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[06:03] <griffonbot> @AnthonyStirk: RT @daveake: Now front-page on the official Raspberry Pi site :-) http://t.co/eScHQMkD #hab #ukhas #raspberry_pi [http://twitter.com/AnthonyStirk/status/225833206019158016]
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[06:39] <UpuWork> morning
[06:40] <daveake> morning
[06:41] <daveake> need more sleep
[06:42] <UpuWork> well thats what happens when you spend all night googling yourself
[06:43] <daveake> It's worse
[06:43] <daveake> I watched a web TV thing
[06:43] <daveake> Live interview with Eben Upton (RPi designer)
[06:44] <daveake> and yes I got a mention
[06:44] <daveake> pictures and all
[06:45] <daveake> It was on "twit TV" which I found amusing :D
[06:48] <fsphil> haha
[06:48] <daveake> Video will be available sometime at http://twit.tv/show/triangulation/61
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[07:03] Nick change: nosebleedkt -> nosebleedkt_flyi
[07:03] Nick change: nosebleedkt_flyi -> nosebleedkt_fly
[07:03] Nick change: nosebleedkt_fly -> nosebleed_track
[07:05] <daveake> flying today nosebleed_track ?
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[07:19] <jcoxon> daveake, got your publicity...
[07:19] <daveake> yeah, so I noticed :p
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[07:20] <daveake> I've had some really nice comments from the RPi side, along the lines of "I was going to hook my Pi up to the TV to play videos, but now I'm going to do something interestnig with it instead"
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[07:21] <jcoxon> any bad comments?
[07:21] <daveake> One. About my t-shirt. lol
[07:23] <LazyLeopard> ;)
[07:24] <daveake> Oh and there's the occassional one where "stupid" shines through
[07:24] <daveake> Like "was it tethered?"
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[07:27] <UpuWork> I got asked why the balloon bursts on YouTube
[07:29] <daveake> No, no ...
[07:29] <daveake> .... it *explodes*
[07:29] <UpuWork> yeah
[07:29] <daveake> didn't you read?
[07:29] <daveake> That side is annoying and inevitable in equal measure
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[08:09] <WillDuckworth> anyone see that kickstarter chap who got more than $3000 for habing?
[08:19] <daveake> nope
[08:19] <daveake> something special to need that amount?
[08:20] <eroomde> you name in space!!!(tm)
[08:20] <daveake> "space"? :/
[08:21] <eroomde> MFSMF
[08:21] <daveake> tm = twat-mark?
[08:22] <eroomde> mother-fornicating space mother-fornicater
[08:22] <daveake> yes I guessed
[08:22] <daveake> My brain is too highly tuned to your way of thinking :p
[08:22] <eroomde> :)
[08:22] <eroomde> MFSMF has been the buzz word with iain and I the last couple of years
[08:22] <daveake> ah
[08:23] <eroomde> the whole end-game of all this dicking about the last 4 or 5 years is space afterall
[08:24] <eroomde> or rather, mfsmf
[08:24] <eroomde> i might make that the title of my ukhas talk
[08:24] <eroomde> "Towards MFSMF"
[08:25] <WillDuckworth> do it
[08:25] <eroomde> to which end, james posted this on our flickr page yesterday
[08:25] <eroomde> http://www.flickr.com/photos/69676024@N07/7598437034
[08:26] <daveake> "MFSMF - The Final Frontier"
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[08:32] <WillDuckworth> ah - yes saw that on the twitfart
[08:32] <eroomde> oh nice - via who just out of interest?
[08:33] <WillDuckworth> think it was macfarlane
[08:33] <WillDuckworth> yep - rocketengines
[08:34] <eroomde> cool
[08:34] <WillDuckworth> was going to ask you why the sabre needs the air cooled so much (from so high to so low)?
[08:35] <eroomde> because it has to compress it to a fairly high pressure to get enough moles of oxygen into the combustion chamber to react with the hydrogen
[08:35] <eroomde> it's harder to compress if it's more energetic
[08:35] <WillDuckworth> ok - i see
[08:36] <WillDuckworth> any joy with that yet?
[08:38] <eroomde> the happy side effect of more precooling is that you heat up the helium (the fluid used in the precooler tubes) even more, which means you can get more power to drive the turbine which drives the intake compressor
[08:38] <eroomde> http://vimeo.com/45382870
[08:38] <eroomde> and yes, there's some serious joy!
[08:38] <eroomde> the precooler testing is going well
[08:38] <eroomde> it's been run for several minutes below freezing
[08:39] <eroomde> demonstrating the frost control system
[08:40] <eroomde> the sabre cycle is quite complicated comapred to a normal rocket engine but you get the gist of it from that video
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[09:07] <nosebleed_track> ok guys
[09:07] <nosebleed_track> its 4km up
[09:08] <nosebleed_track> my stomach.........
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[09:10] <jcoxon> nosebleed_track, whats your callsign?
[09:10] <costyn> nosebleed_track: exciting :)
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[09:21] <fsphil> you've launched nosebleed_track??
[09:21] <jcoxon> i don't think its on aprs.fi
[09:28] <nosebleed_track> its SV7MKT-11
[09:28] <nosebleed_track> 10km
[09:28] <jcoxon> oh cool
[09:29] <jcoxon> not updating to aprs.fi :-(
[09:29] <nosebleed_track> ee
[09:29] <nosebleed_track> its strange
[09:29] <nosebleed_track> i get telemetry
[09:30] <nosebleed_track> and the habbub prediction is far different
[09:30] <fsphil> how different?
[09:30] <nosebleed_track> +25C inside -20C outside
[09:31] <fsphil> it will vary a bit, if the ascent rate is different for example
[09:31] <nosebleed_track> 11km
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[09:32] <UpuWork> where can we follow it ?
[09:34] <nosebleed_track> call nasa lol
[09:34] <nosebleed_track> i follow from my homemade receiver
[09:35] <fsphil> I thought you where using aprs?
[09:38] <kokey> scramble some jets
[09:41] <costyn> nosebleed_track: you're using 300mW right at 140 Mhz? maybe some of us here in western europe can hear it? I have no idea if 140mhz needs to be line of sight?
[09:42] <craag> It definetely works better line of sight.
[09:42] <craag> With some lucky propagation it's definetely possible we could rx from the UK though.
[09:43] <craag> (With a very decent setup)
[09:44] <nosebleed_track> almost 15km
[09:44] <nosebleed_track> 144.8mhz at 300mw
[09:44] <nosebleed_track> now it goes throught predictor
[09:44] <craag> MUF for sporadic E is 56MHz currently :(
[09:44] <costyn> craag: i have no idea what you just said :)
[09:45] <nosebleed_track> omg
[09:45] <nosebleed_track> i got parsing errors
[09:45] <nosebleed_track> not showing altitude ok
[09:45] <nosebleed_track> ok
[09:45] <nosebleed_track> fixed
[09:45] <nosebleed_track> :P
[09:45] <kokey> heh, phew
[09:46] <nosebleed_track> -30C
[09:46] <nosebleed_track> +19inside
[09:46] <craag> costyn: Sporadic E is when a cloud in the 'E' layer of the ionosphere is reflective, so you can bounce normally Line-Of-Sight signals off it and past the horizon.
[09:47] <nosebleed_track> 15676meters
[09:47] <craag> MUF = Maximum Usable Frequency, ie the Maximum Frequency that the clouds are currently reflecting.
[09:47] <costyn> craag: ok makes sense now :)
[09:47] <fsphil> if you're on 144.800 then other stations should be hearing you
[09:47] <fsphil> unless your packets are non standard
[09:48] <costyn> fsphil: aprs stations?
[09:48] <fsphil> yea, igates
[09:48] <fsphil> 144.800 is the standard frequency in europe
[09:49] <craag> At 11km up, every igate in 100 miles should be hearing you..
[09:49] <nosebleed_track> 16200m
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[09:52] <kokey> got it on http://aprs.fi/#!mt=roadmap&z=11&call=a%2FSV7MKT-11&timerange=3600 but out of date
[09:52] <craag> nosebleed_track: Have you still got it on 144.800?
[09:54] <craag> Also, is you are using UI-View or APRSISCE to track it, you can set that to send the packets to aprs.fi
[09:54] <craag> *if you are using
[09:56] <nosebleed_track> 18125m
[09:57] <nosebleed_track> http://imagebin.org/221374
[09:58] <craag> Ok.
[09:58] Action: craag runs to meeting
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[10:20] <nosebleed_track> 25163m
[10:23] <UpuWork> what is the rate of asent ?
[10:23] <nosebleed_track> its like 500m at 1min
[10:25] <UpuWork> thats fast
[10:34] <fsphil> are you in position for recovery?
[10:35] <nosebleed_track> 30km
[10:35] <nosebleed_track> lol
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[10:44] <x-f> where did he go now?
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[10:45] <x-f> the predictor is out of order?
[10:45] <x-f> There was an error in running the prediction: Unhandled exception: ServerError: 'Server error 0: "/gfs/gfs20120719/gfs_06z is not an available dataset"
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[10:46] <x-f> or it's just temporary till 12z update?
[10:46] <fsphil> hmm.. that doesn't sound good
[10:47] <navrac_work> I think its just temp. Did it to me the other day
[10:48] <upix> good day everyone
[10:48] <x-f> hi
[10:49] <upix> http://s17.postimage.org/qfxe5q7v3/wth.png any ideas why is this happening?
[10:49] <upix> and how to fix it
[10:50] <upix> I'm using rfm22
[10:54] <navrac_work> the gaps in transmission or the fact that the transmission is splattering all over the band?
[10:54] <upix> way too splattered
[10:55] <navrac_work> i suspect thats just the receiver
[10:55] <upix> well other signals are fine
[10:56] <navrac_work> if you take the antenna off the sdr does it improve - it might be just too much signal and overloading the rx
[10:56] <upix> will test in a se
[10:57] <upix> seems to fix that
[10:58] <upix> another thing which bothers me is that I setup rfm freq to be 434.12
[10:58] <upix> and the signal is not on the 434.12
[10:58] <upix> but rather unsymmetrically on both sides
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[11:01] <navrac_work> could be just an image
[11:03] <fsphil> yea with the funcube dongle, I get the signal on both sides of the centre frequency
[11:03] <fsphil> the image is a bit weaker but perfectly decodable
[11:04] <navrac_work> I get that on my funcube too with very strong signals - the cheapo sdr I bought is terrible for it.
