highaltitude.log.20111127

[00:00] <Lunar_Lander> and a friend of mine said I should consider raspberry
[00:00] <SpeedEvil> It depends.
[00:00] <SpeedEvil> It's probably never going to compete on power use.
[00:00] <Lunar_Lander> yea
[00:00] <SpeedEvil> But, in some ways it's orders of magnitude more easy to so stuff.
[00:01] <Lunar_Lander> yea
[00:01] <SpeedEvil> Taking input from several cameras, mapping them all to a sphere, and transmitting the portion of that sphere pointing in one direction, for example, may be possible.
[00:01] <SpeedEvil> Quite easily.
[00:01] <fsphil-laptop> my satellite receiver just turned itself off at midnight
[00:01] <fsphil-laptop> how rude
[00:02] <Lunar_Lander> yeah
[00:02] <fsphil-laptop> I'd love to do that in post-processing SpeedEvil, but well above my level of skills
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[00:04] <SpeedEvil> I _think_ you can do it with pnmtools.
[00:04] <SpeedEvil> Transform each image into its mapping on a cylindrical projection
[00:04] <SpeedEvil> then it's a case of reading out the image a tthe right x/y
[00:05] <SpeedEvil> To do it 'right' would be harder.
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[00:35] <plantain> uh oh
[00:35] <plantain> that's a power substation just there
[00:36] <plantain> it's path is right through the high voltage lines
[00:37] <SpeedEvil> Someone did that before IIRC.
[00:38] <SpeedEvil> if from the 5km zoom scale, you see your balloon projected to a place called megawatt...
[00:39] <Lunar_Lander> yeah that was a WB8ELK flight in California IIRC
[00:40] <SpeedEvil> I don't remember if that got recovered.
[00:40] <Lunar_Lander> yea
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[01:12] <gonzo_> nice that you got telem down to visual level
[01:12] <gonzo_> hope it was clear of the wires though, there look to be a lot there!
[01:12] <NigeyS> yeah i jus saw that
[01:14] <gonzo_> maybee there is some truth in peoples fear of health effects from power lines?! They attract balloons! You could get a polystyrere lump on the head
[01:14] <NigeyS> lol
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[01:28] <Darkside> recovered!
[01:28] <Darkside> all good
[01:28] <NigeyS> good job Darkside
[01:42] <Lunar_Lander> yay
[01:42] <Lunar_Lander> hi NigeyS
[01:42] <NigeyS> hey kev
[01:42] <VK5ZEA> DANG! Just got home from work and the balloon uis down...
[01:43] <Darkside> heh
[01:43] <Darkside> sorry michael
[01:43] <Darkside> <-- VK5FDRK
[01:43] <VK5ZEA> Hi Mark!
[01:43] <Darkside> ey
[01:43] <Darkside> hey
[01:43] <Darkside> payload was recovered all fine
[01:44] <Darkside> heading back to VK5GHs now
[01:45] <VK5ZEA> Excellent. I will have to re live the flight via Google Earth.
[01:45] <Darkside> heh
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[01:47] <Darkside> VK5FDCQ: hi
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[01:48] <VK5FDCA> Hi
[01:50] <Darkside> Hi Dominic
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[01:51] <VK5FDCA> Hey, Who is Darkside?
[01:51] <VK5FDCA> and G'day Adam
[01:52] <Darkside> i am VK5FDRK
[01:53] <Darkside> i'm in the car with VK5VZI, heading back to VK5GH's place
[01:53] <Darkside> payload is all recovered
[01:54] <VK5FDCA> :) cool
[01:55] <Darkside> 33588m altitude
[01:56] <Lunar_Lander> yea
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[02:36] <vk3zyc> well done guys, no telemetry rxed here this time, big hill ( mt Baw Baw in the way)
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[02:44] <NigeyS> ach need sleep or wont be launching anything tomorrow, night all !
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[07:38] <juxta> ping Darkside
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[08:19] <fsphil> brrr it's cold this-morning
[08:22] <number10> you must have been outside walking the dog then
[08:23] <fsphil> nope still indoors :)
[08:24] <fsphil> going through my list of things not to forget...
[08:24] <Upu> you still launching fsphil ?
[08:25] <fsphil> think so Upu, it's quite nice other than it being cold
[08:25] <fsphil> the wind has calmed right down
[08:25] <Upu> very similr to when you last launched hre
[08:25] <Upu> here
[08:25] <Upu> i.e bins and stuff flying past the window
[08:25] <fsphil> haha, the prediction is eerily similar too
[08:25] <Upu> link
[08:26] <fsphil> one sec .. it's landing near Richmond
[08:27] <fsphil> http://habhub.org/predict/#!/uuid=c23520fb1b7a4aecbf2fe9eee78972913c7bd2d8
[08:27] <fsphil> it's pretty far from you
[08:27] <Upu> still going for 13:00 launche ?
[08:28] <fsphil> ish
[08:28] <fsphil> +/- 1 hour
[08:28] <fsphil> very unlikely +
[08:28] <fsphil> that would push it too late to get good pics
[08:30] <Upu> I think recovery is out really mainly because its going to be dark
[08:32] <fsphil> same prediction for next sunday: http://habhub.org/predict/#!/uuid=50a16cf787ab51a61a3f3ea2aedec54efce61f28
[08:32] <fsphil> hehe
[08:33] <Upu> not been calm for a few weeks
[08:33] <Upu> ok best go walk the dog
[08:34] <number10> hope it calms down the week after as off to the lakes again
[08:34] <fsphil> it might be worth waiting until next weekend then - as I can launch much earlier in the day
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[09:50] <fsphil> poo, I've lost a battery holder
[09:53] <fsphil> I've done two of these things, you'd think I'd be better organised by now :)
[09:54] <number10> must be stressed before launch
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[09:58] <fsphil> annoying mostly, knowing I have a box of 10 of these somewhere but no idea where
[09:59] <fsphil> I've also got to go into the office shorty for some server updates
[09:59] <fsphil> I'm not sure I'm going to be ready in time
[10:00] <fsphil> Leaning towards delaying until next weekend
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[10:11] <daveake> I might be launching next weekend.
