[00:00] <jcoxon> natrium42, i've made a 'graph' web page for BH4
[00:00] <jcoxon> at the moment it uses data from my simulator but will adapt it to use the listener server before the launch
[00:01] <natrium42> cool
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[00:15] <Endeavour> Hello
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[04:04] <juxta> hey natrium42
[04:04] <natrium42> yo
[04:04] <juxta> love the pictures show on the tracker :D
[04:05] <juxta> i believe I only have 9600baud GPRS connection at my launch site though :'(
[04:05] <natrium42> eww
[04:06] <natrium42> you can try though
[04:06] <natrium42> it's pretty much set it and forget it
[04:07] <natrium42> would it help to resize them to 320x240 or something?
[04:09] <natrium42> app is here btw --> http://spacenear.us/snapshots/snapshots-0.1.zip
[04:09] <natrium42> right now it's set to resize to 640x480
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[04:28] <juxta> natrium42: I will give it a go
[04:28] <juxta> :)
[04:28] <natrium42> k, let me know if there are ny problems
[04:28] <juxta> looks pretty good btw!
[04:28] <natrium42> only tested it on win7x64
[04:28] <natrium42> thx
[04:29] <juxta> natrium42: do you anticipate anything going wrong with the XML rework/whatever Rob and you have been working on?
[04:29] <natrium42> we won't touch it for these two launches
[04:29] <natrium42> so don't worry
[04:30] <juxta> ah alrighty :)
[04:30] <juxta> I have to go to work now :(
[04:31] <natrium42> haha, have fun :P
[04:31] <juxta> hopefully this time tomorrow I'll be successfully recovering my payload :)
[04:31] <juxta> I dont think we'll lose it though, we have 3 telemetry systems onboard :D
[04:32] <natrium42> radio, cellphone and ?
[04:32] <juxta> radio, SPOT & another radio :)
[04:33] <natrium42> oh, spot, nice :)
[04:33] <natrium42> is it the newer model?
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[08:50] <MikeMc68> morning
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[09:44] <juxta> morning MikeMc68
[09:47] <MikeMc68> morning juxta
[09:48] <juxta> how's your launch coming along MikeMc68?
[09:50] <MikeMc68> like a slug in treacle
[09:51] <juxta> haha
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[10:05] <rjharrison> Hey juxta
[10:05] <rjharrison> I was having a look at your yagi and it looks fantastic
[10:06] <MikeMc68> Where is that? can I have a look please Juxta?
[10:06] <MikeMc68> I was hoping to build a Yagi for James' launch this weekend but haven't had time
[10:07] <rjharrison> You may find that it is better to mount it on the tripod from the rear rather than the middle as it may effect the focusing of the radio signal
[10:07] <rjharrison> Hi MikeMc68
[10:07] <MikeMc68> Hey
[10:07] <rjharrison> One sec here is the line
[10:07] <rjharrison> link
[10:07] <rjharrison> http://projecthorus.org/wp-content/uploads/2009/11/IMG_3004.JPG
[10:08] <rjharrison> Ideally the boom would be a little longer and have the mount point at the rear
[10:10] <juxta> hey rjharrison
[10:10] <MikeMc68> cool
[10:10] <juxta> yeah - it was a little rushed :)
[10:10] <rjharrison> juxta you all set for tonight?
[10:10] <juxta> i will perhaps make another one or improve it at some stage
[10:10] <rjharrison> Or tomorrow as the case may be
[10:10] <juxta> yeah I think so :)
[10:10] <juxta> just at work, brb
[10:10] <MikeMc68> best of luck mate
[10:11] <rjharrison> Juxta steve (aka rocketboy) just has a counter weight he shoves in the back and mounts it to the tripod at that point
[10:11] <rjharrison> juxta what time is it with you?
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[10:31] Action: MikeMc68 pokes juxta
[10:32] <juxta> hey
[10:32] <juxta> sorry, just had to deal with a prize asshole
[10:33] <juxta> it's 9:00pm
[10:34] <MikeMc68> what prize did you give him?
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[10:36] <juxta> heh
[10:41] <Laurenceb> hi
[10:41] <MikeMc68> hi
[10:43] <juxta> rjharrison: next one I will make like in the photo of me with the radar reflector
[10:44] <juxta> PVC pipe and brass rod
[10:44] <juxta> aluminium is fiddly and hard to alter
[10:45] <Laurenceb> its nice to work with unless you are soldering
[10:46] <juxta> Laurenceb: yeah, but I don't have a TIG welder :)
[10:46] <Laurenceb> bolts
[10:46] <juxta> well thats always an option ;p
[10:46] <MikeMc68> have you adapted the spacetracker for your own use?
[10:46] <Laurenceb> or rivets
[10:46] <juxta> rivets are nice
[10:47] <juxta> MikeMc68: natrium42, rjharrison & jcoxon modified it to suit, very nice of them!
[10:48] <MikeMc68> cool
[10:48] <juxta> as it turns out we're going to have 3 chase cars
[10:48] <juxta> (posting their locations on the tracker as well as the payload)
[10:49] <MikeMc68> juxta i have just seen a pic of you for the first time on your site
[10:49] <juxta> haha
[10:49] <MikeMc68> you need a haiarcut
[10:49] <MikeMc68> hair
[10:49] <MikeMc68> lol
[10:49] <juxta> that's for sure
[10:50] <MikeMc68> hehe
[10:50] <MikeMc68> cool site
[10:50] <MikeMc68> lots of useful info. on there
[10:50] <MikeMc68> yeah with the large aareas you may have to cover 3 chase cars sounds sensible
[10:51] <juxta> it'd be good if I had my ham license
[10:51] <juxta> so I could use the radio to talk to the other cars
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[10:51] <juxta> I'm getting my foundations license soon though, hurrah :D
[10:52] <MikeMc68> cool
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[10:58] <juxta> handy as there's a repeater that covers all the area we'd be in
[11:02] <MikeMc68> great
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[11:27] <adhoc> hi juxta
[11:28] <juxta> hey adhoc
[11:28] <adhoc> its still raining in mt barker, hopefully clears up for tomorrow
[11:28] <adhoc> juxta: you are doing the launch tomorrow, right?
[11:29] <juxta> yeah I am adhoc :)
[11:29] <adhoc> i emailed you a couple of days ago
[11:29] <juxta> ahh right :)
[11:29] <juxta> I remember, hehe
[11:29] <adhoc> i was interested in the tracking and mapping stuff
[11:29] <juxta> will you be listening in?
[11:29] <adhoc> i don't have the gear for it ...
[11:30] <adhoc> no SSB on 70cm =/
[11:30] <juxta> ah, oh well :(
[11:30] <juxta> so it's raining in mt barker hey?
[11:30] <adhoc> there are a bunch of things i need to get setup in the shack =)
[11:30] <adhoc> most the way from strath to barker, yes
[11:30] <juxta> I was up there on Sunday and it was nice, went strawberry picking in Hahndorf ;p
[11:31] <adhoc> heh =)
[11:31] <juxta> wait - that was Monday I think
[11:31] <juxta> hopefully it's clear tomorrow
[11:31] <juxta> but we have a shed to work in if not
[11:31] <juxta> http://www.bogaurd.net/launch
[11:32] <adhoc> hows your rig go with cloads?