[11:06] <nick_> Is it possible to run the decoder backend only?
[11:06] <eroomde> i'm confused
[11:06] <nick_> By me?
[11:06] <eroomde> surely if you're looking at the spectrum of an fm signal you fully expect images either side of the carrier?
[11:06] <upix> fsphil: how do you decode image? with 50bps it's several pixels wide
[11:06] <eroomde> no by upix
[11:07] <upix> eroomde: but you would expect them symetrically
[11:07] <upix> with the same offset
[11:07] <upix> or at least i would
[11:07] <Randomskk> or you have the wrong centre
[11:08] <Randomskk> but is this an FM signal or just a nearly static carrier jumping around at 50 baud?
[11:08] <navrac_work> is the rfm just transmitting a carrier or are you modulating it?
[11:08] <fsphil> the image in my case has the same shift as the original signal
[11:08] <fsphil> it's just reversed
[11:08] <upix> most it's just static, then i turn on signal, modulate, turn off
[11:08] <Randomskk> wombat used to transmit a whole ton of images
[11:08] <Randomskk> it was great
[11:09] <Randomskk> you could pick the rtty up at about 10 different frequencies in the 434 band
[11:09] <eroomde> you can get assymetric spectra with fm
[11:09] <Randomskk> makes avoiding qrm way easier
[11:09] <fsphil> you can decode the ntx2 up to 1.6ghz ish
[11:10] <fsphil> probably higher but I've no receiver that can cover it
[11:10] <eroomde> if the initial phases of the carrier and modulating source are different, the spectra will be assymetric. i think that is the case if you think about it trigonometrically
[11:11] <eroomde> because -sin(x) = sin(-x) but cos(-x) = cos(x)
[11:11] <eroomde> so sometimes you get energy cancelling on one side and adding to the other
[11:11] <eroomde> and sometimes the opposite
[11:11] <eroomde> etc
[11:16] <upix> eroomde: doesn't that explain the amplitude difference, but not the frequency offset?
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[11:28] <fsphil> hey nosebleed_track, how goes it?
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[12:18] <nosebleedkt_> going to land point
[12:18] <nosebleedkt_> :P
[12:29] <fsphil> we need news :)
[12:29] <fsphil> do you know where it is?
[12:30] <upix> is there a way to set offset in fldigi more than 1000
[12:30] <upix> offset between mark and space
[12:30] <fsphil> nope
[12:30] <fsphil> why would you want to?
[12:31] <upix> because at the moment my offset is bigger
[12:31] <upix> 1.2kHz
[12:31] <upix> or so
[12:33] <eroomde> what are you using to generate it?
[12:34] <upix> what exactly do you mean?
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[12:34] <eroomde> sorry was being vague
[12:34] <eroomde> what is generating the signal you're trying to decode?
[12:34] <upix> rfm22
[12:34] <eroomde> ah righty
[12:35] <upix> it has 625Hz deviation
[12:35] <upix> well N*625
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[12:36] <upix> and I set up N to be 1 and previously it gave me 625 offset
[12:36] <upix> now for some reason it doesn't set up to be N=1
[12:39] <Darkside> hrm
[12:39] <Darkside> i got 425Hz offset
[12:40] <Darkside> upix: you want to be setting some other register
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[12:40] <upix> I'm settin 0x72
[12:41] <Darkside> i use 0x073
[12:41] <Darkside> http://slexy.org/view/s21BKyXySn
[12:41] <upix> Darkside: you probably change carrier frequency itself
[12:42] <Darkside> yeah
[12:42] <upix> I've set up rfm22 to work in direct modulation mode
[12:42] <kokey> Darkside: turns out I had to upgrade OSX to upgrade Xcode to make macports work again
[12:42] <Darkside> thatsnow navrac_work did it
[12:42] <upix> i just give signal on GPIO
[12:42] <Darkside> how*
[12:42] <upix> and it modulates
[12:42] <Darkside> upix: yeah, that limits the shifts you can do
[12:42] <Darkside> and i wanted to keep my shift at 425Hz
[12:43] <Darkside> the method i'm using works fine at 300 baud
[12:43] <Darkside> probably will work higher
[12:43] <upix> ah that beeping is giving me headache :D
[12:46] <upix> Darkside: is the frequency "quanta" 156,25Hz in rfm?
[12:47] <Darkside> not 100%
[12:47] <Darkside> not sure
[12:49] <navrac_work> yes
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[13:04] <costyn> kokey: I got rid of macports and use homebrew now. Its less klunky and messy than macports
[13:07] <griffonbot> @AnthonyStirk: Dave on BBC http://t.co/lvw0y3pw #ukhas [http://twitter.com/AnthonyStirk/status/225940029233569792]
[13:09] <daveake> Julie joked earlier: "Much more of this and I'll need a Press Pass just to speak to you"
[13:09] <Darkside> BBC?
[13:09] <daveake> web
[13:09] <daveake> http://www.bbc.co.uk/news/technology-18900862
[13:09] <Darkside> nice
[13:09] <Darkside> Mr Akerman decided to use a Raspberry Pi to control the payload on his near-space craft because its USB port made it easy to connect up a cheap webcam.
[13:09] <Darkside> could take live images of its ascent, select the best shot, and then feed it back to ground control.
[13:09] <Darkside> select the best shot
[13:09] <Darkside> lol
[13:09] <daveake> lol
[13:10] <Darkside> Also onboard was an altimeter and a radio beacon
[13:10] <Darkside> i guess that correct
[13:10] <daveake> yeah
[13:10] <daveake> I should have asked him to send it to me to proof read
[13:10] <Darkside> highest ever photographs transmitted from an amateur device anywhere in the world.
[13:10] <Darkside> do amateur cubesats count?
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[13:13] <fsphil> good question
[13:15] <eroomde> what was the best shot algorithm - jpeg file size?
[13:15] <daveake> yep
[13:15] <daveake> took weeks of intensive coding
[13:15] <fsphil> "anywhere in the world"
[13:15] <fsphil> that rules out sats :)
[13:15] <daveake> lol
[13:15] <daveake> cheers, saved by fsphil :D
[13:15] <eroomde> i guess that would probably favour huge amounts o fluffy cloud
[13:15] <griffonbot> @adamcudworth: RT @AnthonyStirk: Dave on BBC http://t.co/lvw0y3pw #ukhas [http://twitter.com/adamcudworth/status/225942032093413378]
[13:15] <eroomde> rather than curvature of the earth
[13:16] <daveake> Indeed, but I didn't get time for anything smarter
[13:16] <fsphil> it pretty much did yea
[13:16] <fsphil> although some of the pics where pretty good
[13:16] <daveake> It did OK but yes that was the bias
[13:16] <eroomde> as fluffy clouds have more info
[13:16] <daveake> yup
[13:17] <eroomde> train a neaural network next time
[13:17] <daveake> nick_ had an idea about using a learning program
[13:17] <eroomde> go all 1980s on its ass
[13:17] <daveake> :D
[13:17] <nick_> daveake: learning is hard, but if you want to do it cool
[13:17] <eroomde> learning is hard
[13:18] <fsphil> could do simple image correlation?
[13:18] <nick_> What is easier is deciding the selection for good photos yourself.
[13:18] <daveake> Tim did something with amount of blue or similar
[13:18] <fsphil> I was surprised how little warping there was, from the rolling shutter
[13:19] <daveake> That webcam, which was £12-something in PCWorld (so cheap I bought a spare) did very well
[13:19] <nick_> opencv has a bunch of algoritms you can use
[13:19] <eroomde> yeah, we have had some seri-ass webcam issues in the past
[13:19] <eroomde> had one that really didn;t like the cold or low temps
[13:19] <fsphil> I'll have to see if I can get one
[13:19] <nick_> But it's much simpler for a person to pick which ones might work than for a computer
[13:19] <eroomde> lemme find a pic hang on
[13:20] <fsphil> I seen a pic of a folding earth - a bit inceptiony
[13:20] <fsphil> because the payload was spinning at the time
[13:20] <daveake> I have a C920 which is £65 I think, and produced better pictures, but I felt more comfortable risking the cheaper one
[13:20] <nick_> And I assume it's also easy to use to implement your own ideas, like "there's a mainly black area in one corner" or something
[13:20] <daveake> Yeah
[13:21] <daveake> I like the black-in-the-corner ones
[13:21] <fsphil> cheap works for me, I'm only going to transmit silly small images
[13:21] <daveake> Quite so
[13:21] <daveake> Less weight too
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[13:22] <nick_> Naively it should be simple to do something like define the area of "space" by averaging pixels and looking for antying darker than x
[13:22] <daveake> Me menitioned on TWIT TV lol - http://twit.tv/show/triangulation/61
[13:22] <daveake> Oh, video still not ready; was told it was up now
[13:22] <fsphil> yea not loading
[13:23] <nick_> And then give a suitable weighting to wheter it's all spaec, or one half, or a corner, or whatever
[13:23] <daveake> Ah see bottom-left
[13:23] <daveake> You can get the audio
[13:23] <daveake> justamo I'll get the time you need to listen from
[13:24] <craag> Just noticed the JPEG2000 bullet point disappeared from the dsstv article
[13:25] <craag> does that mean it's been implemented?
[13:25] <fsphil> nope, I'm not considering it just yet :)
[13:26] <eroomde> i cannot find the pic i wanted of the suffering webcam
[13:26] <eroomde> but i did find something
[13:26] <craag> Ah ok, I was going to mention that imagemagick supports transcoding to/from it.
