highaltitude.log.20110719

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[00:18] <Lunar_Lander> Dan-K2VOL still there?
[00:19] <Lunar_Lander> hi juxta
[00:19] <Dan-K2VOL> yeah workin
[00:20] <Lunar_Lander> ah
[00:20] <Lunar_Lander> btw the Sharp dust sensor
[00:21] <Lunar_Lander> can you actually get it to something like
[00:21] <Lunar_Lander> that you have in the end not like a qualitative result but also like a quantitative result for the amount of dust in the air?
[00:22] <Dan-K2VOL> yes, you can get a calibrated one from the manufacturer
[00:22] <Dan-K2VOL> we didn't though
[00:23] <Lunar_Lander> ah
[00:23] <Lunar_Lander> so these ones come from Sharp directly?
[00:35] <Lunar_Lander> or where do I have to ask?
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[00:48] <Lunar_Lander> Dan-K2VOL do you have this info too, please?
[00:54] <Dan-K2VOL> oh oh
[00:54] <Dan-K2VOL> sorry Lunar_Lander
[00:55] <Lunar_Lander> no problem
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[01:06] <Dan-K2VOL> the data sheet says to contact Sharp for a source of calibrated sensors I think Lunar_lander, I"ll check later
[01:06] <Dan-K2VOL> about to raise speedball-1 on the pulley system
[01:07] <Lunar_Lander> ah OK
[01:07] <Lunar_Lander> thanks
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[01:45] <Lunar_Lander> OK
[01:45] <Lunar_Lander> good night
[01:45] <Lunar_Lander> good night Dan-K2VOL
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[06:32] <mattltm> Mornin all :)
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[06:44] <number10> morning
[06:45] <mattltm> Hi number10 :)
[06:51] <number10> hi there
[06:53] <mattltm> Hows it going?
[06:54] <number10> ok - start work too early really
[06:56] <mattltm> Tell me about it. Thankfully, I did a Saturday and a late night last night so I wont be goint in to worl till 12 ish today :)
[06:56] <mattltm> Not so great that I have to be there till 8pm tonight though :(
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[06:57] <number10> doesn't sound too good - I think I'll put up with the early starts and early finishes - mind you I am 1/2 asleep by 9
[06:59] <mattltm> lol. Im 1/2 asleep all the time!
[06:59] <jcoxon> morning
[07:00] <number10> morning
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[07:04] <DanielRichman> hey jcoxon - did you get the email I forwarded to you?
[07:06] <DanielRichman> I hope you can still trivially do mac builds
[07:06] <jcoxon> yeah
[07:06] <jcoxon> i can indeed
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[07:08] <jcoxon> just running configure now
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[07:22] <jcoxon> hmmm has thrown an error
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[07:26] <Upu> just looking at fsphil's source code : rtx_string_P(PSTR(PREFIX CALLSIGN ":Geronimo!!!!\n")); :)
[07:26] <jcoxon> ping DanielRichman
[07:26] <fsphil> only one person spotted that in fldigi :)
[07:27] <jcoxon> ooo fsphil can help
[07:27] <jcoxon> you know steve has made that change from fscanf to sscanf
[07:27] <jcoxon> to allow all gpses to work
[07:27] <fsphil> aye
[07:27] <fsphil> I think it should be fscanf
[07:27] <jcoxon> well he has left sscanf reading a file
[07:27] <fsphil> yea
[07:27] <fsphil> I think he had a string in there to test with
[07:27] <fsphil> forgot to change it back
[07:27] <jcoxon> okay
[07:28] <jcoxon> i'll make the change
[07:28] <fsphil> the changes to the format seem good, I didn't know %[^,] would break if the string was zero characters long
[07:28] <fsphil> seems stpid
[07:28] <fsphil> +u
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[07:29] <fsphil> I'll give it a spin with my gps usb thingy later when I get home
[07:30] <Darkside> morning
[07:30] <fsphil> hehe, morning Darkside
[07:31] <Darkside> apparently my 'core hours' are 10am to 4pm
[07:31] <griffonbot> Received email: James Coxon "Re: [UKHAS] Re: Request for arduino set up!"
[07:31] <Darkside> so i'll probably get there around 9am
[07:32] <Darkside> soooo much PCB work to do
[07:32] <jcoxon> fsphil, done
[07:32] <Darkside> need to recreate their current schematic in altium designer, then get started on pcb layout
[07:32] <jcoxon> Darkside, who you working for?
[07:33] <Darkside> jcoxon: University of Bath, elec eng department
[07:33] <jcoxon> cool
[07:33] <Darkside> helping out with their TOPCAT payload, for UKube-1
[07:33] <jcoxon> nice part of the world
[07:34] <Darkside> yeah, i need to get into town more
[07:34] <Darkside> ill be staying there from next week anyway
[07:34] <Darkside> this week i'm in uni accomodation, which is pretty nice
[07:34] <jcoxon> fsphil, i think we should make a dl-fldigi release
[07:34] <jcoxon> but perhaps add custom shifts in first
[07:35] <fsphil> in the autoconfigure?
[07:35] <jcoxon> yeah
[07:35] <fsphil> sounds good
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[07:35] <Darkside> can you add in the higher baud rate stuff too? even if it doesn't work
[07:35] <fsphil> might it be best just to assume a custom shift all the time?
[07:35] <fsphil> I added 600 and 1200 baud Darkside
[07:35] <Darkside> ooh
[07:35] <Darkside> nice
[07:36] <fsphil> 1200 works, at least at short range in my room
[07:36] <Darkside> will need to do some experimentation
[07:36] <fsphil> but it needs 2 stop bits
[07:36] <fsphil> fldigi just won't work properly with just 1
[07:36] <Darkside> interesting
[07:37] <Darkside> well, i have my payload here, i can do some experimentation
[07:37] <fsphil> I'd like to try it in a future flight, but not as the main payload
[07:37] <Darkside> yeah
[07:37] <Darkside> use it for your picture stuff
[07:38] <fsphil> indeedy - would take under 2 minutes per pic
[07:38] <Darkside> mmm
[07:38] <daveake> Nice, I can see another receiver purchase coming ...