[10:11] <daveake> I could chase your payload and someone in Holland could chase mine for me :p
[10:12] <number10> launching from home daveake?
[10:12] <daveake> That's the current plan
[10:13] <daveake> However .... if that results in a North Sea landing then I might want to launch from Cambs instead!
[10:13] <daveake> I'll see what the prediction says midweek
[10:13] <daveake> brb
[10:13] <fsphil> lol
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[10:14] <fsphil> yea, I'm delaying
[10:14] <LazyLeopard> Another day, then?
[10:14] <LazyLeopard> It's certainly fairly windy and wild down here.
[10:15] <fsphil> it's actually a brilliant day here
[10:15] <fsphil> the wind has calmed right down, the sun is out and the sky is blue
[10:17] <LazyLeopard> The sun's out now, butthe wind's quite blustery in moments.
[10:19] <fsphil> yea yesterday and overnight it was wild here, I had to lower my HF vertical
[10:19] <LazyLeopard> Hmmm...
[10:20] <LazyLeopard> Left mine both up, but the one near the house has been flapping about rather a lot.
[10:24] <LazyLeopard> I think it might need a little extra guying.
[10:24] <LazyLeopard> No HAB flights to track today, then.
[10:25] <fsphil> this could try a weather sonde :)
[10:25] <fsphil> er, not sure where the word this came from in that sentence
[10:27] <LazyLeopard> Heh. ;)
[10:28] <Darkside> hey all
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[10:29] <fsphil> hullo Darkside
[10:29] <fsphil> looks like you had a good flight today
[10:31] <Darkside> yep
[10:31] <Darkside> was good fun
[10:33] <Darkside> http://www.facebook.com/media/set/?set=a.10150414108471855.378755.22062606854&type=3&l=bb8efcd5a5
[10:33] <LazyLeopard> Ah well, saves me sticking the yagi outside in the blustery stuff. Don't think I'll be up a ladder trying to add support to the HF antenna eother. ;)
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[10:35] <fsphil> you seen it landing Darkside?
[10:35] <Darkside> i didn't
[10:35] <Darkside> but the other team did
[10:35] <Darkside> we have video of it landing
[10:35] <fsphil> you keep doing that lol
[10:36] <Darkside> lol
[10:37] <fsphil> You'll catch it one of these days
[10:42] <Darkside> i think terry almost did that
[10:42] <fsphil> http://www.flickr.com/photos/fsphil/6410573371
[10:43] <fsphil> not exactly a tiny circuit board
[10:44] <Darkside> my net is shaped
[10:44] <Darkside> cant look atm
[10:44] <fsphil> aah
[10:44] <Darkside> ok that is weird foam
[10:45] <fsphil> yea it's house insulation
[10:45] <fsphil> works really well
[10:47] <Darkside> cool
[10:48] <fsphil> can't wait to see the fab'ed pcb against it
[10:52] <Upu> hello
[10:52] <Upu> not launching fsphil ?
[10:54] <fsphil> nope - I've totally lost all the aa battery holders
[10:54] <fsphil> turned the house upside down
[10:54] <fsphil> and have to go into work shortly
[10:54] <Darkside> solder to the batteries!
[10:54] <Darkside> oh yeah
[10:55] <Darkside> i found a crushed lithium AA in my backpack today
[10:55] <Darkside> that was interesting
[10:55] Action: fsphil needs a spot welder
[10:55] <fsphil> euu!
[10:55] <fsphil> did it leak everywhere?
[10:55] <Darkside> nope
[10:55] <Darkside> it hadn't shorted i guess
[10:55] <fsphil> Upu, I'll give it another go next week. I can order some of the holders
[10:55] <fsphil> you about next weekend?
[10:56] <fsphil> at least I'll be able to launch in the morning
[10:58] <Upu> free all weekend
[10:58] <Upu> just tell me when and where
[10:58] <Upu> and launch early
[10:58] <fsphil> it'll be as early as possible, I'm going to aim for 9am
[10:58] <Upu> perfect I'm in
[10:58] <fsphil> all the predictions still have it landing just east of the dales, but you know how that can change in a week
[10:59] <Upu> aye we can see
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[11:00] <fsphil> the notam ends the weekend after that, so I'll probably launch the 1600g in two weeks
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[11:01] <fsphil> righty, need to get to work. bbl!
[11:18] <NigelMoby> hmm
[11:18] <NigelMoby> to picochu or not.
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[11:47] <fsphil> NigelMoby, someone needs to launch today ;)
[11:47] <fsphil> though if it's still a bad prediction I wouldn't
[11:48] <NigelMoby> I'm going to take it to the sure, assume a launch but vase it on a 3pm prediction, if its still within 15 miles of heathrow ill delay a day.
[11:48] <NigelMoby> wire*
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[11:50] <fsphil> yea, heathrow ain't worth it
[11:50] <NigelMoby> tomorrow has it going on almost the same path as Picochu-2 but slow windier tomoz, 20mph.
[11:50] <NigelMoby> a lot*
[11:50] <NigelMoby> fkin android keyboard :@
[11:51] <fsphil> aye
[11:51] <fsphil> cpc's very slow today -- trying to order battery holders
[11:51] <NigelMoby> would like to avoid an air space incursion today though lol
[11:52] <NigelMoby> Bah I got loads of battery holders here too.
[11:52] <fsphil> typical lol
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[11:52] <fsphil> did you get those crystals?
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[11:53] <NigelMoby> not get. I paid the 1.12 they get sent back out Monday I think.