[13:26] <eroomde> UpuWork: found a pic of the zero pressure balloons made by the zp machine that we built
[13:26] <fsphil> I don't think it offers enough benefit in terms of compression
[13:26] <eroomde> we sacrificed niceness of shape for speed of manufacture
[13:26] <griffonbot> @willduckworth: #ukhas RT @Raspberry_Pi: The space-going RPi from @daveake has made the BBC's website - http://t.co/VgBKX6tK [http://twitter.com/willduckworth/status/225944723821572096]
[13:26] <fsphil> it's not actually that much better than jpeg
[13:26] <craag> ok, I was trying to find a comparison and my google-fu failed.
[13:27] <eroomde> UpuWork: http://www.cusf.co.uk/images/PICT0018.JPG
[13:27] <eroomde> the one on the left is the optimum shape
[13:27] <fsphil> I'd love a second optinion
[13:27] <WillDuckworth> ooo- i like those
[13:27] <eroomde> but the ones on the right were al the result of one afternoon of messing about
[13:27] <fsphil> opinion even
[13:27] <nick_> daveake: do you know how much space would have been used if you'd saved all the images you took?
[13:27] <WillDuckworth> how did they do eroomde?
[13:27] <daveake> If you want to listen to "my" bit, srat at the 40-minute mark where Eben gets asked what people use the Pi for
[13:27] <daveake> nick_ "not much"
[13:27] <kokey> nice one, bbc news
[13:28] <eroomde> WillDuckworth: never flew them
[13:28] <daveake> yeah I spoke to the BBC guy so he didn't just do it from my blog like everyone else did
[13:28] <nick_> It would be quite nice to basically give each image a score and transmit the best so far that hadn't already been transmitted.
[13:28] <nick_> And then check the results afterwards to see if they really were the best.
[13:28] <daveake> Yes
[13:29] <eroomde> i think if you want a nice mix of sky and not sky, you want to use what jpeg already gives you for free
[13:29] <eroomde> so, i'm making some assumptions here about your specific implementation
[13:29] <eroomde> but do you use 8x8 discrete cosine transform subimages?
[13:30] <fsphil> 8x8 for the luminance (default mode anyway)
[13:30] <daveake> *all* I do is use fswebcam (wonder who wrote that?) to take the photo and produce a jpeg
[13:31] <eroomde> assuming yes, and given before you rearrnage them in order of frequency, maybe see if you have a nice distribution of about hald high entropy and half low entropy subimages
[13:31] <eroomde> half*
[13:35] <eroomde> or do something more encoding agnostic as nick suggests
[13:35] <eroomde> but that's usually quite computational to do well
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[13:36] <eroomde> at least it is if you think bayes rule is the only way to approach these problems
[13:36] <eroomde> which of course you should because it is
[13:36] <eroomde> love bayes hate racism
[13:37] Action: craag wonders whether you could do some very-low resolution (eg. 10x15) buffered video, with several seconds-worth sent down with each packet to keep a continuous stream going.
[13:38] <fsphil> I tried that with a few codecs but couldn't keep the bitrate low enough
[13:38] <craag> Ah ok.
[13:38] <fsphil> the lowest I got was about 1200 bit/s
[13:38] <fsphil> which is possible
[13:38] <eroomde> amen
[13:39] <craag> But then you'd like some FEC as well really..
[13:39] <fsphil> yea that didn't include fec
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[13:39] <eroomde> ah fec using error correction. just transmit and hope
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[13:39] <craag> Hmm, with a good number of keyframes you could get away without it.
[13:40] <fsphil> yea, faster frame rate video will have less impact from bad data
[13:41] <eroomde> it was a joke
[13:41] <eroomde> my old bad one
[13:41] <eroomde> one of *
[13:41] <fsphil> you can do 0.4 fps with 1200 baud and ssdv
[13:42] <fsphil> with an image of about 16x16
[13:42] <gonzo_> how about a 30line fast scan?
[13:42] <fsphil> that's what I'm going to use the pi for
[13:42] <fsphil> back to analogue :)
[13:43] <gonzo_> then you can dig out your old baird televisor
[13:43] <daveake> Need bigger chase car
[13:43] <gonzo_> it's only hellschriber without the paper
[13:43] <gonzo_> the NBTV club have SW and stuff for that mode
[13:43] <fsphil> not far from it actually
[13:44] <gonzo_> (Actually their std is for 32 lines)
[13:44] <fsphil> I'll be doing 4:3 rather than their vertical format
[13:44] <gonzo_> saw a demo of a mechnaical tv, suprisingly good
[13:44] <daveake> Ah, Google Translation ... "Conclusion: This is the first man to send a raspberry ft in virtual space ... It smells like it defies "
[13:44] <fsphil> although it's tempting to stick to the standard, see if anyone else can receive it
[13:45] <fsphil> lol
[13:45] <gonzo_> I bet there would be some interest from the TV people
[13:45] <daveake> I like the Pi doing a re-entry .. http://tuxme.net/wp-content/uploads/2012/07/RS_FLY.png
[13:46] <fsphil> armapiddon
[13:46] <daveake> :)
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[13:47] <Lunar_LanderU> hello
[13:47] <Lunar_LanderU> daveake: I just measured the voltage from the Sensor without resistor and then with different resistances as pulldowns
[13:48] <daveake> ok
[13:48] <eroomde> i like ordering expensive connectors
[13:48] <Lunar_LanderU> I saw 1.8 V without resistor
[13:48] <Lunar_LanderU> with 1 k for example I got 0.008 V
[13:48] <Lunar_LanderU> 2k gave 0.016V and 3k 0.024V
[13:48] <eroomde> i just had cause to by a big 26-way mil circular connector
[13:49] <daveake> eroomde I bet you watch videos of reassuringly expensive connectors mating
[13:49] <eroomde> except they do a sexy range where they do black plated connector with gold contacts
[13:49] <eroomde> instead of olive drab
[13:49] <gonzo_> connector porn!
[13:49] <eroomde> and yes i have looked at videos on youtube of connectors mating
[13:49] <Lunar_LanderU> daveake: now I have to calculate the impedance, right?
[13:49] <daveake> :D
[13:49] <Lunar_LanderU> XD
[13:49] <daveake> yes
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[13:50] <daveake> clue: it's very high
[13:50] <Lunar_LanderU> OK
[13:50] <Lunar_LanderU> do I first need to figure out the current from my resistance and voltage values?
[13:51] <daveake> It's a potential divider
[13:51] <daveake> clue is in the last word
[13:51] <Lunar_LanderU> yea
[13:52] <daveake> the 2 resistors *divide* the voltae
[13:52] <Lunar_LanderU> the sensor is like the top resistor in the divider
[13:52] <daveake> Exactly
[13:52] <Lunar_LanderU> OK
[13:52] <Lunar_LanderU> one moment
[13:52] <daveake> So do the maths I think you did before
[13:52] <daveake> I'd do it for you but I'm to famous for that now
[13:53] <daveake> too
[13:55] <Lunar_LanderU> yea
[13:56] <Lunar_LanderU> I just got it
[13:56] <Lunar_LanderU> 410kOhms
[13:57] <daveake> close
[13:57] <daveake> 225k
[13:57] <Lunar_LanderU> the calculator on that page you gave me said that
[13:57] <Lunar_LanderU> this one http://www.electronics2000.co.uk/calc/potential-divider-calculator.php
[13:58] <daveake> 1.8V in, 80mV out
[13:58] <daveake> er 8mV
[13:58] <Lunar_LanderU> ah
[13:58] <Lunar_LanderU> but the sensor is fed with 3.3V
[13:58] <daveake> SO the result should be (1.8 / 0.08) * 1k
[13:58] <daveake> (roughly)
[13:58] <daveake> no no no no no
[13:59] <daveake> open circuit you said it measured 1.8V output
[13:59] <Lunar_LanderU> yes
[13:59] <daveake> that's what you get without a resistor load
[13:59] <Lunar_LanderU> yeah
[13:59] <Lunar_LanderU> got it now
[13:59] <daveake> so that's what you use in the calc
[13:59] <Lunar_LanderU> sorry
[13:59] <Lunar_LanderU> yea
[13:59] <daveake> YIPPEEEE XD
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[13:59] <Lunar_LanderU> XD
[13:59] <Lunar_LanderU> I used the other calculator on the page now
[13:59] <daveake> I used the one on my desk
[13:59] <Lunar_LanderU> gave it 220k and V1=1.8V
[14:00] <Lunar_LanderU> 500k would give 1.25 V
[14:00] <nick_> daveake: also known as your computer?
[14:00] <daveake> If you use a 220k load resistor you should get 0.9V
[14:00] <daveake> Nope :D
[14:00] <daveake> A real one
[14:00] <Lunar_LanderU> xD
[14:00] <Lunar_LanderU> yeah 220k gives 900 mV
[14:01] <Lunar_LanderU> that means I need something like a megaohm or so?
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[14:01] <daveake> No, 220k is OK, so long as 90.9V into your A/D gives you enough precision
[14:01] <daveake> Remember that the A/D will have its own impedance which, unless very high, you should take into account
[14:01] <daveake> 0.9V
[14:02] <daveake> High impedance means easy to pick up noise, so you might want a capacitor across it too. See what the datasheet for the sensor says (if anything)
[14:04] <Lunar_LanderU> OK
[14:04] <Lunar_LanderU> datasheet doesn't mention capacitors
[14:04] <daveake> OK, well see how it goes
[14:05] <nick_> What sensor is this?
[14:05] <daveake> make sure it's OK if you have a radio transmitter or GSM next to it
[14:05] <Lunar_LanderU> HIH-4030 from Honeywell
[14:05] <Lunar_LanderU> yeah
[14:05] <Lunar_LanderU> that I tried last year already when I drove the NTX2 and the sensors from an arduino uno
[14:06] <daveake> If you get noise on the readings you can smooth them in hardware (capacitor) or software (take average of last few readings)
[14:06] <Lunar_LanderU> yea
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[14:08] <daveake> ANyone know if nosebleed is flying today? ISTR he mentioning it
[14:09] <fsphil> he's already flew
[14:09] <fsphil> last I saw he was heading to the landing site
[14:10] <daveake> ah, so no online tracking then?