[07:38] <Darkside> i want to find out what the funcube is doing for their 1kbaud BPSK transmitter
[07:38] <Darkside> i think its 500mW
[07:38] <fsphil> yes that does look good
[07:39] <Darkside> i'll probably have the opportunity to talk to the designer soon anyway
[07:39] <Darkside> also planning on setting up a UKube ground station in adelaide when i get back
[07:39] <fsphil> Phil Karn created the mode for it, same guy who did all the error correction code I'm using in ssdv
[07:39] <Darkside> ooh nice
[07:40] <Darkside> apparently sone of my payloads data will be coming down the VHF link
[07:40] <Darkside> though most will be transmitted on the S-Band telemetry feed
[07:41] <fsphil> just outside the funcube dongles range :)
[07:41] <Darkside> way outside its range
[07:41] <Darkside> 2.1GHz or something
[07:42] <Darkside> no wait 2401.5MHz
[07:42] <fsphil> my funcube will tune up that high but I've no idea if it's receiving anything sensible
[07:42] <Darkside> heh
[07:42] <fsphil> nothing to test it with
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[07:43] <fsphil> I can receive the ntx2 up at 1.6ghz-ish
[07:44] <jcoxon> fsphil, you know we've had 519 downloads of dl-fldigi r115
[07:44] <jcoxon> and thats only windows and mac
[07:44] <fsphil> that's brilliant!
[07:45] <fsphil> I bet a fair chunk are from the states
[07:46] <jcoxon> i suspect so
[07:46] <fsphil> Bill's last flight was a bit odd - he seemed to be the only receiver
[07:46] <fsphil> nobody else could hear it
[07:46] <jcoxon> that is odd
[07:46] <jcoxon> he is well placed though
[07:47] <fsphil> yea
[07:48] <Darkside> wifi
[07:49] <fsphil> after the release I'll try and merge with upstream, I've a feeling it'll break stuff
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[07:50] <jcoxon> or is it worth us doing the merge now?
[07:50] <fsphil> Darkside, there was some noise but I'm not sure what a wifi signal is suppose to look like
[07:50] <fsphil> ooh -- I've a 2.4ghz video sender, it should have an audio carrier that'll fit in the 80khz
[07:51] <fsphil> jcoxon, worth trying I suppose - can always be undone
[07:52] <fsphil> oh git - could merge into another branch
[07:53] <jcoxon> we are quite behind looking at the log
[07:53] <fsphil> yeps
[07:54] <fsphil> There was a widget removed last time, can't remember what it was - will look it up
[07:54] <fsphil> but the dl interface used it
[07:55] <natrium42> o/
[07:55] <jcoxon> i think we are over a year out of sync
[07:56] <jcoxon> nah we can't be
[07:56] <fsphil> might be worth bumping up the library versions used for the windows build
[07:56] <jcoxon> but the binary i built is 3.20.34
[07:56] <fsphil> nah, it's about 5 months
[07:56] <jcoxon> and the highest i found was 3.20.11
[07:57] <jcoxon> hey natrium42
[07:57] <jcoxon> whats the best way do you reckon?
[07:57] <fsphil> "Fl_Tile_Check" is what was removed
[07:58] <natrium42> yo, in istanbul airport
[07:58] <natrium42> any news?
[07:58] <jcoxon> natrium42, nothing much
[07:58] <jcoxon> few launches recently
[07:59] <fsphil> I'll do a merge when I get home - I think there's been another release since i last tried
[07:59] <fsphil> I'll keep it in a separate branch until we can get it tested
[07:59] <fsphil> so if it starts to cause trouble, we can release the stable older version
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[08:00] <jcoxon> agreed
[08:00] <jcoxon> looks like some packet modem stuff is making its way into fldigi
[08:00] <fsphil> ooh
[08:00] <fsphil> was that in the last release?
[08:01] <jcoxon> http://git.berlios.de/cgi-bin/gitweb.cgi?p=fldigi;a=commit;h=4931d1d150e665fe28f1d797f0d497db0eba59fb
[08:04] <fsphil> neat
[08:04] <fsphil> hopefully this will kill off that nasty psk program :)
[08:04] <jcoxon> with packet in place fldigi would be able to do nearly everything
[08:05] <fsphil> all but sstv
[08:05] <fsphil> and I bet someone's working on that
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[08:06] <jcoxon> need to improve the decoders really
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[08:10] <fsphil> the rtty is weird - there's times I see it decode when I don't think it should, when the signal is barely on the waterfall
[08:10] <fsphil> then other times it struggles with a strong signal
[08:13] <daveake> Is the strong signal clipping?
[08:14] <daveake> I doubt it - seems to cope with that too
[08:14] <fsphil> not sure - it could be something else, like timing
[08:15] <daveake> Just a guess :-)
[08:15] <fsphil> though fldigi seems pretty tolerant of small baud errors
[08:15] <daveake> It coped with about 5.5% error in my timer, for most of the time :)
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[08:20] <fsphil> I had a bug on my second flight that meant the baud rate was 288 instead of 300
[08:20] <SamSilver> jcoxon: have you seen this http://www.noaa.inel.gov/projects/whissp/whissp.htm
[08:21] <SamSilver> it is half an ocean drifter and a thered balloon
[08:22] <SamSilver> it seems the balloons lasted for a few days - tough buggers!