[11:32] <juxta> clouds shouldnt be too much of a problem I don't think
[11:32] <adhoc> nice shed ;)
[11:32] <juxta> the UK guys probably know how clouds affect things better than anybody ;)
[11:33] <adhoc> thats near the launch site?
[11:33] <juxta> that's where we'll be inflating I think
[11:33] <adhoc> right
[11:33] <juxta> (in the shed)
[11:33] <russss> I don't think clouds really make any difference.
[11:34] <adhoc> not to 430MHz?
[11:34] <adhoc> rain kills our 900MHz ISM gear =/
[11:34] <juxta> adhoc: met band is 401-403 mhz, they launch hundreds of balloons a year, I guess it doesnt boher them ;p
[11:34] <adhoc> and the noise on our 2.4GHz gear goes through the roof =\
[11:35] <adhoc> juxta: fair enough =)
[11:35] <russss> it was cloudy and rainy when we launched ballasthalo3 I think. Still got several hundred km range
[11:35] <juxta> adhoc: do you work with 2.4 networks?
[11:35] <adhoc> a bit
[11:35] <juxta> oh nice :)
[11:35] <adhoc> did a fair bit in london a few years back
[11:36] <adhoc> and ran the wifi + network at linux conf in melbourne a few years back
[11:36] <juxta> :D
[11:36] <adhoc> tinkering with 900MHz now
[11:36] <adhoc> spent a bit of time with airstream when i lived in adelaide...
[11:37] <juxta> ah
[11:37] <juxta> I know seabird2k
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[11:38] <juxta> I was actually hoping he might have been around for the launch, but he's interstate
[11:38] <hsmith> any news of progress towards launch of Ballast Halo 4 from Camb at the weekend?
[11:38] <adhoc> yeah...
[11:43] <adhoc> juxta: well, good luck for the launch tomorrow =)
[11:50] <juxta> cheers adhoc :)
[11:50] <adhoc> else i'd be up for lending a hand on saturday if tomorrow doesn't pan.
[11:50] <adhoc> even if its only weilding a camera =)
[11:50] <juxta> adhoc: in future I might have a space 70cm SSB radio if you want to listen in :)
[11:51] <juxta> hehe - will shoot you an email and let you know how it goes
[11:51] <adhoc> i'm studying for my standard license, and then i will get all the gear for APRS on a couple of bands
[11:51] <adhoc> i'd really like to tinker with packet radio, but its dieing
[11:52] <adhoc> APRS seems to be the replacement
[11:52] <juxta> yeah
[11:52] <juxta> I'm doing this as a LIPD
[11:52] <juxta> as I dont have a license
[11:52] <adhoc> thats LIPD ?
[11:52] <adhoc> whats LIPD ?
[11:53] <juxta> Low Interference Potential Device
[11:53] <adhoc> ah ok
[11:54] <juxta> ISM basically
[11:54] <adhoc> need your standard to do data/digital on the HAM bands
[11:54] <juxta> yeah
[11:54] <adhoc> ok that makes sense
[11:54] <juxta> I thought APRS was advanced
[11:54] <russss> does the australian license give you authority to transmit from aircraft?
[11:54] <juxta> russss: yeah
[11:54] <russss> cool
[11:54] <russss> we can't here. No ships or aircraft.
[11:54] <juxta> :(
[11:55] <juxta> that's a shame
[11:55] <adhoc> erm ... juxta you sure about that?
[11:55] <adhoc> you can on light aircraft
[11:55] <juxta> adhoc: aprs on a balloon I mean
[11:55] <adhoc> but not on commerical airlines....
[11:55] <adhoc> juxta: ah yes =)
[11:55] <russss> yeah, but that's an aviation authority restriction
[11:55] <juxta> I dont mean on a commercial flight of course :P
[11:56] <russss> the amateur license in the UK doesn't allow you to transmit from anything which isn't attached to the ground
[11:56] <adhoc> russss: there are exemptions, right?
[11:56] <russss> I don't believe so
[11:56] <adhoc> like for use of other bands, like 500KHz
[11:57] <juxta> is 500hkz a ham band?
[11:58] <adhoc> 3KHz of it
[11:58] <adhoc> in the UK
[11:58] <juxta> ah okay
[11:58] <adhoc> in VK we have 135-137KHz
[11:58] <adhoc> not sure about 500KHz here
[11:59] <adhoc> 1.8MHz, 3.5KHz, 7MHz, 10MHz, 14Mhz, 18, 21, 24, 28-30 ...
[11:59] <juxta> are you F license adhoc?
[11:59] <adhoc> juxta: yes
[11:59] <juxta> that's what I'll get in a week or two
[11:59] <juxta> hopefully ;p
[12:00] <adhoc> you got the WIA book?
[12:00] <juxta> though from what I've seen it looks straighforward
[12:00] <adhoc> its got everything you need to learn for the exam
[12:00] <adhoc> the exam is not hard if you can read
[12:00] <juxta> not yet, I think there's a handbook being sorted out by another ham for me
[12:00] <adhoc> read it
[12:00] <adhoc> twice. is a sensible read =)
[12:01] <adhoc> and the practical is not hard if you have half a clue =_
[12:01] <adhoc> =
[12:01] <adhoc> =)
[12:01] <adhoc> the only hard part is the first QSO with an instructor, to QSY from one frequency to another.
[12:02] <adhoc> i was quite nervous...
[12:02] <juxta> fair enough
[12:02] <juxta> have you had your license long?
[12:02] <adhoc> 18 months
[12:03] <adhoc> also i went to AHARS before i got my license.
[12:03] <adhoc> its the closest club near me... even though its in blackwood.
[12:04] <juxta> ah
[12:04] <russss> can you believe there are no amateur radio clubs/courses in central London?
[12:04] <adhoc> from the map on your web site, NERC or EARC might be closest to you ...
[12:04] <adhoc> russss: doesn't surprise me =)
[12:05] <russss> gonna try and start some at the hackspace when it gets warmer
[12:08] <MikeMc68> Bromley do them
[12:09] <MikeMc68> not central London but only a short train ride out
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[12:25] <MikeMc68> hey GeekShadow
[12:26] <GeekShadow> hey MikeMc68
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[12:30] <Lunar_Lander> hello
[12:33] <MikeMc68> hey
[12:34] <Lunar_Lander> nice to be here again
[12:36] <MikeMc68> what's new ?
[12:36] <Lunar_Lander> well I'm quite new
[12:37] <Lunar_Lander> I only discovered the Wiki and the IRC yesterday when looking where to get balloons
[12:37] <SpeedEvil> :)
[12:38] <Lunar_Lander> :)
[12:38] <Lunar_Lander> and I am a physics student from Germany and I have a friend who is electrician by profession
[12:39] <Lunar_Lander> and I have considered trying unmanned ballooning
[12:41] <rjharrison> hey juxta I'm going to clear the data down is that ok with you?
[12:41] <rjharrison> You're not running any tests atm?
[12:42] <rjharrison> I assume all testing is complete on the listener/tracker
[12:43] <juxta> rjharrison: yep, no hassles
[12:44] <juxta> rjharrison: was there evern anything on there at the moment?
