highaltitude.log.20121011

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[00:02] <DrLuke> http://websdr.ewi.utwente.nl:8901/
[00:02] <DrLuke> sweeeet
[00:02] <DrLuke> good way to play around with SDR without actually buying one :)
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[05:05] <KT5TK> jcoxon, pingpong. Sorry I saw tis several hours later what's up?
[05:09] <griffonbot> @SandroRazciel: Went to my homie's Bass recital and he killed it! Great job Mike! #recital #music #bass #cusf #classicalmusi http://t.co/YTB3LLzW [http://twitter.com/SandroRazciel/status/256260125508124672]
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[05:39] <jcoxon> hey KT5TK - was just getting in contact to ask about your pico flight
[05:43] <jonsowman> good god
[05:43] <jonsowman> whose idea was it to launch at this time?
[05:43] <jonsowman> :|
[05:43] <jcoxon> haha
[05:44] <juxta> hey jonsowman, jcoxon
[05:44] <jcoxon> juxta, !
[05:44] <jcoxon> long time...
[05:44] <jonsowman> helllo juxta
[05:45] <jonsowman> yeah haven't seen you on here in ages
[05:45] <juxta> alas, real life!
[05:45] <jonsowman> not sure what that is yet
[05:46] <juxta> how are things with you guys? isn't it awfully early in the UK right now?
[05:46] <jonsowman> don't remind me
[05:46] <jonsowman> at the launch site. fingers extremely cold
[05:47] <juxta> oh dear
[05:47] <juxta> hehe
[05:47] <jonsowman> i wonder if I can claim plastic surgery for finger reconstruction after losing them to frostbite on CUSF expenses
[05:47] <griffonbot> @cuspaceflight: At the launch site, waiting for other team members and setting up filling kit. #ukhas #nova24 [http://twitter.com/cuspaceflight/status/256269860806459392]
[05:47] <juxta> I was hoping to pick your brain re the times NOAA publish datasets, but if you're preparing to launch, perhaps later on
[05:48] <jonsowman> juxta: it's roughly 5 hours after the model run
[05:48] <jonsowman> so the 06z model is released at about 11z
[05:48] <Darkside> hrm
[05:48] <jonsowman> though sometimes a bit later, and sometimes never
[05:48] <jonsowman> just for fun
[05:48] <Darkside> how long between the latest wind data coming in, and that being reflected in the model though?
[05:48] <juxta> yeah, that's what I had in my crontab for the hourly predictor, just wanted to check
[05:48] <jonsowman> the model is run for the latest data
[05:49] <jonsowman> its continuously updated on their servers
[05:49] <jonsowman> the model reflects the current state
[05:49] <jonsowman> so the best we can do is be 5 hours behind
[05:49] <Darkside> damn
[05:49] <jonsowman> worst is 11 hours just before a new publish
[05:49] <Darkside> well thats a pain
[05:49] <Darkside> i wonder if there are local models available..
[05:50] <juxta> it's not too bad though, it's always given us reasonable performance
[05:52] <juxta> Darkside: there's another model too, a successor to GFS - I forget the name though
[05:53] <Darkside> we can get GRIB models from the BOM
[05:53] <Darkside> which will give us wind data
[05:53] <Darkside> http://www.bom.gov.au/nwp/doc/access/NWPData.shtml
[05:54] <juxta> for $1000+/year
[05:54] <Darkside> hah
[05:54] <Darkside> damn
[05:54] <Darkside> i think they allow access for research work
[05:55] <juxta> I wonder how often they update their data
[05:56] <juxta> and if it's worth the effort of writing a new grabber
[05:56] <Darkside> often
[05:56] <Darkside> every 3 hours i think
[05:56] <Darkside> but we wouldn't get GFS files out of them
[05:56] <Darkside> we'd have to write a translator for the grb files or whatever we get
[05:56] <Darkside> one of my supervisors other students is using some of these models for radio propagation research
[05:56] <juxta> pretty sure the input the prediector takes is a custom format
[05:56] <juxta> predictor*
[05:57] <juxta> but I could be wrong - jonsowman?
[05:58] <Darkside> ok im heading home..
[05:58] <Darkside> bbl
[05:59] <Darkside> i might drop into the metrocentre and see if i can get a metrocard
[06:04] <KT5TK> jcoxon: Good morning! I have some pics from my pico flight here http://tkrahn.dyndns.org/gallery2/main.php?g2_itemId=7399&g2_page=4 and fast forward to the last 2 pages.
[06:05] <KT5TK> Landed in a 10-15 m high pine tree
[06:05] <KT5TK> One of my friends will try and climb it on Friday (with gear)
[06:06] <jcoxon> where you aiminig for duration or altitude?
[06:07] <KT5TK> more for fun, but long term goal is duration.
[06:07] <jcoxon> cool
[06:07] <jcoxon> we're getting a good volume of data regarding these flights
[06:08] <KT5TK> I got the last He on Friday morning for that weekend from the party shop
[06:08] <KT5TK> The woman behind me didn't get any thing...
[06:08] <jcoxon> nice thing about picos is that you need so little
[06:09] <KT5TK> They first asked only for $1 per balloon
[06:09] <KT5TK> Then the shop patron noticed that those are really big balloons and asked for $2 each
[06:10] <KT5TK> which was still fine for me...
[06:10] <jcoxon> in comparison :-)
[06:10] <jcoxon> i think the key is a single balloon system
[06:10] <jcoxon> and a very slow ascent rate
[06:10] <KT5TK> In Alaska they asked for $14 for one single 92 cm fill
[06:11] <jcoxon> i've got a disposable party canister
[06:11] <jcoxon> done 3 launches off it
[06:11] <KT5TK> I thought about that for some time.
[06:11] <jcoxon> cost me ?30
[06:11] <jcoxon> not bad for quite a lot of fun :-)
[06:11] <KT5TK> A single 92 doesn't have enough lift for my pecan and a 9V block
[06:12] <KT5TK> No disposable canisters available in the shops anymore here...
[06:12] <jcoxon> switch to H2?
[06:13] <KT5TK> Then I need to rent or buy a cylinder
[06:13] <KT5TK> The party shop is just around the corner.
[06:13] <KT5TK> as long as I get He there I'm fine
[06:14] <KT5TK> Just filled two more 92cm mylars this morning
[06:14] <KT5TK> to be prepared for saturday
[06:14] <KT5TK> in case the weather is good
[06:14] <costyn> cusf launch today?
[06:17] <jcoxon> KT5TK, check this out
[06:17] <jcoxon> http://handley.org.uk/fzz/?page_id=66
[06:17] <KT5TK> my next version of Pecan will have a boost regulator. Then a single 92cm mylar is feasible
[06:17] <jonsowman> costyn: yep
[06:17] <jonsowman> setting up atm
[06:20] <KT5TK> jcoxon: Yes, thought about generating my own hydrogen already. Didn't want to try this at the party though...
[06:22] <KT5TK> how about starting a column for the free lift in the table?
[06:23] <KT5TK> that's a pretty easy and reliable measurement
[06:26] <costyn> jonsowman: nice, didn't see anything on the mailing list about it. whats the payload/balloon configuration?
[06:27] <jcoxon> KT5TK, good idea
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[06:29] <jonsowman> costyn: there was a mailing list email
[06:29] <jonsowman> choose wombat/joey from dl-fldigi
[06:29] <jonsowman> 434.000 and 434.630 rspectively
[06:33] <costyn> jonsowman: ah was still one of my (list of) unread mails
[06:34] <fsphil> ooh, I must remember to leave the radio on
[06:34] <jonsowman> yes please fsphil
[06:34] <jonsowman> :D
[06:43] <KT5TK> jcoxon: Free Neck lift column done
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[07:00] <jonsowman> lotsof local qrm
[07:00] <jonsowman> :(
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[07:04] <griffonbot> @ChurchillCol: RT @cuspaceflight: Nova 24 will be launching 9am tomorrow from Churchill College. #ukhas #cusf [http://twitter.com/ChurchillCol/status/256289149324247040]
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[07:15] <griffonbot> @jonsowman: Nova 24 launch! Wombat 434.000 and Joey 434.630 #cusf #ukhas [http://twitter.com/jonsowman/status/256292021847875586]
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[07:25] <fsphil> all quiet on 434mhz here today
[07:25] <fsphil> too early I guess
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[07:26] <fsphil> very heavy rain here, be interesting to see if that nulls the signal any
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[07:34] <RocketBoy> how is 434 for noise - was a bit noisy last time I tried it?
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[07:40] Nick change: number10 -> number10_M0MDB
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[07:44] <number10_M0MDB> lots of drift on wombat
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[07:51] <Randomskk> number10_M0MDB: it has very little insulation ;)
[07:51] <Randomskk> -40C last I heard
[07:53] <fsphil> brr
[07:53] <fsphil> problems with Joey?
