] <DanielRichman> qrz.com: "Editor: Sorry, you are not authorized to update the callsign database."
[17:26] <DanielRichman> am I doing it wrong?
[17:29] <DanielRichman> sbasuita, have you added yourself yet>
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[17:42] <fsphil> DanielRichman, you need to ask on the forum
[17:42] <fsphil> or get someone else to add your callsign
[17:42] <fsphil> who's already registered
[17:42] <DanielRichman> any um.. volunteers ?
[17:42] <fsphil> I might be able too
[17:42] <fsphil> what's the callsign?
[17:42] <DanielRichman> thank you
[17:43] <DanielRichman> M6DRX
[17:44] <fsphil> hah, need your address -- wanna pm?
[17:44] <DanielRichman> :P
[17:46] <SpeedEvil> laurenceb: What were you wanting the adc for? http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7714/products/product.html
[17:47] <fsphil> brb, dinner!
[17:47] <SpeedEvil> (I know he's not here - to remind me to paste later)
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[17:50] <sbasuita> DanielRichman: could you add me to qrz?
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[17:50] <DanielRichman> sbasuita, yup
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[17:59] <jonsowman> http://www.hexoc.com/hab/icarus.txt
[17:59] <jonsowman> if anyone wants it
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[18:09] <SpeedEvil> Interesting.
[18:09] <SpeedEvil> http://www.mauve.plus.com/file.gif
[18:10] <jonsowman> SpeedEvil: nice :)
[18:10] <SpeedEvil> The interior is a nice smooth curve
[18:11] <edmoore> thermal mass for you
[18:11] <SpeedEvil> yep
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[18:14] <jonsowman> SpeedEvil: that random spike is weird
[18:15] <jonsowman> the altitude reading for that string is 1643r, where is should be 16432 according to other copies of that string
[18:15] <jonsowman> yet the checksums are the same
[18:15] <jonsowman> G3VZV : icarus,317,13:59:47,52.248127,-0.392475,16432,37.04,290.7,-7.1,-40.7*9F11
[18:15] <jonsowman> G8DSU : icarus,317,13:59:47,52.248127,-0.396475,1643r,37.4,290.7,-7.1,-40.7*9F11
[18:16] <SpeedEvil> reload for up/down
[18:16] <jonsowman> :)
[18:16] <SpeedEvil> checksums are not valid in the face of multiple errors
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[18:20] <SpeedEvil> I wonder if condensation could have some impact on the late-flight freq drift we've often seen
[18:21] <SpeedEvil> It's coming down through ~5km, having cooled to -20C or so
[18:23] <fsphil> how would you stop that? seal the ntx2 in a container?
[18:23] <SpeedEvil> possibly
[18:23] <SpeedEvil> The same would be visible if it's a cause if you take it out of a freezer into normal air
[18:23] <SpeedEvil> I think
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[18:23] <fsphil> ah, that could be tested pretty easily
[18:24] <futurity> launch video will be available in 1 hour ;)
[18:24] <SpeedEvil> I'm wondering as IIRC the drift at the end of flights is often quite severe. But the absolute temp is only 4C less perhaps than on the way up
[18:25] <DanielRichman> Would sillica gel in a sealed payload have any decent noticable effect, on that, and on any fogging up of the camera "window"?
[18:25] <russss> I think we decided it wouldn't.
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[18:25] <SpeedEvil> perhaps, yes - but the sealed payload would probably have more effect
[18:26] <SpeedEvil> And sealing is hard, for obvious reasons
[18:26] <DanielRichman> well we sealed alien1 to a certain extent
[18:26] <russss> silica gel takes a while to absorb moisture
[18:26] <DanielRichman> hmm so you'd have to seal it way in advance
[18:26] <russss> well in that case you could just purge it with helium
[18:26] <DanielRichman> true
[18:26] <DanielRichman> be back later
[18:27] <russss> isn't the best bet still to leave it sufficiently open that the water/ice sublimes off fairly quickly?
[18:29] <SpeedEvil> russss: I'm wondering about if condensation is occurring on the boards on the way down.
[18:29] <SpeedEvil> russss: Which is making the ntx2 shift in freq
[18:30] <russss> hmm
[18:30] <russss> would be relatively easy to seal the computer up with some silica gel
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[18:32] <SpeedEvil> or put it in a (small) balloon.