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[14:10] <fsphil> didn't seem to be, although he didn't say why
[14:10] <fsphil> from what I can tell he was using standard aprs so it should have appears on aprs.fi
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[14:10] <fsphil> appeared*
[14:11] Action: fsphil gives up correcting errors
[14:11] <daveake> ah
[14:11] <daveake> yes, forgot is was aprs
[14:11] <daveake> (ditto)
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[14:37] <Lunar_LanderU> nosebleed flew?
[14:37] <Lunar_LanderU> COOL!
[14:37] <daveake> He held on the balloon?
[14:38] <fsphil> thankfully he has some tissues, it's difficult to get blood out of cloths
[14:38] <fsphil> no word on recovery so far
[14:38] <Lunar_LanderU> blood?
[14:39] <fsphil> nose bleed...
[14:39] <Lunar_LanderU> XD
[14:39] <fsphil> I predicted that response :p
[14:39] <Lunar_LanderU> :)
[14:39] <Lunar_LanderU> OK
[14:39] <Lunar_LanderU> be back later!
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[14:40] <daveake> You'll be back?
[14:40] <daveake> too late
[14:41] <fsphil> good quit message
[14:43] <daveake> lol
[14:46] <kokey> daveake: you use softserial to let an arduino talk to the ublox?
[14:46] <daveake> not bloody likely
[14:46] <daveake> er, no :)
[14:47] <kokey> why not?
[14:47] <kokey> seemed to work ok for me last night
[14:47] <daveake> Because a real UART is less hassle
[14:48] <daveake> I use it for the GSM backup
[14:49] <WillDuckworth> is it worth putting heatsinks on the pi for habing?
[14:49] <kokey> I'll look into it some more, perhaps get a uart when I order some sensors
[14:49] <daveake> WillDuckworth probably
[14:49] <kokey> WillDuckworth: either that, or some cake mix
[14:49] <daveake> They're cheap (though the glue isn't)
[14:49] <eroomde> if one is being pedantic, software serial would be fine for letting the arduino *talk to* the ublox
[14:49] <eroomde> but the ublox talking to the arduino would be far more hassle
[14:49] <daveake> indeed :)
[14:50] <daveake> But it's not like you to be pedantic ;)
[14:50] <WillDuckworth> :D
[14:50] <daveake> I got the SMPS modules yesterday and I'll run a Pi from those soon to see how that goes
[14:51] <eroomde> pedantry saves lives
[14:51] <daveake> :D
[14:51] <eroomde> in more ways that t-shirt slogans
[14:51] <eroomde> ("let's eat grandma", "let's eat, grandma")
[14:52] <M0JSN> http://www.thebookoffreak.com/wp-content/uploads/2010/12/lets-eat-grandma.jpg
[14:52] <M0JSN> indeed
[14:54] <UpuWork> ping MrScienceMan
[14:54] <kokey> I think I'll just poll the ublox6
[14:54] <kokey> anyway, I'll get to that later once I got the radio bits sorted
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[15:16] <griffonbot> @daveake: Eben Upton interviewed on twit.tv about the #Raspberry_Pi. From the 40-minute mark he talks about the weather balloon flight #HAB #UKHAS [http://twitter.com/daveake/status/225972488373432320]
[15:18] <griffonbot> @daveake: Now for the link :-) http://t.co/oUcmIKQe #Raspberry_Pi #HAB #UKHAS [http://twitter.com/daveake/status/225972842917945345]
[15:19] <fsphil> nice recovery
[15:20] <daveake> :)
[15:20] <daveake> Annoying when you can edit a mistake
[15:21] <daveake> ^^ can't lol
[15:27] nosebleed_track (~nosebleed@ppp046177132236.access.hol.gr) joined #highaltitude.
[15:27] <daveake> got it?
[15:27] <fsphil> please say yes
[15:28] <UpuWork> where did it get too ?
[15:32] <eroomde> so it looks like we got pretty close to doing a columbia with that last burn
[15:32] <eroomde> http://i.imgur.com/TmHl0.jpg
[15:32] <eroomde> that used to be an o-ring
[15:32] <daveake> eek
[15:33] <nosebleed_track> well
[15:33] <nosebleed_track> no
[15:33] <nosebleed_track> :(
[15:33] <nosebleed_track> i got its point
[15:33] <nosebleed_track> the place is very difficult to access
[15:33] <nosebleed_track> i need to organisea search party
[15:34] <nosebleed_track> with hunters and stuff
[15:34] <nosebleed_track> from local community
[15:34] <nosebleed_track> 40.8413,23.408
[15:34] <fsphil> hunters? are there wild animals?
[15:34] <nosebleed_track> yes
[15:34] <fsphil> eek
[15:34] <nosebleed_track> pretty risky man
[15:34] <nosebleed_track> brb
[15:34] <fsphil> whoa
[15:34] <fsphil> that makes hadie:3's landing site look nice
[15:35] <craag> Oh wow that is remote..
[15:35] <nosebleed_track> man i went down there with my car
[15:35] <nosebleed_track> imagine
[15:35] <nosebleed_track> 40.8406,23.4091
[15:35] <daveake> So, it's in a tree?
[15:35] <nosebleed_track> thats the place where my car could go
[15:35] <nosebleed_track> i guess
[15:36] <nosebleed_track> brb guys
[15:36] <nosebleed_track> need to calm a bit
[15:36] <nosebleed_track> just came home
[15:36] <eroomde> yep go and grab a coffee and eat something, and definitely don't take too much of a risk recovering
[15:36] <daveake> whs
[15:37] <eroomde> also if you do have a difficult recovery go prepared
[15:37] <daveake> Don't fight any triffida
[15:37] <daveake> -a+s
[15:37] <eroomde> when noisebridge did some balloon flights they were all counter-culture steam punk about it and other things that don;t belong outside a city
[15:38] <eroomde> one of them got hypothermia on recovery and had to be rescued
[15:38] <daveake> ouch
[15:38] <daveake> I've added "warm clothes" to my chase car packing list :)
[15:38] <eroomde> when we were in scotland we never went out unless in pairs and with 48hrs of food and emergency shltering
[15:39] <fsphil> yea, a fresh pair of shoes too
[15:39] <eroomde> it's not worth taking the risk over a bit of hardware
[15:39] <nick_> eroomde: I assume this was in downtown Galsgow?
[15:39] <nosebleed_track> well
[15:39] <fsphil> lol
[15:39] <eroomde> nick_: no it wasn't worth recoveing if it landed there
[15:39] <eroomde> to dangerous
[15:39] <nosebleed_track> telemetry was ok
[15:39] <nick_> 2 stab vests each, one on your torso, one on your head?
[15:40] <fsphil> I feel like I should buy some stamps now
[15:40] <nosebleed_track> predictor was ok
[15:44] <kokey> just take some south africans with
[15:44] <kokey> if it's glasgow, make sure it's from johannesburg, if outside in the wilderness, make sure they are either afrikaans or from zimbabwe
[15:45] <Laurenceb> noisebridge?!
[15:45] <Laurenceb> who are they
[15:46] <nosebleed_track> http://imagebin.org/221398
[15:46] <nosebleed_track> thats me
[15:46] <nosebleed_track> before lift :)
[15:46] <fsphil> so that's where our summer is :)
[15:47] <kokey> south of the jet stream
[15:47] <fsphil> what height did it get to?
[15:47] <daveake> Lack of trees ... you should have landed there not launched :D
[15:47] <Laurenceb> wild animals?!
[15:47] <Laurenceb> what sort
[15:49] <Laurenceb> http://www.kidcyber.com.au/topics/greeceabout.htm
[15:49] <Laurenceb> oh shit
[15:49] <Laurenceb> badgers
[15:50] <fsphil> lol
[15:50] <Laurenceb> http://regmedia.co.uk/2012/07/16/promotional_poster_big.jpg
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[15:58] <nosebleed_track> back
[15:59] Nick change: nosebleed_track -> nosebleedkt
[15:59] <nosebleedkt> time to collect telemetry from aprs.fi
[16:00] <nosebleedkt> you can see my results here
[16:00] <nosebleedkt> http://aprs.fi/?c=raw&call=SV7MKT-11&limit=100&view=normal
[16:00] <nosebleedkt> 40.8371,22.9353,38834
[16:00] <nosebleedkt> max alt 38
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[16:01] <nosebleedkt> 38834meters
[16:02] <nosebleedkt> i hope the camera was working
[16:02] <nosebleedkt> lol
[16:03] <fsphil> whoa
[16:03] <fsphil> not bad
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[16:06] <daveake> pretty good, esp for helium
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[16:07] <eroomde> v good!
[16:07] <nosebleedkt> damn stupid internet
[16:07] <nosebleedkt> well
[16:07] <nosebleedkt> in case you didnt read
[16:07] <nosebleedkt> [19:00] <nosebleedkt> you can see my results here
[16:07] <nosebleedkt> [19:00] <nosebleedkt> http://aprs.fi/?c=raw&call=SV7MKT-11&limit=100&view=normal
[16:07] <nosebleedkt> [19:00] <nosebleedkt> 40.8371,22.9353,38834
[16:07] <nosebleedkt> [19:00] <nosebleedkt> max alt 38
[16:07] <nosebleedkt> [19:01] * Joins: daveake (~Dave@daveake.plus.com)
[16:07] <nosebleedkt> [19:01] <nosebleedkt> 38834meters
[16:07] <nosebleedkt> [19:02] <nosebleedkt> i hope the camera was working
[16:07] <nosebleedkt> [19:02] <nosebleedkt> lol
[16:07] <nosebleedkt> [19:06] <nosebleedkt> my software was parsing some things bad
[16:07] <nosebleedkt> sorry for the spam
[16:07] <nosebleedkt> :P
[16:07] <nosebleedkt> its myday today :)
[16:09] <fsphil> long time coming :)
[16:09] <fsphil> great altitude
[16:10] <craag> I like how you changed the APRS path based on the Altitude to avoid clogging the digipeaters.
[16:10] <nosebleedkt> telemetry was also collected from bulgaria and romania
[16:11] <nosebleedkt> you got it man
[16:12] <nosebleedkt> ;)
[16:13] <nosebleedkt> little peace of code
[16:13] <nosebleedkt> http://pastebin.com/nCpt23WQ
[16:13] <craag> Pretty please send APRS-spec position packets next time so we can all watch a little balloon picture drift across our screens.