[12:44] <juxta> Lunar_Lander: where abouts in Germany are you?
[12:49] <rjharrison> Hi Lunar_Lander welcon to highaltitude
[12:50] <rjharrison> If you are really interested in unmanned ballooning then this is the place to be
[12:51] <rjharrison> there is going to be quite a bit of activity over this weekend, if you have a radio you may be able to help track a balloon for us as there is one coming your way
[12:55] <SpeedEvil> A 70cm radio
[12:59] <Lunar_Lander> thank you rjharrison
[12:59] <Lunar_Lander> juxta, I'm from Lower Saxony
[12:59] <Lunar_Lander> and I unfortunately do not have a radio
[13:02] <Lunar_Lander> otherwise I would have been happy to help
[13:05] <Lunar_Lander> I have read the article about ballast systems yesterday
[13:05] <Lunar_Lander> and where there is ballast, there normally should also be a balloon valve
[13:05] <Lunar_Lander> but you can't put a valve into a rubber balloon right?
[13:06] <russss> the balloons we use the ballast with have holes in the bottom
[13:06] <russss> so they don't burst
[13:06] <Lunar_Lander> ah ok
[13:06] <russss> the ballast is used to counteract the loss of helium through the hole
[13:06] <Lunar_Lander> I didn't mean that
[13:06] <Lunar_Lander> ah
[13:07] <Lunar_Lander> I meant a controllable valve to make the balloon descend
[13:07] <russss> descent happens when night falls and the temperature drops
[13:08] <Lunar_Lander> ok
[13:08] <Lunar_Lander> I know that also :)
[13:08] <rjharrison> Lunar_Lander yep that would be good but at the moment we just leave a small hole to continually vent helium
[13:08] <Lunar_Lander> yeah
[13:09] <russss> it's a case of reducing the number of things to go wrong :P
[13:09] <Lunar_Lander> :P yeah
[13:09] <Lunar_Lander> the KISS rule
[13:11] <Lunar_Lander> and you get your balloons from Kaymont?
[13:18] <rjharrison> yep
[13:19] <Lunar_Lander> because the ones from Japan are too expensive in shipping or so?
[13:21] <rjharrison> yep
[13:21] <Lunar_Lander> ah
[13:21] <rjharrison> Kaymont balloons are totex ballons anyhow
[13:22] <rjharrison> They just buy in bulk
[13:22] <Lunar_Lander> ah ok
[13:22] <rjharrison> totex are the Japanise ballons
[13:22] <Lunar_Lander> and the ones from China are too low in quality I assume :P?
[13:22] <Lunar_Lander> yeah
[13:22] <rjharrison> balloons even :)
[13:22] <Lunar_Lander> :)
[13:22] <rjharrison> Yep
[13:22] <Lunar_Lander> and there is one company from India I think
[13:23] <rjharrison> I think the world uses totex balloons military and weather etc..
[13:23] <Lunar_Lander> yeah
[13:23] <rjharrison> Yep I have not heard about thouse
[13:23] <Lunar_Lander> Pawan is the name of the company
[13:24] <rjharrison> http://www.randomsolutions.co.uk/top.htm
[13:24] <rjharrison> This the the UK supplier who is on here quite alot AKA rocketboy
[13:24] <Lunar_Lander> cool, with PayPal
[13:24] <Lunar_Lander> yeah
[13:33] <rjharrison> juxta are right by the cost or at the other location http://www.robertharrison.org/tracker/map.php?height=1200
[13:33] <rjharrison> coast
[13:35] <juxta> rjharrison: ?
[13:35] <rjharrison> ahh the horus data
[13:35] <juxta> ah
[13:35] <juxta> I'm on your tracker ;p
[13:35] <rjharrison> Click on the horus bit in the right hand bar
[13:36] <rjharrison> :)
[13:36] <juxta> i'm about to drive home
[13:36] <juxta> back soon
[13:36] <juxta> yeah I saw
[13:36] <rjharrison> Ok
[13:36] <rjharrison> Basiclly the listener tracks on my traker and spacenear.us
[13:36] <rjharrison> My tracker is a bodged copy of spacenear.us
[13:37] <rjharrison> the height allow you to change the map size to meet the needs of your monitor
[13:40] <rjharrison> juxta do you skype?
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[14:11] <juxta> rjharrison: back
[14:13] <juxta> I've added you on skype ;)
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[14:18] <hsmith> Good luck with Horus. Who's the main man behind the project? (I won't try to track from UK:-(
[15:01] <rjharrison> THanks hsmith
[15:01] <rjharrison> Juxta is the man
[15:02] <hsmith> juxta - ah, thanks ... I am new here, learning
[15:04] <Randomskk> sigh. ten minutes of continuous downloading is enough to use up my entire ten day allowance
[15:04] <Randomskk> ten literay minutes - 600 seconds
[15:04] <Randomskk> literal* even
[15:11] <juxta> hey hsmith
[15:12] <juxta> no worries re the tracking ;)
[15:22] <juxta> alright all, bed time for me
[15:23] <juxta> see you tomorrow perhaps :)
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[16:17] <Lunar_Lander> I see that the next flight is about a ballast system
[16:17] <Lunar_Lander> "BallastHalo 4"
[16:20] <Lunar_Lander> oh, an Atlantic Crossing!
[16:20] <Lunar_Lander> that sounds great
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[16:32] <Lunar_Lander> hi jcoxon
[16:33] <Lunar_Lander> what a coincidence
[16:33] <Lunar_Lander> I just read the Pegasus I report
[16:33] <jcoxon> hey Lunar_Lander
[16:33] <Lunar_Lander> nice to meet you ;)
[16:34] <jcoxon> pegasus 1 was a while ago
[16:34] <Lunar_Lander> yeah
[16:34] <Lunar_Lander> I see that you are up to number 6 now
[16:37] <jcoxon> yeah done quite a few now
[16:37] <Lunar_Lander> did P2 ever come back?
[16:38] <Lunar_Lander> you write that it probably ditched in the North Sea
[16:38] <jcoxon> Lunar_Lander, no it never came back
[16:38] <Lunar_Lander> that's sad to hear
[16:38] <jcoxon> heard nothing after we launched
[16:38] <Lunar_Lander> yeah
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[16:39] <Lunar_Lander> I hope that that geiger counter/dosimeter was not too expensive
[16:39] <Lunar_Lander> as it turned out to be worthless
[16:40] <jcoxon> yeah it was donated - but they said they didn't mind risking it
[16:41] <Lunar_Lander> ah
[16:41] <jcoxon> unfortuantely we are close to the sea, so its always a risk
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[16:41] <Lunar_Lander> of course
[16:42] <jcoxon> it was also back in the early days when we didn't use radios
[16:42] <Lunar_Lander> old James Glaisher had to experience that too
[16:42] <Lunar_Lander> yeah
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[16:43] <Lunar_Lander> as winds are mostly eastward, it would be ideal to launch at the west coast of Holland
[16:44] <Lunar_Lander> then you'd had miles and miles of NL, D and PL
[16:44] <Lunar_Lander> *have
[16:44] <jcoxon> Lunar_Lander, true but you are crossing international borders
[16:44] <Lunar_Lander> yeah
[16:44] <jcoxon> and the rules for that are very unclear
[16:44] <Lunar_Lander> ah ok
[16:45] <jcoxon> it hasn't really been done and i suspect if we were to speak to the various goverment organisations they would firmly say no
[16:45] <Lunar_Lander> Germany seems to be quite restrictive anyway
[16:45] <Lunar_Lander> yeah
[16:45] <Lunar_Lander> I only saw a paper on mass lauches of kid's balloons
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[16:46] <Lunar_Lander> it said things like: "Only Helium, No Solid objects on the balloons, no more than 500 balloons, no bundling of balloons"
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[16:54] <Lunar_Lander> ah Pegasus IV didn't happen
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[16:57] <Lunar_Lander> and now you're going for the Atlantic jcoxon?