[08:23] <jcoxon> i haven't
[08:23] <daveake> fsphil in my case things were working, mostly, and I thought the odd bad character was something amiss in the radio side. Eventually I'd checked everything else, so I put a logic analyser on the Tx line from the processor. The analyser decoded the stream 100% correctly, but then when I waved the mouse in the gap between pulses it showed a gap of about 19ms instead of 20 ...
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[08:26] <fsphil> sneaky
[08:27] <fsphil> everyone needs an analyser
[08:27] <daveake> Absolutement
[08:27] <daveake> Never had one before. Mine is a £125 8-channel USB thing from Proto-Pic. Worth its weight in helium.
[08:28] <jcoxon> http://wa5znu.org/2011/07/cascata/
[08:28] <jcoxon> interesting idea
[08:28] <fsphil> what sort of speed can it run at daveake?
[08:28] <daveake> 25MHz
[08:28] <daveake> Plenty fast enough for i2c, spi, rs232, can bus etc
[08:29] <NigelMoby> Bah
[08:29] <daveake> And 8 channels is enough for that sort of stuff too. Don't think I've used more than 4 so far
[08:29] <NigelMoby> Asda suck
[08:33] <fsphil> jcoxon, cute!
[08:34] <fsphil> using the internal ADC too
[08:34] <jcoxon> might be useful for our ukhas rtty repeater
[08:35] <fsphil> would mean having an SSB receiver though
[08:35] <jcoxon> eek
[08:36] <jcoxon> bbl
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[08:38] <fsphil> the little maple board would be nifty for in-flight receiving. it's got a pretty fast arm processor
[08:41] <NigelMoby> Maple.... I'm eating maple pancakes ...
[08:41] <fsphil> mmmm
[08:42] <NigelMoby> Yum Yum
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[09:15] <fsphil> damn, got the mario theme in my head
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[09:16] <SamSilver> fsphil: lol * blush - I had "I'm a barbie girl" for a few days.
[09:18] <daveake> Ever been to Disney? "It's a small, small world ..."
[09:18] <daveake> It needs physical surgery to remove that one.
[09:22] <fsphil> the only safe way to watch a disney movie is with ear plugs and a blindfold
[09:23] <daveake> :)
[09:23] <SamSilver> and mario on a handheld
[09:23] <SamSilver> portable
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[09:50] <SamSilver> afk
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[10:29] <fsphil> request for a september notam sent. wonder if it'll get done in time
[10:30] <daveake> You'll get it through 1 day before launch :)
[10:31] <fsphil> likely lol
[10:31] <number10> where are you launching from?
[10:31] <fsphil> place called An-Creggan (sp?) -- about as middle of nowhere you can get in n.ireland
[10:32] <fsphil> but it's about as far from the coast and the big lake as you can get here, so is a good launch site
[10:33] <number10> sounds fun - I have no idea about tracking these things - could the signal be received in east anglia?
[10:33] <fsphil> also reasonably far from the border so I don't have to deal with the IAA
[10:33] <fsphil> number10, indeed! the last one was picked up in london
[10:34] <number10> excelent - I just won a bid on an AR8000 hopefully sensitive enough
[10:34] <fsphil> what antenna do you have?
[10:35] <number10> have not purchased yet about to look - any suggestions?
[10:36] <fsphil> a little whip seems to be good for near-ish launches. anything launched from Cambridge would come in pretty loud where you are
[10:36] <fsphil> for something as far as mine, probably a yagi
[10:38] <number10> thanks fsphil - I'll have a search- I work in a place that has quite a few RF engineers maybe I can see what they have - got to go out for a while - brb
[10:38] <fsphil> handy :)
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[10:39] <number10> back in a mo
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[10:49] <daveake> Re aerials, after I'd bought my Yagi on ebay, I met up with a local radio ham who said "I've got a whole garage full of aerials; you could have taken what you need" !
[10:54] <griffonbot> Received email: Josh Taylor "Re: [UKHAS] Re: Request for arduino set up!"
[10:55] <fsphil> d'oh!
[10:57] <GW8RAK> That's the way it goes daveake. I've been given plenty, but none for 70cm unfortunately.
[11:00] <daveake> I might bend his ear sometime - he's even written books on radio. I was hoping to get him tracking for me but he didn't reply to the email.
[11:01] <daveake> This guy - http://g7rau.co.uk/articles/g3naq/default.html
[11:02] <daveake> Like radio signals themselves - way above my head :).
[11:03] <fsphil> ah, he's one of these wizard that understand the dark arts?
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[11:23] <daveake> Yes .. a wizard and a very dark art. A friend of mine on the same electronics course at Uni went on to design aerials. After 2 years he told me "I still don't know how they work!"
[11:24] <daveake> In other news, I just now super-glued my foot to the desk. That'll teach me not to leave tubes of superglue around ...
[11:24] <daveake> The sock is a write-off lol
[11:24] <GW8RAK> If you want to be confused, read the controversy about EH Antennas.
[11:25] <BrainDamage> EH?
[11:25] <daveake> Do they use an extra level of magic?
[11:26] <GW8RAK> Typically, they are two short and fat tubes, one above the other with a coil between them and a feed impedance matching coil.
[11:27] <GW8RAK> Apparently they contravene the laws of physics, but work up to a point. Ideal for small spaces.
[11:28] <GW8RAK> http://www.wb5cxc.com/ An 8m aerial only 6' tall.
[11:29] <GW8RAK> Sorry 80m/3.5MHz aerial only 6' tall
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[11:34] <fsphil> nice
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[11:37] <fsphil> aarg my eyes!
[11:38] <M0JSN> what is it with hams and truly terrible web design
[11:38] <fsphil> it never ceases to amaze me
[11:44] <NigeyS> that is ... well .... horrid :|
[11:47] <daveake> I once accidentally ended up on a worse site. The text was pretty much invisible against the background (blue on cyan or something). The site was for an American society for the blind. I guess they were trying to equalise things ...
