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[00:33] <SpeedEvil> http://www.youtube.com/watch?v=Zei-_h63ZKU&feature=related
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[00:38] <Laurenceb> hi edmoore
[00:39] <SpeedEvil> (random vid - not related)
[00:39] <edmoore> hi
[00:40] <Laurenceb> edmoore: what do you think to a tetroon?
[00:40] <Laurenceb> I've been working on a design a bit
[00:40] <SpeedEvil> What is the area WRT a spher?
[00:40] <edmoore> will think aboot it tomorrow
[00:40] <edmoore> going to sleep now
[00:40] <Laurenceb> Speed: wikipedia has the answers
[00:40] <Laurenceb> cya then
[00:41] <Laurenceb> sleep well
[00:41] <SpeedEvil> Yes, it does, I was assuming you'd looked it up.
[00:41] <Laurenceb> volume = sqrt(1/72)a^3
[00:41] <Laurenceb> a=side lenght
[00:42] <SpeedEvil> That's not horrible.
[00:42] <SpeedEvil> I suppose in practice it'll bulge a bit so not be that bad even.
[00:44] <Laurenceb> yeah, thats what people say
[00:44] <Laurenceb> the point is its so easy to make
[00:45] <Laurenceb> you dont bother with triangles or anything, just make a tube of the correct ratio and seam both ends
[00:51] <SpeedEvil> Oh - right.
[00:51] <SpeedEvil> I was assuming you were going to square the tarps, and seam the edges
[00:52] <Laurenceb> no, its really easy
[00:52] <Laurenceb> make a tube approx 10m circumference, 4m high
[00:53] <Laurenceb> then seal the ends at 90 degrees wrt angle measured about the central axis
[00:53] <Laurenceb> and your done
[00:53] <SpeedEvil> Hmm.
[00:53] <Laurenceb> try it with paper
[00:53] <SpeedEvil> yeah - I see it.
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[01:53] <Laurenceb> arggg
[01:53] <Laurenceb> my programmer seems to have fried itself
[01:54] <Laurenceb> this doesnt make any sense
[02:06] <Laurenceb> wow... reinstalling the driver fixed it *wipes brow*
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[03:39] <natrium42> the wiki is down?
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[05:25] <rjharrison> Doing tethered launch this morning to test camera angle when looking out of window in payload
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[06:20] <rjharrison> morning natrium42
[06:20] <natrium42> hey
[06:44] <natrium42> !summon jcoxon
[06:50] <rjharrison> :)
[06:50] <rjharrison> Does that work?
[06:50] <rjharrison> Wakes him up
[06:51] <rjharrison> puts the kettle and computer on :)
[06:51] <natrium42> it worked once
[06:51] <rjharrison> lol
[06:51] <natrium42> XD
[06:53] <rjharrison> bolox coors were wrong for some reason
[06:54] <rjharrison> coordinates
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[08:08] <rjharrison> edmoore: Ping
[08:08] <rjharrison> What's your view on the weather?
[08:08] <edmoore> rjharrison: morning
[08:08] <edmoore> let me have a butchers
[08:09] <edmoore> ok, so it's got a little more choppy
[08:09] <natrium42> hey edmoore
[08:09] <edmoore> we'll go for a fast ascent
[08:10] <edmoore> we're still launching
[08:10] <rjharrison> I nearly launched this morning
[08:10] <rjharrison> Still considering from here
[08:10] <edmoore> :)
[08:10] <edmoore> from your place it's dire
[08:10] <rjharrison> Well
[08:10] <rjharrison> http://www.robertharrison.org/files/icarus/
[08:10] <rjharrison> have a look at the yorkshire one
[08:11] <rjharrison> BTW where do you check the weatehr
[08:11] <rjharrison> weather
[08:13] <edmoore> wunderground
[08:14] <edmoore> ok need to grab some breakfast. we'll still be launching tomorrow
[08:14] <edmoore> 8am churchill is ok
[08:14] <edmoore> 11 is workable
[08:14] <edmoore> we'll got for 5.5m/s ascent
[08:14] <edmoore> bbiab
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[08:24] <rjharrison> natrium42 it 3.45 am with you?
[08:24] <natrium42> 3.24 :)
[08:24] <natrium42> what have you decided?