[07:53] <fsphil> it's not updating
[07:53] <Randomskk> not sure if anyone's trying to track it
[07:53] <number10_M0MDB> didnt look like much on the picture posted yesterday
[07:53] <Randomskk> number10_M0MDB: yea
[07:53] <Randomskk> that was all it flew with
[07:53] <Randomskk> :P
[07:54] <Randomskk> I think next time I might not bother with insulation at all
[07:54] <Randomskk> it's running off a lipo too
[07:54] <Randomskk> a lipo at -40C
[07:54] <fsphil> amazed that's working at all
[07:54] <Darkside> uh oh
[07:54] <Randomskk> with a switch mode power supply so there's almost no heat being generated
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[07:56] <G7PMO_Kev_> Is Wombat 300 baud, 900 shift, 8none1 on 434?
[07:56] Nick change: LazyLeopard -> LazyL_M0LEP
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[07:56] <fsphil> autoconfigure should set all the rtty parameters
[07:57] <Randomskk> G7PMO_Kev_: that's correct
[07:57] <Randomskk> though it does some 50 baud too
[07:57] <Randomskk> it sends the same packet twice on 50 baud then three or five times on 300, if I remember correctly
[07:57] <G7PMO_Kev_> it should, but A) I dont think autoconfig is setting bits per character and b) i'm getting 300baud of garbage high asci character set characters :)
[07:57] <Randomskk> oh yes
[07:57] <number10_M0MDB> had to swap back to fldigi 3.20.29 - was not displaying telemetry for som reason - and there was an error reported
[07:58] <Randomskk> autoconfig won't set bits per char properly I think
[07:58] <fsphil> incorrect document?
[07:58] <Randomskk> number10_M0MDB: what error? if that's an old beta it won't be able to upload
[07:58] <Randomskk> fsphil: no, dl-fldigi bug
[07:58] <Randomskk> silly somewhat annoying one
[07:58] <G7PMO_Kev_> Randomskk - ahhh, ok
[07:58] <Randomskk> you'll have to set it to ASCII-8 manually
[07:58] <Randomskk> actually I can probably mod it to work for now
[07:58] <fsphil> ah
[07:59] <number10_M0MDB> ok Randomskk I'll check it later
[07:59] <Randomskk> but yea you can just manually set ASCII-8 for now
[07:59] <fsphil> getting some qrm on 434.640
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[07:59] <fsphil> 630*
[07:59] <number10_M0MDB> didnt quite catch the error message before closing
[07:59] <Randomskk> hmm I need to SSH through three machines to get to the couch server
[07:59] <Randomskk> that's annoying
[08:00] <Randomskk> this should be a fun proxy chain
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[08:01] <LazyL_M0LEP> What frequencies are the two payloads on?
[08:02] <Randomskk> wombat is 434.000 (but may have drifted a bit)
[08:02] <Randomskk> joey is 434.630?
[08:02] <Randomskk> something like that, one sec
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[08:03] <G7PMO_Kev_> 434.630 looks very quiet....
[08:03] <Randomskk> yea should be around 434.630
[08:03] <Randomskk> I've updated the wombat thing so it should work in dl-fldigi to set the ASCII-8 stuff
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[08:07] <G7PMO_Kev_> 'auto-mode-switch' in dl-fldigi doesnt seem to be very 'auto'? is it just a manual switch?
[08:08] <DanielRichman> it's about as auto as autoconfigure
[08:08] <DanielRichman> you have to click the button, sure, but it does most of the work for you
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[08:10] <jonsowman> i think joey's antenna may have broken
[08:10] <Randomskk> :(
[08:11] <jonsowman> we keep getting WOIBAT instead of WOMBAT
[08:11] <jonsowman> lol
[08:11] <G7PMO_Kev_> Dan - ta
[08:11] <Randomskk> can you not hear joey at all?
[08:11] <jonsowman> nothing
[08:11] <Randomskk> :(
[08:11] <Randomskk> weird
[08:11] <Randomskk> reckon the antenna broke last time the case was used?
[08:11] <LazyL_M0LEP> Nothing RTTY heard between .600 and .660
[08:11] <fsphil> I think I'm seeing wombat
[08:11] <jonsowman> i think so Randomskk
[08:12] <jonsowman> just getting batts
[08:12] <Randomskk> jonsowman: that's a bummer
[08:12] <Randomskk> okay cool
[08:12] <Randomskk> fsphil: wow, really
[08:12] <fsphil> difficult to tell, there's some qrm too
[08:12] <Randomskk> looks like wombat has warmed up a little
[08:12] <fsphil> but it should be on my horizon now
[08:12] <Randomskk> only -30C now
[08:12] <Randomskk> :P
[08:12] <Randomskk> 20k. we reckon about 31k burst
[08:12] <Randomskk> 1000g totex
[08:13] <fsphil> aah the old classic
[08:13] <Randomskk> yup
[08:13] <Randomskk> from the good old days
[08:13] <Randomskk> when balloons were balloons and bursts happened when you expected
[08:13] <fsphil> how far from 434 is wombat
[08:13] <fsphil> ?
[08:13] <Randomskk> not sure. I'm sitting in a basement lab idling time until my 10 meeting. anyone?
[08:13] <fsphil> funfun
[08:14] <number10_M0MDB> 434.994
[08:14] <fsphil> oh I was well off
[08:14] <number10_M0MDB> but is scanner so maybe not accurate fsphil
[08:14] <Randomskk> do you mean 433?
[08:14] <number10_M0MDB> yes sorry 433
[08:14] <Randomskk> wombat is set to 434.000.000
[08:14] <Randomskk> oh that's not so awful
[08:14] <Randomskk> given -30C
[08:14] <Randomskk> I don't think I ever managed to test that low
[08:14] <Randomskk> so anyone who wants to talk shit about lipos not working in the cold
[08:14] <Randomskk> form an orderly queue
[08:15] <fsphil> he's a witch! burn him! but stand back as the lipo might explode
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[08:16] <navrac_work> They work for discharging......
[08:17] <Randomskk> I guess I'm not so fussed about charging them but it could be a legit concern for solar stuff :P
[08:17] <navrac_work> nothing with joey here and given wombat is so strong even with a tiny bit of antenna I'd have thought I'd hear something from joey
[08:17] <Randomskk> :( I guess joey's antenna is broken then, or something
[08:18] <LazyL_M0LEP> Usual problem with wide shift - one end or the other drifts into the receive filter's shoulder before the rig re-tunes...
[08:18] <Randomskk> it had a fairly sad landing last time but seemed to be working
[08:18] <number10_M0MDB> Randomskk: are you not going to recover?
[08:18] <Randomskk> number10_M0MDB: not personally
[08:18] <Randomskk> jonsowman is out chasing
[08:18] <Randomskk> with two other CUSF people
[08:18] <number10_M0MDB> ah ok
[08:18] <Randomskk> but I had a meeting at 10
[08:18] <navrac_work> what is the tx unit on wombat?
[08:18] <Randomskk> so on the one day a week where I have no lectures and no reason to wake up early
[08:18] <Randomskk> up at 0530, launch site at 0610
[08:18] <Randomskk> sigh
[08:18] <Randomskk> navrac_work: ADF7012
[08:18] <Randomskk> 70MHz to 1GHz radio thing
[08:18] <number10_M0MDB> thats too early for a student
[08:19] <Randomskk> with 2FSK at shifts down to like 150Hz or so
[08:19] <fsphil> must unnatural
[08:19] <fsphil> most*
[08:19] <Randomskk> it was still pitch black
[08:19] <Randomskk> stars and moon and stuff
[08:19] <Randomskk> very sad
[08:19] <fsphil> dark and wet at 8am here
[08:20] <fsphil> ah I see a wobbly line
[08:21] <fsphil> 433.997
[08:21] <LazyL_M0LEP> ...and 433.9* is _full_ of random beeps, squeaks and whistles...
[08:21] <Randomskk> yea probably upping the frequency would be a good idea
[08:22] <LazyL_M0LEP> Definitely!
[08:22] <fsphil> not decodes, but it's definitely it
[08:22] <fsphil> 900hz shift
[08:22] <fsphil> no*
[08:22] <Randomskk> might go for 434.100
[08:22] <Randomskk> could drop the shift a bit as well
[08:22] <Randomskk> can't remember why I put it so high
[08:22] <fsphil> 433.900 +/- 100khz is the worst choice I think :)
[08:23] <Randomskk> if it didn't get cut off by the audio passband I think the big shift could make it easier to decode
[08:25] <cuddykid> live predictor not running?
[08:26] <Randomskk> hmm nope
[08:26] <navrac_work> we should all put our unusable frequencies as a reply to a post on the mailing list so we can see what frequencies are universally best
[08:26] <Randomskk> wish I could remember how to make it work
[08:26] <cuddykid> :)
[08:27] <cuddykid> Randomskk: is that Upu's domain?
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[08:28] <LazyL_M0LEP> Yeah, but when the frequency's drifting a lot the wide shift seems to give dl-fldigi's auto-retune trouble.
[08:29] <Randomskk> cuddykid: spacenear.us? no, natrium42
[08:29] <Randomskk> LazyL_M0LEP: yea. though I think an improved auto-retune would help with that
[08:29] <Randomskk> there's a python script I wrote once that tracks it continuously with feedback
[08:29] <Randomskk> which worked pretty well
[08:29] <cuddykid> Randomskk: sorry, meant the live predictor, not web domain :) like "Upu's responsibility"
[08:30] <cuddykid> bad choice of words haha
[08:30] <LazyL_M0LEP> 900 shift is probably a bit OTT even for 300 baud, though.