[11:53] <NigelMoby> yet*
[11:54] <fsphil> still don't understand that -- it wasn't any bigger than a letter
[11:54] <fsphil> and they weight virtually nothing
[11:54] <NigelMoby> might be sommit else, but I dnt think I've ordered anything that's due.
[11:55] <fsphil> well they would definitely have arrived by now so it must be them
[11:55] <NigelMoby> possible the stamps come off. had that happen b4
[11:56] <fsphil> I licked it pretty good lol
[11:56] <NigelMoby> lol ooerr Mr
[11:57] <fsphil> they're the self adhesive ones, so if it fell of it's the post offices fault ;)
[11:57] <NigelMoby> lol Yush!
[11:58] <NigelMoby> Phil can u run a prediction for me?
[11:58] <fsphil> aye
[11:59] <fsphil> what parameters?
[11:59] <NigelMoby> 2.5 asc 1.0 des 7km burst 3.30pm
[11:59] <fsphil> launch coords?
[12:00] <NigelMoby> err 2 secs
[12:02] <NigelMoby> ffs how do I get my dam phone to gimme my coordinates lol
[12:02] <fsphil> which street? I have spot on the map
[12:02] <fsphil> splott
[12:03] <LazyLeopard> fsphil: Got caught by the 5mm thicknes limit for ordinary letters?
[12:03] <NigelMoby> moorland road in splott
[12:03] <NigelMoby> hey lazy
[12:04] <LazyLeopard> If it's over 5mm thick they do you for a "large letter" which is a chunk more...
[12:04] <fsphil> 5mm?? hmm.. it would be close
[12:04] <NigelMoby> robbing gits
[12:04] <LazyLeopard> ...and I've had them hold something just a fraction over 5mm for ransom.
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[12:05] <NigelMoby> the 12p I dnt mind, its the 1quid admin charge that's annoyed me.
[12:05] <fsphil> that's exactly it ... large letter second class is 12p more than a first class stamp
[12:05] <fsphil> aaarh!
[12:05] <NigelMoby> lol
[12:06] <fsphil> I put a piece of cardboard around them, bet that's brought it to like 6mm or something
[12:06] <NigelMoby> lol Nm
[12:07] <fsphil> http://habhub.org/predict/#!/uuid=10db2b68d9d0dbcd0ea9326f64656e261b5252e2
[12:07] <LazyLeopard> The 12p would be the difference between 46p for a normal first class letter, and 58p for a second class large letter.
[12:07] <NigelMoby> Ta Phil
[12:07] <fsphil> landing in Ascot, yay
[12:08] <LazyLeopard> It's the eight quid service charge they levy for collecting duty on packages from overseas that gets me even more.
[12:08] <NigelMoby> hmm hounslow
[12:10] <fsphil> betcha when I go home I find the battery holders
[12:11] <fsphil> and what are the odds it'll snow next weekend
[12:11] <NigelMoby> lol
[12:12] Action: fsphil is very optimistic :)
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[12:17] <TimZaman> hi
[12:17] <NigelMoby> well at least that prediction avoids luton airport.
[12:17] <NigelMoby> hey Tim.
[12:17] Action: fsphil broke the cpc website :)
[12:17] <fsphil> hi hi TimZaman
[12:18] <TimZaman> testing my ntx2 usb stick now
[12:18] <TimZaman> also have my ntx2-xbee in
[12:18] <NigelMoby> Oo Nicey
[12:20] <fsphil> ntx2 usb stick?
[12:21] <TimZaman> just a usb port at one end, sma at the other
[12:21] <TimZaman> 3x5cm footprint
[12:21] <TimZaman> better than a friggin ftdi breakout and all that
[12:22] <fsphil> indeedy
[12:22] <TimZaman> just nice to have lieing around
[12:22] <fsphil> you putting on an audio codec IC or serial?
[12:22] <TimZaman> the ntx2-bee would be more handy though
[12:22] <TimZaman> ill do that in a second
[12:22] <TimZaman> serial?
[12:24] <Darkside> fsphil: ooh
[12:24] <Darkside> thats an idea
[12:24] <fsphil> ain't it :)
[12:24] <Darkside> usb hub IC, PCM2900B, and a ftdi chip
[12:24] <Darkside> hmm
[12:25] <Darkside> you'd need to bias the audio into the NTX2 properly though
[12:25] <Darkside> actually meh
[12:25] <Darkside> i'd really want a transceiver for that to be useful
[12:25] <fsphil> yea
[12:26] <fsphil> but there's potential there
[12:26] <Darkside> TimZaman: why do you need a transmitter on a usb stick?
[12:26] <TimZaman> i am so happy with the ntx2 stick
[12:26] <TimZaman> works in one go
[12:26] <Darkside> whats the point to it?
[12:26] <TimZaman> oh i love it when a PCB comes together
[12:27] <TimZaman> Darkside: makes beagleboard perhipials -to- ntx2 easier
[12:27] <Darkside> uhh
[12:27] <Darkside> doesnt the beagleboard have GPIOs
[12:27] <Darkside> adding more crap to USB just increases the current consumption
[12:27] <TimZaman> Thats certainly not the problem
[12:27] <TimZaman> USB makes interfacing easy
[12:27] <TimZaman> GPIO's make crap difficult and static
[12:27] <TimZaman> and increases wiring
[12:28] <Darkside> i would say the main problem at the moment is working out why the beagleboard failed twice
[12:28] <TimZaman> Darkside: Very true
[12:28] <gonzo_> gd arvo all
[12:28] <TimZaman> i did log everything though
[12:28] <Darkside> so what happened?
[12:28] <TimZaman> so indeed, good point Darkside
[12:28] <TimZaman> i knew that it would fail though
[12:28] <TimZaman> thats why i had two payloads
[12:28] <Darkside> get that sorted out before you do *anything* else
[12:28] <gonzo_> what's the wx like for a launch phil?