[16:57] <jcoxon> a group of us are yes
[16:57] <jcoxon> doing test flights right now
[16:59] <Lunar_Lander> yeah
[16:59] <Lunar_Lander> the BallastHalo series?
[17:00] <jcoxon> yeah
[17:00] <jcoxon> got one ready to fly right now
[17:00] <Lunar_Lander> it seems to work well
[17:00] <Lunar_Lander> yeah
[17:00] <jcoxon> considering saturday launch
[17:00] <jcoxon> but not too sure
[17:00] <jcoxon> still deciding
[17:00] <Lunar_Lander> do you use Iron Dust like they did in the USA in the 1950s?
[17:01] <jcoxon> we use ethanol as the ballast
[17:01] <Lunar_Lander> ah
[17:01] <Lunar_Lander> that is a good idea
[17:01] <Lunar_Lander> it'll vapourize
[17:01] <jcoxon> shouldn't do - even though the pressure is low so is the temperature
[17:01] <jcoxon> so it should remain in liquid form in the tank
[17:02] <Lunar_Lander> I mean after ejecting
[17:03] <Lunar_Lander> so that nothing rains down on Earth
[17:03] <jcoxon> yeah its also dropped in small drops so really shouldn't be too much of an issue
[17:04] <Lunar_Lander> yea
[17:08] <Lunar_Lander> wouldn't you also need a valve in case the balloon gets too high?
[17:08] <SpeedEvil> worst case it bursts
[17:08] <Lunar_Lander> the Japanese Pacific balloon in WWII had a valve and ballast system
[17:08] <Lunar_Lander> yeah
[17:08] <Lunar_Lander> and then it it lost
[17:08] <SpeedEvil> nope
[17:08] <SpeedEvil> it bursts at a - mostly - predictable height - and the GPS and radio payloads let it be recovered
[17:08] <SpeedEvil> o
[17:08] <SpeedEvil> h
[17:09] <SpeedEvil> for the transatlantic attempt - yes.
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[17:09] <SpeedEvil> you don't want to go too high
[17:09] <Lunar_Lander> yes
[17:09] <Lunar_Lander> that I meant
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[17:09] <jcoxon> Lunar_Lander, oh for trans-atlantic we don't use normal balloons
[17:09] <jcoxon> instead use a Zero Pressure balloon
[17:09] <Lunar_Lander> ah
[17:09] <Lunar_Lander> the clear plastic ones?
[17:10] <jcoxon> the ballasthalo flights are a test for the ballast tanks that would be used with the zero pressure
[17:10] <jcoxon> yes
[17:10] <Lunar_Lander> ah
[17:10] <Lunar_Lander> cool!
[17:10] <Lunar_Lander> a friend suggested I should try making a plastic model balloon with a soldering iron
[17:10] <jcoxon> so in some ways the ballast tanks actually shorten the flight
[17:10] <Lunar_Lander> yes
[17:10] <jcoxon> as we have no way of venting the helium
[17:10] <Lunar_Lander> yeah
[17:11] <Lunar_Lander> I had always thought that there cannot be valves in plastic balloons, I was astonished to hear that it is possible
[17:11] <Lunar_Lander> that was when I read up on Manhigh
[17:11] <Lunar_Lander> do you know that?
[17:11] <jcoxon> the one we have doesn't have valve, just is open at the bottom
[17:11] <jcoxon> oh yes i've flown valved ZP balloons with CNES
[17:12] <Lunar_Lander> cool
[17:12] <Lunar_Lander> and you also know Project Manhigh?
[17:12] <jcoxon> yup
[17:12] <Lunar_Lander> cool!
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[17:12] <jcoxon> kittinger
[17:12] <Lunar_Lander> I actually got in contact with Dr. Dave Simons and got a copy of the Manhigh II report
[17:13] <Lunar_Lander> yeah
[17:13] <Lunar_Lander> he was on Manhigh I
[17:13] <Lunar_Lander> the famous "Come and get me"
[17:14] <Lunar_Lander> Manhigh was a project with ups and downs
[17:14] <Lunar_Lander> only Manhigh II was fully successful
[17:19] <Lunar_Lander> which balloon size is good for beginners?
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[17:21] <jcoxon> depends on payload weight really
[17:21] <jcoxon> something like a 1kg
[17:21] <Lunar_Lander> ok
[17:23] <Lunar_Lander> thanks :)
[17:28] <Lunar_Lander> great to see that rocketboy has all these items
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[17:50] <Lunar_Lander> is it always that silent?
[17:52] <DanielRichman> Boo
[17:54] <Lunar_Lander> :) hello
[17:55] <DanielRichman> Lunar_Lander, hi
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[17:56] <Lunar_Lander> nice to meet you too Daniel
[17:57] <sbasuita> >_>
[17:57] <DanielRichman> The I in IRC stands for Idle.
[17:57] <sbasuita> Idle/Robots/Channel-takeover
[17:58] <Lunar_Lander> :)
[17:58] <DanielRichman> Lunar_Lander, quite a few regulars here will wake up if you mention their names though
[17:58] <Lunar_Lander> do you know that quote from the inventor of the IRC?
[17:59] <Lunar_Lander> was something like: "Why does my invention get abused for decay of life, sex and dirty things? People, log off and get out of the house"
[17:59] <Lunar_Lander> yeah
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[17:59] <DanielRichman> Everyone worries about the abuse of their inventions, no?
[17:59] <Lunar_Lander> yeah
[18:00] <Lunar_Lander> sbasuita hello too
[18:00] <Lunar_Lander> are you from Japan (your nick sounds like it)?
[18:01] <sbasuita> Lunar_Lander, konichiwa
[18:01] <Lunar_Lander> konichiwa
[18:01] <Lunar_Lander> :)
[18:01] <DanielRichman> Lunar_Lander, no. He's English
[18:02] <sbasuita> i speak engrish good
[18:02] <Lunar_Lander> oh ok
[18:02] Action: Lunar_Lander only did a guess
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[18:03] <Lunar_Lander> hi jasonb
[18:05] <jasonb> Hi Lunar.
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[18:08] <Lunar_Lander> Wb jcoxon
[18:09] <Lunar_Lander> so, you all use that Radiometrix because the frequency is "Free for all"
[18:10] <Lunar_Lander> ?