[08:30] <Randomskk> cuddykid: oh, right
[08:30] <Randomskk> well upu has access to it
[08:30] <LazyL_M0LEP> Yeah, a continuous tracking re-tune would work better
[08:30] <Randomskk> so do I, from home, where I'm not
[08:30] <Randomskk> some other people do too
[08:30] <cuddykid> ah
[08:31] <Randomskk> LazyL_M0LEP: yea. I was gonna see if I could get that into the next dl-fldigi
[08:31] <LazyL_M0LEP> That would be cool. ;)
[08:32] <fsphil> I tried a slow retuner but it kept interrupting the modem
[08:32] <Randomskk> fsphil: what do you mean by slow?
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[08:32] <Randomskk> the one I had working kept decoding RTTY at 300bd over continuous temperature change from +20 to -10
[08:32] <fsphil> well continuous
[08:32] <Randomskk> but it was retuning the radio in steps so small it didn't affect the decoding
[08:32] <fsphil> every time it retuned the modem seemed to stop decoding for a character
[08:33] <fsphil> I think it's just fldigi resetting the modem
[08:33] <Randomskk> interesting
[08:33] <Randomskk> might be how the retuning is implemented in dl-fldigi
[08:33] <Randomskk> vs the python code
[08:33] <fsphil> yea - I think talking to the radio directly would be better
[08:33] <Randomskk> I think the dl-fldigi one is in the middle of the modem processing code
[08:33] <Randomskk> well the python stuff only used dl-fldigi
[08:33] <Randomskk> it read the current freq from it and told it a new radio freq to tune to
[08:34] <Randomskk> but I think the issue is the current code inside dl-fldigi for retuning runs in the modem thread
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[08:34] <Randomskk> wombat is warming up nicely
[08:34] <Randomskk> -14C
[08:35] <Randomskk> jonsowman: should put the chase car app on
[08:35] <Randomskk> wonder where they are
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[08:38] <navrac_work> coming down fast
[08:38] <Randomskk> oh yea, didn't even notice burst
[08:38] <Randomskk> pretty much expected altitude
[08:38] <Randomskk> 29k ish. a bit shorter than we thought. probably due to a bit of an overfill.
[08:38] <Randomskk> it's always fast at first
[08:39] <Randomskk> 54" parachute though so should slow down nicely
[08:39] <m0psi> hi all, is there a balloon live right now?
[08:39] <Randomskk> yup
[08:39] <navrac_work> suprisingly I didnt loose a packet at burst
[08:39] <m0psi> where can i see it on the web?
[08:40] <Randomskk> m0psi: http://spacenear.us/tracker/
[08:40] <Randomskk> navrac_work: nice.
[08:40] <navrac_work> i normally notice as i get the red bar coming up a lot just at/after
[08:40] <Randomskk> funcube?
[08:40] <navrac_work> funcube plus hab amp
[08:40] <Randomskk> cool
[08:40] <fsphil> frequency is dropping now
[08:41] <fsphil> oh it's burst
[08:41] <Randomskk> not surprised, it'l be changing temperature even quicker
[08:41] <fsphil> that explains that
[08:41] <fsphil> I didn't get any decodes, or even partial decodes
[08:41] <Randomskk> -11C, surprisingly warm
[08:41] <Randomskk> fsphil: :(
[08:41] <Randomskk> you were right on the radio horizon I guess
[08:41] <fsphil> I guess the rain really does matter
[08:41] <navrac_work> to be honest the hab amp only makes a differencewith very very weak signals - the filter isnt strictly necessary round here- only farms and fields so apart from oil tank monitors and house alarms there isnt much rf about
[08:41] <Randomskk> that can't help
[08:41] <Randomskk> navrac_work: handy
[08:41] <fsphil> the filter is a requirement here
[08:42] <fsphil> between broadcast FM and tetra, it's a noisy place
[08:42] <navrac_work> all the noise here is in the passband
[08:42] <Randomskk> down to 20k already. nice quick flight
[08:44] <WillDuckworth> slap bang in the middle of Newmarket i reckon...
[08:44] <WillDuckworth> maybe a bit further south
[08:44] <Randomskk> nah I reckon it's got a long way east to go yet
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[08:44] <Randomskk> check out how far east it drifted on the way up
[08:44] <Randomskk> going through those winds again
[08:44] <Randomskk> and north possibly
[08:44] <Randomskk> at the end
[08:45] <Randomskk> could definitely do with live predictions
[08:46] <Randomskk> well I'd better go. damn, I'm gonna miss all the excitement :P
[08:46] <Randomskk> here's hoping I get wombat back in one piece
[08:46] <Randomskk> bbl
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[08:46] <Randomskk> hmm
[08:46] <Randomskk> navrac and number10 both leaving irc doesn't bode too well
[08:47] <navrac_work> im here
[08:47] <navrac_work> no pie chart on habitat though
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[08:54] <m0psi> i don't know what the weather is like where the balloon is , but it is chucking it down here in Farnham
[08:54] <m0psi> and I think the weather is movin east
[08:55] <navrac_work> dry and sunny here
[08:55] <m0psi> oh, not much longer
[08:55] <m0psi> not a fun finding it when it lands
[08:56] <fsphil> torrential here
[08:56] <m0psi> i guess the weather is not going to get to it in 20min
[08:57] <eroomde> good mooorning
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[08:59] <navrac_work> this one is hard to decode, having to do both 50 and 300
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[09:03] <G7PMO_Kev_> the 50::300 thing sounds like a good idea, but combined withthe frequency drift and trying to do some work, just isnt happening :)
[09:04] <G7PMO_Kev_> Hey Penfold
[09:06] <Penfold> mornin'/
[09:06] <G7PMO_Kev_> hows life?
[09:06] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Newbie questions..."
[09:07] <Penfold> slightly mental :D
[09:07] <navrac_work> im missing the $$$$ off the 50 baud most of the time
[09:07] <navrac_work> whilst getting 100% on the 300
[09:07] <m0psi> a dumb question if i may: on the tracker page, there is a box saying Horus 29. and then "select HORUS" from list". I don't see a list. Is this an upcoming flight?
[09:07] <G7PMO_Kev_> im only trying to decode the 50
[09:08] <navrac_work> good luck with that G7PMO_Kev
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[09:09] <number10> m0psi: horus was a couple of days ago - no one removed it from the title
[09:11] <G7PMO_Kev_> gettng the odd good packet here....
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[09:12] <m0psi> thanks number10
[09:13] <m0psi> do you think RAF boys will be upset if it lands on the base?!
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[09:14] <SamSilver> only if it makes them spill their tea
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[09:14] <number10> the americans use that base
[09:14] <m0psi> y, SR-71 was based there i think
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[09:17] <eroomde> software gps front-end pcb arrived back from fab house
[09:17] <eroomde> just waiting opn a mouser delivery then i'm in business
[09:17] <SpeedEvil> :-)
[09:17] <SpeedEvil> good luck.
[09:18] <number10> that landing is not looking good
[09:18] <m0psi> so, 4000 ft over an airbase, a box coming down on a parachute.
[09:18] <G7PMO_Kev_> :)
[09:19] <G7PMO_Kev_> will they see it on their radar?
[09:19] <eroomde> yes
[09:19] <eroomde> then scream and shout
[09:19] <m0psi> UFO == unidetified flying object
[09:20] <number10> maybe landing in the accomodation area
[09:20] <SpeedEvil> Is it an active base?
[09:20] <number10> yes
[09:20] <eroomde> thetford raf base is where jcoxon's came down once
[09:20] <G7PMO_Kev_> im getting much better decodes over the last coupoe of thousand meters...
[09:21] <G7PMO_Kev_> loosing it now though
[09:21] <eroomde> to the chief shouty man (colonel?)'s annoyance
[09:21] <number10> lol
[09:21] <number10> i think as a student you may have better chance of getting it back
[09:22] <m0psi> so, lakenheath next?
[09:22] <number10> thats a relief that it has cleared it now
[09:22] <rwat> nice show you're putting on - what happened to Joey?
[09:22] <number10> rwat: jonsowman thinks antenna problem
[09:22] <navrac_work> only partials now
[09:22] <eroomde> rwat: do you ever go by the moniker rwas?
[09:23] <navrac_work> gone - over the horizon
[09:23] <G7PMO_Kev_> nice selection of fields for it to land in though
[09:23] <rwat> eroomde: not in this life
[09:23] <G7PMO_Kev_> a scattering of trees in the hedge rows
[09:24] <navrac_work> 8$$$$$$WOMBAT,702,09:21:58,52.37903,0.47858,373,11*87C
[09:24] <eroomde> rwat: or the next?
[09:24] <G7PMO_Kev_> last partial I have is 680, so your 702 trumps me by miles :)
[09:27] <navrac_work> which gives a predicted landing spot of
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[09:28] <navrac_work> 52.383,0.472424
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[09:29] <navrac_work> looks a nice easy spot
[09:29] <G7PMO_Kev_> the 'complex' to the right looks a bit odd?
[09:30] <G7PMO_Kev_> lots of big hoops and mounds?
[09:31] <navrac_work> does look a bit odd - thought it was a pig farm at first, but those mounds...