[12:28] <TimZaman> Darkside: oh come on this is a hobby
[12:28] <Darkside> TimZaman: srs
[12:28] <fsphil> gonzo_, postponed
[12:28] <TimZaman> i feel like soldering today, so let me
[12:28] <gonzo_> wind?
[12:28] <Darkside> i'm hoping to fly a beaglebone next
[12:29] <Darkside> but i've got a shitload of work to do first
[12:29] <TimZaman> Darkside: i did preorder mine
[12:29] <TimZaman> Darkside: also a pandaboard
[12:29] <Darkside> gonna have to get the thing tested in a temp chamber
[12:29] <fsphil> gonzo_, actually very nice here - but it would be landing in the dark - plus I lost the battery holders ;)
[12:29] <Darkside> i don't want to have it fail at 12km...
[12:29] <gonzo_> hehe, it happens!
[12:29] <fsphil> next week is looking much better
[12:29] <fsphil> and I don't have the issue of fixing the payload the night before
[12:30] <fsphil> it's all ready to go
[12:30] <fsphil> apart from the batteries
[12:30] <Darkside> TimZaman: the idea with the beaglebone launch i want to do is to try and do 9600 baud AX25 communication to/from the payload
[12:30] <gonzo_> night before?! What's wrong with bug fiving whilst it's on the full balloon
[12:30] <Darkside> most likely using a cheap handheld radio (or a transceive module)
[12:30] <fsphil> is 9600 baud ax.25 done over FM again?
[12:30] <Darkside> yeah
[12:30] <Darkside> well, it can be
[12:31] <fsphil> lol gonzo_, that's TimZamans job :)
[12:31] <gonzo_> hehe
[12:31] <Darkside> cool thing is we already have the ground transveivers for it
[12:31] <Darkside> transceivers*
[12:31] <Darkside> a bunch of guys on the horus team for Kenwood TH-D72s
[12:31] <Darkside> a handheld radio that has an inbuilt 9600 baud packet modem
[12:31] <fsphil> nice
[12:32] <fsphil> the 817 has an option in the menu for 9600 baud, but it doens't seem to do anything
[12:32] <Darkside> while it would make it easier, i'm not going to fly one of those
[12:32] <Darkside> fsphil: i think it widens the receive filter
[12:32] <fsphil> 9600 would be great though .. just not going to happen with 10mw
[12:32] <gonzo_> phil, that option just selecs the port that is uised for the tx
[12:32] <Darkside> ahh
[12:33] <fsphil> aah gotcha
[12:33] <Darkside> aaaanyway, to be able to do AX25 off the beaglebone, i'm going to have to add on a I2S audio chip
[12:33] <Darkside> because the beaglebone doesn't have onboard audio
[12:33] <fsphil> I sort of hoped it would widen the USB bandwidth when I first seen it :)
[12:34] <NigelMoby> that'll be fun darkside
[12:34] <Darkside> i think i'll end up designing a kind of HAB shield for the beaglebone
[12:36] <Darkside> so audio in/out, IOs for PTT, that kind of thing
[12:36] <Darkside> and serial ports and stuff, temp sensors, blah blah blah
[12:36] <Darkside> 3.3v IO makes all this easy too
[12:36] <NigelMoby> Phil I'm in the same boat as you...
[12:36] <Darkside> the problem is going to be A) software reliability
[12:36] <NigelMoby> can't find the aaa holder!!!
[12:36] <Darkside> and B) power consumption
[12:37] <Darkside> because i am not flying LiPos
[12:37] <NigelMoby> lipos love you...lol
[12:37] <Darkside> lipos die.
[12:37] <NigelMoby> oh yes that they do!
[12:37] <Darkside> this thing will probably be running off either 6 or 8 AA lithiums
[12:37] <Darkside> the question will be how long can it run for
[12:38] <NigelMoby> hmm good q
[12:38] <gonzo_> from mem, the 817 has two data rx outputs at the data connector. One is filtered audio, the other is straight from the discriminalor. They both are live on FM (and recon the AF one os live on all modes)
[12:38] <Darkside> gonzo_: interesting
[12:38] <Darkside> still, fsphil has his funcube dongle if he wants wideband USB :P
[12:38] <Darkside> on >55MHz anyway
[12:39] <fsphil> funcube needs filters
[12:39] <gonzo_> the 1200/9600 selection changed the gain on the modulation input. But if it's like the others in the range, always goes straight to the varicap for direct FM mod
[12:39] <Darkside> fsphil: ahh yes, i was working on that wasn't I
[12:39] <fsphil> I plugged it into my colinear and it couldn't hear anything :)
[12:39] <Darkside> i have those SAW filters sitting in a bag on my desk
[12:39] <Darkside> but god damn those things are tiny
[12:39] <fsphil> it could hear the broadcast FM stations but nothign else
[12:39] <NigelMoby> Hm how long can I make a cable for external temp sensor?
[12:39] <fsphil> suspect they where massivly overloading it
[12:40] <Darkside> NigelMoby: don'y go any longer than 15cm or so
[12:40] <NigelMoby> Eek
[12:40] <Darkside> you shouldnt need any longer than that
[12:40] <gonzo_> the fcd is an excellent little device, but does need an lna and filter
[12:40] <NigelMoby> was thinking of 1m
[12:40] <Darkside> NigelMoby: no.
[12:40] <NigelMoby> dam, wanted it right up on the balloon.
[12:40] <Darkside> i don't think onewire is specced for that distance
[12:40] <Darkside> heh
[12:40] <Darkside> be careful with payloads close to balloons
[12:41] <fsphil> but yea I do love my fcd :)
[12:41] <Darkside> you've seen the horus 17 launch NigelMoby ?
[12:41] <fsphil> I was able to track a radosonde with one
[12:41] <NigelMoby> Yup, its a foil balloon to.