[18:10] <SpeedEvil> yes
[18:10] <Lunar_Lander> that is nice
[18:10] <Lunar_Lander> I don't know if we got something like that here in Germany
[18:10] <SpeedEvil> There is no further regulation - past simply purchasing a approved radio
[18:10] <Lunar_Lander> yeah
[18:10] <jasonb> Where is Project Horus going to be? The web site either doesn't say, or it's buried about 300 feet down the page.. :)
[18:10] <russss> Lunar_Lander: you almost certainly have
[18:10] <Lunar_Lander> Australia I think jasonb
[18:10] <russss> it's the same frequency as garage door openers
[18:10] <Lunar_Lander> ah
[18:10] <Lunar_Lander> cool :)
[18:10] <jasonb> oh wait.. there's an About tab. :)
[18:11] <russss> it's only unlicensed in the UK at very low power, but we only need very low power
[18:11] <Lunar_Lander> ah
[18:11] <russss> maximum power is 10mW I think
[18:11] <Lunar_Lander> I just see that 5 GHz is free, but that is for FireWire
[18:11] <Lunar_Lander> I need to look further
[18:15] <Lunar_Lander> hmm
[18:15] <Lunar_Lander> WLAN frequencies are free
[18:17] <Lunar_Lander> what frequency is Radiometrix?
[18:17] <Lunar_Lander> is it 443 MHz?
[18:17] <russss> yes
[18:17] <russss> err
[18:17] <russss> I think we use 433 actually
[18:18] <russss> not sure if that varies by country.
[18:18] <Lunar_Lander> I read that 443, 868 MHz and 2.4 GHz are OK
[18:18] <russss> looks like radiometrix don't do a 443
[18:19] <Lunar_Lander> and CB is ok too
[18:19] <Lunar_Lander> but in turn it is only free for CB apparatus
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[18:26] <Lunar_Lander> OK
[18:26] <Lunar_Lander> seems like we also got 433
[18:27] <russss> there's more detail about the radio here: http://ukhas.org.uk/guides:radio_modules
[18:27] <russss> it's used in kind of an unusual way
[18:29] <Lunar_Lander> ah, thank you
[18:32] <russss> it's an FM module, but the flight computer modulates it as SSB
[18:33] <Lunar_Lander> yeah
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[18:44] <jcoxon> ping edmoore
[18:45] <edmoore> yo
[18:45] <edmoore> about to head off
[18:45] <edmoore> in about 10 secs
[18:45] <jcoxon> will you be back?
[18:46] <edmoore> much later
[18:46] <edmoore> sozzle
[18:46] <jcoxon> no worries
[18:46] <edmoore> maybe after last orders
[18:46] <edmoore> right bbl
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[19:01] <jcoxon> right, i've postponed BH4 till next weekend
[19:03] <JimAM> anything exciting been going on?
[19:03] <JimAM> project wise?
[19:03] <jcoxon> hi JimAM
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[19:03] <JimAM> evening
[19:03] <jcoxon> 2 launches currently lined up - Horus is being launched at 02:00UTC from australia
[19:04] <jcoxon> then BallastHalo 4 (UK) has been postponed till next weekend as the winds are too strong
[19:04] <JimAM> is horus an australian project I take it?
[19:04] <jcoxon> yeah\
[19:05] <JimAM> sleepless night ahead for some then eh!
[19:05] <jcoxon> its a little late/early for me
[19:05] Action: russss is not excited enough to stay awake for that one
[19:05] <jcoxon> but the non-UK people are keen :-)
[19:05] <Lunar_Lander> yeah :P
[19:05] <Lunar_Lander> thank you!
[19:05] <Lunar_Lander> xD
[19:05] <jcoxon> russss, would you be excited for BH4 then?
[19:06] <russss> yes
[19:06] <jcoxon> yay \o/
[19:06] <russss> hopefully I will get excited enough to put a goddamn antenna together in the next week
[19:06] <JimAM> for to it not crash though?
[19:06] <jcoxon> next weekend now
[19:06] <jcoxon> russss, yeah!
[19:06] <jcoxon> should do an antenna making workshop at hackspace
[19:06] <jcoxon> unfortunately i'm down in kent during hte week so can't come along
[19:07] <JimAM> what embedded stuff are the projects based on?
[19:07] <jcoxon> avrs/arduimo, pics, arms, gumstix
[19:07] <jcoxon> arduino*
[19:08] <JimAM> arduino fast enough for your needs?
[19:08] <JimAM> I remember last time someone mentioned fft's to do software gps
[19:08] <jcoxon> yeah basic stuff like GPS parsing and then radio transmissions
[19:08] <JimAM> you just parse serial data from a gps module?
[19:08] <jcoxon> hehe software GPS has been done but hardware gps are pretty cheap these days
[19:08] <jcoxon> yrah
[19:09] <russss> software GPS was probably for a rocket
[19:09] <JimAM> what frequency and modulation do you use for the radio stuff?
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[19:09] <JimAM> hey is there anywhere decent to buy this stuff in the uk?
[19:09] <JimAM> all I know of is sparkfun
[19:10] <russss> it's RTTY over 433MHz SSB
[19:10] <JimAM> and there's one guy selling arduino in the uk that I know of but he's charging a premium
[19:10] <jcoxon> JimAM, coolcomponents?
[19:10] <jcoxon> and we get the radios direct from radiometrix
[19:10] <JimAM> never heard of them
[19:10] <russss> heh. There's more than one guy selling Arduinos in the UK
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[19:10] <JimAM> cool beans, thanks very much
[19:11] <JimAM> is arduino avr is it?
[19:11] <russss> yep
[19:11] <JimAM> why not arm?
[19:11] <russss> ARMs tend to be more expensive I think. Or at least were
[19:11] <JimAM> oh ok
[19:11] <jcoxon> and more complicated pinouts
[19:11] <russss> Someone is making an arduino-style ARM board now
[19:12] <JimAM> use dev boards do you?
[19:12] <russss> http://www.bugblat.com/products/cor.html
[19:12] <russss> ARM toolchains are also a lot more complex it seems
[19:13] <JimAM> tool chain?
[19:13] <russss> compiler/linker/debugger/emulator
[19:13] <JimAM> i see
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[19:24] <Hiena> ' evening!
[19:26] <Hiena> I found a hilarious rocket video.
[19:27] <Hiena> http://neverworld.net/truax/video/TEI_X3_1A2.WMV
[19:27] <Hiena> The crew dumping LOX after a test run.
[19:28] <Hiena> Look for the guy, next to the nozzle.
[19:28] <Hiena> He had a very sophisticated hazmat suit.
[19:36] <Lunar_Lander> cool
[19:39] <Hiena> Yup. T-shirt and jeans.
[19:40] <Lunar_Lander> xD
[19:42] <Hiena> I means, similar situation the NASA would use a million dollar suits and at least ten man crew with a half day long process. And they just simply opens the valve and walks away.
[19:42] <JimAM> flipping heck that's a big rocket
[19:42] <JimAM> are they just boosting the fuel out under pressure?
[19:43] <JimAM> see the title of the video is 'firing'
[19:43] <JimAM> was that meant to ignite?