[18:34] <russss> balloons! genius!
[18:34] <russss> :P
[18:38] <russss> I still think heating is probably the best solution
[18:39] <SpeedEvil> you'd only need quite a small heater to get it to 20C or so after burst
[18:40] <russss> you could put a wavy resistance track on the PCB
[18:40] <russss> then it would be completely integrated
[18:43] <SpeedEvil> yup
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[19:32] <jcoxon> hmmm seeedstudio has stopped accepting eagle files it seems - now want gerbers
[19:33] <DanielRichman> russss, re: earlier http://alienproject.wordpress.com/2010/05/03/high-altitude/intvstime/ internal temperature never went below 20'C, as reported by the sensor
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[19:49] <G8DSU> Been away for a bit. Any pictures / videos yet?
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[20:14] <rjharrison> Evening all
[20:14] <rjharrison> Back in yorkshire
[20:20] <Randomskk> yo
[20:20] <Randomskk> recovery go well?
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[20:33] <futurity> rharrison: launch video online: http://www.youtube.com/watch?v=rbdpB4Ab_LQ
[20:33] <futurity> note the strange shape of the balloon as it goes up
[20:33] <futurity> flat top
[20:34] <futurity> also note how the arm always trails the payload. i take rharrison uses it to stabilise the camera rotation?
[20:35] <DanielRichman> interesting
[20:35] <edmoore> no, that's where you put the thing that makes you money
[20:35] <DanielRichman> yeah it's got an advert on it
[20:35] <futurity> yep, but it does seem to stop it rotating as well
[20:35] <DanielRichman> but if you want to stabilise the camera you have also gotta deal with the swinging
[20:35] <edmoore> it would only help initially. once he thing reaches equilibrium it should have no efect
[20:36] <futurity> true
[20:36] <edmoore> other than increasing the moment of inertia overall
[20:36] <futurity> in less than 4.5 minutes the balloon was lost in the clouds
[20:38] <edmoore> it realy did go up fast
[20:38] <edmoore> was that deliberate?
[20:38] <futurity> not sure
[20:38] <futurity> Rob did expect it to go up fast
[20:39] <edmoore> maybe trying to make it very touch-and-go on getting the alt record
[20:40] <futurity> so the faster you go up, the more chance of it bursting lower?
[20:40] <edmoore> oh well, it got 3rd place if the max telemetered altitude was also the max logged alt
[20:40] <edmoore> yep
[20:40] <edmoore> the balloon has a fixed burst diameter
[20:41] <edmoore> the more helium you put in it, the lower you will be when the volume of that helium (which is at the same pressure as outside) reaches the max volume of the balloon
[20:41] <futurity> I did wonder what would happen if you under-filled a latex balloon so that the lift was less. would you get a higher altitude as a result?
[20:41] <edmoore> yes indeed
[20:42] <edmoore> and that's the calculation we make before each launch
[20:42] <futurity> you'd get to the same altitude slower, drift a lot further away from the launch site of course
[20:42] <futurity> i see
[20:42] <edmoore> we balance the requirements of the mission with what the weather will allow us to get away with and so on
[20:43] <edmoore> so on a day like today you could have gone up way way slower (the weather was fine) and go quite a bit higher. As it stood it was averaging about 7.5m/s which is really very fast
[20:43] <edmoore> where usually we go for about 4m/s for a completely vanilla launch
[20:44] <futurity> so if its idea conditions with very little wind, or wind the keeps it over the launch site, you could get away with very little lift in order to reach maximum altitude. hmmm, so a very light payload, where most of the weight is in the latex balloon, could someone get away with half the helium?
[20:44] <Randomskk> any idea what the payload mass was?
[20:44] <edmoore> futurity: yep. and that's how you attempt alt records
[20:44] <futurity> i see
[20:44] <futurity> cool
[20:44] <edmoore> you need the biggest balloon you can get (unfortunately they're expensive) and build a fairly light payload
[20:45] <futurity> i think i may well go for an underfilled suicide mission then ;)
[20:45] <futurity> or just wait for ideal launch conditions
[20:45] <edmoore> and as little lift as you can get away with (remembering some effects like diffusion, meaning you will loose lift during the flight, and also thermal issues say at night)
[20:45] <futurity> so you cant just buy a smalled latex balloon and only fill that by the same ratio amount that you would a large balloon?