[16:13] <fsphil> +1 :)
[16:14] <nigelvh> When I did APRS on my balloons I did standard position, then custom telemetry packets.
[16:14] <nigelvh> Twice as many packets, but easier on everyone.
[16:14] <craag> Ah, CODE BUG!
[16:14] <nosebleedkt> i was sending only status messages and not position
[16:14] <craag> It overflows at 32,768 m
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[16:15] <nigelvh> Whooo signed integer altitudes! Journey to the center of the earth!
[16:15] <fsphil> lol
[16:15] <craag> His reported altitude was correct, but the path-selection code is affected.
[16:15] <nigelvh> Also, the calculated vertical velocity must be enormous.
[16:16] <nosebleedkt> external temp and vertical velocity was parsed in bad way
[16:16] <nosebleedkt> but i can surely tell you that it was going fast
[16:16] <nosebleedkt> like 500m in 1min
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[16:20] <nosebleedkt> man i need to export those results
[16:20] <nosebleedkt> will get interested results
[16:23] <craag> nosebleedkt: Do you see what I mean with the bug in the APRS Path selection? The atoi() function is converting it to a 16-bit integer, which overflows at 32,768m.
[16:24] <craag> Yeah, would be good to see a map overlay.
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[16:26] <nosebleedkt> APZIKA,WIDE2-1,qAR,YO7LMU-10:>40.8371,22.9353,38834,264,119,-004,10,1101|31,+21,+28,46,0 3|0684,FF,BABALU
[16:26] <nosebleedkt> well highest alt was 38834
[16:26] <nosebleedkt> lol
[16:29] <nosebleedkt> im curius why noone from north europe didnt got it
[16:29] <nosebleedkt> those 300mw supposed to be like thunder :)
[16:30] <craag> They might have, but aprs.fi just registers whoever uploaded it first.
[16:31] <nosebleedkt> damn!
[16:33] <eroomde> dull observaion of the day by ublox 6 modules really are good aren't they
[16:33] <eroomde> ttff is crazy. just reminded of it by working with an older module and a ublox 6 both today
[16:34] <mattbrejza> is there anything thats worse on a ublox 6 then on something else?
[16:34] <mattbrejza> they do seem very good indeed, and very good price
[16:34] <Laurenceb> if you have battery is often a few hundered milliseconds
[16:34] <daveake> Well they need talking to
[16:35] <daveake> And the power is a bit spikey
[16:35] <daveake> But they are very very good
[16:35] <mattbrejza> well you cant have features without effort
[16:35] <daveake> With a Sarantel antenna they only need a sniff of the sky to get a lock
[16:35] <mattbrejza> and for normal applications you dont need to talk to them
[16:35] <Laurenceb> power is less of an issue than with ublox5
[16:35] <daveake> true
[16:36] <mattbrejza> i cant say have had power issues, but no reason to with a decent reg
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[16:40] <kokey> weird my ublox6 didn't get a lock last night
[16:40] <kokey> but that was inside of the flat by the south facing window
[16:41] <kokey> but I suspect something is weird by me, my radio clock struggles to get signal, the rtl-sdr struggles
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[16:41] <kokey> the only thing that seems to work ok are the mobile phones, but not all the time
[16:42] <mattbrejza> if you connect it to ucentre itll show you signal strength
[16:42] <mattbrejza> and you can read the jamming indictator
[16:42] <mattbrejza> oc you can access that via the micro but effort
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[16:56] <nosebleedkt> my stupid windows software
[16:56] <nosebleedkt> was throwing exceptions all the time
[16:57] <nosebleedkt> when i the usb dongle could connect to 3G
[16:57] <nosebleedkt> could not *
[17:09] <nosebleedkt> lol
[17:09] <nosebleedkt> GSM backup still responds
[17:09] <nosebleedkt> i love it
[17:09] <nosebleedkt> i wanna save it
[17:10] <nosebleedkt> 40.8413,23.408,267
[17:10] <craag> How much battery life do you reckon it's got? Would be a lot easier to find if you could traingulate the 144.800 with a yagi I reckon.
[17:11] <craag> *triangulate
[17:11] <nosebleedkt> man until the night everything will be off
[17:11] <stilldavid> how far away are you, nosebleedkt ?
[17:12] <nosebleedkt> 1 hra
[17:12] <nosebleedkt> from home
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[17:14] <upix> seems like you will need an axe :)
[17:15] <Upu> are you still sat here chatting on IRC ? :)
[17:15] <nosebleedkt> ?
[17:15] <Upu> I'd be going out getting it
[17:16] <stilldavid> indeed! unless you're already mobile
[17:16] <nosebleedkt> no man
[17:16] <nosebleedkt> its badthere
[17:16] <nosebleedkt> you cant go just like that
[17:16] <Upu> so whats your plan ?
[17:16] <nosebleedkt> collect a hunter party
[17:16] <Upu> now thats a plan
[17:17] <Upu> you can shoot it down from a tree
[17:17] <Upu> good luck :)
[17:17] <stilldavid> I mean, I see roads :)
[17:17] <upix> nosebleedkt: why is it dangerous, it's like 125 meters from some dirtroad
[17:17] <daveake> Roads. Trees. Sounds like usual to me.
[17:17] <nosebleedkt> stilldavid: you dont want to cross those 'roads' with your car
[17:17] <stilldavid> have a dirtbike?
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[17:18] <nosebleedkt> whats that?
[17:18] <daveake> Get a big 4x4
[17:18] <stilldavid> also why I have a big car
[17:19] <nosebleedkt> yes i need a car
[17:19] <nosebleedkt> big 4x4
[17:21] <upix> 40.838473,23.408087 what's here?
[17:21] Action: daveake just bought one
[17:21] <nosebleedkt> lol
[17:21] <daveake> but it's not in Greece
[17:21] <nosebleedkt> dont bring it here or it's stolen :P
[17:21] <daveake> lol
[17:22] <daveake> Too old to get stolen :)
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[17:27] <upix> I have nokia 6230i and I'm still afraid it gets stolen
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[17:36] <fsphil> I've an old 486 laptop I'd love to get stolen
[17:37] <fsphil> I think they'd bring it back though
[17:37] <costyn> so... nosebleed's payload has landed in the Greek boonies and he needs an offroad vehicle to retrieve it?
[17:38] <craag> Looking at the nearby photos he needs a jungle expedition
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[17:40] <daveake> nosebleedkt Do you have the 4x4, guns and chainsaw yet?
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[17:43] <upix> daveake: that sounds like a tank :)
[17:44] <daveake> That'd work
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[17:50] <costyn> he made it sound as if you really need all those things. Perhaps there are mad homeless Greek ex-politicians roaming those woods
[17:53] <daveake> Should have dropped something else on them then
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[18:51] <nosebleedkt> ah i forgot to tell
[18:51] <nosebleedkt> my payload was 1.348kg
[18:51] <nosebleedkt> lol
[18:54] <MrScienceMan> d:)
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[19:20] <stilldavid> nosebleedkt: any news?
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[19:24] <Laurenceb__> he was eaten by viscous badgers
[19:26] <nigelvh> Perhaps a honey badger. They don't give a shit.
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[19:27] <jonsowman> honey is also viscous
[19:27] <daveake> Or a Drop Badger
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[19:28] <LazyLeopard> Honey badgers are serious muscle...
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[19:28] <nosebleedkt> stilldavid: what news :)
[19:29] <LazyLeopard> Brick wall? No problem. You did want it torn down, didn't you...
[19:29] <nosebleedkt> Tomorrow I will contact hunters of the nearby village. My father has some friends there.
[19:34] <nosebleedkt> lol
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[19:49] <nigelvh> Just avoid the honey badger. http://www.youtube.com/watch?v=4r7wHMg5Yjg
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[19:53] <daveake> Impressive Photoshop skills here - http://www.gizmodo.co.uk/2012/07/meet-the-first-raspberry-pi-in-space/ lol
[19:54] <jonsowman> i think you forgot the balloon and the rest of the payload there daveake
[19:54] <daveake> damn
[19:54] <daveake> It'd have been better if I did it :)
[19:54] <jonsowman> lol
[19:54] <daveake> And it wouldn't have said "in space" either
[19:55] <jonsowman> yes, i don't think that's ever going to go away
[19:55] <jonsowman> it's too good a headline
[19:55] <daveake> nope
[19:56] <daveake> "somewhere near space but not actually space at all" isn't quite so catchy
[19:56] <jonsowman> agreed
[19:56] <daveake> I told the BBC guy not to say it was space :)
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[19:57] <jonsowman> :)
[19:57] <Dan-K2VOL1> nice daveake :-)
[19:57] <Upu> evening Dan
[19:57] <Upu> how are you ? XD
[19:57] <Dan-K2VOL1> hi upu
[19:57] <daveake> The BBC one has accounted for more hits than everything else altogether
[19:58] <Dan-K2VOL1> doing very well, dreaming up schemes for making superpressure envelopes with robots :-P
[19:58] <Upu> Toying with making a payload based on an Iridium modem to cross the atlantic any tips other that don't do it ?
[19:58] <Dan-K2VOL1> just keep it very high :-)
[19:58] <Upu> that was the plan :)
[19:59] <Upu> I think the winds are changing soon anyway
[19:59] <Dan-K2VOL1> superpressure?
[19:59] <Upu> yeah
[19:59] <Upu> can't rely on latex
[19:59] <Dan-K2VOL1> nice
[19:59] <Upu> its at the same stage of planning as my moon rocket so don't watch this space
[19:59] <Dan-K2VOL1> the iridium 9603 is the way to go now
[19:59] <Upu> yeah I looked at that
[19:59] <Dan-K2VOL1> smaller and lighter than the 9602, and software compatible
[20:00] <Upu> there is alot to consider and its far from a solo project
[20:00] <Dan-K2VOL1> yeah
[20:00] <Dan-K2VOL1> I'd be interested in working together
[20:00] <Dan-K2VOL1> I've got very little free time these days, but that's the sort of thing I'd like to see happen
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[20:01] <Upu> we have alot of testing to do but I'm not ruling it out, I think the super pressure balloon is probably the sticking point but we'll see
[20:02] <Dan-K2VOL1> well, I suspect that if you get a solar powered iridium payload down below 100g, the balloon will arrive :-)
[20:02] <Upu> well solar with a battery on it
[20:02] <Dan-K2VOL1> yeah
[20:02] <Upu> I need to be able to terminate the flight, don't really want it floating somewhere daft
[20:03] <nigelvh> Daveake is internet famous.