[19:43] <JimAM> bloody nuts if so
[19:45] <Hiena> They was dump the LOX after a failed test. Guess that stuff is liquid oxigen.
[19:45] <JimAM> bit of a waste
[19:45] <JimAM> wonder what they use to colour it
[19:48] <Lunar_Lander> hmm
[19:48] <Lunar_Lander> it is automatically blue
[19:48] <JimAM> looked pink
[19:49] <Lunar_Lander> http://en.wikipedia.org/wiki/Liquid_oxygen
[19:49] <Lunar_Lander> oh ok
[19:50] <JimAM> the steam looked pink anyway
[19:55] <Lunar_Lander> Yahoo Answers is not so good: http://answers.yahoo.com/question/index;_ylt=AvnHme9cR8aWk.L1g1rxUHHsy6IX;_ylv=3?qid=20091026133024AAB5Gxu
[19:57] <Hiena> Well, he is right.
[19:58] <Hiena> Possible to buy a cheap magnetic sensors and sending down the measured datas.
[19:59] <Hiena> Also, there is plenty of high impedance Op.amp which suitable for "electroscope" replacement.
[20:03] <Lunar_Lander> yeah
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[20:27] <juxta> morning all
[20:28] Laurenceb (~laurence@host86-141-239-7.range86-141.btcentralplus.com) joined #highaltitude.
[20:29] <Lunar_Lander> hi juxta
[20:31] <Laurenceb> hello
[20:32] <JimAM> what you using magnetic sensors for?
[20:32] <JimAM> looking for oil deposits?
[20:33] <Lunar_Lander> no, just measuring magnetic fields
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[20:33] <JimAM> ooh which fields?
[20:35] Action: Laurenceb has been looking at some more hot wire data
[20:35] <JimAM> anyone tell me what the heck a jtag connector is?
[20:35] <Laurenceb> looks like you need to stay <350C for long lifetime
[20:36] <Laurenceb> JimAM: for programming and debugging embedded systems
[20:36] <JimAM> just a ribbon cable though?
[20:36] <Laurenceb> wikipedia it
[20:37] <Lunar_Lander> well, the magnetic fields in the high atmosphere JimAM
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[20:38] <JimAM> is there much use for that though if you're just measuring them across your flight path?
[20:39] <Lunar_Lander> hm, I'd need to investigate that
[20:40] <Lunar_Lander> after the bathroom
[20:42] <JimAM> y'know what would be a good experiment for you high altitude types
[20:42] <JimAM> a test across the sound channel
[20:43] <JimAM> launching specifically with a view to entering the sound channel, synchronising with someone internationally and see if you can send data using PWM
[20:43] <Lunar_Lander> yeah
[20:43] <SpeedEvil> sound channel?
[20:43] <Lunar_Lander> brb
[20:44] <JimAM> yeah the sound channel was what roswell was all about
[20:44] <JimAM> high altitude balloon, microphones to detect rusky nuclear detonation
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[20:45] <natrium42> o/
[20:45] <JimAM> http://en.wikipedia.org/wiki/Project_Mogul
[20:46] <JimAM> it's to do with sound refracting when it reaches different temperature atmosphere
[20:46] <JimAM> keeps bouncing up and down and ends up travelling for huge distances
[20:46] <Randomskk> wow, really?
[20:47] <natrium42> yes
[20:47] <natrium42> :D
[20:47] <Randomskk> does one have to register ones email?
[20:47] <Randomskk> or is it just jcoxon?
[20:47] <natrium42> he hardcoded it afaik
[20:47] <Randomskk> hah awesome
[20:47] <natrium42> you can also do
[20:47] <Randomskk> so it pretty much solely has the potential to annoy him :P
[20:48] <natrium42> but it still emails james
[20:48] <Randomskk> haha
[20:49] <Laurenceb> satan@hell.com
[20:50] <Laurenceb> dont go to hell.com btw - its just weird
[20:51] <Randomskk> I know the guy who has you@lostthega.me
[20:51] <natrium42> nice
[20:53] <juxta> morning natrium42
[20:53] <natrium42> hey, you're up early
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[20:53] <juxta> :)
[20:54] <jcoxon> OI
[20:54] <jcoxon> someone summoned
[20:54] <natrium42> jcoxon, yeah
[20:54] <natrium42> i got the radiometrix module :D
[20:54] <jcoxon> yay
[20:54] <jcoxon> any extra charges?
[20:54] <natrium42> nope
[20:54] <natrium42> thanks again
[20:54] <jcoxon> sweet
[20:54] <natrium42> how much do i owe you?
[20:55] <jcoxon> 15GBP in total
[20:55] <natrium42> ok, could you pm me your paypal address?
[20:55] <jcoxon> its my email address
[20:56] <natrium42> kk
[20:56] <natrium42> so what's the best way to run the module?
[20:56] <JimAM> how do the radiometrix modules interface, serial?
[20:56] <jcoxon> natrium42, got a DAC?
[20:56] <natrium42> voltage divider?
[20:56] <natrium42> pwm?
[20:56] <natrium42> hmm, maybe
[20:57] <jcoxon> if not 2 voltage dividers to get your 2 voltages to give you a shift of say 450hz
[20:57] <natrium42> ok, but is square wave ok?
[20:58] <jcoxon> well we need 2 voltages
[20:58] <jcoxon> as freq is related to input voltage
[20:59] <natrium42> gotta run off for a meeting
[20:59] <Laurenceb> pwm and low pass IMO
[20:59] <natrium42> sorry
[20:59] <jcoxon> no worries
[21:05] <jcoxon> bbl
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[21:14] <Lunar_Lander> back
[21:14] <Lunar_Lander> hello RocketBoy
[21:20] <Lunar_Lander> I heard you run the randomscience-shop?
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[21:45] <Laurenceb> you mean random solutions
[21:46] <Lunar_Lander> yeah, sorry
[21:48] Action: Laurenceb is trying to work out how pt100 sensors are constructed
[21:48] <Laurenceb> http://uk.farnell.com/labfacility/dm-301/sensor-pt100-thin-film-2x2-3mm/dp/8598541
[21:48] <Laurenceb> I think thats the actual platigum film on the front
[21:49] <Laurenceb> past the blue epoxy - or whatever it is
[21:49] <Laurenceb> ie its on the front of the substrate not the back
[21:50] <RocketBoy> hey Laurenceb - i was thinking about the FFTs needed to decode FSK - was thinking that the best way would be to make a FFTs worth of samples (say 8 or 16) align with a data symbol (data bit) - say using GPS time to sync
[21:51] <Laurenceb> maybe
[21:51] <Laurenceb> a full fft seems excessive
[21:51] <Laurenceb> you just need some frequency bins
[21:51] <Laurenceb> also you can align using a DLL
[21:51] <natrium42> oh noes, they be taking my frequency bin
[21:52] <Laurenceb> natrium42: bin as in "integrate and dump"
[21:52] <natrium42> yes, yes... :P
[21:52] <juxta> time to head off to the launch site :)
[21:52] <natrium42> http://brescher.net/fark/SealBucket.jpg
[21:52] <natrium42> juxta, good luck!