[20:46] <edmoore> unfortunately you can only make payloads so small
[20:46] <futurity> i guess they have less thickness and therefore don't strech as much as bigger balloons
[20:46] <futurity> true
[20:46] <edmoore> and if you want to make a useful payload (i.e with a camera) then it's going to have to weight at least about 300g
[20:47] <futurity> very true
[20:47] <edmoore> so if you do the maths you'll see you need a 2 or 3kg balloon to get to about 35km reliably
[20:47] <futurity> but i gps, transmitter and avr are light
[20:47] <futurity> ohh the batteries
[20:47] <Randomskk> you could do just gps, transmitter, avr, batteries for about 100g maybe
[20:47] <Randomskk> maybe 200
[20:47] <fsphil> solar? 10mw wouldn't need big panels?
[20:47] <edmoore> you can of course get luck with the weather or make a seriously super light payload, these are all options. but the 'science' of the altitude records is pretty simple, compared to other hab challenges
[20:47] <Randomskk> but that's a lot of money for absolutely no return except an alt record
[20:48] <DanielRichman> the gps chews a lot of power
[20:48] <Randomskk> there are bigger fish to chase basically
[20:48] <fsphil> ack, gps
[20:48] <DanielRichman> you could perhaps fly it with just one lithium
[20:48] <edmoore> and not all 3kg balloons are made equal. you may be unlucky and get one which bursts under less hoop stress
[20:48] <futurity> i see
[20:49] <DanielRichman> what does the "3kg" in a 3kg balloon relate to?
[20:49] <edmoore> the mass of latex
[20:49] <futurity> so its best to go for many experiments up there and if you get luck, you get lucky
[20:49] <edmoore> that's true for all balloons
[20:49] <DanielRichman> ah, I see
[20:49] <edmoore> futurity: i think so. i'm in it more for cool technical challenges, and alt records are a happy co-incidence if you happen to have a big balloon going very slowly
[20:50] <edmoore> happy side effect, rather
[20:50] <futurity> its so frustrating that only gps units give reliable altitude.
[20:50] <edmoore> yep
[20:50] <fsphil> nice launch
[20:50] <edmoore> but it's nice to know where you are too
[20:51] <futurity> i'm just pondering possible launches i could do. the smaller the balloon and the lighter the payload, the cheaper it is
[20:51] <edmoore> yep
[20:51] <edmoore> alt records are probably not the road to go down then
[20:51] <futurity> yes if you can get it back it definately helps
[20:51] <fsphil> without a big camera, the hadie payload would be about 100g
[20:51] <futurity> *definitely
[20:51] <fsphil> but there's no point without a good camera ;-)
[20:51] <sbasuita> has anybody actually done ionising radiation experiments up there? i remember hearing a team talking about it a few months back
[20:52] <futurity> that's a good point
[20:52] <edmoore> i'd first get a realiable flight computer that does the basics, then decide what interests you
[20:52] <futurity> capturing the view does make it a lot more interesting
[20:52] <edmoore> we had some kind of gamma ray detection thingamy a couple of years ago
[20:52] <sbasuita> edmoore: any interesting results?
[20:52] <futurity> i guess i could try launching using party balloons to start with
[20:52] <edmoore> i think not really. just what you might expect
[20:53] <futurity> dirt cheap balloons and not much helium, where testing important not altitude
[20:53] <DanielRichman> we were trying to find "interesting" things to put on Alien2
[20:53] <fsphil> where do you get dirt cheap balloons?
[20:53] <sbasuita> edmoore: an increase in radiation following a square law?
[20:53] <futurity> edmore: for low altitude testing ;)
[20:53] <edmoore> :)
[20:53] <futurity> well more ground level testing
[20:53] <edmoore> yeah
[20:53] <edmoore> just leave it running till the batts run out and see what happens
[20:54] <edmoore> sbasuita: i don't remember
[20:54] <futurity> and i could perhaps get a few test launches in within a day
[20:54] Action: sbasuita is wondering how high up you could tether a balloon
[20:54] <futurity> you have problems with the weight of the line
[20:54] <sbasuita> mmm
[20:54] <Randomskk> depends on weight per unit length string, maximum string tensile stress
[20:54] <sbasuita> somebody must have done the maths on this
[20:55] <futurity> plus the wind resistants of the line
[20:55] <edmoore> we had a cool video of this really ghetto payload, I think nova 4
[20:55] <edmoore> it had tripple pyrotechnic deployed parachutes and a rocket launch tube
[20:55] <futurity> i've flown kites quite high
[20:55] <futurity> in fairly good winds
[20:55] <sbasuita> http://vimeo.com/5686559
[20:55] <edmoore> i can't find it
[20:55] <Randomskk> edmoore: it launched a rocket?