[09:32] <m0psi> missile base?
[09:32] <m0psi> old
[09:32] <costyn> it's just an empty lot http://goo.gl/maps/KEkZJ
[09:32] <navrac_work> munitions storage oops
[09:32] <costyn> oh wait
[09:33] <costyn> I have no idea what you guys are talking about
[09:33] <costyn> this? http://goo.gl/maps/ilf4F
[09:37] <navrac_work> might have fun getting that back 'Urgent do not cut lock call 238 102 for entry'
[09:37] <m0psi> y, saw that :-)
[09:38] <costyn> did it land inside that compound?
[09:40] <navrac_work> from the predictor and last known height yes
[09:40] <navrac_work> http://www.mod.uk/NR/rdonlyres/8DBB097E-7F21-4035-B3D3-4BFD4B231C32/0/20120710Mildenhall.pdf
[09:40] <costyn> oops
[09:41] <costyn> but in that PDF it looks like it's not in active use
[09:41] <navrac_work> its for sale
[09:42] <costyn> ah
[09:42] <navrac_work> but thaat document does give a handy contact email and phone number
[09:42] <griffonbot> @jonsowman: We have visual on Nova 24 #cusf [http://twitter.com/jonsowman/status/256328957274775552]
[09:42] <eroomde> it's like he's in star trek
[09:43] <eroomde> 'on screen'
[09:43] <Laurenceb> main screen turn on
[09:43] <costyn> Laurenceb: I was waiting for someone to say that
[09:43] <costyn> so what happened to Joey
[09:43] <costyn> ?:
[09:44] <eroomde> we don't yet have a visual on that
[09:45] <navrac_work> I think it might have just overshot the base and landed just past the entrance
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[09:46] <navrac_work> which is still in the compound :-(
[09:47] <navrac_work> so a big pair of bolt cutters and a black car reqd
[09:48] <costyn> hehe
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[09:56] Nick change: soafee-chan -> spacekitteh
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[10:00] <jonsowman> recoevered
[10:00] <jonsowman> footage is amazing
[10:00] <jonsowman> :D
[10:01] <costyn> jonsowman: nice!
[10:01] <m0psi> well done!
[10:01] <costyn> jonsowman: not on military grounds then? :)
[10:02] <m0psi> good reconnaissance mission then? :-)
[10:02] <eroomde> they say the foxes sleep longer during winters at vladivostok
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[10:03] <Laurenceb> http://pastebin.com/QFVdgpax
[10:03] <Laurenceb> meanwhile on irc
[10:04] <jonsowman> costyn: haha nope
[10:04] <jonsowman> very easy recovery
[10:04] <jonsowman> about 10 metres from the road
[10:04] <jonsowman> just walked into the field and picked it up
[10:04] <costyn> jonsowman: everybody here was a bit worried about that old ammunitions storage place
[10:04] <jonsowman> yeah
[10:04] <jonsowman> no it missed everything very nicely
[10:05] <jonsowman> we got a telem packet at 3m altitude so we knew it was fine ;)
[10:05] <costyn> ah :)
[10:05] <eroomde> good stuff all in all
[10:05] <SpeedEvil> :-)
[10:05] <jonsowman> yep, went very well
[10:06] <jonsowman> and to top it all off, we actually launched early
[10:08] <number10> i noticed that :)
[10:08] <number10> thought I had ages to setup
[10:08] <jonsowman> haha sorry
[10:08] <jonsowman> still not sure what was wrong with Joey
[10:09] <jonsowman> it's still transmitting fine
[10:09] <jonsowman> so i think it must be antenna related
[10:09] <number10> did you recruit any new members to cusf jonsowman ?
[10:09] <jonsowman> freshers meeting tomorrow number10
[10:09] <number10> ah - I thought today may have been a treat for any newcommers jonsowman
[10:10] <eroomde> jonsowman: i will be around from lunch tomorrow
[10:10] <jonsowman> number10: sponsor launch, so no
[10:10] <eroomde> duty calls in the morning
[10:10] <jonsowman> eroomde: if you want to come to the freshers talk for pizza etc then you're welcome
[10:10] <jonsowman> 6pm LR4
[10:10] <number10> apologies that the directors have not got back to me here yet jonsowman
[10:10] <jonsowman> no problem number10
[10:10] <jonsowman> no rush
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[10:18] <eroomde> jonsowman: ta
[10:18] <eroomde> may well
[10:18] <eroomde> want to avoid rush hour at all costs
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[10:43] <kokey> I wonder if some of the joy I'm having with garbage data is because of software serial
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[10:44] <kokey> to me it looks a bit like a buffer issue really, I probably am coding something wrong
[10:44] <Darkside> try using not software serial
[10:44] <Darkside> if the problem goes away, it's software serial
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[10:44] <eroomde> http://i.imgur.com/FKHkL.gif
[10:49] <fsphil> software serial is great as long as you don't have to do anything with the data
[10:50] <navrac_work> works for me - as long as you increase the buffer size
[10:51] <costyn> eroomde: :)
[10:52] <costyn> fsphil: is useful for debugging output
[10:54] <eroomde> jonsowman: have we's (you's) any sma edge connectors?
[10:56] <SamSilver> kind of off topic http://handley.org.uk/fzz/?page_id=62
[10:58] <navrac_work> kokey try opening softwareserial.h in the libraries folder and change the line #define _SS_MAX_RX_BUFF 64 to something sensible like 255
[11:04] <zyp> I like how you use the word sensible when it is not clear what is sensible or not
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[11:11] <navrac_work> ok sensible for hab use connected to a gps when its probably tied up transmitting the output and so 654 bytes would be inadequate - does that help?
[11:11] <navrac_work> 64 even
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[11:51] <costyn> eroomde: ever hear of the Keshe Reactor? sounds like a load of horse poopoo to me but just wondering
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[12:07] <jonsowman> eroomde: yes, one
[12:07] <jonsowman> what do you want it for?
[12:10] <Randomskk> jonsowman: my meeting finished at 12.40
[12:10] <Randomskk> lol
[12:10] <Randomskk> then I phoned and neither you nor ed answered your phones
[12:10] <Randomskk> nor replied to my text
[12:10] <Randomskk> eventually made my way back to the lab (am here now) to find everything strung up
[12:10] <jonsowman> yeah phone was on silent and in the car
[12:10] <Randomskk> like a meat freezer
[12:10] <jonsowman> haha
[12:10] <Randomskk> wombat still transmitting too
[12:10] <Randomskk> heck of a battery life on that thing
[12:10] <jonsowman> oh yeah, forgot to turn them off
[12:10] <jonsowman> joey is probably still on too
[12:10] <Randomskk> I reckon ~20hrs
[12:10] <Randomskk> shall I turn joey off then
[12:11] <jonsowman> please
[12:11] <Randomskk> $sponsor happy?
[12:11] <jonsowman> very
[12:11] <Randomskk> I take it the $sponsor item was removed from the payload at recovery and not by high altitude winds?
[12:11] <jonsowman> have you seen the cardboard box on the filing cab by the new computer?
[12:11] <jonsowman> you are correct, we and $sponsor $verb'd the $items
[12:12] <costyn> hehe
[12:12] <Randomskk> joey is off
[12:12] <fsphil> that's $response
[12:12] <eroomde> jonsowman: to solder onto a boar5d
[12:12] <Randomskk> oh my goodness
[12:12] <Randomskk> I just saw the box
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[12:12] <Randomskk> I'm sitting right next to it
[12:12] <jonsowman> lol
[12:12] <Randomskk> so I've only read the label so far
[12:13] <Randomskk> hang on, about to stand up and look inside
[12:13] <Randomskk> oh my god yes
[12:13] <Randomskk> amazing
[12:13] <jonsowman> eroomde: i have one of farnell part 1342651
[12:13] <jonsowman> Randomskk: :D
[12:13] <Randomskk> joey is quite warm btw
[12:13] <jonsowman> idk what happened to joey today, antenna i think
[12:13] <jonsowman> we heard it again as we got near the landing site
[12:13] <Randomskk> yea seems most likely
[12:13] <jonsowman> wombat was perfect tho
[12:14] <Randomskk> probably after the antenna's mistreatment
[12:14] <Randomskk> ikr!
[12:14] <Randomskk> so pleased with my little marsupial
[12:14] <jonsowman> lol
[12:14] <Randomskk> despite no insulation, a lipo battery and -40C
[12:14] <Randomskk> well minimal insulation
[12:14] <Randomskk> finally has a good show
[12:14] <fsphil> I think that's the best a lipo has done
[12:14] <Randomskk> typically the time joey decides to misbehave
[12:14] <jonsowman> new keyboard :D
[12:14] <costyn> Randomskk: nice work then, congrats
[12:14] <Randomskk> jonsowman: oooh nice
[12:14] <Randomskk> costyn: ta :D
[12:15] <Randomskk> this is wombat's 3rd (?) flight
[12:15] <Randomskk> something like that
[12:15] <Randomskk> first flight it still had the VERY unhappy radio PLL so didn't really work very well at all
[12:15] <Randomskk> not while in the air anyway
[12:15] <Randomskk> second flight it was surrounded by gopros and didn't get a GPS lock
[12:15] <Randomskk> this time it was suspended from the load line by itself :P
[12:15] <Randomskk> https://www.dropbox.com/s/p7fu9erfxfvtelg/2012-10-10%2019.18.01.jpg
[12:16] <Randomskk> https://www.dropbox.com/s/wxu1jl6hd94h8vj/2012-10-10%2016.57.48.jpg
[12:16] <Randomskk> and seems to have actually worked
[12:16] <Randomskk> yay
[12:16] <Randomskk> did squirrel work, jonsowman ?