[21:52] <juxta> cheers natrium42
[21:52] <Laurenceb> DLL takes two "decoder channels", one half a data symbol delayes
[21:52] <natrium42> may the winds be with you
[21:52] <Laurenceb> good luck
[21:52] <juxta> will jump on irc soon
[21:53] <Randomskk> good luck!
[21:53] <juxta> thanks guys :)
[21:53] <Laurenceb> then look at the signal at data bit transitions
[21:53] <Laurenceb> and adjust the timing to account
[21:53] <Laurenceb> RocketBoy: have you got the code I wrote?
[21:54] <natrium42> bbl, going home
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[21:56] <Laurenceb> IIRC I pastebinned it
[21:56] <RocketBoy> Laurenceb: nope I lost it
[21:56] Action: Laurenceb delves on HDD
[21:56] <RocketBoy> yeah
[21:58] <Laurenceb> http://pastebin.com/m131a631c
[21:59] <Laurenceb> http://pastebin.com/m531a4a78
[21:59] <Laurenceb> not finished, thats as far as Ive got
[22:00] <Laurenceb> needs a lookup table and a bunch of macros and stuff
[22:00] <Laurenceb> maybe some stupid errors hiding in there
[22:00] juxta (fourtytwo@ppp121-45-84-224.lns20.adl6.internode.on.net) left irc: Read error: Connection reset by peer
[22:01] <Laurenceb> basically it looks for a general FSK signal with the right symbol rate and frequency shift, then tracks and decodes it
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[22:08] <Laurenceb> Randomskk: http://www.micromouseonline.com/blog/2009/05/25/simple-adc-use-on-the-stm32
[22:08] <Randomskk> yea, their blog is great
[22:08] <Randomskk> I've got the ADCs doing all sorts of crazy things
[22:09] <Laurenceb> looks like you can do "scan" conversion with DMA
[22:09] <Randomskk> the ADC DMA is excellent, as is integration between the two ADCs
[22:09] <Laurenceb> so you could grab gyro data from multiple gyros and dma it all
[22:09] <RocketBoy> Laurenceb - I put them somewhere safe this time (but i probably didi that lat time too)
[22:09] <RocketBoy> last
[22:09] <Randomskk> Laurenceb: yea, definitely
[22:09] <Randomskk> two simultaneously too
[22:09] <Laurenceb> need to design my autopilot board :P
[22:10] <Laurenceb> well... need to work out how to sense airspeed cheaply and accurately first
[22:10] <Laurenceb> going to ring up labfacility and see if I can find out more about the sensor construction
[22:11] <Laurenceb> - their factory is in sheffield
[22:11] <Randomskk> nice
[22:12] <Laurenceb> my hot wire sensor is very cool, but you have to keep it <400C to avoid oxidation
[22:12] <Laurenceb> and that measn it picks up air temperature a bit too much
[22:13] <Laurenceb> also its rather easily damaged by dust or hail
[22:14] <Laurenceb> I'm thinking the most practical way to do it is two pt100 sensors, one hooked up to pwm on the stm32
[22:14] <RocketBoy> love the line printer paper output - green white alternate lines - what a blast from the past - probably before your time
[22:14] <Laurenceb> and run a control loop to keep it at constant temperature
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[22:15] <Laurenceb> RocketBoy?
[22:16] <Laurenceb> oh on pastebin?
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[22:18] <JimAM> only way to detect airspeed is with one of those twirly things isn't it?
[22:18] <JimAM> but they must be pretty cheap
[22:18] <JimAM> slap one of them on your mother ship, count the revolutions
[22:19] <JimAM> oh and of course you could use a pitot tube
[22:19] <JimAM> how silly of me
[22:19] <natrium42> airplanes use pitot tubes
[22:19] <natrium42> yeah
[22:19] <JimAM> you'd have to recalibrate for atmosphere though
[22:20] <JimAM> but you could do that digitally
[22:20] <JimAM> unless of course your diaphragm was at the extreme of mechanical operation
[22:20] <Laurenceb> "twirly things" = big, expensive, heavy, slow response
[22:20] <Laurenceb> piotot = diff pressure sensors and expensive, power hungry, big, drift with temperature
[22:20] <Laurenceb> *pitot
[22:21] <JimAM> 1mb for every 2k feet if I remember correctly or 2k ft for every degree of temp change
[22:21] <JimAM> something along those lines
[22:21] <Laurenceb> the diff pressure sensors themselves drift all over the shop
[22:21] <Laurenceb> well - wrt the crazy low pressures of a few pascals youre looking at
[22:22] <JimAM> how many kpa in 1bar?
[22:22] <Laurenceb> 100
[22:23] <Lunar_Lander> 101.3
[22:23] <Lunar_Lander> :P
[22:23] <JimAM> clever this metric stuff isn't it
[22:23] <JimAM> and at 100,000ft amsl
[22:24] <JimAM> hold on, 101.3kpa ?
[22:25] <JimAM> that would make it identical to bar wouldn't it?
[22:25] <JimAM> air pressure at mean sea level is 1013mb
[22:25] <Lunar_Lander> ye
[22:26] <Lunar_Lander> yes
[22:26] <Laurenceb> I'm planning on hot something or other sensors
[22:26] <Lunar_Lander> it is equivalent
[22:26] <Lunar_Lander> 1 bar= 101.3 kPa= 1013 hPa
[22:26] <JimAM> wow I never realised that, and I've seen that hPa annotation before
[22:27] <Laurenceb> 100Pa
[22:27] <RocketBoy> the great thing about pressure units is there are som many to choose from
[22:31] Action: natrium42 uses dynes per square furlongs
[22:32] <Lunar_Lander> yeah
[22:32] <Lunar_Lander> and so many obsolete
[22:32] <Laurenceb> sound like something wolfram alpha would come up with
[22:32] <Lunar_Lander> decibars for instance
[22:32] <Lunar_Lander> yeah
[22:32] <Lunar_Lander> try to give it a pressure
[22:32] <RocketBoy> US slugs?
[22:32] <Lunar_Lander> is that a pressure unit?
[22:32] <natrium42> slugs are mass units though
[22:32] <natrium42> you need force units
[22:33] <natrium42> or add acceleration units too
[22:36] <Lunar_Lander> yes
[22:40] <RocketBoy> wow a slug is a mass that accelerates by 1 ft/s2 when a one pound-force acts on it - and hence has a mass of 32.17405lbs
[22:40] <RocketBoy> - how useful is that
[22:40] <RocketBoy> probably still in use by NASA
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[22:40] <Lunar_Lander> yeah
[22:40] <Lunar_Lander> they also use Nautical Miles in the Shuttle and stuff like that
[22:41] <RocketBoy> yo jcoxon
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[22:42] <Randomskk> don't forget foot-pounds for energy
[22:43] <RocketBoy> I was discussing chutes with - edmoore - i'm thinking of getting some made rather than keep using the rocketry ones
[22:43] <Randomskk> are they even proper energy?
[22:43] <Laurenceb> my headis going to explode
[22:43] <jcoxon> hey RocketBoy
[22:44] <RocketBoy> edmoore suggested a couple of shapes to investigate - I was going to ask what you thought a good form of balloon attcahement might be
[22:44] <RocketBoy> the usual bottle top?