[11:48] <fsphil> or increase their membership
[11:49] <daveake> lol
[11:52] <LazyLeopard> M0JSN: It's not just hams, it's 99% of the general public... ;)
[11:52] <M0JSN> hehe
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[13:31] <jkominar> Hey guys - does the predictor's math take into account the lack of air resistance at apex when determining the descent time? I.e. if I know my parachute falls at 5.5m/s at ground level, it takes care of the rest?
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[13:37] <Dan-K2VOL1> jkominar I do not know officially, but it certainly should
[13:38] <Dan-K2VOL1> as it's usually fairly decent
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[13:48] Nick change: rambo -> kd0mto
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[14:10] <jkominar> Dan-K2VOL1 thanks! I expected as much .. was just looking for a sliver of confirmation :)
[14:11] <jkominar> doing my first ever launch this Saturday and trying to make sure all the I's are dotted and T's are crossed.
[14:11] <fsphil> ooh
[14:12] <fsphil> good luck :)
[14:12] <jkominar> thanks
[14:12] <jkominar> sent our payload up on a hang glider last weekend for a semi-high-altitude radio test and it worked like a charm, so we're feeling positive.
[14:13] <fsphil> good test method
[14:13] <jkominar> yeah .. they took it up to about 2000ft
[14:14] <jkominar> did a seperate parachute drop test too with a dummy load on it (just in case :) and I was able to use my pocket radar to measure its drop speed... so we have pretty good numbers to plug into the predictor
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[14:17] <fsphil> that's dedication
[14:17] <fsphil> is it not ackward to carry something onto a hang glider?
[14:17] <fsphil> I've never done it but it looks like you'd have your hands full
[14:18] <jkominar> It was strapped over the butt of the pilot ... he's an 18-year seasoned hang gliding pro and he told me he forgot it was even there.
[14:18] <jkominar> Latched on to the rigging lines that held his harness to the airframe
[14:19] <jkominar> the parachute drop test was stuffed into the parachute flap of the body harness which was empty since they don't normally have chutes on the types of flights they do, I guess ... so he just had to rip open the flap on his chest (which is pointing down) and out falls the chute.
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[14:20] <fsphil> very cool
[14:22] <jkominar> oh, one more confirmation: the neck lift figure that the burst calculator provides ... that's the amount of dummy load the balloon should be just barely lifting off the ground to know you have the right amount of gas in the balloon when you remove the load and attach the payload, correct?
[14:22] <fsphil> yes
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[14:23] <fsphil> it should float if you lift it up and let go
[14:23] <fsphil> neither going up or down
[14:23] <jkominar> right ...
[14:23] <jkominar> perfect
[14:23] <fsphil> (being careful when letting go :)
[14:23] <jkominar> but of course ... :)
[14:25] <jkominar> do you use a clamp to squeeze the balloon nozzle so the helium doesn't escape while you're checking for that amount of float?
[14:25] <fsphil> I've used cable ties
[14:26] <jkominar> but if you find there isn't enough gas, wouldn't you have to cut the cable tie?
[14:26] <jkominar> (risking damaging the balloon)
[14:27] <fsphil> we always cut those cable ties off, carefully
[14:27] <fsphil> then put some more on to seal the balloon
[14:27] <Darkside> juxt has filling apparatus with a tap
[14:27] <Darkside> so you turn off the tap, and then weigh the lift
[14:27] <Darkside> and just account for the weight of th efilling apparatus
[14:28] <jkominar> huh .. clever
[14:28] <Dan-K2VOL1> the neck of the balloon is very thick rubber jkominar, you can cut a cable tie off it easily
[14:29] <jkominar> any other common noob mistakes you guys have encountered that I should be aware of?
[14:30] <Dan-K2VOL1> make sure your batteries will last for much longer than you expect to be in the air for, test your electronics in the cold
[14:31] <fsphil> make sure that landing on the antenna or other external bit won't affect the innards
[14:32] <fsphil> bring a long pole :)
[14:32] <fsphil> unless you're launching in a desert or somewhere else with no trees
[14:32] <jkominar> I think we'll bring a chainsaw :)
[14:32] <fsphil> ooh I like your thinking
[14:33] <fsphil> will this flight be on spacenear.us?
[14:33] <jkominar> we're in Ontario, Canada ... same kinda area that Natrium42 launches ... in fact, we'll probably be launching from very a similar location to where he uses. Although there are lots of rural farms around with good clear landing space, there's still a reasonable quantity of trees around.
[14:34] <jkominar> it won't be on spacenear.us unfortunately. We're using APRS to track.
[14:34] <jkominar> unless I missed something and there's a way for it to track an APRS flight.
[14:36] <fsphil> not currently, although SAIDias has a version that works with aprs
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[14:37] <Dan-K2VOL1> oh cool jkominar, you should go to MakerFaire Detroit, we'll be flying a big balloon indoors
[14:38] <jkominar> APRS.fi has a data export module that spits out a KML file that constantly reloads itself for a specified radio callsign, so I'll be sending out that KML file to all my friends/family and they can watch the balloon in near-real-time in 3D space via Google Earth.
[14:38] <jkominar> That's as close to spacenear.us as our maiden flight will get :)
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[14:39] <fsphil> will certainly keep an eye on it!
[14:39] <edmoore> what's new?
[14:40] <fsphil> g'day edmoore, just chatting about jkominar's launch in canada this weekend
[14:40] <edmoore> cool
[14:41] <edmoore> Darkside: are you here yet?
[14:41] <SamSilver> shhuu glad we finished talking about cable ties before edmoore got here!
[14:41] <edmoore> DON'T
[14:41] <edmoore> ahem
[14:41] <jkominar> bad experience? :)
[14:42] <fsphil> yea that was close lol
[14:42] <SamSilver> lol
[14:42] <edmoore> ok, ideas for cells that will have to be able to deliver 5A for <1s at -50 celcius?