[08:25] <rjharrison> You're like the UK lot. Neaver sleeping. I'm going to decide in the next hour
[08:25] <rjharrison> Have you got work / college tomorrow
[08:25] <rjharrison> well today
[08:25] <natrium42> nope
[08:25] <natrium42> only on Tue and Thur
[08:25] <rjharrison> Just spoken to my mother to see if she will be navigator
[08:55] <natrium42> bed time for me
[08:56] <natrium42> rjharrison: good luck with the launch, if you decide to go for it
[08:56] Action: natrium42 Zzz
[08:57] <rjharrison> natrium42 Ok nights
[08:58] <rjharrison> Will hopefully have some pics for you when you wake up
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[09:22] <jcoxon> morning all
[09:24] <edmoore> rjharrison: back
[09:24] <edmoore> rjharrison: I can make no firm promises atm on what our schedule will be as we might have to subtley re-think
[09:25] <jcoxon> morning edmoore
[09:25] <edmoore> morning
[09:25] <edmoore> the JS suddenly got a bit shit
[09:26] <jcoxon> oh
[09:26] <jcoxon> its still okay early sat
[09:26] <jcoxon> and sunday is okay still
[09:26] <edmoore> it's 'ok'
[09:27] <jcoxon> indeed
[09:27] <edmoore> but there is that big front on saturday
[09:27] <jcoxon> how wyoming forecasts?
[09:27] <edmoore> that if we dawdle will sweep us up
[09:27] <edmoore> doing one now
[09:27] <jcoxon> indeed
[09:27] <jcoxon> quite a tight window
[09:27] <edmoore> may go for a 6m/s ascent
[09:27] <edmoore> to be safe
[09:28] <jcoxon> fair enough
[09:28] <jcoxon> looking at the other JS forecasts it isn't too bad
[09:28] <jcoxon> http://squall.sfsu.edu/gif/jetstream_atl_h36_00.gif
[09:29] <edmoore> prediction puts us on felixstowe
[09:29] <edmoore> with wyoming
[09:29] <edmoore> and it is never actually that bad
[09:29] <edmoore> ok
[09:29] <edmoore> still ok
[09:29] <edmoore> nobody panic
[09:30] <edmoore> is anyone else on wyoming?
[09:30] <jcoxon> especially with a faster descent
[09:30] <jcoxon> i'm not
[09:30] <edmoore> if anyone is, can I politely ask for a bugger-off as I need to do another run before i leave for my lecture
[09:31] <edmoore> ok it's going
[09:31] <jcoxon> haha
[09:32] <edmoore> hrm, the 36 hour one is bad
[09:32] <edmoore> ok, need to think this through more
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[10:05] <jcoxon> hmmm, can a lipo be charged by a solar panel?
[10:05] <SpeedEvil> maxim-ic have lots of battery chargers
[10:06] <SpeedEvil> the short answer is that you've got to limit the charge voltage to 4.2V
[10:06] <SpeedEvil> Or it can explode
[10:06] <jcoxon> okay
[10:09] <SpeedEvil> See http://www.sureelectronics.net/goods.php?id=44
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[10:11] <jcoxon> SpeedEvil, that'll limit the charge volatage
[10:11] <jcoxon> but will it cope with a slow trickle such as a solar panel
[10:12] <jcoxon> ?
[10:13] <jcoxon> morning rjharrison
[10:33] <SpeedEvil> jcoxon: I haven't read the datasheet in detail.
[10:34] <SpeedEvil> IIRC farnell have adjustable shunt regulators going up to about 50mA
[10:35] <jcoxon> okay, thanks for hte help
[10:35] <SpeedEvil> Other thing is that if you discharge the cell below 2.5v, it may not charge again. So turning off the radio at 3.3V or so is probably a good idea
[10:35] <jcoxon> for once i wasn't thinking about balloons :-p
[10:36] <jcoxon> was thinking about a sea floater
[10:36] <SpeedEvil> WHAT!
[10:36] <SpeedEvil> :)
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[10:40] <jcoxon> hmmm i should really get ready for tomorrows launches
[10:40] <SpeedEvil> What sort of sensor?
[10:40] <SpeedEvil> I mean - what on the floater?