[22:45] <RocketBoy> or what about a tape loop?
[22:46] <RocketBoy> where the chute is man enough to take the payload on its lines and the balloon attached to the loop
[22:46] <RocketBoy> (rather than have a line go up the middle of the chute)
[22:47] <jcoxon> ooo im not sure
[22:49] <RocketBoy> i guess it will need some experimentation
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[23:03] <Laurenceb> we need a cutdown
[23:03] <Laurenceb> so evn if we use
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[23:04] <Laurenceb> a hose to the ballast tank, there will need to be the trigger to the cutdown integrated into the upper dipole
[23:04] <natrium42> edmoore!!!
[23:05] <edmoore> yo
[23:05] <RocketBoy> was thinking of a "button hole" next to the attachment loop - for taking the cutdown wire through
[23:05] <natrium42> edmoore appears just as quickly as he disappears
[23:05] <edmoore> ?
[23:05] <natrium42> :D
[23:05] <Laurenceb> so envelope--cutdown--chute--ballast--hose--payload--trailing dipole
[23:05] <Laurenceb> or somehing
[23:06] <Laurenceb> radar reflector and whatnot in there somewhere
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[23:07] <edmoore> hi G8DSU
[23:08] <JimAM> put a propeller on it too and fly it to the antartic get some photos of the penguins
[23:08] <RocketBoy> needs thinking about what with wires going to cutdowns, pump and dipole
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[23:08] <jonsowman> hi edmoore, hows things
[23:09] <Laurenceb> RocketBoy: onto two wires going up
[23:09] <Laurenceb> to the cutdown
[23:09] <Laurenceb> then use a hose going up to the ballast - that vastly simplifies it IMO
[23:09] <JimAM> god I'd love to go to the antarctic
[23:09] <edmoore> good but busy. i took the pirates back today as i didnt want them to get confused for stuff at the meetiung
[23:09] <edmoore> but they will b in lab from 930 tomorrow
[23:10] <jonsowman> ok no probs, cheers
[23:10] <jonsowman> is this hobble busyness?
[23:11] <edmoore> yep
[23:11] <edmoore> plus degree
[23:11] <JimAM> do you guys use an RTOS on your embedded stuff?
[23:11] <edmoore> a lot of the modules have associatedexamined coursework
[23:12] <edmoore> it means you always need to be working on stuff that is worth lots of marks
[23:12] <edmoore> JimAM: yes
[23:12] <JimAM> whats your preference?
[23:12] <edmoore> TNKernel on ARM7 LPC2148 and 2368
[23:12] <edmoore> is what we've flown/are flying
[23:12] <jcoxon> hey edmoore
[23:12] <edmoore> hi
[23:12] <Randomskk> edmoore: if we wanted to get a PCB to datalog the static test rig made up at CUSF, how involved is that?
[23:13] <Randomskk> uh, CUED*
[23:13] <Randomskk> also you are probably the most likely person to know if CUED has a laser cutter?
[23:14] <edmoore> it doesn't
[23:14] <RocketBoy> nights
[23:14] <Lunar_Lander> good night people
[23:14] <jcoxon> edmoore, BH4 postponed till next weekend - is that okay with you?
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[23:14] <Randomskk> baww
[23:14] <edmoore> jcoxon: churchill already has someone down to launch on sat
[23:14] <jcoxon> hmmm okay
[23:14] <edmoore> Randomskk: you need to talk to Gavor in the EDG at the top of the stairs to the left of the lab
[23:14] <edmoore> good luck with that
[23:14] <Lunar_Lander> see you tomorrow!
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[23:15] <edmoore> he's the most difficult human being in the history of human beings
[23:15] <Randomskk> woo
[23:15] <edmoore> take pcbs you've designed and made with you, ignore absolutely all of his suggestions, and be firm in what you want
[23:15] <Randomskk> got it
[23:15] <edmoore> basically he will assume you are a bacteria and start with ohms law and become increasinly more patronising as he works his way up. you have to cut through this
[23:16] <edmoore> how was meeting - who was there?
[23:16] <Randomskk> isn't that basically how first year works?
[23:16] <Randomskk> not many people really and we didn't have much to go through so you didn't exactly miss much
[23:16] <edmoore> thursday eves really are not good for me
[23:16] <Randomskk> dan came by for a few minutes but had to run and besides jon and I there were a few other people
[23:17] Action: Randomskk can't do thursday next week anyway
[23:17] <Randomskk> I did have a chat with the guy from your lab who is playing with stuff on speakers?
[23:17] <edmoore> michael
[23:17] <Randomskk> he seems pretty interested in it
[23:17] <edmoore> great guy
[23:18] <Randomskk> also non-newtonian fluids on speakers is always fun
[23:18] <edmoore> :)
[23:18] <Randomskk> sadly his test with salt was not very successful, he thinks he needs sand instead or such
[23:18] <Laurenceb> jcoxon: why the delay?
[23:18] <jcoxon> cause Laurenceb if we launched on saturday with 4 hours of float we'd reach berlin
[23:18] <Laurenceb> wow
[23:19] <Laurenceb> fairdoos
[23:19] <jcoxon> :-p
[23:19] <edmoore> right, sleepy time
[23:19] <edmoore> c u
[23:19] <Randomskk> seeya
[23:19] <JimAM> berlin? sounds like payback time
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[23:19] <jcoxon> night
[23:19] <Randomskk> JimAM: 99 red balloons, etc
[23:19] <jcoxon> JimAM, hmmmmm :-)
[23:19] <Randomskk> :P
[23:20] <jcoxon> if churchill is busy - might have to switch to EARs
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[23:27] <JimAM> night chaps
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[23:29] <Laurenceb> cya all
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[23:35] <jcoxon> hmmm i wonder if juxta has put the launch on ARHAB
[23:36] <Randomskk> shame pretty much the entire planet is blocking his signals
[23:36] <jcoxon> yeah, if he was using HF there could still be a crazy chance
[23:37] <jcoxon> nope hasn't done ARHAB
[23:37] <Randomskk> should put an ELF antenna on a balloon, would hear it anywhere
[23:37] <jcoxon> probably a little late
[23:37] <Randomskk> though admittedly an ELF antenna would have to be pretty gigantic
[23:38] <Randomskk> HF could work at some times of day depending on the ionosphere but that's yet another thing you'd have to worry about before launching
[23:38] <Randomskk> and I have to wonder how often both the winds and the ionosphere are perfectly aligned :P
[23:39] <Randomskk> plus you'd need a significant amount of power to get really far
[23:39] <jcoxon> for atlantic halo though we should still put people on alert - just in case
[23:39] <Randomskk> yea
[23:39] <Randomskk> who knows where it will drift
[23:40] <Randomskk> ELF is awesome though
[23:40] <Randomskk> 3Hz
[23:42] <jcoxon> :-D
[23:42] <Randomskk> a dipole is approx. half the earth's diameter
[23:42] <Randomskk> you just stick really long cables into the ground and use the entire planet as your antenna
[23:47] <jcoxon> right sleep time - who knows i might get up in a few hours to check in with juxtas launch
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[00:00] --- Fri Feb 5 2010