[20:55] <sbasuita> what the
[20:55] <futurity> you only get to a point where the wind drags the line down
[20:55] <edmoore> oh... on our vimeo page
[20:55] <edmoore> d'oh
[20:55] <sbasuita> bye bye my pretty ;P
[20:55] <edmoore> Randomskk: yes. but this was seriously old school
[20:56] <fsphil> hehe
[20:56] <edmoore> you can see the 3 pringle-can parachute mortars
[20:56] <edmoore> and the central tube housed a small estes-d rocket
[20:56] <Randomskk> awesome
[20:56] <edmoore> and the huge air-brake was incase the mortars failed
[20:56] <sbasuita> did the rocket fire?
[20:56] <edmoore> as i recall, yep
[20:56] <edmoore> it wasn't in there when we found it
[20:57] <sbasuita> hah
[20:57] <edmoore> but it had no tronics onboard, and the video camera ilming the launch failed
[20:57] <sbasuita> :(
[20:57] <fsphil> that would have been mighty
[20:57] <sbasuita> oh btw
[20:57] <sbasuita> i assume hdds don't work at high alt?
[20:57] <Randomskk> not unless sealed
[20:58] <sbasuita> aren't all hdds sealed?
[20:58] <Randomskk> airtight sealed
[20:58] <fsphil> most have a small hole
[20:58] <edmoore> i don't think they're entirely pressure-sealed
[20:58] <G8TMV> most have a vent
[20:58] <Randomskk> little pockets of air hold the needle off the disk
[20:58] <edmoore> just ingress-sealed
[20:58] <sbasuita> hmm
[20:58] <edmoore> so yes, they wouldn't work
[20:58] <edmoore> but this is the age of flash anyway
[20:58] <sbasuita> want to do video on a2
[20:59] <sbasuita> but haven't really looked at choosing a camera
[20:59] <sbasuita> i just don't recall seeing any consumer ones that aren't tape or hdd
[20:59] <edmoore> jetstream!!! http://vimeo.com/1598522
[21:00] <fsphil> canon make a few really good (but expensive) flash cameras
[21:02] <sbasuita> ok... who put the straw in front of the camera? :P
[21:02] <sbasuita> http://vimeo.com/4155678
[21:02] <edmoore> that's the antenna
[21:02] <sbasuita> awesome vid
[21:03] <edmoore> oh yeah, so nova 11 infact is number 2 on the ukhas alt records, just forgot to put it up at the time
[21:03] <edmoore> which i think knocks alien off the podium. so having just said alt records are not very exciting, i take it back: ner ner ner ner ner
[21:03] <sbasuita> what cameras do you use for novas?
[21:03] <fsphil> TOSHIBA Camileo S20 -- stupid shape but really quite cheap
[21:04] <edmoore> sbasuita: not wed to anything in particular but the stills from the 'pretty' flights (novas 7-12) are mainly powershot a560s
[21:04] <edmoore> and the video is flip micro HD
[21:04] <sbasuita> interesting
[21:05] <edmoore> at least it is in that video
[21:14] <edmoore> sbasuita: if you go down the flip micro route, be aware that they interfere a great deal on the gps frequency
[21:15] <edmoore> so need physical separation and good electrical shielding
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[21:16] <sbasuita> thanks for the advice
[21:30] <edmoore> sbasuita: are school happy with the flight?