[10:40] <jcoxon> oh, i was thinking gps of course
[10:41] <jcoxon> then perhaps gsm
[10:41] <jcoxon> to relay the data
[10:41] <SpeedEvil> gsm only or HF
[10:42] <jcoxon> thats part of the debate
[10:42] <jcoxon> i've got a slightly dud gm862-gps module
[10:42] <jcoxon> which could be made to work
[10:42] <jcoxon> then i was thinking a msp430+solar charger to occasionally wake it up to grab gps and send gsm
[10:43] <jcoxon> but a gm862 will really need a LIPO cell as they draw up to 2A when sending data
[10:44] <SpeedEvil> If it's a floater, why not just go for a few D cells?
[10:45] <jcoxon> to power the whole thing?
[10:46] <SpeedEvil> yes
[10:46] <jcoxon> i guess so
[10:46] <SpeedEvil> Is the module quadband?
[10:47] <jcoxon> yup
[10:47] <SpeedEvil> Do you have a SIM with roaming?
[10:47] <jcoxon> not right now - but i reckon i could get one
[10:48] <jcoxon> would be cool to have it tracked on the tracker
[10:51] <jcoxon> SpeedEvil, http://www.sparkfun.com/commerce/product_info.php?products_id=8251 + 10000mAh D cell
[10:52] <jcoxon> that said - might as well use an AA as its going to get charged
[10:57] <SpeedEvil> remember that you get maybe a quarter of the power average out of a solar cell as it says on the tin.
[10:57] <SpeedEvil> Less if it's upside-down on a rock :)
[10:57] <jcoxon> true, - oh well tis a in idea for the future
[10:57] <jcoxon> hehe
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[11:40] <edmoore> rjharrison:
[11:40] <edmoore> ok
[11:40] <edmoore> am back for a bit now
[11:40] <edmoore> what are your thoughts?
[11:46] <edmoore> back at 12.05
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[12:02] <edmoore> bk
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[12:22] <gordonjcp> http://www.gjcp.net/~gordonjcp/friday1106.ogg
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[13:40] <jcoxon> hey edmoore
[14:17] <jcoxon> gordonjcp, is that ogg file from the ISS?
[14:28] <gordonjcp> yup
[14:29] <jcoxon> amazing
[14:29] <gordonjcp> isn't it just
[14:29] <gordonjcp> I emailed the school with a link to the mp3 (there's an mp3 as well as an ogg)
[14:29] <gordonjcp> I missed the last pass though :-/
[14:29] <jcoxon> 2m band?
[14:29] <gordonjcp> ye
[14:30] <gordonjcp> 145.8
[14:30] <gordonjcp> if the pass is high enough you should get it with just a vertical
[14:30] <gordonjcp> it's *fucking* loud
[14:30] <gordonjcp> at maximum elevation he was 5/9 here
[14:30] <jcoxon> cool
[14:30] <jcoxon> sadly i don't have a 2m rig
[14:31] <gordonjcp> hm, I thought yours was a dual-bander?
[14:31] <jcoxon> nah just 70cm
[14:31] <gordonjcp> ah, ok
[14:31] <gordonjcp> what have you got?
[14:32] <jcoxon> yaesu ft-790r
[14:32] <jcoxon> which is really good for balloon stuff
[14:34] <gordonjcp> yeah
[14:34] <gordonjcp> does ssb!
[14:34] <jcoxon> indeed
[14:34] <gordonjcp> I need an ssb VHF rig
[14:34] <gordonjcp> well s/need/could do with/
[14:34] <jcoxon> hehe
[14:34] <jcoxon> hopefully will be able to track tomorrow
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[14:59] <jcoxon> hmmmm with a 1/4 wave ground antenna that is mounted facing down on a payload is that vertically or horizontally polorised?
[15:05] <gordonjcp> vertically
[15:05] <gordonjcp> incidentally have I mentioned how shit hot j-poles are?
[15:05] <jcoxon> i've been getting hints from you about them
[15:06] <gordonjcp> since they're actually designed for working from a balloon, that might be the way forward
[15:06] <jcoxon> on the balloon end or the receiver?