[14:42] <edmoore> jkominar: use cable ties at -40 celcius and you'll have a bad experience too
[14:42] <Darkside> er1k757_: yes
[14:42] <Darkside> edmoore:
[14:43] <Darkside> im at the uni right now
[14:43] <edmoore> Darkside: cool
[14:43] <edmoore> when did you arrive - yest?
[14:43] <Darkside> yeah
[14:43] <Darkside> yesterday morning
[14:43] <jkominar> so duct tape the nozzle then? not a cable tie?
[14:43] <Darkside> jkominar: multiple cable ties
[14:43] <edmoore> cool. i guess you're a bit pooped
[14:43] <Darkside> works fine for us
[14:44] <edmoore> what kind of nozzle?
[14:44] <Darkside> edmoore: to the contrary, i think i'm getting over the jetlag
[14:44] <jkominar> we have a Kaymont 1500
[14:44] <jkominar> and whatever latex nozzle that comes attached to that ;-)
[14:44] <Darkside> we use PVC pipe
[14:44] <Darkside> >_>
[14:44] <edmoore> oh i see
[14:44] <edmoore> yes add duct tape
[14:44] <edmoore> cable ties and duct tape
[14:45] <jkominar> I don't mean to fill, I mean to seal the balloon for its actual launch.
[14:45] <edmoore> yup
[14:45] <edmoore> we use both
[14:46] <edmoore> jkominar: http://ukhas.org.uk/guides:sealing_the_balloon
[14:49] <edmoore> test
[14:51] <Zuph> test back
[14:51] <Zuph> How are things, edmoore?
[14:52] <edmoore> all good
[14:53] <edmoore> just picking the brains of some people on electronics chanel
[14:53] <edmoore> and with you?
[14:54] <Zuph> Another day, another $.
[14:54] <edmoore> :)
[14:54] <Zuph> In my experience, the guys on ##electronics are unfriendly curmudgeons.
[14:54] <edmoore> i'm designing some instrumentation and control stuff for the heavy high altitude drop test vehicle
[14:55] <edmoore> turns out that to conform to nasa standards a pyro firing circuit is more than just a FET...
[14:55] <SpeedEvil> ?No single point of failire I guess
[14:56] <edmoore> well there's lots of redundancy system wide
[14:56] <edmoore> but per pyro circuit there's all sorts of relay interlocks, current limiting circuits, static bleed resistors, ground loop checking etc
[14:56] <edmoore> it's actually quite interesting
[14:57] <Zuph> Sounds like it..
[14:57] <edmoore> and i get to design in really nice mil connectors
[14:57] <Zuph> Seems like relays would be a big point of failure.
[14:57] <edmoore> apparently not
[14:57] <edmoore> they seem pretty reliable :)
[14:58] <edmoore> and you can get complete electrical isolation of different parts
[14:58] <edmoore> whereas there's leakage with fets
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[14:58] <Dan-K2VOL1> hmm interesting
[14:59] <Dan-K2VOL1> I had no idea relays would fly in space!
[14:59] <edmoore> totally
[14:59] <edmoore> most landers accdept for mega high G things use relays
[14:59] <Zuph> Heh, I'd hate to see the price on NASA spec high-G relays.
[14:59] <Dan-K2VOL1> fascinating, I'd love to hear them clicking and clacking in simulations
[15:00] <edmoore> :)
[15:01] <SpeedEvil> Also - there are't issues with high energy particles with relays, and they are nice and slow
[15:01] <edmoore> but it'll be an (opto isolated) fet to actually make it bang
[15:01] <edmoore> the relays are for arming and detecting separation from the balloon
[15:01] <SpeedEvil> you can trip off the driver circuit if it latches up for some reason
[15:01] <SpeedEvil> Before the relay goes on
[15:01] <Zuph> SpeedEvil: Fair enough. I'd think a nice power FET would have big enough structures that it wouldn't be a huge deal, though.
[15:01] <edmoore> i agree
[15:02] <edmoore> i think it's mainly isolation
[15:02] <Dan-K2VOL1> ha the museum we're exhibiting at wants a Safety Plan in case of a helium leak. really. our exhibit is quite clearly a balloon with a giant helium leak in it
[15:02] <edmoore> but sure yes you could do it with fets
[15:02] <edmoore> safety plan - be on the floor and not the ceiling
[15:02] <Zuph> Things I would like to work on: Software Rad Hardening using verified (Mathematically Proven) OS kernel.
[15:03] <Dan-K2VOL1> "In the event of helium leak, helium will go to the ceiling and people can continue on about their business on the floor"
[15:03] <SpeedEvil> Dan-K2VOL1: Announce to people in a loud clear comedy voice 'don't panic, don't panic, please make your way to the gift shop'
[15:03] <Dan-K2VOL1> ha
[15:03] <fsphil> the roof will be a bit lighter for a few moments
[15:04] <fsphil> how big is the room you're flying in Dan-K2VOL1? any sharp objects on the roof?
[15:06] <Zuph> The Henry Ford Museum
[15:06] <Zuph> 30,000 square feet? Bigger maybe.
[15:07] <SpeedEvil> Anyway - look up the HSE's limit on helium concentration at work
[15:07] <SpeedEvil> ...
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[15:13] <SAIDias> hody
[15:13] Nick change: SAIDias -> W0OTM
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[15:26] <fsphil> afternoon W0OTM
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[15:32] <W0OTM> hi fsphil
[15:33] <jcoxon> afternoon
[15:33] <Zuph> Morning
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[15:43] <jcoxon> what sort of flights do people want to be tracking?