[21:33] <rjharrison> Boo
[21:33] <rjharrison> Sorry had supper
[21:34] <sbasuita> edmoore: yeah, it made big waves
[21:34] <sbasuita> we shouldn't have any issues with funding moving forward :)
[21:34] <edmoore> cool
[21:35] <edmoore> that's good then
[21:35] <sbasuita> i think with a2 we're going to go all out on the press
[21:35] <sbasuita> see how big we can get it
[21:35] <sbasuita> were really surprised with a1
[21:36] <edmoore> if that's what you want
[21:37] <sbasuita> maybe
[21:37] <sbasuita> its just fun seeing your project on news sites :D
[21:38] <DanielRichman> fun? It also means that after kicking up a storm you brick it on launch day - it might go humiliatingly wrong
[21:38] <edmoore> i'm sure i'll be suprised by the number of times the media can forget that this has been done before many many times
[21:38] <DanielRichman> the more the merrier
[21:39] <edmoore> not if it's lies and nonsense. that can be unhelpful.
[21:39] <DanielRichman> though actually I think in the early days alex was asking around and one of the journalists he spoke to (I think national news) knew it had happened before
[21:39] <sbasuita> true; i'm sure rjharrison's coverage has saturated the news for a while
[21:39] <DanielRichman> How do you get a press report that isn't lies and/or nonsense?
[21:39] <edmoore> they need a particular angle. you'll notice that rob's coverage all focussed on the 'nasa phoned up to ask how on earth it was done' bit
[21:40] <edmoore> DanielRichman: well it's sort of inversely proportional to the width of the coverage
[21:40] <edmoore> but the big outlets and news papers will copy the local rag that broke it initially
[21:41] <edmoore> so once factual inaccuracies get into that, you've had it
[21:41] <DanielRichman> I get the feeling that asking the nice journalist if you can read the article before its published doesn't work
[21:42] <edmoore> so be completely truthful and precise from the word go and you'll minimise the chance of having nonsense propagated. although sometimes nonsense sounds good to newspapers.
[21:42] <edmoore> you can, I think. they don't mind fact-checking
[21:42] <sbasuita> what sort of altitudes are we looking at with a tethered balloon?
[21:42] <sbasuita> say 600g balloon
[21:42] <edmoore> limits?
[21:42] <sbasuita> 1kg latex
[21:42] <sbasuita> mmm
[21:42] <sbasuita> oops
[21:43] <edmoore> 200ft i think is the notam-free limit
[21:43] <sbasuita> 600g payload
[21:43] <DanielRichman> If it's tethered can we use our full HAM licenses?
[21:43] <edmoore> you won't have a physics probloem, it'll be legislative
[21:43] <edmoore> i think so yes
[21:43] <Randomskk> really?
[21:43] <DanielRichman> repeater on a balloon anyone?
[21:43] <G8TMV> DanielRichman: yes, it's just a big antenna
[21:44] <G8TMV> People use kits for HF antennas quite often
[21:44] <G8TMV> kites
[21:44] <Randomskk> G8TMV: wouldn't the radio equipment itself be airborne as well as the antenna though
[21:44] <sbasuita> wonder what sort of line has the best strength/weight ratio
[21:44] <Randomskk> I imagine with the kite you use it to loft the antenna rather than the radio
[21:44] <G8TMV> doesn't matter as long as it's "Ground based"
[21:44] <sbasuita> i guess it doesn't need to be that strong though
[21:44] <edmoore> i'll let you get stressed by tethered balloons because it's a useful learning experience. but they can be pigs
[21:44] <sbasuita> edmoore: how so?
[21:44] <edmoore> the worst hab week of my life was related to tethered balloons
[21:45] <edmoore> if there's more than zero wind they really want to break free
[21:45] <edmoore> and they rock around
[21:45] <edmoore> they're not a stable shape to be stuck in a flow, unlike a kite
[21:45] <sbasuita> how long would a balloon last at, say, 500m?
[21:45] <sbasuita> assuming reasonable summer weather
[21:45] <edmoore> how long is a piece of string
[21:45] <sbasuita> ;P
[21:45] <edmoore> and note that that's illegal
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[21:46] <edmoore> i think you would be hard-pressed to tether to 500m
[21:46] <sbasuita> would it be hard to get clearance?