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[20:03] <Upu> he is indeed
[20:03] <Dan-K2VOL1> oh? link?
[20:03] <daveake> link?
[20:03] <daveake> you mean links
[20:03] <Upu> but its me in the pic next to him :)
[20:03] <daveake> lol
[20:03] <Upu> http://www.raspberrypi.org/archives/1620
[20:03] <daveake> http://www.bbc.co.uk/news/technology-18900862 is a good one
[20:03] <daveake> those 2 best
[20:04] <Upu> I like the one where the balloon exploded at 40km
[20:04] <daveake> on its way to space
[20:05] <Dan-K2VOL1> how much was the power draw daveake
[20:05] <daveake> lots
[20:05] <Dan-K2VOL1> lol
[20:05] <nigelvh> A few megawatts
[20:05] <Upu> enough to melt the polysytrene
[20:05] <daveake> Upu: tell Dan how hot is was
[20:05] <Upu> it stunk of burning electronics when Dave opened it
[20:05] <daveake> 500mA +
[20:05] <Dan-K2VOL1> haha
[20:05] <Dan-K2VOL1> tikes
[20:05] <Dan-K2VOL1> yikes
[20:05] <Upu> Heat sinks outside next time
[20:06] <daveake> Nope
[20:06] <daveake> SMPS next time
[20:06] <Upu> yeah
[20:06] <daveake> Got them now
[20:06] <daveake> didn't arrive in time for last w/e
[20:06] <nigelvh> Or a heatpipe running outside.
[20:06] <daveake> I'll measure the efficiency this weekend
[20:07] <daveake> It was down for well over an hour before we opened it
[20:07] <daveake> So it had time to warm up in our "summer"
[20:08] <daveake> Someone on the internet said something wrong
[20:08] <daveake> Shocking I know
[20:08] <nigelvh> I wonder if the proc on the raspberry pi has a thermal shutdown like computer processors do.
[20:08] <daveake> It was "You'll need handwarmers to keep the Pi warm"
[20:09] <daveake> Dunno. The really hot part was the offboard regulator
[20:09] <daveake> The Pi was OK despite that being in the case
[20:09] <daveake> I think having switching regs it'll all be a lot cooler
[20:10] <Gadget-Mac> Hi guys.
[20:10] <Gadget-Mac> Time to stop lurking :)
[20:11] <Dan-K2VOL1> hi mac
[20:11] <Gadget-Mac> Out of interest, how critical is keeping payload weight down ?
[20:11] <mattbrejza> daveake: lt1959 has worked well for cameras and stuff for us
[20:12] <daveake> Thanks Matt
[20:12] <daveake> Will have a look
[20:12] <daveake> I bought some ready-made boards for < £5 each
[20:12] <mattbrejza> im guessing power requrements are similar and it didnt seem to get hot
[20:12] <daveake> Will try those first
[20:12] <Upu> Gadget-Mac very
[20:12] <mattbrejza> it powered two cameras btw
[20:12] <Gadget-Mac> daveake: Congrats on the internet fame. It's sparked a long term interest :)
[20:13] <Upu> less gas goes higher less change of damaging stuff on the way down
[20:13] <daveake> Need 500mA total. Most of that is at 3.3V and the board has a 5 --> 3.3V linear, which is coming out
[20:13] <Gadget-Mac> Thats what I thought.
[20:13] <Upu> theres no real excuse for a heavy payload unless your doing something scientific
[20:13] <mattbrejza> might as well bypass the on board 3.3V
[20:13] <Upu> look at everything and ask "is that really needed"
[20:13] <daveake> So I'll have 1 reg for battery -> 5V and another for battery -> 3.3V
[20:13] <Gadget-Mac> Ok, so getting rid of things like connectors is a good move
[20:14] <mattbrejza> if what you have meets power requirements might as well use that then making up a board
[20:14] <daveake> Gadget-Mac It's been an "interesting" week :)
[20:14] <Gadget-Mac> I bet.
[20:14] <Upu> well personally I use connectors but I'm thinking fluff like hand warmers, casing on say cameras, etc
[20:14] <Upu> My first payload was 900g
[20:14] <daveake> 1000g here
[20:14] <Upu> Pi , uAva and Buzz all together were 1000g
[20:14] <daveake> < 1kg for a photo payload is a good aim
[20:14] <Gadget-Mac> Ok.
[20:14] <Upu> yeah
[20:15] <Upu> where are you based Gadget-Mac ?
[20:15] <Gadget-Mac> Wolverhampton UK
[20:15] <Upu> ok come to the conference :)
[20:15] <kokey> it's a shame it's a PITA to use, say, a mobile phone camera module
[20:15] <nigelvh> My payloads tend to be about 1 pound, but I deal with a lot of student sciency stuff.
[20:16] <kokey> I have an iphone 4 camera here but looks like no one's managed to use one from an avr
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[20:16] <daveake> 1kg should get you a tracker, 2 cameras and a phone, easily.
[20:16] <Gadget-Mac> Seems to bring all my interests together, computing, space, remote sensors, amateur radio
[20:16] <daveake> ^^ why I started
[20:16] <Upu> yup snap
[20:16] <Upu> got a license Gadget-Mac ?
[20:16] <daveake> +photography
[20:16] <Gadget-Mac> Upu: Yup full
[20:16] <Upu> done any tracking ?
[20:16] <daveake> You'll fit in well
[20:16] <Upu> very well :)
[20:17] <Gadget-Mac> Oh, should I mention my degree is in 'Space science'
[20:17] <daveake> I'm still not in that little club :D
[20:17] <Dan-K2VOL1> where from mac
[20:17] <Upu> and you haven't done this already ? :)
[20:17] <daveake> lol
[20:17] <Gadget-Mac> Upu: Nope, ham radio kinda drifted off the radar
[20:17] <Gadget-Mac> Dan-K2VOL1: Leicester (where I still work)
[20:17] <Upu> still got a rig ?
[20:17] <Gadget-Mac> Somewhere yes
[20:17] <Dan-K2VOL1> ah UK?
[20:18] <Gadget-Mac> Yep.
[20:18] <Dan-K2VOL1> cool
[20:18] <Upu> I'd dig it out and get a cheap colinear up for 70cms
[20:18] <Upu> your in a good spot
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[20:18] <Gadget-Mac> Oh ?
[20:18] <daveake> Should have a flight in Notts on 28th
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[20:19] <Gadget-Mac> Unfortunately I'm in Devon on the 28th
[20:19] <Upu> receiving stations are always welcomed and you'll learn alot about how it all hangs together
[20:19] <Upu> without all the receivers I doubt the pictures from Pi would have been so complete
[20:19] <daveake> Definitely worth doing that before you fly
[20:19] <Gadget-Mac> Cool.
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[20:20] <daveake> Yeah, Pi drifted sometimes but always someone got it
[20:20] <Gadget-Mac> I'd also be interested to see if ballon flights could be applied to scouting as an activity
[20:20] <Upu> well funny you should mention it..
[20:20] <daveake> The 28th is for scout group !
[20:20] <daveake> a
[20:20] <Gadget-Mac> Ok, this is too spooky
[20:20] <daveake> lol
[20:21] <Upu> sounds like you found the right place
[20:21] <Gadget-Mac> Oh, also into tinkering with uP like arduino, here's the latest project http://max1284.homelabs.org.uk/
[20:22] <Upu> looks interesting
[20:22] <Upu> make the board yourself ?
[20:22] <jonsowman> ah wiznet
[20:22] <Gadget-Mac> Designed and sent to china for production
[20:22] <Upu> I have a suspicion your not going to struggle with this
[20:22] <jonsowman> i've been doing avr/enc28j60 tcp/ip stuff recently
[20:23] <jonsowman> perhaps should have gone for wiznet
[20:23] <Gadget-Mac> jonsowman: nanode ?
[20:23] <jonsowman> no, my own boards
[20:23] <Gadget-Mac> wiznet is fine as long as you don't want ipv6 :)
[20:23] <jonsowman> using uIP
[20:23] <Gadget-Mac> Ah, ok
[20:24] <Gadget-Mac> I'm planning a 1284p + enc424j600 as well :)
[20:24] <Gadget-Mac> But I digress.
[20:25] <Upu> so what do you have planned for a balloon ?
[20:25] <daveake> round is good
[20:25] <daveake> other shapes are available
[20:26] <Upu> I like Navrac's cigars
[20:26] <Gadget-Mac> Right now, no real plans. Sounds like it's one of those things once you start......
[20:26] <daveake> Well Feb last year I started, thinking I'd do 1
[20:26] <daveake> That happened this time last year
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[20:27] <daveake> and I'm somewhhere into double figures now
[20:27] <Upu> dave's not "launching as much" now
[20:27] <daveake> lol
[20:27] <Upu> I'd hate to see it when you really go for it
[20:27] <daveake> I did say that
[20:27] <daveake> :D
[20:27] <Gadget-Mac> So, the electronics side I understand costs etc, what the cost of balloons ?
[20:27] <Upu> http://www.randomsolutions.co.uk/Random_Aerospace/Welcome.html
[20:27] <Upu> depends on the size
[20:28] <daveake> A 1000g and 1kg payload works
[20:28] <daveake> To give you an idea
[20:28] <Upu> but as you've seen this weekend 1200g will easily lift 1kg
[20:28] <Upu> if you want to go stupid high you'll need bigger balloons but chasing altitude records is a silly hobby only undertake by silly people
[20:28] <daveake> Upu is silly
[20:29] <Upu> As is my erstwhile colleague daveake
[20:29] <Upu> is that even a word ?