[15:43] <jcoxon> would people be interested in long duration flights around hte UK
[15:44] <Upu> sounds good to me
[15:44] <jcoxon> been slightly reinspired by the recent floater flight
[15:45] <Upu> basically just use Hwoyee and under inflate it no need for holes :)
[15:45] <jcoxon> nah thats not going to give you long duration
[15:45] <jcoxon> you need it to float lower
[15:45] <jcoxon> if you float say at 23km you'll go for ages
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[15:51] <Dan-K2VOL1> I would be interested in seeing more superpressure experiments jcoxon ;-)
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[15:56] <jcoxon> Dan-K2VOL1, well - i've got my picoatlas lasting 10hrs
[15:56] <jcoxon> just not the whole night
[15:56] <Darkside> 10 hours on what battery?
[15:56] <jcoxon> 85mA
[15:56] <jcoxon> and a solar panel
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[16:06] <Dan-K2VOL1> is that an actual flight or just power duration jcoxon?
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[16:07] <jcoxon> Dan-K2VOL1, thats just having it sit outside
[16:09] <jcoxon> i want it to survive the night - even just beaconing rather than gps
[16:09] <Dan-K2VOL1> yeah
[16:09] <jcoxon> as its a bit useless if we manage to get float and then it runs out of battery
[16:10] <Dan-K2VOL1> well, lol I think the float is going to be harder to accomplish than the power
[16:10] <jcoxon> haha but to get it low enough in mass i've had to make quite a few sacrifices
[16:12] <Dan-K2VOL1> true
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[16:13] <jcoxon> and i've been thinking about an idea someone mentioned previously
[16:13] <jcoxon> if i can get it to 30g
[16:14] <jcoxon> we could use 2 balloons
[16:14] <jcoxon> and if we linked the 2 balloons with tubing we could equalise the pressure in the flight
[16:14] <Dan-K2VOL1> Since amateur superpressure has been so unsuccessful in the few attempts at it, I think we'll start with flying only two wireless pressure sensors, no payload. One inside balloon and one outside. That way you can perfect your math for transitioning to float, which is where most of them fail
[16:15] <Dan-K2VOL1> hmm sounds like a good plan, the multi-balloon thing I think isn't feasible unless they have a burst pressure much higher than their standard operating pressure
[16:15] <jcoxon> exactly
[16:15] <Dan-K2VOL1> unless you equalize like you said
[16:15] <jcoxon> thats whats failed each time
[16:15] <jcoxon> we lose one balloon and then descend
[16:15] <Dan-K2VOL1> yeah
[16:16] <fsphil> only one balloon will burst even if they're equalised
[16:16] <fsphil> though it'll fall faster
[16:16] <jcoxon> the problem is filling the balloons equally
[16:16] <Dan-K2VOL1> yeah
[16:17] <fsphil> yea connecting them makes filling a *lot* simpler
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[16:17] <jcoxon> they'll be one balloon that'll be overfilled and burst first
[16:17] <jcoxon> also you could mathematically treat a linked dual ballloon setup as 1 balloon
[16:18] <Dan-K2VOL1> definitely
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[16:19] <fsphil> would there be any advantage do doing that with two latex balloons? better float potential?
[16:20] <jcoxon> super-pressure would be difficult
[16:20] <Dan-K2VOL1> hmm, well, yeah I suppose better float, but they'd be more likely to burst from chafing
[16:21] <fsphil> right, they're quite grippy
[16:22] <SamSilver> jcoxon: if you put your 30g payload on an under filled Kaymont 3000 what would the flight profile look like ... float?
[16:22] <Dan-K2VOL1> yeah you can't superpressure without a rigid envelope. However you could put a latex balloon in a nylon bag
[16:22] <jcoxon> SamSilver, yeah probably
[16:23] <jcoxon> depends on the ascent rate
[16:23] <jcoxon> if its too fast then it'll burst
[16:23] <SamSilver> real slow
[16:23] <jcoxon> then yeah
[16:23] <SamSilver> yip
[16:23] <fsphil> Dan-K2VOL1, that's a good idea
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[16:24] <Dan-K2VOL1> anyone like sewing?
[16:24] <Dan-K2VOL1> I wonder if there's a 3D sewing pattern CAD program
[16:24] <Dan-K2VOL1> :-P
[16:24] <jcoxon> its certainly not easy :-)
[16:24] <jcoxon> i've got 6x36" balloons
[16:25] <Dan-K2VOL1> no, I've fought with a sewing machine once to try to build a parachute, and I won't do it again. I ended up with a bobbin tangle I couldn't undo and no parachute!
[16:25] <Dan-K2VOL1> spherachutes are spherical!
[16:26] <Dan-K2VOL1> you could simply sew two together!
[16:26] <Dan-K2VOL1> (from spherachutes.com
[16:27] <jcoxon> :-)
[16:30] <fsphil> get a really big pillow
[16:30] <Dan-K2VOL1> heh
[16:41] <Upu> final part for my launch the pilot : http://ava.upuaut.net/files/avanaught.jpg
[16:41] <Upu> had to go in my parents loft to get that
[16:42] <Dan-K2VOL1> haha looks great
[16:42] <Dan-K2VOL1> email sent to spherachutes regarding custom sphere!
[16:43] <Upu> they did me a pink one
[16:49] <jcoxon> hmmm seems my 85mA lipo has died
[16:50] <Dan-K2VOL1> :(
[16:50] <jcoxon> as in dead dead
[16:50] <jcoxon> i think something is wrong with the internal circuitry
[16:51] <Dan-K2VOL1> at least it's not dead splattered lithium all over
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[16:53] <Zuph> Dan-K2VOL1: Do you have the artwork from Becki for our poster?
[16:54] <Dan-K2VOL1> no, but she's online if you want to get it
[16:54] <Zuph> rgr
[16:55] <jkominar> so is the point of a super-pressure flight just to keep it from bursting so it travels farther?
[16:56] <Zuph> Well, keep it from bursting or losing helium so it maintains a constant altitude for a long period of time.