[15:07] <gordonjcp> on the balloon end
[15:07] <gordonjcp> although tbh I'm impressed with how well I heard the ISS with mine
[15:07] <gordonjcp> I'd still use a small Yagi for the RX end
[15:07] <jcoxon> i'm going to try out my Moxon tomorrow
[15:08] <gordonjcp> let me know how you get on
[15:08] <gordonjcp> I fancy trying one of them
[15:10] <jcoxon> is it worth me putting it outside my window or do you reckon it'll be fine indoors (if so i need t oget some more coax
[15:10] <jcoxon> )
[15:20] <gordonjcp> needs to be outdoors, I'd suspect
[15:22] <jcoxon> okay cool, i'll get some more coax and extend it - then stick it on a pole outside my window to get a bit more height
[15:22] <SpeedEvil> Height is always good.
[15:22] <SpeedEvil> It depends on the construction of your house as to if it'll work well.
[15:23] <SpeedEvil> 400MHz will go through a thin skin of dry brick quite well.
[15:23] <SpeedEvil> However, if you've got foil backed plasterboard, and coated double glazed windows, it may not work so well.
[15:23] <jcoxon> my set up is by a large window
[15:24] <SpeedEvil> Some double glazing is RF opaque
[15:24] <jcoxon> nah its single glazing
[15:24] <jcoxon> i mean i managed to rx last time with my whip indoors
[15:24] <jcoxon> but this time i want to get a clearer and better signal
[15:25] Action: SpeedEvil passes jcoxon 200m of coax and a balloon.
[15:26] <jcoxon> a skyhook!
[15:26] <jcoxon> not sure they'll be too happy in the centre of london
[15:26] <SpeedEvil> Take it to the Eifell tower.
[15:27] <jcoxon> i'm based in Guy hospital right now , shame i can't use the top floor
[15:27] <jcoxon> that would give me a good bit of height
[15:31] <gordonjcp> jcoxon: you probably cood
[15:31] <gordonjcp> *cood/could
[15:31] <gordonjcp> fuck's sake why can't I type today?
[15:31] <gordonjcp> jcoxon: talk to the building services guys
[15:31] <gordonjcp> bring something nice for a cup of tea
[15:32] <SpeedEvil> Doesn't guys have a helipad?
[15:33] <gordonjcp> jcoxon: seriously, all there will be up there is a shed full of AHUs and maybe some ambulance radio gear
[15:34] <jcoxon> I'll see if can pull a few favours
[15:35] <jcoxon> thats again something for the future
[15:35] <SpeedEvil> Get with some base-jumpers, and chicken out and just sit at the top with your radio :)
[15:36] <jcoxon> haha
[15:40] <jcoxon> bbiab
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[16:56] <robert_asus> afternoon all
[16:56] <jcoxon> afternoon
[16:57] Nick change: robert_asus -> rharrison
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[17:19] <jcoxon> bbl
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[18:25] <epictetus> [14:24:19] ep1ctetv5: it's like a cross between oedipus, romeo and juliet, and the bible 02:24PM ep1ctetv5 [Query: Hildago] [AIM 14d 0:54m] naim
[18:25] <epictetus> whoops
[18:25] <epictetus> accidental cutpaste
[18:25] <epictetus> sorry
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[19:31] <rjharrison> natrium42
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[19:33] <Laurenceb> hello
[20:10] <natrium42> hi
[20:10] <natrium42> rjharrison: so, what happened?
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[20:16] <natrium42> whoa, what are those pics in /files/icarus? :D
[20:18] <Laurenceb> oh theres been a launch?
[20:18] <Laurenceb> I was thinking it was tomorrow
[20:18] <Laurenceb> where are these photos?
[20:18] <natrium42> looks like rjharrison lauched today :D
[20:18] <Laurenceb> cool
[20:19] <jnd> nice ogg gordonjcp
[20:19] <natrium42> i discovered them here http://www.robertharrison.org/files/icarus/
[20:19] Action: SpeedEvil missed that.
[20:19] <SpeedEvil> When?
[20:19] Action: natrium42 pokes rjharrison
[20:19] <natrium42> i was asleep
[20:19] <SpeedEvil> Ah. I guess 1 Jan 2002.