[12:41] <gonzo_> I've modded my 817 to bring out the IF at 63(?) meg and can feed that into the FCD
[12:42] <Darkside> gonzo_: Niiiiiiiiice
[12:42] <fsphil> gonzo_, oooh
[12:42] <fsphil> I dare not open my 817, but that's cool
[12:42] <gonzo_> makes an excellent spectraum pan adapter
[12:42] <gonzo_> works really well
[12:42] <NigelMoby> ok I think just Gaffa tape it to the nylon braid then, at 10cm
[12:43] <gonzo_> mine's well out of warrantee, so went for it. Drilling the hole in the back takes courage though
[12:43] <Darkside> heh
[12:43] <Darkside> so you just have a direct tap into the IF?
[12:43] <Darkside> or does it go via a 10k resistor or something
[12:43] <Darkside> i'd be afraid of deafening the receiver
[12:43] <gonzo_> what the one-wire comms? Dallas chips?
[12:43] <Darkside> yeah
[12:43] <Darkside> DS18B20s are a commonly used temp sensor
[12:44] <Darkside> i'm still yet to see how linear they are at extreme low temps though
[12:45] <gonzo_> it does damp the RX down a little, probably due to the FCD and cables causing a mismatch in to the filter
[12:45] <Darkside> yeah
[12:45] <Darkside> we do the reverse in one of our chase cars
[12:45] <Darkside> we have a HF SDR, a RFSpace SDR-IQ
[12:45] <gonzo_> but it's so far down the chain, youy just turn the vol up a bit. It don't affect the snr of signals
[12:45] <Darkside> and that takes the 10.7MHz IF from a Icom IC-R7000
[12:46] <Darkside> the IC-R7000 is one of the most sensitive receivers i know of
[12:46] <gonzo_> I used to have one too, and was always impressed
[12:46] <Darkside> but even still, its great to be able to see the waterfall display
[12:46] <Darkside> i've piched stuff out on that that i would have missed by ear
[12:47] <gonzo_> yep, I have the aor5000 and sdr-iq
[12:47] <Darkside> and the SDR-IQ has a 192KHz bandwidth, which is nice
[12:47] <Darkside> nooooice
[12:47] <Darkside> AOR5000s are a nice bit of kit
[12:47] <gonzo_> and agree, you can't operate without seoc display
[12:47] <gonzo_> spec
[12:47] <Darkside> hehe
[12:47] <Darkside> well, you can...
[12:47] <gonzo_> after having used one
[12:47] <Darkside> but it helps to have it
[12:47] <Darkside> when hunting analog sondes it helps so much
[12:48] <Darkside> the analog sondes are WFM, and you have to DF on USB
[12:48] <gonzo_> I was going to make a converter down to 10.7meg for the 817, but then the FCD came along. Far neater soln]
[12:48] <Darkside> and each of the carriers you hear on USB are about 4KHZ apart, so you can be right between 2 of them an dmiss it
[12:48] <gonzo_> I do have a converter on the 847, so can run that on the sdr-iq. Again, exeptionally ueful.
[12:48] <Darkside> what i do now is increase the FFT length on spectravue
[12:49] <Darkside> i now just watch the waterfall display for the signal
[12:49] <Darkside> then i switch to DFing by ear
[12:49] <Darkside> http://pipe2.darklomax.org/pics/2011-05-21_Foxhunting_Prep/
[12:50] <Darkside> gonzo_: ^
[12:50] <gonzo_> a good display is useful for df'ing, as you can see a dB of signal change, well before the ear will detect it
[12:50] <Darkside> we use Icom IC-R10s mainly for DFing
[12:50] <Darkside> as it has a proper variable gain knob for sideband
[12:53] <gonzo_> is that a modern version of the datong DF unit?
[12:53] <Darkside> no, its a custom one, was designed by the owner of that truck for the local police
[12:53] <Darkside> 2.5KHz rotation rate
[12:54] <Darkside> most units are 300hz
[12:54] <Darkside> the unit is still getting a bit dated now, it uses a M68K
[12:55] <Darkside> anotehr guy in our team has a new version designed up which does the same thing using AVRs
[12:55] <gonzo_> can't remember if the datong units were possibly analoghr
[12:55] <gonzo_> e
[12:56] <Darkside> mmm dunno
[12:56] <Darkside> this one works quite nicely though
[12:56] <Darkside> we use the audio output from teh R7000 to drive it
[12:56] <fsphil> always liked 68k assembly :)
[12:56] <Darkside> but it also has inbuilt receivers
[12:56] <gonzo_> seeing if I can find a pic of a friends range rover
[12:57] <gonzo_> 15antennas on the roof
[12:57] <fsphil> !!
[12:57] <Darkside> haha
[12:57] <fsphil> my record is one :p
[12:57] <Darkside> nice
[12:57] <gonzo_> all drilled through
[12:57] <Darkside> i think the landcruiser has about 10
[12:57] <Darkside> actually
[12:57] <Darkside> more
[12:57] <Darkside> 8 for the doppler unit, + whatever else
[12:57] <fsphil> sorry, two if you count the car radio antenna
[12:59] <fsphil> last time I was up the mountain I got bbc radio scotland which was nifty
[12:59] <Darkside> oh yeah, we were seeing APRS packets from tasmania today
[12:59] <Darkside> 800km path
[12:59] <fsphil> yikes
[12:59] <Darkside> there was some epic ducting going on
[13:00] <fsphil> ooh I must setup my igate, see if anything's happening here
[13:00] <fsphil> not ducting, but local
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[13:00] <Darkside> hmm i'd better get into bed
[13:00] <Darkside> 11:30pm, and i have things to do tomorrow
[13:01] <fsphil> ah yea, fractional timezone
[13:02] <Darkside> +10.5
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[13:05] <TimZaman> launch?