[16:56] <Zuph> Keep it from expanding in volume, really
[16:56] <Zuph> Constant volume = steady altitude.
[16:57] <SpeedEvil> Assuming no weather
[16:57] <Zuph> Weather Smeather
[16:57] <jkominar> So you not usually care about recovery on those types of flights? I'd assume the winds carry them much further the longer they stay up
[16:58] <Zuph> Not so much. The goal is a super long flight.
[16:58] <Dan-K2VOL1> the main benefit that 'super' pressure gives you is that the temperature swing from sunrise/set does not change your altitude at all. If it does, you didn't have enough superpressure.
[16:58] <Zuph> Long duration/Long Distanct ballooning is really the most unexplored area of Amateur HAB.
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[16:59] <Dan-K2VOL1> talking 1-3psi (75-200 mb) pressure differential
[17:00] <Zuph> (Or less, if you're good, or have a big envelope)
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[17:03] <SamSilver> I am thinking duvet cover around a 3000g kaymont
[17:04] <SamSilver> EUREKA!!!! I GOT IT!!! A 1600G COVERED WITH DUCT-TAPE!! HUH? HUH?
[17:05] <SamSilver> DUCT-TAPE RULES!
[17:05] <SamSilver> lol
[17:06] Nick change: ombot -> 64MAAWYME
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[17:11] <Dan-K2VOL1> lol
[17:12] <Dan-K2VOL1> do it SamSilver!
[17:12] <Dan-K2VOL1> A duvet cover, that's an easy one, I like that
[17:12] <Dan-K2VOL1> Fly the satin skies eh?
[17:17] <SamSilver> lets not get kinky dan
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[17:18] <Dan-K2VOL1> heh
[17:19] <priyesh> what values would i need to replicate this setup for 5v instead of 3v3: http://pastie.org/private/fdci6z1uarbulygstmir3w (it's for an NTX2 btw)
[17:21] <Darkside> don't use 5v?
[17:21] <priyesh> Darkside: we're using 3v3, but the person testing it only has 5v at the moment
[17:21] <Darkside> priyesh: work it out, it's an elementary voltage divider problem
[17:22] <priyesh> we worked out 124k and 148.5k
[17:22] <priyesh> but not sure if it'soaky
[17:22] <priyesh> * okay
[17:22] <Darkside> 12K and 15K maybe?
[17:22] <Darkside> you can tune the NTX2 a bit too
[17:22] <Darkside> theres 2 pots under the sticker, one controls output frequency, one controls modulation (and lets you adjust the shift)
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[17:28] <Darkside> hmmmmm
[17:28] <Darkside> considering going into bath to get dinner
[17:28] <Darkside> since all the stuff at the uni closes early :<
[17:29] <Darkside> i went and got a frozen lazagna to cook tonight, but theres no cutlery around
[17:29] <Darkside> and now the shops are closed...
[17:29] <Dan-K2VOL1> oh no, I hate that Darkside
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[17:37] <fsphil> no tesco nearby?
[17:38] <Darkside> not in the uni
[17:38] <Darkside> i think i'll go into the city
[17:38] <Darkside> since i have like 2 houts more light
[17:39] <Darkside> also WTF do you guys do with all your 1 and 2p coins
[17:39] <Darkside> they seem useless
[17:40] <LazyLeopard> Use them as magnet-keepers?
[17:41] <Darkside> lol
[17:41] <Darkside> but wtf
[17:41] <Darkside> the tuppence coin is BIG
[17:41] <LazyLeopard> Yeah, they're a waste of pocket space these days.
[17:41] <Darkside> in australia we only go down to 5c
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[17:41] <Darkside> fuuuck, i have way tyoo much shrapnel on me
[17:42] <Darkside> i've been using notes mostly, since i'm not used to the currency yet
[17:42] <Darkside> so i've been accumulating change
[17:42] <LazyLeopard> My guess is they'll go out of circulation soonish...
[17:42] <Darkside> >23 pounds in change
[17:42] <LazyLeopard> !
[17:42] <Dan-K2VOL1> Darkside that's why I like cards
[17:43] <Darkside> decus et tutamen
[17:43] <Darkside> ookay
[17:43] <LazyLeopard> How's your latin?
[17:43] <Darkside> also a two pound coin lets you stand on the shoulders of giants
[17:43] <LazyLeopard> ;)
[17:43] <Darkside> an ornament and a safeguard
[17:43] <Darkside> (google knows all)
[17:43] <LazyLeopard> Heh
[17:44] <LazyLeopard> How many fake pound coins have you got, though?
[17:45] <Darkside> >_>
[17:45] <Darkside> wut
[17:45] <fsphil> lol
[17:46] <Darkside> A Royal Mint survey in January 2009 estimated that 2.58% of all £1 coins in circulation are counterfeit.
[17:46] <Darkside> !!!!!!!!!!
[17:46] <LazyLeopard> I figure round here it's about 1 in 20...
[17:47] <Darkside> i am investigating
[17:47] <LazyLeopard> Usual give away is the quality of the "DECUS ET TUTAMEN"
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[17:49] <Darkside> i think i have one
[17:49] <Darkside> it might just be worn though
[17:50] <LazyLeopard> Sometimes you can tell they've been cast rather than stamped, and often the heads and tails aren't lined up.
[17:51] <Darkside> maybe i'm just lucky
[17:51] <Darkside> i think all mine are legit
[17:52] <LazyLeopard> Coin-operated vending machines are usually fooled by them. I think the density of them is higher in and around London.
[17:52] <Darkside> well most of the ones i have are from london
[17:52] <Darkside> i inherited a pile of coinage from my sister-in-law who was in london recently
[17:52] <LazyLeopard> Hmmm...
[17:53] <Darkside> but still
[17:53] <Darkside> 2.5%!!!!!!