[12:17] <jonsowman> we didn't try it actually
[12:17] <jonsowman> afaik
[12:17] <Randomskk> jonsowman: aww it's a shame all the $items are novelty sized
[12:17] <Randomskk> still
[12:17] <jonsowman> yeah but there are so many of them
[12:17] <Randomskk> this label says there are 100 of them
[12:17] <jonsowman> :|
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[12:18] <fsphil> now I want to know what they are
[12:19] <jonsowman> this keyboard is really nice
[12:19] <jonsowman> :D
[12:19] <Randomskk> jonsowman: just counted
[12:19] <Randomskk> 60
[12:19] <jonsowman> we did eat some
[12:19] <Randomskk> so I guess the box was already used
[12:19] <Randomskk> you mean $verb'd some
[12:19] <Randomskk> :|
[12:19] <jonsowman> ops
[12:19] <jonsowman> oops
[12:20] <Randomskk> I assume you didn't $verb 40 of them
[12:20] <jonsowman> no
[12:20] <jonsowman> we did not
[12:20] <Randomskk> fsphil: it's a lot more exciting if you don't know :P
[12:21] <Randomskk> but I've taken a photo so when I leave this underground lab it'l upload
[12:21] <eroomde> M&Ms?
[12:21] <Randomskk> why are you guessing
[12:21] <eroomde> for the lolz
[12:21] <eroomde> my gps board is in the toaster
[12:21] <Randomskk> nice
[12:22] <Randomskk> we have another random sma end connector in the lab too btw
[12:22] <Randomskk> so you're around today I hear?
[12:22] <eroomde> i did that cool thing i do whereby i forget to order an obscure 0805 capactor, assuming i'll find one in the lab
[12:22] <Randomskk> might be able to dig out a mug. can't remember where I put the third one
[12:22] <eroomde> then i don't find one in the lab
[12:22] <eroomde> and thus testing the board is delayed another 24 hrs
[12:22] <Randomskk> yea.. that's why I always order every single thing
[12:23] <eroomde> well, in general we have lots of stuff
[12:23] <eroomde> eg every single e42 0805 resistor
[12:23] <eroomde> and alsmot all 0805 caps
[12:23] <eroomde> but not 470p
[12:24] <Randomskk> 470p isn't even that uncommon :P
[12:24] <Randomskk> we probably have some here.
[12:24] <Randomskk> 470p 0805?
[12:24] <eroomde> yeah
[12:24] <eroomde> but
[12:24] <Randomskk> oh, buts.
[12:25] <eroomde> am just gonna order some to arrive at work tomorrow
[12:25] <Randomskk> fair
[12:25] <eroomde> and do them on friday eve
[12:25] <eroomde> along with an sma-edge
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[12:28] <number10> did you get any pics of mildenhall jonsowman ?
[12:29] <jonsowman> number10: gopro died just before burst
[12:29] <jonsowman> we're not sure why
[12:29] <number10> shame - maybe zapped by the usaf
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[12:30] <jonsowman> number10: lol
[12:30] <jonsowman> it had a battery backpack
[12:31] <jonsowman> and appears to have drained that battery
[12:31] <jonsowman> but the internal one is still full
[12:35] <Randomskk> number10: did you get WOIBAT instead of WOMBAT often?
[12:35] <Randomskk> navrac_work: same question
[12:35] <mattbrejza> Randomskk: as im sure youre aware 434.0 was a bad choice
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[12:36] <Randomskk> mattbrejza: I stand by it as very easy to remember
[12:36] <Randomskk> and it appears to have worked
[12:36] <Randomskk> even if something a bit higher would have been "better" :P
[12:36] <mattbrejza> yea i barely got any decodes
[12:36] <jonsowman> technically should be 434.04 or higher for 10mW
[12:36] <Randomskk> hmm
[12:37] <number10> Randomskk: at first I couldnt see the decoded data on the new fldigi for quite some time (must check I have latest)..
[12:37] <Randomskk> jonsowman: yes I am technically aware
[12:37] Action: jonsowman feels like steve
[12:37] <Randomskk> number10: probably the encoding setting
[12:37] <Randomskk> needs to be ASCII-8 but for the start of the flight dl-fldigi would have set it to baudot
[12:37] <mattbrejza> also autoconfigure autoconfiugred to 7n1 not 8n1 :/
[12:37] <Randomskk> (if you only saw lots of capital letters being decoded that would be it)
[12:37] <Randomskk> mattbrejza: it didn't autoconfigure to anything
[12:37] <eroomde> jonsowman: you don;t look like him though
[12:37] <Randomskk> it's a dl-fldigi bug
[12:37] <Randomskk> known about
[12:37] <Randomskk> eroomde: not yet
[12:37] <jonsowman> eroomde: lol
[12:38] <Darkside> yep we had that bug at out launch
[12:38] <Darkside> our*
[12:38] <Randomskk> number10: but no WOIBAT?
[12:38] <Darkside> only affected terry's car
[12:38] <number10> didnt have much chance to look after swapping fldigi versions as was in the car Randomskk
[12:38] <navrac_work> oh Sorry Randomskk - no didnt get any woibats but the first sentence at 50hz i quite often got rubbish instead of $$$$wombat - qs if it couldnt keep up with the drift
[12:38] <Darkside> we just set up dl-fldigi manually
[12:38] <navrac_work> 300baud stuff was pretty good on sentence 2-5
[12:38] <jonsowman> navrac_work: yes we got that too
[12:38] <jonsowman> missed the start of sentences every time
[12:38] <mattbrejza> what crystsl did you put on that? in terms of temp ppm?
[12:39] <fsphil> you need to transmit a few 0x00's
[12:39] <fsphil> it seems to sync up better with those than the $'s
[12:39] <fsphil> especially when using 8-bit
[12:39] <navrac_work> drifted by >1khz/min
[12:39] <jonsowman> will try that fsphil, thanks
[12:39] <number10> is that what steve transmits inbetween frames? fsphil
[12:39] <fsphil> I'm not sure number10
[12:39] <jonsowman> navrac_work: the insulation would have made you cry
[12:39] <mattbrejza> any reason for 8n1 over 7n1 Randomskk ?
[12:40] <Randomskk> mattbrejza: very slightly easier to write it or something
[12:40] <jonsowman> because there's not enough redundant information in RTTY
[12:40] <Randomskk> that
[12:40] <eroomde> Randomskk has more character
[12:40] <Randomskk> mattbrejza: meh nothing special
[12:40] <Randomskk> a standard crystal
[12:40] <Randomskk> thanks eroomde
[12:40] <jonsowman> lol
[12:40] <Randomskk> navrac_work: lack of insulation I imagine
[12:40] <navrac_work> not me jonsowman - insulation is dead weight as far as I'm concerned - the less the better. Jiffy bag is ott
[12:40] <mattbrejza> shame the redundancy isnt actually useful either
[12:40] <jonsowman> navrac_work: :D
[12:40] <fsphil> to be honest we should be using UTF-8 these days
[12:40] <fsphil> get with the times
[12:40] <Randomskk> yes, RTTY as we do it has a sub-unity rate
[12:40] <Randomskk> fsphil: I was using utf-8
[12:40] <Randomskk> jeez
[12:41] <fsphil> lol
[12:41] <Randomskk> a code with a rate less than 1 is really bad.
[12:41] <jonsowman> https://dl.dropbox.com/u/62498867/nova24-landing.jpg
[12:41] <mattbrejza> is utf-8 just ascii but grows as it needs it?
[12:41] <Randomskk> mattbrejza: kiiiiiiiiiinda
[12:41] <mattbrejza> thatll do
[12:41] <fsphil> yea sorta
[12:41] <eroomde> look how awesome that payloiad box almost is
[12:41] <eroomde> except there seems to be a gnawed hole in it
[12:42] <Randomskk> good landing
[12:42] <eroomde> who is thew fella?
[12:42] <fsphil> that's much better built than my payload boxes
[12:42] <Randomskk> guy from $sponsor eroomde
[12:42] <eroomde> nice
[12:42] <Randomskk> the gnawed hole looks much better up close
[12:42] <Randomskk> it's an eyehole for a 45-deg-down gopro
[12:42] <Randomskk> with tape around the edges
[12:43] <fsphil> what's the colourful strap for?
[12:43] <Randomskk> strapping
[12:43] <jonsowman> eroomde: i repaired your (bottom) box's antenna cover after the builders ripped it off
[12:43] <fsphil> novel
[12:43] <Randomskk> carries load through the straps rather than box
[12:43] <Randomskk> carabiner at the top and bottom
[12:43] <Randomskk> we attach the line to that
[12:43] <mattbrejza> and the box mid way between the two big boxes?