[21:46] <edmoore> that's about 3 to 4kg of string
[21:46] <edmoore> probably very hard yes
[21:47] <sbasuita> damn
[21:47] <edmoore> and if wanted it to stay vertical you need a lot more lift force than horizontal force from wind drag
[21:47] <edmoore> so you'd need like 10kg of lift
[21:47] <G8TMV> 500m is well inside the light aircraft and glider common flight path range and there are about 10 airfields within 15 miles of Cambridge
[21:47] <edmoore> you wouldn't be doing it from cambridge
[21:47] <edmoore> not churchill anyway
[21:49] <edmoore> without getting too much into detail, we've blown £2000 of balloon and heliums in three dies trying unsuccessfully to do some experiments from tethered balloons
[21:49] <edmoore> i *really* don't like them
[21:49] <edmoore> three days*
[21:49] <edmoore> and we weren't aiming as high as 500m
[21:50] <sbasuita> oh well
[21:52] <edmoore> if you want to get to 500m to test stuff, I would *absolutely* recommend renting a helicopter over tethering. I say this having tried both. So yes, give it a whirl if you want, but I hate them. It was a bad bad week.
[21:52] <sbasuita> i was thinking we could do a multi-day tether
[21:53] <sbasuita> not for testing
[21:53] <edmoore> i don't think the balloon would survive
[21:53] <edmoore> when we did a 60M tether in i think 2007 (was jcoxon, rocketboy and I) it burst after a few hours in bright sun
[21:53] <edmoore> the UV knackers it
[21:56] <rjharrison> I hate teahers too
[21:56] <rjharrison> tethers too
[21:56] <rjharrison> even
[21:57] <rjharrison> Slightest gust and they will pull towards ground
[21:57] <sbasuita> how much would it cost to set up one of these? http://websdr.ewi.utwente.nl:8901/
[21:57] <rjharrison> Bath beckons
[21:57] <edmoore> hrm, £200 for the adc, fpga and pcb i think
[21:58] <edmoore> and then the rest is some programming
[21:58] <fsphil> and a lot of bandwidth if you want to make it public
[21:58] <edmoore> :)
[21:58] <sbasuita> i was thinking about suggesting one for our school club
[21:58] <fsphil> great idea
[21:58] <sbasuita> which is just restarting after 30 years and looking for equipment
[21:58] <edmoore> it's not an off-the-shelf thing
[21:58] <edmoore> but it may be open
[21:59] <edmoore> that particular page is more of a research project, and a very col one too
[21:59] <edmoore> flex radio is an off the shelf solution that is quite popular
[21:59] <edmoore> http://www.flex-radio.com/
[22:00] <edmoore> obviously pricey
[22:01] <sbasuita> hmmm
[22:01] <sbasuita> i guess you don't really need an sdr for Tx
[22:01] <sbasuita> so if we went for a commercial Tx and Rx being SDR
[22:01] <edmoore> you could look at gnuradio
[22:01] <DanielRichman> sbasuita, I suggest sticking with the standard HAM units they have; have an SDR RX only
[22:02] <sbasuita> DanielRichman: yep
[22:02] <sbasuita> DanielRichman: did you install java yet to check it out? :P
[22:02] <DanielRichman> nah couldn't be bothered
[22:03] <DanielRichman> sbasuita, it's nice to scan the whole band with, but really I don't see the advantages
[22:03] <sbasuita> DanielRichman: seeing the whole band at once is the advantage
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[22:14] <rjharrison> BTW sbasuita you need a licence top operate a repeater too...
[22:16] <russss> I have a USRP here which I rarely use. If anyone wants to borrow it I am not aversed to that.
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[22:16] <russss> I'm going to sell it to the london hackspace when I can justify spending the money.
[22:17] <sbasuita> russss: thanks for the offer, but we're not back at school till september now
[22:18] <sbasuita> russss: what do you think of the gnuradio/usrp system in general?
[22:18] <edmoore> russss: oooooooooooooooooooooooooooooo
[22:18] <edmoore> which is to say, ooooooooooooooooooooooooo
[22:18] <russss> I think it's poorly documented
[22:18] <fsphil> russss, which daughterboards?
[22:18] <russss> edmoore: I apologise if I hadn't mentioned that before ;)
[22:18] <russss> I have the TVRX and the DBSRX
[22:18] <edmoore> can i put my name down on the *very interested* list?
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[22:21] <Laurenceb> hello
[22:21] <Randomskk> yo
[22:21] Action: Laurenceb is working on pitot tube sensors
[22:21] <Laurenceb> yet more stuff for this board :P
[22:21] <Laurenceb> its going to end up with absolutely everything you could ever want
[22:21] <russss> sbasuita: as for gnu radio, I find it chronically undocumented.