[20:20] <natrium42> lol
[20:20] <natrium42> i also forgot to change camera date/time once, had to go in with an exif tool
[20:20] <natrium42> ah, but this is the server time
[20:21] <Laurenceb> oah 30Km
[20:21] <Laurenceb> according to the kml
[20:21] <natrium42> which kml?
[20:21] <Laurenceb> the photos are nice
[20:22] <SpeedEvil> There is a kml in the above directory
[20:22] <Laurenceb> http://www.robertharrison.org/files/icarus/Trajectory%20from%20Cambridge.kml
[20:22] <SpeedEvil> http://www.robertharrison.org/files/icarus/Trajectory%20from%20Cambridge.kml
[20:22] <Laurenceb> lol
[20:23] <Laurenceb> http://www.robertharrison.org/files/icarus/IMG_0370.JPG
[20:23] <natrium42> those are wyoming predictions
[20:23] <Laurenceb> I like that one
[20:23] <Laurenceb> ah
[20:23] <Laurenceb> hang on thats not cambridge
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[20:27] <Xenion> Guten Abend alle miteinander :-) / Good evening
[20:27] <natrium42> hi Xenion
[20:29] <SpeedEvil> yes, the crazy astronaut lady.
[20:29] <SpeedEvil> oops
[20:30] <Laurenceb> freudian slip?
[20:30] <SpeedEvil> http://www.encyclopediadramatica.com/Lisa_Nowak
[20:30] <SpeedEvil> err
[20:30] <SpeedEvil> http://en.wikipedia.org/wiki/Lisa_Nowak I mean
[20:32] <SpeedEvil> Was discussing that she had an upcoming hearing in another channel.
[20:41] <Hiena> SpeedEvil, not so much differenties.
[20:42] <Hiena> And being astronaut not clear you being nut.
[20:42] <SpeedEvil> No.
[20:43] <SpeedEvil> It sounds like - from the various bios - that she'd led a very 'virtuous' career-driven and focussed path without actually being exposed to 'real life'.
[20:43] <SpeedEvil> Which of course the astronaut selection process would select for.
[20:44] <SpeedEvil> Maybe even more in the case of women than men.
[21:06] <Laurenceb> I got some nxt2 modules this morning :P
[21:07] <Laurenceb> just been finishing off the mini rogallo radio
[21:21] <natrium42> so when's launch?
[21:22] <Laurenceb> hopefully in november
[21:22] <SpeedEvil> Nov 5!
[21:22] <SpeedEvil> Bonfire tied under _really_ big tarp.
[21:22] <Laurenceb> it seems to be going ok, atm theres only one issue - the gps was intermittently stoping its packet output
[21:22] <Laurenceb> when I tested it outside
[21:23] <SpeedEvil> Figured that out?
[21:23] <Laurenceb> no, havent looked at it yet
[21:23] <Laurenceb> been assembling the radio and writing a new version of the radio code
[21:23] <natrium42> Laurenceb: 13 Nov
[21:23] <natrium42> it's my b-day :)
[21:23] <Laurenceb> :P how old will you be?
[21:24] <Laurenceb> I've also made the servo oscillate with a triangle wave before cutdown, to help stop it freezing
[21:24] <natrium42> Laurenceb: 5^5
[21:24] <natrium42> err
[21:24] <natrium42> 5*5
[21:24] <natrium42> oops
[21:24] <natrium42> :D
[21:26] <Laurenceb> I'm bidding on an icom scanner on ebay
[21:26] <Laurenceb> annoyingly I missed one yesterday by 6 seconds
[21:27] Hiena (n=Hiena@ left irc: "-=Halt! Hammerzeit!=-"
[21:28] <Laurenceb> hopefully I'll have 3 projects ready soon
[21:28] <Laurenceb> mini rogallo, aerosol sampler and a long duration tetroon
[21:33] <Laurenceb> I've just been designing a long duration tetroon, hopefully one of these can go on http://www.sparkfun.com/commerce/product_info.php?products_id=8257
[21:37] <natrium42> yay, icom
[21:37] <Laurenceb> pcr-1000
[21:38] <Laurenceb> the problem with my tetroon idea is everything has to run off an i2c bus
[21:39] <Laurenceb> and I can only find 3 channel i2c 16bit ADCs with a PGA built in
[21:39] <Laurenceb> it really needs 4 channel - Vbat, external temperature, envelope temperature and pressure
[21:40] <natrium42> so add another one?