[12:43] <eroomde> thankl your for repairing me bottom
[12:43] <Randomskk> so can chain as many things as we want
[12:43] <Randomskk> the straps take the load
[12:43] <jonsowman> that's ok eroomde
[12:43] <Randomskk> rather than any attachment points or things
[12:43] <jonsowman> :P
[12:43] <Randomskk> eroomde: the small block of foam is wombat
[12:43] <Randomskk> uh
[12:43] <Randomskk> mattbrejza: *
[12:43] <eroomde> mattbrejza:
[12:43] <fsphil> jonsowman does that keyboard feel as good as it cost? :)
[12:44] <number10> did you ever post a video of superman and his mates Randomskk
[12:44] <jonsowman> fsphil: yeah it is really nice
[12:44] <Randomskk> number10: oh not yet, I shall do
[12:44] <mattbrejza> i see
[12:44] <jonsowman> i admit it was very expensive though
[12:44] <Randomskk> jonsowman: I can't wait to compare it to mine :P
[12:44] <jonsowman> :)
[12:44] <fsphil> I'm afraid to try an expensive keyboard incase it spoils me for all other keyboards
[12:44] <Randomskk> fsphil: yea I've definitely been spoilt
[12:44] <Randomskk> no turning back now
[12:44] <Randomskk> the good news is I expect this one to last a long time
[12:44] <jonsowman> Randomskk: i imagine it'll be mostly the same since they're also cherry mx blue switches
[12:44] <Randomskk> I expect it to be identical :P
[12:44] <Randomskk> ugh nearly 2pm!!
[12:45] <Randomskk> I'd better get back. gotta make this presentation....
[12:45] <eroomde> term!
[12:45] <eroomde> what week is it?
[12:45] <jonsowman> 2
[12:45] <Randomskk> week 2 now
[12:45] <Randomskk> (!!!!)
[12:45] <Randomskk> not sure how that happened
[12:45] <Randomskk> ugh
[12:45] <Randomskk> had a 3hr project meeting this morning
[12:45] <Randomskk> looks like I'm to get a desk in the plant sciences dept to spend my afternoons
[12:45] <eroomde> 1/4 of the way through to your mid-way report
[12:45] <Randomskk> just when I thought I'd have time this year
[12:45] <costyn> wombat's antenna is also chainlinked it looks like?
[12:45] <Randomskk> don't say things like that
[12:45] <Randomskk> costyn: oh in the end we did tape the cord to the antenna but it's not in the load really
[12:46] <costyn> Randomskk: ok, but seems like a clever way to keep it pointing down :)
[12:46] <Randomskk> the weight mostly did that for it
[12:46] <Randomskk> but yea
[12:46] <Randomskk> the tape was to stop it sliding really I think
[12:46] <costyn> yea, not really that useful in a single payload launch, but here it's nice
[12:46] <Randomskk> if it's taped to the line then it will swing a lot with the bottom payload
[12:46] <Randomskk> so stays nearly-down
[12:46] <Randomskk> but not quite
[12:46] <Randomskk> would rather have had the antenna free under its own weight - would have swung less
[12:46] <Randomskk> didn't matter as it happens
[12:46] <costyn> i see
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[12:54] <mattbrejza> oh its the apex antenna
[12:54] <jonsowman> lol
[12:54] <jonsowman> yes
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[13:02] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Launch Announcement - XABEN 35"
[13:05] <eroomde> approximately finished
[13:05] <eroomde> will be once farnell delivers what i forgot to order yesterday
[13:05] <eroomde> http://i.imgur.com/SVLHQ.jpg
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[13:06] <Laurenceb> ah, maxim
[13:06] <Laurenceb> to fpga?
[13:06] <Darkside> HORRIBLE MICROSTRIP
[13:07] <eroomde> thankls Darkside
[13:07] <Darkside> sorry :P
[13:07] <eroomde> Laurenceb: to signal analyser
[13:07] <cuddykid> crazy wait on the phone to bonza balloons&. argh
[13:07] <Laurenceb> eroomde: is it digital output?
[13:08] <mattbrejza> some of maxims gps stuff is one bit digital out
[13:08] <eroomde> yep
[13:08] <eroomde> this is n-bits digital out
[13:08] <Laurenceb> ok
[13:08] <eroomde> 2 bits in both i and q or 3 bits in just I
[13:08] <Laurenceb> so whats looking at the data?
[13:08] <eroomde> the latter being what i'll start off with
[13:08] <eroomde> my signal analyser
[13:08] <cuddykid> WillDuckworth: hiya
[13:08] <eroomde> that will save 10B samples in a file
[13:08] <Laurenceb> which is just a data grabber?
[13:08] <Laurenceb> ah
[13:08] <eroomde> which will then go into the numpy receiver
[13:09] <Laurenceb> awesome
[13:09] <eroomde> this board exsists solely to get us some data
[13:09] <eroomde> cheaper than those usb sige samplers
[13:09] <eroomde> it's not intended for flight or anything
[13:09] <cuddykid> WillDuckworth: I've had a think - and can't really see any reason why you can't tag on this launch :) - do you know the weight of your payload?
[13:09] <mattbrejza> is the sample rate of the rtl dongles enough for this or is the perfomance worse?
[13:11] <eroomde> sample rate is a bit low
[13:11] <eroomde> and xtals are v cheap
[13:11] <eroomde> which puts a lot of phase noise in
[13:12] <eroomde> that said, probably good enough to just get me a few mins of data to try out
[13:12] <eroomde> but want to learn this chip anyway
[13:12] <Laurenceb> sounds fun
[13:12] <eroomde> as intended it to use in em,bessed hardware on the rocket
[13:12] <eroomde> embedded*
[13:12] <mattbrejza> yea might as well skip to a proper gps front end
[13:13] <eroomde> indeedey
[13:13] <griffonbot> @cuspaceflight: Thanks to everyone who helped in the tracking of Nova 24, successful launch & recovery. #cusf #ukhas [http://twitter.com/cuspaceflight/status/256382058593669121]
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[13:17] <griffonbot> Received email: navrac "Re: [UKHAS] Launch Announcement - XABEN 35"
[13:22] <jonsowman> sorry about the redaction, but: https://dl.dropbox.com/u/62498867/burst.png
[13:24] <WillDuckworth> hey cuddykid, thanks but - it's shnot ready yet
[13:24] <G7PMO_Kev_> :)
[13:24] <cuddykid> WillDuckworth: ah ok :) will it be ready by sat?
[13:24] <G7PMO_Kev_> does your sponor not want publicity jonsowman :)
[13:24] <jonsowman> G7PMO_Kev_: yes, but on their own terms
[13:24] <G7PMO_Kev_> kk
[13:25] <jonsowman> we can probably release it eventually, just not yet
[13:25] <WillDuckworth> i don't think so ad - do you need any kit?
[13:26] <number10> nice pic jonsowman
[13:26] <jonsowman> :)
[13:27] <navrac_work> looks more like a burlesque dancers bra
[13:27] <jonsowman> lol
[13:27] <cuddykid> WillDuckworth: no probs - urm, possibly the filler adapter, I'll let you know :) thanks
[13:30] <G7PMO_Kev_> guys, notam form, does it have to be a 1:50,000 Landranger OS Map and if so are they online anywhere?
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[13:32] <cuddykid> G7PMO_Kev_: hmm, probably - I don't think it's like if you haven't got the right map he can't find you :) should be good
[13:33] <G7PMO_Kev_> cool
[13:33] <G7PMO_Kev_> im trying to decide on a luaunch site....
[13:34] <G7PMO_Kev_> find a nice quiet local park out in a nearby village seems like a good option?
[13:34] <G7PMO_Kev_> I could talk nicely to CUSF, but it's an hours drive away from me, and if the balloon keeps going further away thats going to be a long drive home!
[13:36] <jonsowman> we're here if you need us G7PMO_Kev_
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[13:39] <number10> if you find a location G7PMO_Kev_ let me know and I'll take a snip of the map for you
[13:43] <G7PMO_Kev_> Thanks guys. Jonsowman - re launching from CUSF, do you normally get involved, or just say 'the site is there'? Some help for a first launch would be on one hand a little intimidating, on the other would improve the chances of a good launch rather significantly :)
[13:43] <jonsowman> G7PMO_Kev_: oh we'll be there to help out :)
[13:43] <jonsowman> we have to for NOTAM reasons anyway, but we'll give you a hand with filling and launching
[13:44] <jonsowman> we only have to be onsite as far the NOTAM is concerned, so we can give you as little or as much help as you like
[13:45] <G7PMO_Kev_> ok, ta
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[13:50] <G7PMO_Kev_> Are there requirements about distance from an airfield etc? I noticed that CUSF NOTAM almost entirley engulfs Cambridge ATZ :)
[13:50] <jonsowman> it depends what David Miller had for breakfast
[13:51] <gonzo__> I have been emailing to get some info on this from him. Zero repklies to anything from anyone in caa
[13:51] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] Launch Announcement - XABEN 35"
[13:53] <G7PMO_Kev_> gonzo - great :(
[13:53] <G7PMO_Kev_> Telephone: 020 7453 6585 apparantly...
[13:54] <mattbrejza> surely stabilising the rfm22b is just a case of replacing the crystal with something better?