[13:06] <fsphil> none today :(
[13:06] <NigeyS> definately not mine with this prediction! lol
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[13:16] <TimZaman> ntx2 bee works like crazy
[13:16] <TimZaman> :)
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[13:19] <Darkside> nn
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[17:54] <jcoxon> evening all
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[17:55] <Paradoxial> Evening jcoxon
[17:57] <NigeyS> evening James
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[19:43] <Lunar_Lander> hello
[19:43] <Lunar_Lander> we had no flight today, right?
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[19:57] <nosebleedKT> Lunar_Lander: send me the old flight system code
[19:57] <nosebleedKT> it was a stable backup
[19:57] <Lunar_Lander> yea
[19:57] <Lunar_Lander> the whole RAR file?
[19:57] <nosebleedKT> I get many errors with current software
[19:57] <nosebleedKT> yes
[19:58] <nosebleedKT> i should create a repo. I cant manage alone anymore
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[20:00] <Lunar_Lander> OK one moment
[20:03] <nosebleedKT> send them in my mail
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[20:04] <Lunar_Lander> hi GW8RAK
[20:05] <nosebleedKT> btw, the board got 2 defects. 1st, you cant use the RED light of the RFB LED. 2nd, radio is drawing current directly from batteries which could cause trouble.
[20:05] <Lunar_Lander> oh
[20:05] <Lunar_Lander> OK, problem 1 would be in case of error there would be no red light?
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[20:06] <nosebleedKT> you have someone there to solder smd for you ?
[20:06] <SpeedEvil> http://www.framos-imaging.com/toshiba_teli_cameralicscqs15bc23.html for example
[20:07] <Lunar_Lander> I can ask
[20:07] <Lunar_Lander> there is surely someone who can help
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[20:07] <SpeedEvil> oops
[20:07] <GW8RAK> Hi Lunar_Lander
[20:07] <nosebleedKT> Lunar_Lander: i tell you because i plan to make new board and send you a couple.
[20:07] <Lunar_Lander> Revision H?
[20:07] <GW8RAK> How to build a satellite on BBC2 now
[20:07] <nosebleedKT> Yes
[20:07] <Lunar_Lander> ah
[20:08] <nosebleedKT> and i will remove JST battery support
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[20:08] <nosebleedKT> are you ok with that?
[20:09] <nosebleedKT> current board works just fine. But i dont take it seriously to put it on a HAB.
[20:09] <Lunar_Lander> yea, should be OK
[20:09] <Lunar_Lander> did you get the mail?
[20:09] <Lunar_Lander> GW8RAK: thanks for the info, I'll check onlinetvrecorder later for it
[20:09] <nosebleedKT> Lunar_Lander: yes
[20:11] <GW8RAK> Being BBC, it may not be available outside the UK
[20:12] <Lunar_Lander> onlinetvrecorder has it
[20:12] <Lunar_Lander> :)
[20:12] <darknesslord_> CW8RAK How I wish to be at UK this moment. I really like to watch that episode :(
[20:14] <GW8RAK> That's good Lunar.
[20:14] <GW8RAK> darknesslord_ where are you?
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[20:20] Nick change: darknesslord_ -> israelzuniga
[20:20] <israelzuniga> GW8RAK I'm from Mexico.
[20:21] <GW8RAK> Another country. Welcome
[20:21] <SpeedEvil> Darkside: what is the program name?
[20:21] <SpeedEvil> Welcome Mexico!
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[20:22] <israelzuniga> So, the only way to see BBC is using TOR service... :/
[20:22] Action: SpeedEvil ponders comments about cross-border flights, and decides against.
[20:22] <israelzuniga> SpeedEvil Thank you!
[20:22] <Lunar_Lander> does someone know the film "This is England"?
[20:22] <SpeedEvil> No clue what the legalities in mexico are - I imagine that will be a concern of the aviation autorities though.
[20:24] <GW8RAK> israelzuniga, it might be worth looking at bbc.co.uk and iplayer. It may be available on there
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[20:27] <SpeedEvil> he's in mexico
[20:27] <israelzuniga> SpeedEvil : mexican government is HAB friendly. In spite the violence in some cities. Last week was the SARSEM ICARUS III launch ( craeg.remtronic.com )
[20:27] <SpeedEvil> Interesting!
[20:27] <jcoxon> israelzuniga, yeah i saw that launch - awesome
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[20:28] <israelzuniga> GW8RAK I'll check later with iplayer.
[20:28] <GW8RAK> Satellite programme - 100W o/p at 35000km. Not as efficient as HAB transmissions
[20:29] <GW8RAK> Good luck
[20:33] <Lunar_Lander> israelzuniga: cool I found the youtube videos from the flight
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[20:35] <SpeedEvil> http://fatpita.net/?i=3261
[20:35] <SpeedEvil> Sort-of-on-topic.
[20:38] <Lunar_Lander> israelzuniga: are there six parts of onboard video on youtube?
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[21:02] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[21:02] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk
[21:02] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[21:05] <GW8RAK> That was quite a good programme. Not dumbed down as the BBC usually does science
[21:05] <Lunar_Lander> yea
[21:05] <Lunar_Lander> is Brian Cox good?
[21:06] <Lunar_Lander> he usually does space research stuff on BBC
[21:07] <GW8RAK> Brian Cox is good.
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[21:08] <GW8RAK> And now Frontline Medicine. A fascinating programme
[21:09] <Lunar_Lander> cool
[21:10] <Lunar_Lander> GW8RAK: did you try working with the magnetometer again?