[22:22] <Laurenceb> russss: true
[22:22] <sbasuita> hmm
[22:22] <edmoore> Laurenceb: just got a fluke pressure calibrator
[22:22] <edmoore> t's excellent
[22:22] <Laurenceb> neat
[22:22] <Laurenceb> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=26PC01SMT&x=0&y=0
[22:22] <edmoore> used it on our pitots
[22:22] <Laurenceb> thats what I'm thinking of going for
[22:22] <SpeedEvil> Laurenceb: I forgot - what were you wanting that ADC for?
[22:22] <Laurenceb> you have pitots?
[22:22] <Laurenceb> tell tell
[22:22] <russss> I haven't really spent much time looking into coding DSP, but I've done a lot of plumbing with gnu radio and some documentation would have been most appreciated.
[22:23] <edmoore> uhuh
[22:23] <Laurenceb> edmoore: what sensors are you using?
[22:23] <Laurenceb> SpeedEvil: for digitising pitot sensor output
[22:23] <edmoore> well, we use an instrumentation grade static sensor, and a more conventional differential like the one you just linked to
[22:24] <edmoore> let me grab you the actual name
[22:24] <Laurenceb> I think you linked the instrumentation one a while back
[22:24] <Laurenceb> whats the differential one
[22:24] <Laurenceb> thanks
[22:24] <sbasuita> russss: how much does it cost to buy into a gnu radio with hf rx?
[22:24] <edmoore> yeah it was that one i inked to
[22:24] <Laurenceb> edmoore: seen sensortechnics webstore?
[22:24] <edmoore> yes
[22:25] <Laurenceb> tis nice, I hear the qinetiq zephyr uses one of their sensors
[22:25] <Laurenceb> for pitot
[22:25] <russss> sbasuita: HF? I think the HF RX daughterboard is pretty cheap
[22:25] <Laurenceb> SpeedEvil: LTC2481
[22:25] <Laurenceb> is what I was thinking
[22:25] <edmoore> i can't find the differential one off the top of my head
[22:26] <edmoore> or rather, inside my mess of a file structure
[22:26] <russss> LFRX. Is $75
[22:26] <edmoore> HF shouldn't be too bad as you can just sample the whole lot directly and get the primary images :)
[22:27] <russss> yeah
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[22:28] <edmoore> Laurenceb: http://uk.farnell.com/jsp/search/productdetail.jsp?CMP=i-ddd7-00001003&sku=731742
[22:28] <rjharrison> Humm hap pics all look the same after a while
[22:28] <Laurenceb> the problem with differential pressure sensors is they are either a pain to source, expensive, or huge or a pain to interface
[22:28] <rjharrison> hab
[22:29] <Laurenceb> ah one of those
[22:29] Action: Laurenceb didnt like the tube attachment arrangement
[22:29] <SpeedEvil> Laurenceb: you've looked at AD?
[22:29] <Laurenceb> the honeywell digital output ones are sweet, but noone has them
[22:29] <edmoore> rjharrison: agree
[22:29] <Laurenceb> SpeedEvil: yes, nothing thatd do it with a single IC
[22:29] <SpeedEvil> They have 24 bit ADCs@1KHz for $8@1k
[22:30] <Laurenceb> yes but not I2C
[22:30] <Laurenceb> and I dont want 1K
[22:30] <Laurenceb> also a temperature sensor built in is very handy
[22:30] <Laurenceb> bbl
[22:30] Action: Drogba Discounts!! Our Special Limited Time Offers Up To May,22!!!New BranD!! Notebooks,Plasma and LCD TV's.Buy your electronic needs at our unique prices. Laptop Sony VAIO® VGN-FW590FFD-575,57$!!!Apple MacBook® Air MC234LL/A-695,27$!!! http://www.elplace.com/
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[23:03] <Laurenceb> edmoore: how predictable is the temperature drift on that sensor?
[23:05] <Laurenceb> as in is it repeatable? have you tried calibrating?
[23:05] <Laurenceb> I read a few app notes suggesting the temp drift isnt 100% repeatable
[23:09] <Laurenceb> bbl
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[23:28] <fuzzylugnuts> HEy
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[00:00] --- Sun May 16 2010