[13:54] <eroomde> which radiometrix unit did steve just fly in xaben?
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[13:55] <mattbrejza> LMT2
[13:56] <G7PMO_Kev_> https://maps.google.co.uk/maps?ll=52.356421,-0.704879&z=19 - thoughts?
[13:56] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Launch Announcement - XABEN 35"
[14:05] <navrac_work> mattbrejza - yep just stick on a tcxo and its all good. The trick is to get it so we can run dominoex or similar on 1.8v using as little current as possible and stable. I can do 2 out of any of the 3 - - laurenceb is looking at getting 3/3
[14:05] <mattbrejza> so this isnt stabilising to the same amount as the ntx2 its gps stabilising?
[14:06] <mattbrejza> or is that something else?
[14:06] <mattbrejza> to compare with the ntx2 just a crystal with a better temperature ppm figure would do rather than a tcxo?
[14:06] <navrac_work> ive done locking it to the gps - but that needs 3v3 and takes 10mA
[14:07] <mattbrejza> ok
[14:07] <navrac_work> ive done txco and thats cheap
[14:07] <navrac_work> ive done vctxco and thats cheap too
[14:08] <eroomde> so do you think vctcxo has enough leighway to do mfsk modes?
[14:08] <mattbrejza> the VC bit - just use a varactor on a standard crystal
[14:08] <navrac_work> so I'm now trying a better xtal and pulling it with a varicap as currently the vctxco's are too sensitive and any noise mucks the shift up
[14:08] <mattbrejza> i havnt had any noise issues with standard XLs and VCOs
[14:09] <navrac_work> thats what i'm trying - but to remove ripple you need a sharp filter off the pwm otherwise it wobbles a bit
[14:10] <mattbrejza> ive managed to do that fine, may just need to play with component values
[14:10] <Laurenceb> i dont think vctcxo will work for mfsk
[14:10] <eroomde> we sort of need a whole tx we can design to our own spec
[14:10] <navrac_work> at 432mhz and a desired shift of 15.6Hz makes it a tiny ppnm change
[14:10] <Laurenceb> it will drift too much with temperature
[14:10] <mattbrejza> what frequency change do you get max?
[14:10] <mattbrejza> eroomde: time to rewrite fldigi
[14:10] <Laurenceb> but if you have a kalman filter to track its behaviour...
[14:10] <eroomde> now there are enough of us, certification might not be the loony ott prospect that it was when it was 4 of us, 6 years ago
[14:11] <navrac_work> i dont think so either laurenceb, tried it - not impressed
[14:11] <Laurenceb> yeah
[14:11] <Laurenceb> its not too hard to make a custom vcxo btw
[14:11] <Laurenceb> using an off the shelf xtal
[14:11] <navrac_work> it needs that outer feedback loop to work properly
[14:11] <Laurenceb> and a kalman filter could track the temp drift
[14:11] <Laurenceb> yes
[14:11] <Laurenceb> using gps timepulse
[14:12] <mattbrejza> eroomde: so a non frequency only shift based scheme if you want to make transmitters
[14:12] <mattbrejza> ?
[14:12] <Laurenceb> then varicap to control frequency
[14:12] <Laurenceb> using pwm
[14:12] <navrac_work> thats what im playing with atm - playing around to get 1v =1ppm
[14:12] <Laurenceb> custom vcxo?
[14:12] <mattbrejza> navrac_work: what pull range are you getting?
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[14:13] <navrac_work> i dont know yet, was hoping the 30mhz xtal was going to arrive this morning - the rfm seems fussy about the 30mhz bit - more than a few % off and it ignores it
[14:14] <Laurenceb> thats not nice
[14:14] <Laurenceb> presumably the pll doesnt lock
[14:14] <navrac_work> I tried a 27Mhz crystal and got 32khz out the si4432's gpio2 pin
[14:14] <mattbrejza> also are you more concerned about the crystal frequency drifting with temp or the shift drifting with temp?
[14:14] <navrac_work> so i'd guess it didnt
[14:14] <Laurenceb> shift
[14:15] <mattbrejza> to what extent does it have to be constant? Hz, 10sHz?
[14:15] <mattbrejza> im fairly sure my new transmitter keeps its shift to about 10Hz, but its not properly tested yet
[14:15] <mattbrejza> (i wasnt paying too much attention)
[14:16] <navrac_work> the shift. The original problem was that after stopping txing, when you start again after a few seconds break the rfm drifted wildly which meant you needed a long preamble - which isnt very good for power saving
[14:16] <mattbrejza> you cant keep the crystal going in sleep?
[14:16] <Laurenceb> thats due to xtal
[14:16] <Laurenceb> yes
[14:16] <Laurenceb> but it still drifts
[14:16] <Laurenceb> due to die temperature
[14:16] <mattbrejza> i havnt noticed that with the cc1101
[14:16] <Laurenceb> effecting the built in caps
[14:17] <Laurenceb> cc1101 has external caps
[14:17] <mattbrejza> o i see
[14:17] <navrac_work> this turned out to be weird - even leaving the xtal running, powering up the tx pulled it. however heatsinking the chips reduces the drift a bit
[14:18] <navrac_work> so for small shifts you want to use a varicap
[14:18] <navrac_work> but for the fast switch on you want an externqal oscillator
[14:19] <mattbrejza> fast switch?
[14:19] <navrac_work> so the only wayu of getting both is to use an xtal and adjust the freq in a feedback loop
[14:19] <navrac_work> fast switch to tx without drifting
[14:19] <mattbrejza> or use a different transmiiter
[14:20] <navrac_work> or pulling a crystal thru a gate so it is unaffected by the die temp which might work
[14:20] <navrac_work> well there is always that
[14:21] <navrac_work> but preferably it should be 1.8v which narrows it down to the rfm/si4432 or the new si one
[14:21] <mattbrejza> or cc1101 :P
[14:21] <mattbrejza> (other ICs are availiable)
[14:22] <navrac_work> so im looking at Varicap>crystal>gate and leaving laurenceB to look at the feedback loop as I started reading about kalman filters and my eyes glazed over and i drifted off to sleep
[14:23] <mattbrejza> so is domineox a mode that provides FEC but no datarate improvement?
[14:24] <kokey> cute, http://www.circuits.io/
[14:26] <fsphil> by default it has no FEC
[14:26] <fsphil> that's optional
[14:26] <mattbrejza> but that seems to be the only advantage?
[14:27] <fsphil> it seems to handle noise very well, I guess because of the slow rate
[14:28] <mattbrejza> so increasing the number of tones while reducing the symbol rate, but still keeping the same throughput increases the performance?
[14:28] <mattbrejza> at least in the fldigi implementation
[14:28] <navrac_work> you can add fec, and there is a slight speed improvement - but can be received at lower s/n ratios apparently
[14:29] <kokey> navrac_work: thanks for the software serial buffer tip, I'll give it a go
[14:29] <mattbrejza> well id hope so, otherwise seems a bit pointless
[14:29] <navrac_work> what we need really is a decent dominoex for uhf - 15.6hz steps are a joke at 430meg
[14:29] <kokey> that said I suspect I'll have to move away from softwareserial for the GPS
[14:30] <navrac_work> something with 156Hz steps would be ideal
[14:30] <Laurenceb> mfsk64 is the best
[14:30] <navrac_work> np kokey
[14:39] <griffonbot> Received email: Philip Crump "[UKHAS] Re: Launch Announcement CRAAG1 Pico (11:30am, Wed 10th October)"
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[14:43] <Randomskk> not to fuss or anything, but
[14:43] <Randomskk> no parachute?
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[14:46] <craag> Randomskk: I got the impression that it wasn't really required for pico flights.
[14:46] <craag> I will be adding some sort of one in the future though, if just to make it a little more stable and easy to receive on descent.
[14:48] <Laurenceb> s/stable/steerable
[14:48] <Randomskk> craag: oh I don't think it's required either
[14:48] <Randomskk> I was more poking fun at the response I got from the EMF launch :P
[14:50] <BrainDamage> next time you could hironically put a jericho siren on the payload
[14:50] <BrainDamage> at least they'll see it coming :p
[14:50] <BrainDamage> ( or better, hear )
[14:50] <mfa298> if it managed a couple of days battery could we track it through the postal system ?
[14:52] <craag> mfa298: Yes you could! Although they might not be so happy about something with a red led in it (visible through the bag in the dark).
[14:53] <craag> Randomskk: Ok. Almost everbody lost it on the descent due to the tumbling. Is it normal for them to detach like this often?
[14:55] <gonzo__> I wonder if it split at the neck, or whether it was torn off by the speed of descent after burting somewhere else on the envelope?
[14:55] <craag> Hmm, good point. I'll have to take a look once I get the raw telemetry.
[14:56] <craag> Gotta go.
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[14:58] <navrac_work> All the ones I've heard of just have a big tear across the front when recovered so they tend to come down quite slowly.
[14:58] <navrac_work> the neck is quite sturdy
[15:00] <gonzo__> suspect that it's ok to fly without a chute on a multi balloon pico. As it's probably that balloons will burst independently
[15:01] <SpeedEvil> does anyone have suggestions for really strong, fine wire? I want to try to detach the LCD from a touchscreen
[15:03] <SpeedEvil> hmm. corona wire?