[21:12] <GW8RAK> Not yet Kevin, been working hard and haven't had much time. Hope to get to it this week. More testing needed
[21:13] <Lunar_Lander> yeah
[21:13] <Lunar_Lander> as I said I tried to get inductors at the local parts store but they didn't have any and he couldn't say when they would have them back in stock
[21:15] <GW8RAK> I did try to measure the inductance of the inductors, but had a lot of trouble. There's a lot of interaction between the two coils
[21:20] <Lunar_Lander> that doesn't sound good
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[21:21] <GW8RAK> Don't know. The coils are meant to interact, but it makes it difficult to measure the resulting values
[21:23] <Lunar_Lander> yea
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[21:29] <nosebleedKT> Lunar_Lander: bugs solved
[21:29] <Lunar_Lander> cool!
[21:29] <nosebleedKT> I use RGB with 3 PWMs
[21:29] <nosebleedKT> and those PWM mess arround with timers
[21:29] <Lunar_Lander> yes
[21:29] <nosebleedKT> and timers mess arroun with AFSK
[21:29] <nosebleedKT> so i just use digitalWrite(pin, HIGH/LOW)
[21:30] <nosebleedKT> instead of analogWrite(pin, 0-255)
[21:30] <nosebleedKT> and that enables RED to play ok
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[21:30] <nosebleedKT> i really dont know why i wired 3 PWMs to RGB leds
[21:31] <nosebleedKT> so i might not make new board
[21:31] <Lunar_Lander> yeah
[21:31] <Lunar_Lander> wb daveake
[21:33] <daveake> dodgy interweb here
[21:33] <Lunar_Lander> yea
[21:33] <Lunar_Lander> I just found something funny
[21:33] <Lunar_Lander> if you know Portal and Portal 2?
[21:34] <nosebleedKT> Lunar_Lander: but be sure to use the stepup which provides stable 5v output
[21:34] <Lunar_Lander> yeah
[21:34] <Lunar_Lander> what do I have to to exactly?
[21:34] <nosebleedKT> buy a 5v stepup from sparkfun :P
[21:35] <nosebleedKT> and move the switch to use it :)
[21:36] <Lunar_Lander> yea
[21:36] <Lunar_Lander> stepup gives 0 results on SFE :(
[21:37] <nosebleedKT> lol
[21:37] <nosebleedKT> wait
[21:38] <nosebleedKT> http://www.sparkfun.com/products/8999
[21:38] <Lunar_Lander> thanks
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[21:51] <nosebleedKT> people gnite! im off!
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[21:52] Action: fsphil finally escaped the office
[21:55] <Lunar_Lander> YAY
[21:56] <daveake> IF I can get some time to build a payload, and IF the weather next weekend is OK, there could be 2 of us launching :)
[21:56] <daveake> Current projection could have a landing near Bruges ... I quite fancy having a channel hop to retrieve :)
[21:57] <daveake> fsphil Your payload is on .075, correct?
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[22:16] <fsphil> ah, missed him
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[22:19] <Lunar_Lander> NigeyS: are you here?
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[22:27] <mattltm> Who built the current spacenear.us tracker?
[22:27] <fsphil> natrium42 did the web interface
[22:28] <mattltm> cool. Thats who I need to talk to then :)
[22:29] <Lunar_Lander> HEY mattltm
[22:29] <mattltm> Hi Lunar_Lander
[22:30] <Lunar_Lander> how are you?
[22:30] <mattltm> Good thanks.
[22:30] <mattltm> You?
[22:31] <Lunar_Lander> me too, thank you
[22:31] <Lunar_Lander> :)
[22:31] <Lunar_Lander> what are you up to?
[22:31] <mattltm> Not much.
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[22:35] <cellkyborg> Hello guys
[22:35] <cellkyborg> I have a quick question
[22:36] <cellkyborg> I started researching about high altitude balloons
[22:36] Action: fsphil starts the timer
[22:36] <SpeedEvil> He ran out on mine 8 seconds ago.
[22:36] <cellkyborg> And my question would be: what gps modules would you recommend for start?
[22:37] <Darkside> ublox
[22:37] <Darkside> anything with a ublox chipset
[22:37] <fsphil> anything with ublox :)
[22:37] <cellkyborg> any reasoning?
[22:37] <Darkside> cellkyborg: many gps modules are altitude capped
[22:37] <cellkyborg> Yes, i know that
[22:37] <Darkside> ublox modules are tried and tested, and we know they work up to 50km altitude
[22:38] <Darkside> the other common module is the Lassen-IQ, but they have quite insensitive receivers
[22:38] <Darkside> the ublox gains lock faster, and just works better
[22:38] <cellkyborg> Ok :)
[22:39] <Darkside> but you do have to put the ublox module into 'airborne' mode
[22:39] <cellkyborg> I assume most of them support RS232
[22:39] <Darkside> no, they'll be TTL most likely
[22:39] <Darkside> what are you talking to that needs RS232?
[22:39] <cellkyborg> oh
[22:39] <Laurenceb_> http://diydrones.com/profiles/blogs/adns3080-optical-flow-sensor-now-available-in-the-diydrones-store
[22:39] <Laurenceb_> sweet
[22:40] <Darkside> cellkyborg: do you want the GPS to talk to a tinytrak or something?
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[22:41] <cellkyborg> I'm not for anything specific at the moment
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[22:42] <Lunar_Lander> xD fsphil
[22:45] <fsphil> most gps modules are ttl
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[22:58] <cellkyborg> How should one choose from different ublox modules/chips the right one? They seem similar to me
[23:06] <Upu> just got for the uBLOX 6
[23:06] <Upu> http://ukhas.org.uk/guides:ublox6
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[23:19] <gonzo_> what sort of price are they upu?
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[23:19] <cellkyborg> 75euro from ublox.com
[23:20] <gonzo_> yjay's a lot!
[23:20] <gonzo_> that's
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[23:20] <Upu> god no
[23:20] <Upu> £17.50 ex VAT for the module
[23:21] <Upu> about £6.50 ex VAT for the Antenna
[23:21] <gonzo_> that's more like it!