[20:29] <daveake> "Brits with grit" it said lol
[20:29] <Gadget-Mac> lol
[20:29] <daveake> Amazingly, yes
[20:30] <Upu> Just to get a plug in I sell the electronic parts like the GPS modules and radios so give me a shout before you go spend silly money somewhere else
[20:30] <Laurenceb__> http://www.randomsolutions.co.uk/Random_Aerospace/News.html
[20:30] <Laurenceb__> heh
[20:30] <Laurenceb__> breaking _all_ the records
[20:30] <Upu> Steves the silliest :)
[20:31] <Gadget-Mac> Upu: Ok, cool. Which radios ?
[20:31] <Upu> NTX2 and the RFM22B
[20:31] <Upu> http://ava.upuaut.net/store
[20:31] <Upu> oh reminds me
[20:31] <Gadget-Mac> cool, rfm22b on the board I've done
[20:31] <Upu> I have a few HX1's in stock
[20:31] <Upu> for euro APRS
[20:32] <daveake> Gadget-Max Are you sure you haven't flown a balloon, and it slipped your mind? ;)
[20:32] <daveake> -x+c
[20:32] <Upu> Gadget-Mac just by turning up here you can have 10% off the prices on the store just use the coupon code UKHAS
[20:32] <Upu> and come to the conference in Sept :)
[20:32] <Upu> http://ukhas.org.uk/general:ukhasconference2012
[20:32] <jonsowman> how are numbers looking for the conf?
[20:33] <Gadget-Mac> daveake: Nope.
[20:33] <Upu> 19 or so atm
[20:33] <jonsowman> cool
[20:33] <daveake> I know I was joking :-). You seem to be ticking more "done that" boxes than a year's worth of newbies here
[20:33] <Upu> people are slow
[20:33] <daveake> 19? Thought it'd be double that by now
[20:33] <jonsowman> yes
[20:35] <Gadget-Mac> What sort of range do you get out of an RFm22b ?
[20:35] <jonsowman> more than enough
[20:35] <Upu> no real data on that, the power output does seem to be a little inconsistent but generally a few hundred miles
[20:35] <Upu> NTX2 based payloads have recorded 700km+ @ 10mW
[20:35] <Upu> I have no reason to doubt the RFM could do the same
[20:36] <jonsowman> and the RFM22 can go up to 25mW?
[20:36] <Gadget-Mac> Ok.
[20:36] <Upu> 100mW
[20:36] <jonsowman> not that that would be legal
[20:36] <jonsowman> but still
[20:36] <Upu> but at its "10mW" setting it wasn't as strong as an NTX2
[20:36] <Upu> it drags the power rail down to much at that power putput
[20:36] <jonsowman> has anyone spectrum analysed them?
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[20:37] <Upu> well Navrac has had issue
[20:37] <daveake> I have some FFT curves from the audio
[20:37] <Upu> the signal from pAVA was noticably less powerful than uAVA
[20:37] <daveake> somewhere
[20:37] <jonsowman> oh ok
[20:38] <Upu> needs more testing
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[20:38] <Upu> as a rudementary power saving I cut the power to 8db between transmissions and then put it back to 11dB on pava
[20:39] <Upu> but I think it caused a few issues as it hadn't settled down some people were reporting the $$P was corrupting
[20:39] <Upu> so I've amended the code and leave it at 11dB now
[20:39] <Gadget-Mac> So how do you get data from the RFM22B, 70cms' hams ?
[20:40] <Upu> ok so people round the country who are extremely cool and sexy tune their radios in
[20:40] <Upu> feed the audio signal into their PC's
[20:40] <daveake> receiver in SSB mode
[20:40] <Upu> and use dl-fldigi to decode it and upload to a centralised system called Habitat
[20:40] <Gadget-Mac> Ok.
[20:40] <Upu> http://ukhas.org.uk/guides:tracking_guide
[20:40] <Gadget-Mac> Could SDR do that ?
[20:40] <Upu> in theory yes
[20:41] <Upu> Something I suspect will be heavily tested next launch
[20:41] <Upu> http://ukhas.org.uk/guides:sdr_tracker
[20:41] <Upu> SDR is very new
[20:41] <Upu> but I'm sure its going to be embraced due to the low cost
[20:41] <daveake> Some of us have been using Funcube dongles with HDSDR, and that's worked very well
[20:42] <Gadget-Mac> Ok. SDR is something I have yet to venture into
[20:42] <jonsowman> does sdr# support the fcd out of the box?
[20:42] <Upu> yes
[20:42] <jonsowman> i've not used any of these windows SDR programs
[20:42] <Gadget-Mac> Have to confess I'm a linux guy
[20:42] <jonsowman> cool
[20:42] <jonsowman> yeah me too
[20:43] <Upu> I like sdr sharp over HDSDR
[20:43] <daveake> Just gets better lol
[20:43] <Upu> you can get it working on Linux
[20:43] <jonsowman> Gadget-Mac: there are gnuradio source blocks for the FCD and rtl-sdr
[20:43] <Upu> and when you do please add it to the Wiki
[20:43] <daveake> :)
[20:43] <Gadget-Mac> linux is my dayjob
[20:43] <jonsowman> you can get any old SSB decoder (i've got one for rtty) and then feed the audio to fldigi via portaudio
[20:43] <Upu> sort of mine too
[20:44] <jonsowman> Gadget-Mac: http://hexoc.com/u/rtl-xaben.png
[20:44] <Gadget-Mac> ok. Needs a reasonable amount of CPU then
[20:44] <jonsowman> give me a shout if you want a hand setting it up, though i imagine you won't need any help
[20:44] <jonsowman> it keeps 4 cores out of 6 at about 25% on my desktop
[20:45] <jonsowman> so a reasonable amount of CPU time, yes
[20:45] <Upu> yeah you need a decent CPU
[20:45] <Upu> P4 3.0Ghz doesn't cut it
[20:45] <Gadget-Mac> Does 100TFlop work ?
[20:46] <Upu> you overclocking ? :)
[20:46] <Gadget-Mac> No, just multicores
[20:47] <Upu> Well mine has 6100 bogomips whatever that is
[20:47] <jonsowman> it can do absolutely nothing 6100 million times per second
[20:47] <Upu> yay
[20:47] <jonsowman> lol
[20:47] <Upu> thats 1 core I have 8
[20:48] <Upu> ah yes I see now lol
[20:49] <Gadget-Mac> Meet ALICE http://www2.le.ac.uk/news/blog/images/april-2012/ALICECGB6511a250.jpg/image_preview
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[20:49] <Upu> LED's are good
[20:49] <Upu> what do you do with that ?
[20:49] <Upu> probably overkill for SDR
[20:50] <Upu> probably won't run Crysis >1600x1280 though
[20:51] <Gadget-Mac> Upu: personally I just make sure it runs. The researchers do the clever stuff, like predict stock market trends, and collide black holes
[20:51] <Upu> interesting
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[20:53] <Upu> well you shouldn't have an issue with a small tracker
[20:56] <kokey> I'm busy trying to compile gnuradio
[20:56] <kokey> with macports
[20:57] <kokey> or rather, getting it to start ok so I can leave it overnight
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[21:04] <Lunar_Lander> hello
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[21:07] <Lunar_Lander> daveake, Inserting a 220k resistor did not decrease the sensitivity!
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[21:11] <Lunar_Lander> but I noticed something
[21:11] <Lunar_Lander> when I looked at the formula in the datasheet that gave the output voltage as a function of supply voltage and RH, I calculated the output voltage for 100% RH
[21:11] <Lunar_Lander> and I got 2.574 V
[21:12] <Gadget-Mac> Out of interest how much does a raspberryPi weigh ?
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[21:13] <Lunar_Lander> daveake, so the sensor seems to be OK for the 2.56V reference if run at 3.3V?
[21:14] <daveake> yes
[21:14] <daveake> It's less than 2.56V, so no problem
[21:14] <daveake> Obvious, no?
[21:14] <Lunar_Lander> yea
[21:14] <Lunar_Lander> that means that I don't need more resistors?
[21:15] <daveake> Yes
[21:15] <daveake> Obvious, no?
[21:15] <daveake> Pi is ~ 45g
[21:16] <Lunar_Lander> yea
[21:16] <Lunar_Lander> it is obvious
[21:16] <daveake> Excellent
[21:16] <Lunar_Lander> save for 2.57 > 2.56
[21:16] <Lunar_Lander> can it damage the input pin?
[21:16] <Gadget-Mac> daveake: Ok, not much then
[21:16] <daveake> No, not to bad.
[21:16] <daveake> too
[21:17] <Lunar_Lander> yea
[21:17] <Lunar_Lander> I saw something strange though
[21:17] <daveake> LL: I very much doubt it, but ask the manual not me
[21:17] <Lunar_Lander> OK
[21:17] <daveake> you always do
[21:17] <Lunar_Lander> xD
[21:17] <Lunar_Lander> I pulled the wire from the voltage divider of the battery that goes to the arduino
[21:17] <Lunar_Lander> and I saw the voltage reading falling slowly until it showed a voltage of 1 V
[21:17] <Lunar_Lander> that was strange
[21:18] <daveake> why strange?
[21:18] <Lunar_Lander> I thought it would drop to 0 as there was no signal
[21:18] <daveake> Can you think of a circuit that would do what you saw?
[21:19] <daveake> Unless you know what the circuit is inside the A/D, you can't expect it to behave a certain way
[21:19] <Lunar_Lander> yea
[21:20] <Lunar_Lander> so I think that the anlog part of the system works :)
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[21:27] <griffonbot> @HighAltitudeLab: It has been some struggle with the analog Reference of the Arduino, but now the analog part of the system (BATT and Humidity) works! #ukhas [http://twitter.com/HighAltitudeLab/status/226065698777088000]
[21:31] Nick change: Laurenceb__ -> Laurenceb_
[21:31] <griffonbot> @vk5gr: http://t.co/QjEyd5Qs Latest doco video for the #ProjectHorus High Altitude Balloon project - demo of new flight termination systems #hab [http://twitter.com/vk5gr/status/226066795365277696]
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[21:32] <kokey> macports gnuradio dependency order is not right
[21:32] <kokey> looks like it's not going to be an unattended install tonight
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[21:55] <Lunar_Lander> Darkside, congrats on Horus 25!