[15:03] <gonzo__> could try a fine spring?
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[15:05] <SpeedEvil> perhaps. don't have any really fine steel wire either
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[15:10] Nick change: soafee-chan -> spacekitteh
[15:20] <craag> Randomskk: How can I download the raw telemetry from my flight?
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[15:24] <Randomskk> craag: can it wait til tonight? basically the web tool to do it is out of action for the time being, the other way is not hard but takes a few minutes that I don't have right now :P
[15:24] <Randomskk> if you read the scrollback/logs for this channel from last night I gave someone else the URL
[15:24] <Randomskk> you just need to put your payload ID in there
[15:24] <Randomskk> (or there's another one for the flight ID)
[15:24] <craag> Randomskk: Ok, I'll take a look for that, thanks!
[15:28] <RG-lz1dev> http://i.imgur.com/XerDB.jpg
[15:28] <RG-lz1dev> apperantly people steal natural gas
[15:29] <russss> heh
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[15:30] <RG-lz1dev> http://news.nationalgeographic.com/news/2005/08/0816_050816_gas_theft.html
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[15:30] <Laurenceb> haha mad
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[15:48] <DrLuke> pretty sad really :(
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[15:56] <navrac_work> I dont know, the way helium prices are going......
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[16:15] <griffonbot> Received email: navrac "Re: [UKHAS] Launch Announcement - XABEN 35"
[16:20] <griffonbot> Received email: Rick Hewett "[UKHAS] Re: Launch Announcement - XABEN 35"
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[16:21] <kokey> the planet '55 Cancri e' is mostly made of diamond and granite
[16:21] <kokey> it's only 40 light years away from earth
[16:21] <kokey> too bad diamonds doesn't have a real value
[16:28] <x-f> too bad even one light year takes us forever
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[16:33] <x-f> with Voyager 1 speed it would be almost three centuries
[16:33] <x-f> then 40 times longer
[16:33] <x-f> ~ forever
[16:33] <x-f> we're stuck.
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[17:10] <gonzo__> could try a fine spring?
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[17:16] <cuddykid> when speaking to bonza balloons earlier they told me that they're no longer accepting new customers due to the helium shortage - not sure why it's taken everyone by surprise all of a sudden
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[18:22] <jcoxon> evening all
[18:23] <SpeedEvil> evening
[18:23] <SamSilver> Hi
[18:23] Nick change: LazyL_M0LEP -> LazyLeopard
[18:23] <SamSilver> tell us some news james
[18:24] <jcoxon> hey SamSilver
[18:25] <jcoxon> well i've got my pegasus VIII gumstix working nicely
[18:25] <jcoxon> currently tx'ing rtty
[18:26] <SamSilver> and the other fancy stuff
[18:26] <SamSilver> was quite a task iirc
[18:27] <jcoxon> the build environment takes a bit of work
[18:27] <jcoxon> especially as its a couple of years old
[18:27] <SamSilver> stripping libs
[18:29] <SamSilver> afk
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[18:40] Nick change: [1]G8KNN-Jon -> G8KNN-Jon
[18:42] <CanadaWest> Good morning.
[18:43] <DrLuke> morning
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[19:01] <WillDuckworth> hey - well done james on the gumstix - it is tricky!
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[19:06] <jcoxon> WillDuckworth, haha indeed
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[19:13] <SpeedEvil> hmm.
[19:13] <SpeedEvil> sort-of-related.
[19:14] <SpeedEvil> just realised Andrews and Arnold may be one of the better providers if you need small data allowance sim
[19:14] <SpeedEvil> 2/month, and 2p/mob
[19:14] <SpeedEvil> Meg
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[19:22] <tioukcom> Ground test of HABuino v1. about 26.5g inc AA cell. Just short of 8 Hrs from AA lithium. http://tiouk.com/tioukcom.php?page=blog&id=8
[19:24] <jcoxon> tioukcom, nice
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[19:29] <tioukcom> Thanks, be interesting to see if it works in the air
[19:29] <jcoxon> should do
[19:29] <jcoxon> what sort of flight you planning?
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[19:30] <tioukcom> probably send it up on a 350g to test it out first, but later hoping to run some experiments with schools
[19:31] <jcoxon> excellent
[19:32] <tioukcom> tested it on 2 AAAs and they got too hot to touch, only lasted 2 hours, but if you need some heat in your container might be an easy way to get it.
[19:33] <jcoxon> tioukcom, seems strange that they got so hot
[19:33] <jcoxon> drawing loads of current?
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[19:35] <tioukcom> They are supposed to be good for an 1.5 amp. HABuino draws 300 to 450 mA on a bench supply.
[19:36] <jcoxon> thats quite a bit
[19:36] <jcoxon> i'd expect an avr payload to draw 120mA
[19:37] <jcoxon> less once its got a gps lock
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[19:38] <tioukcom> Well it has 2 atmega 328p's as it logs to a micro sd card too.
[19:39] <fsphil> the avr ICs are quite low power
[19:39] <fsphil> the biggest power drain should be your gps
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[19:40] <Lunar_Lander> hello
[19:42] <tioukcom> That is the current at 1V from the bench supply, 180mA without the GPS
[19:42] <jcoxon> oh i see
[19:42] <jcoxon> with a boost convertor
[19:42] <tioukcom> tps61200
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[20:21] <Laurenceb_> http://i.imgur.com/5AgyC.jpg
[20:21] <Laurenceb_> wassup
[20:24] Action: SpeedEvil is pondering how to delaminate a nexus 7 screen and touchscreen.
[20:24] <SpeedEvil> and wondering about making a replacement touchscreen,
[20:24] <fsphil> just another bloke in the narwhal
[20:25] <Laurenceb_> why?
[20:25] <SpeedEvil> I have a broken one.
[20:26] <SpeedEvil> and a waterproof tab with a nice thick 'unbreakable' faceplate would be nice.
[20:26] <Laurenceb_> interesting
[20:26] <Laurenceb_> but tricky
[20:27] <SpeedEvil> it would be considerably easier to forget the touchscreen, and fit a track point
[20:34] <CanadaWest> Narwhals animation - http://www.weebls-stuff.com/songs/Narwhals/
[20:34] <CanadaWest> Volume down
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[20:55] <kokey> one thing that I like about OSX, is that since it's FreeBSD, it has the stuff I'm used to on FreeBSD
[20:55] <kokey> like being able to do man ascii
[20:58] <Laurenceb_> watch channel4
[20:58] <fsphil> yea, you wouldn't want any of that girly ascii
[21:07] <kokey> yeah it does appear like it's broken into pieces
[21:07] <kokey> sherlock
[21:15] <W0OTM> I dont think my email made it to UKHAS
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[21:15] <W0OTM> I sent it to ukhas@googlegroups.com
[21:15] <W0OTM> but not sure it made it to the mailing list
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[21:18] <Laurenceb_> i like the 2.4GHz rc kit they were using
[21:18] <jonsowman> W0OTM: groups thinks "Message may be spam"
[21:19] <W0OTM> what that mean?
[21:19] <griffonbot> Received email: chris hillcox "Re: [UKHAS] Newbie questions..."
[21:19] <griffonbot> Received email: W0OTM "[UKHAS] iHAB-8 Launch Annoucement"
[21:19] <jonsowman> messages are all moderated these days, please be patient :)
[21:19] <W0OTM> great, thanks!
[21:19] <W0OTM> im ALWAYS patient :)
[21:20] <W0OTM> jonsowman: thank you!
[21:20] <jonsowman> no problem
[21:20] <jonsowman> :)
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[21:23] <Lunar_Lander> jonsowman, thanks for the info, I was wondering yesterday why the "newbie questions" E-Mail didn't appear when it was announced by griffonbot
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[21:30] <kokey> haha, so I was blaming my serial, and blaming my buffers, etc.
[21:31] <kokey> turns out I was just reading from the ublox before checking for GPS.ready
[21:31] <kokey> I only figured this out once I forced it to filter out the non-printable characters
[21:33] <kokey> any, RTTY working, and reading from the GPS
[21:34] <kokey> except I'm not using any GPS data to send over RTTY
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[22:49] <CanadaWest> My uBlox should be arriving via FedEx any minute now.
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[22:49] <CanadaWest> looking forward to my new toy.
[22:51] <CanadaWest> uBlox LEA-6H
[22:51] <jcoxon> oooo exciting
[22:51] <CanadaWest> just getting started
[22:51] <jcoxon> is it a raw chip or on a breakout board
[22:52] <CanadaWest> It should be on a board.
[22:53] <CanadaWest> bought it as part of a kit for another project I'm doing at the same time. I like reusable components :)
[22:53] <CanadaWest> It will be in my Drone AND in my HAB... :)
[22:54] <jcoxon> ha
[22:55] <CanadaWest> well, obviously not at the same time...
[22:55] <CanadaWest> yet.. ;)
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[23:14] Action: SpeedEvil discovers the sodding ground effect.
[23:14] <SpeedEvil> in bad piggies
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[23:19] <griffonbot> Received email: Steve Aerospace "[UKHAS] LAUNCH ANNOUNCEMENT XABEN-36"
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[00:00] --- Fri Oct 12 2012