[23:21] <cellkyborg> http://shop-emea.u-blox.com/abashop?s=274&p=productdetail&sku=785
[23:22] <Upu> yeah ignore that
[23:22] <cellkyborg> Where do you order them from? :)
[23:22] <Upu> www.alphamicro.net
[23:23] <Upu> bear in mind they are surface mount components and you'll need to solder them
[23:23] <Upu> but there is a break out board design if you want to use it
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[23:31] <cellkyborg> anyone know a good source about the weather up there?
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[23:40] <Lunar_Lander> cellkyborg: are you still there?
[23:40] <cellkyborg> yes
[23:40] <Lunar_Lander> do you mean in terms of the devices in the balloon or to forecast where the landing will be?
[23:41] <Darkside> cellkyborg: http://habhub.org/predict/ for flight path predictions
[23:42] <cellkyborg> well, I want to know general conditions like temp, weather direction and strenght
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[23:42] <Darkside> ahh there was some good info on temp somewhere, i can't remember the page
[23:42] <Darkside> in short, as you increase in altitude to 12km or so, the temp drops - 12km altitude is the tropopause, where the atmosphere is coldest
[23:43] <Darkside> then above that it warms up
[23:43] <Lunar_Lander> due to the ozone reaction
[23:43] <Lunar_Lander> you can get back to near zero at 30 km
[23:43] <Lunar_Lander> wind usually is very fast near 12 km
[23:44] <Darkside> cellkyborg: http://rfhead.net/?p=372
[23:44] <Darkside> have some graphs
[23:44] <SpeedEvil> day/night may make a difference that I don't know of.
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[23:45] <Darkside> the temperature graph is internal temp btw
[23:46] <Lunar_Lander> and usually you have the same wind profile on ascent and descent
[23:46] <Lunar_Lander> when you come back down, the payload may take the same directions as on the way up
[23:48] Action: NigeyS throws a sponge at Darkside
[23:48] <NigeyS> give me back my satellites! :p
[23:48] <Lunar_Lander> xD
[23:49] <Darkside> NigeyS: whaaaa
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[23:51] <cellkyborg> thanks for info
[23:51] <NigeyS> my satellites have gone awol on this ublox..lol
[23:52] <Darkside> soudns like you borked the antenna
[23:52] <NigeyS> Darkside, also some useless trivia for you, most comms satellites contain at least 20KG of pure gold......
[23:52] <Darkside> we've found that the sarantel antennas are quite fragile
[23:52] <Darkside> NigeyS: sounds about right
[23:52] <NigeyS> noo theyre working, but the number of sats disappears in the telem, its on 0 but updating gps fine
[23:53] <Darkside> ok thats weird
[23:53] <NigeyS> slightly!
[23:53] <NigeyS> nav mode is set to airbourne
[23:53] <Darkside> tap into the serial line from the gps and check what its doing
[23:53] <SpeedEvil> might it be saying 10?
[23:53] <Lunar_Lander> NigeyS: you didn't fly today, right?
[23:54] <NigeyS> wondering if cause its in airbourne, it needs to be over x amount of sats to report a number
[23:54] <Darkside> http://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/308999_10150414108776855_22062606854_8342902_1989340879_n.jpg
[23:54] <NigeyS> SpeedEvil, definately not, i get 4 at most indoors
[23:54] <NigeyS> $$PicoChu-3,208,23:53:34,51.4869,-3.1474,69,0,6,24*3527
[23:54] <NigeyS> $$PicoChu-3,209,23:53:47,51.4868,-3.1474,68,0,6,24*45EC
[23:54] <NigeyS> perfectly good telem otherwise..lol
[23:54] <Darkside> should use that picture for promoting high altitude ballooning
[23:54] <SpeedEvil> Does it give sat info lines?
[23:54] <Darkside> lawl
[23:54] <SpeedEvil> GPerr
[23:54] Action: SpeedEvil forgets
[23:54] <NigeyS> Lunar_Lander, no kev, was to close to the main airports around london :/
[23:55] <Lunar_Lander> ohhh!
[23:55] <SpeedEvil> the alt/az/snr triplets
[23:55] <NigeyS> SpeedEvil, not sure, ill have a check
[23:55] <SpeedEvil> Darkside: That's a big filling nozzle.
[23:55] <Lunar_Lander> Darkside: you had another good recovery?
[23:55] <Darkside> yeah
[23:55] <Darkside> http://www.facebook.com/media/set/?set=a.10150414108471855.378755.22062606854&type=1
[23:56] <SpeedEvil> Congrats!
[23:56] <Darkside> those are pics taken by the band that we did the launch for
[23:56] <cellkyborg> what gas are you guys using? Helium or hydrogen?
[23:56] <Darkside> helium
[23:56] <Darkside> we'll switch to hydrogen only when we absolutely need to
[23:57] <cellkyborg> there aint much air up there, so no danger of going kaboom you know
[23:57] <jonsowman> it's the air on the ground that is the issue
[23:57] <SpeedEvil> But not much of one.
[23:57] <Darkside> it wouldn't explode
[23:58] <Darkside> but it would burn, raining burning fragments of latex all over the field we use as a launch site
[23:58] <SpeedEvil> The absolute worst-case if you don't have the balloon with lots of air when you start - is a flaming bit of latex thrown 10m or so, and a 1s long balloon diameter bonfire.
[23:58] <Darkside> i think you can see how that might be a problem
[23:58] <Darkside> SpeedEvil: and setting a field on fire, in our case
[23:58] <SpeedEvil> Oh - I forgot the whole australia thing.
[23:59] <SpeedEvil> The UK is rarely flammable.
[23:59] <Lunar_Lander> rofl
[23:59] <Darkside> at the moment we can afford helium
[23:59] <Darkside> so we'll stick with it until we are forced to switch
[00:00] --- Mon Nov 28 2011