[21:57] <Gadget-Mac> Ok, and guide to basic payloads ?
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[22:39] <nosebleedkt> cant sleep !
[22:39] <Lunar_Lander> hey nosebleedkt
[22:39] <Lunar_Lander> congrats!
[22:40] <nosebleedkt> oh thanks :)
[22:40] <nosebleedkt> but i ont have pics :)
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[22:41] <nosebleedkt> just nice telemetry results :pp
[22:41] <Lunar_Lander> yeah :)
[22:41] <Lunar_Lander> hope you find the payload :)
[22:42] <nosebleedkt> lol,me too
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[22:42] <Lunar_Lander> yea
[22:42] <nosebleedkt> all systems worked perfectly
[22:42] <Lunar_Lander> can you plot the data that you got via radio?
[22:42] <Lunar_Lander> cool
[22:42] <nosebleedkt> http://aprs.fi/?c=raw&call=SV7MKT-11&limit=300&view=normal
[22:43] <Lunar_Lander> cool
[22:43] <Lunar_Lander> I can see the string is latitude, longitude, altitude
[22:43] <Lunar_Lander> and what follows then?
[22:44] <nosebleedkt> some other gps data
[22:44] <nosebleedkt> then after | its sensor data
[22:45] <nosebleedkt> ext temp was corrupted
[22:45] <Lunar_Lander> yea
[22:45] <Lunar_Lander> ah
[22:45] <Lunar_Lander> 38.8 km!
[22:45] <nosebleedkt> i didnt parse correctly the minus degrees
[22:45] <nosebleedkt> yea
[22:45] <Lunar_Lander> yea
[22:45] <Lunar_Lander> is the 31 the outside temperature?
[22:45] <nosebleedkt> i hope the camera was working on 38.8
[22:46] <nosebleedkt> no, 31 is 3.1 volt
[22:46] <Lunar_Lander> yea
[22:46] <Lunar_Lander> ah
[22:46] <nosebleedkt> then int temp
[22:46] <nosebleedkt> ext temp
[22:46] <nosebleedkt> humidity
[22:46] <nosebleedkt> airpress
[22:46] <Lunar_Lander> ah
[22:46] <Lunar_Lander> 50% humidity at the highest altitudes
[22:47] <nosebleedkt> that sensor sucks
[22:47] <Lunar_Lander> so we need to expose the sensor to the outside if we want atmospheric humidity
[22:47] <nosebleedkt> yes
[22:47] <Lunar_Lander> you are right
[22:47] <nosebleedkt> that was internal
[22:47] <nosebleedkt> humid
[22:47] <Lunar_Lander> today I finally won the battle against it to run at 3.3V
[22:48] <nosebleedkt> lol
[22:48] <nosebleedkt> WIDE2-1,qAR,YO7LMU-10:>40.8371,22.9353,38834,264,119,-004,10,1101|31,+21,+28,46,0 3|0684,FF
[22:48] <nosebleedkt> that the highest alt
[22:48] <jcoxon> evening all
[22:48] <nosebleedkt> hi jcoxon
[22:48] <nosebleedkt> that 0 3 is the pressure in milibars from sparkfun sensor
[22:48] <Lunar_Lander> hi jcoxon
[22:49] <Lunar_Lander> cool
[22:49] <nosebleedkt> not quite sure its normal
[22:49] <Lunar_Lander> yeah I think it should be very dry up there
[22:49] <Lunar_Lander> wait
[22:49] <nosebleedkt> 3mbars at 38.8km
[22:49] <nosebleedkt> :P
[22:50] <Lunar_Lander> yea
[22:50] <fsphil> no pressure then
[22:50] <Lunar_Lander> that's 300 Pascals
[22:51] <Lunar_Lander> according to the US Standard Atmosphere of 1976 that's a geometric altitude of 39675.6 m
[22:51] <fsphil> and yet still windy enough to throw a payload around
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[22:51] <nosebleedkt> look 38834 is last emmited telemetry
[22:51] <nigelvh_> Yeah, I use vacuum referenced baro sensors and generally get down to a few millibars up at the top.
[22:52] <nosebleedkt> my program was saving every 10s on microsd
[22:52] <nosebleedkt> and broadcasting every 30s
[22:52] <nosebleedkt> we dont know if it reached a higher alt those missing 20s
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[22:53] <Lunar_Lander> yeah
[22:53] <Lunar_Lander> there was a funny thing here
[22:53] <jcoxon> nosebleedkt, while i was searching for your balloon on athens i found another balloon tracker in greece being tested
[22:53] <Lunar_Lander> I said to my team "we can use openlog or microsd"
[22:53] <nosebleedkt> if the sparkfun sensor value of 3mb is normal then they should change its specs on sparkfun page. They write 300mb at minimum
[22:53] <Lunar_Lander> but then I noticed that the microsd has 7 pins and openlog has 6
[22:53] <Lunar_Lander> yeah
[22:53] <Lunar_Lander> jcoxon, XD that sounds a bit like Knight Rider
[22:54] <Lunar_Lander> "Michael, I found another radiofrequency signal nearby"
[22:54] <nosebleedkt> jcoxon
[22:54] <nosebleedkt> what?
[22:54] <nosebleedkt> my balloon in athens? im from thessalonike
[22:54] <nosebleedkt> north greece
[22:55] <nosebleedkt> what other tracker? give me some link
[22:55] <jcoxon> SV1BYK-7
[22:56] <nosebleedkt> ee
[22:56] <nosebleedkt> im not sure if its a HAB project
[22:56] <jcoxon> 'Baloon-Experimental
[22:56] <jcoxon> who knows
[22:57] <nosebleedkt> :P
[22:57] <nosebleedkt> well
[22:57] <nosebleedkt> i got a question
[22:57] <nosebleedkt> while the flight were ok
[22:57] <nosebleedkt> but not recevered the payload
[22:57] <nosebleedkt> how successful do we consider it?
[22:58] <fsphil> the flight was fully successful :)
[22:58] <nosebleedkt> I mean flying a payload at that 38.8km and having a valid landing point
[22:58] <fsphil> how does it feel to have done it?
[22:58] <jcoxon> thats very valid
[22:58] <jcoxon> a success
[22:58] <nosebleedkt> ok
[22:58] <jcoxon> you going to try and recover it?
[22:58] <nosebleedkt> jcoxon: of cource
[22:58] <nosebleedkt> i cant sleep mean
[22:58] <nosebleedkt> man*
[22:59] <fsphil> I've only recovered half my payloads but I still consider them successful
[22:59] <nosebleedkt> lol
[22:59] <nosebleedkt> optimistic
[22:59] <fsphil> they all provided useful data
[22:59] <nosebleedkt> yes
[22:59] <fsphil> although yea I'm a bit disappointed about not getting the pics back from one of them
[22:59] <nosebleedkt> i only feel happy because aprs telemetry was working so smooth
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[23:00] <nosebleedkt> I want to get on that list
[23:00] <nosebleedkt> with payloads and altituddes
[23:00] <nosebleedkt> not the english one
[23:00] <nosebleedkt> i think there is another
[23:00] <fsphil> arhab
[23:00] <nosebleedkt> but cant remember
[23:00] <fsphil> you might get on now, but in future they're going to require advance notification
[23:00] <nosebleedkt> what is that?
[23:01] <nosebleedkt> NOTAMS?
[23:01] <fsphil> nah, just a form they have on the website
[23:01] <fsphil> seems a bit silly tbh
[23:01] <nosebleedkt> dont get it
[23:01] <nosebleedkt> but ok
[23:04] <Darkside> http://vimeo.com/46031355
[23:05] <nosebleedkt> well its funny cause i though my payload would be 1kg
[23:05] <nosebleedkt> but in the end it was 1.346kg
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[23:05] <nosebleedkt> with parachute and rows
[23:06] <nosebleedkt> and another thing i noticed is that I didnt get less than +10C inside the payload
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[23:06] <nosebleedkt> while outside i got arround -30c
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[23:07] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/578760_494008467279869_1659144890_n.jpg
[23:07] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/529049_494010357279680_1198858270_n.jpg
[23:07] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/311578_493994090614640_846801155_n.jpg
[23:08] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/315418_493994107281305_615907593_n.jpg
[23:08] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/549671_493994183947964_1479340697_n.jpg
[23:08] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/306643_493994333947949_910965504_n.jpg
[23:08] <nosebleedkt> last time i sew it :P
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[23:26] <nosebleedkt> i have this string: 40.7187,23.2231,00570,272,022,-004,10,0856|31,+35,+31,45,0949|0138,FF,BABALU
[23:26] <nosebleedkt> how do i get only 40.7187,23.2231,00570 using regular expressions?
[23:26] <nosebleedkt> the first 3 comma
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[23:27] <Randomskk> ^([^,]+,[^,],[^,]).+$
[23:27] <Randomskk> maybe something like that
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[23:30] <nosebleedkt> got it
[23:30] <nosebleedkt> :P
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[23:35] <nosebleedkt> well
[23:35] <nosebleedkt> <extrude>1</extrude>
[23:35] <nosebleedkt> <tesselate>1</tesselate>
[23:35] <nosebleedkt> <altitudeMode>absolute</altitudeMode>
[23:35] <nosebleedkt> <coordinates>
[23:35] <nosebleedkt> 40.7187,23.2231,00570
[23:35] <nosebleedkt> blabla...
[23:36] <nosebleedkt> in my kml file
[23:36] <nosebleedkt> and it goes to saudi arabia
[23:36] <nosebleedkt> but if you paste 40.7187,23.2231 on google earth
[23:36] <nosebleedkt> it goes to correct point
[23:36] <nosebleedkt> what amI missing?
[23:40] <Randomskk> might be in the wrong order
[23:40] <Randomskk> I think google coordinates are lng,lat or something stupid
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[00:00] --- Fri Jul 20 2012