[21:40] <SpeedEvil> Well - MSP430s have those built in
[21:41] <SpeedEvil> the 16 bit sigma-delta ones that is
[21:41] <Laurenceb> yeah
[21:42] <Laurenceb> maybe I should switch to an MSP430 based radio
[21:44] <Laurenceb> hmm also I can find a 3.3v pressure sensor
[21:47] <natrium42> Laurenceb: how do they weld tetroons?
[21:48] <Laurenceb> I'd just use tape maybe
[21:51] <Laurenceb> http://www.sensortechnics.com/index.php?fid=300&fpar=YToxOntzOjQ6InBjaWQiO3M6MzoiMTc4Ijt9&isSSL=0&aps=0&blub=5d54ba80381f43f13bd08c6b7de107b9
[21:51] <Laurenceb> pity it takes 5V... guess I could add a smps
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[21:52] <natrium42> digital output, nice
[21:53] <Laurenceb> ohh apparently 3.3v is avaliable on request
[21:53] <natrium42> hi edmoore
[21:53] <Laurenceb> hi ed
[21:53] <edmoore> hello. we cancelled, btw
[21:53] <edmoore> too windy tomorrow
[21:54] <natrium42> :(
[21:55] <natrium42> launch anyway!
[21:55] <natrium42> get to travel to france
[21:55] <edmoore> so our altitude record is broken
[21:55] <edmoore> now the race is on
[21:56] <natrium42> ;)
[21:56] <natrium42> .join #highaltitude2
[21:56] <natrium42> whoops
[21:58] <Xenion> edmoore, what was the record ?
[21:58] <edmoore> our own one was 334xx
[21:58] <edmoore> i forget exactly
[21:58] <edmoore> now it's 35xxx
[21:58] <Xenion> ft or km
[21:59] <edmoore> km
[21:59] <Xenion> 35km
[21:59] <Xenion> i see
[21:59] <edmoore> >35km
[21:59] <edmoore> impressive, i think
[21:59] <Xenion> edmoore, by who ?
[21:59] <Xenion> edmoore, it is
[21:59] <edmoore> rjharrison
[21:59] <Xenion> i've read about that under good condition 38 ist possible
[21:59] <edmoore> oh totally
[21:59] <edmoore> we were going to try for 38 tomorrow but have been winded off
[22:00] <Xenion> edmoore, winded ?
[22:00] <edmoore> the wind was too strong
[22:00] <Xenion> ahh
[22:00] <Xenion> i see
[22:00] <edmoore> it's not actully a word, in this context
[22:00] <Xenion> ^^
[22:00] <Xenion> :D
[22:00] <Xenion> for non englisch speakers things like this fall out of context :D
[22:00] <edmoore> sorry :)
[22:01] <Laurenceb> hmm I cant quite find anything on sensortechnics
[22:02] <Laurenceb> but theres so many sensors :P
[22:02] <Laurenceb> guess its best to tring them and describe the application, I'm sure they have some hab usable ones
[22:05] <Laurenceb> Ibbl
[22:13] <Xenion> Gute Nacht alle miteinander, träumt was schönes ! .. oder setzt eure träume in die realität um ;) -> www.ukhas.org.uk
[22:13] <Xenion> good night folks !
[22:13] <Xenion> :-)
[22:14] <natrium42> lol, nite
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[22:45] <jcoxon> evening all
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[23:08] <Laurenceb> back
[23:09] <Laurenceb> grr I need a camera
[23:09] <jcoxon> hey Laurenceb
[23:11] <Laurenceb> I called in at curries earlier but they dont have any of their <£100 cameras in store :(
[23:11] <Laurenceb> guess you just have to bu online
[23:12] <jcoxon> yeah you need to search around a bit
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[23:26] <jcoxon> hey edmoore
[23:39] <Laurenceb> http://www.globalsources.com/gsol/I/Pressure-sensor/p/sm/1006172224.htm
[23:39] <Laurenceb> ^ nice... pity its in china
[00:00] --- Sat Oct 18 2008