[17:53] <Darkside> thats a SHITLOAD
[17:53] <LazyLeopard> Yep.
[17:54] <Upu> http://habhub.org/predict/#!/uuid=7c2b143d327a945d7036c64b1555a0cc0b3d1001 take that for Sunday :)
[17:54] <Upu> just no damn notam yet
[17:54] <fsphil> *drool*
[17:54] <Upu> he's getting a mail tommorrow
[17:54] <Darkside> niiiiice
[17:55] <Darkside> i wonder how much it'd cost me to get a train up there :P
[17:55] <LazyLeopard> There are also pound coins from other parts of the world which aren't strictly legal tender in the UK.
[17:55] <Upu> you can get the "megabus" from london for about £7
[17:55] <Upu> however personally I'd wlak
[17:55] <Upu> walk
[17:55] <Darkside> Upu: ...
[17:55] <Upu> yeah
[17:55] <Darkside> lol, cheapest fare is 98 pounds
[17:56] <fsphil> cheaper to fly
[17:56] <Upu> yeah
[17:56] <fsphil> sheesh
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[17:56] <LazyLeopard> Good luck with the NOTAM
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[17:57] <NigeyS> meh no picochu launch this weekend :(
[17:57] <fsphil> I've applied for the beginning september - suspect I'm being optimistic with that one :)
[17:59] <fsphil> things go boom NigeyS?
[17:59] <NigeyS> nah, been roped into going away for the weekend
[18:01] <Darkside> NigeyS: awwww
[18:01] <NigeyS> should be fine for the weekend after though :D
[18:01] <Darkside> do you guys have any weight under which you can launch anytime?
[18:01] <Darkside> in australia if its <50g you can launch whenever
[18:01] <NigeyS> if its under 2m
[18:02] <Darkside> 2m?
[18:02] <NigeyS> dont know of any weight limit
[18:02] <NigeyS> the size limit is 2M though
[18:02] <Darkside> what do you mean 2m
[18:02] <Darkside> maximum balloon diameter?
[18:02] <NigeyS> yups
[18:02] <Darkside> OOOOH
[18:02] <Darkside> NICE
[18:02] <NigeyS> cant exceed 2m in any direction
[18:02] <Darkside> party balloons
[18:02] <Darkside> i could easily launch my payload under some party balloons lol
[18:03] <NigeyS> yups, i dont need a notam for picochu cause its just under 2m :D
[18:03] <fsphil> it's the year of little payloads
[18:03] <Darkside> haha
[18:03] <Darkside> fsphil: i'll get onto NanoNut once i'm done with this sat payload
[18:03] <NigeyS> thats what picochu is Darkside .. but foil party balloons...lol
[18:04] <Darkside> fsphil: go pirate Altium Designer so we can collaborate
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[18:06] <fsphil> lol
[18:06] <fsphil> I haven't even learned eagle yet
[18:06] <Darkside> good
[18:06] <Darkside> learn altium instead
[18:06] <Darkside> its far better
[18:07] <Dan-K2VOL1> and how much is it Darkside
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[18:08] <Darkside> Dan-K2VOL1: far far better
[18:08] <Darkside> then again i've never learnt eagle properly
[18:08] <Darkside> and i'm incredibly biased
[18:08] <fsphil> Travelodge: "Important Information: data is null"
[18:08] <fsphil> bah
[18:08] <Darkside> still, altium is a proper integrated design tool
[18:08] <Darkside> and i love it to bits
[18:09] <fsphil> can it use the eagle libraries, or do you have to make your own parts?
[18:10] <Darkside> you can't use eagle libraries, no
[18:10] <Darkside> theres LOTS of libraries that come with it tho
[18:10] <Darkside> creating parts is really easy though
[18:10] <Darkside> the IPC-Compliant footprint wizard is awesome
[18:11] <Darkside> i can't really explain it that well, i'd have to show you
[18:11] <Darkside> and thats a bit hard to do :P
[18:11] <Darkside> got skype?
[18:11] <Dan-K2VOL1> darkside how much does it cost
[18:11] <Darkside> Dan-K2VOL1: a LOT
[18:11] <Darkside> which is why i either use my uni's license, buy a student license, or pirate it
[18:12] <Dan-K2VOL1> ah so not really an option for individuals
[18:12] <Darkside> Dan-K2VOL1: its used by the industry a LOT
[18:12] <Darkside> particularly in australia
[18:12] <Dan-K2VOL1> that's cool for industry
[18:12] <Darkside> the key point is its a massively integrated design system. for FPGA based design is the only way to go
[18:12] <Darkside> Dan-K2VOL1: sadly, most of the good tools cost lots of money
[18:13] <Dan-K2VOL1> it is frustrating
[18:13] <Darkside> again, why i pirate it
[18:13] <Dan-K2VOL1> heh
[18:13] <Darkside> teh manufacturers won't know the difference, i just send them gerbers
[18:14] <Dan-K2VOL1> good to know about, may think about getting it for the office
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[18:15] <Darkside> mm
[18:15] <Darkside> i love the interactive 3d editing stuff
[18:15] <Darkside> in the board i'm working on now, thats quite important
[18:16] <Upu> http://habhub.org/predict/#!/uuid=7c2b143d327a945d7036c64b1555a0cc0b3d1001
[18:18] <fsphil> still plenty of time for that to change Upu
[18:18] <Upu> yup
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[18:30] <Darkside> ok i think i might go into bath and take a wander around the city
[18:30] <Darkside> it looks beautiful
[18:30] <Darkside> lol sunset is at 21:16...
[18:31] <Darkside> i find that hillarious
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[18:32] <Darkside> anyway, will leave laptop here. back in an hour or so!
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[18:32] <NigeyS> have fun Darkside :)
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[18:40] <chris_99> are you launching on friday then Upu
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[18:49] <Dan-K2VOL1> have you guys been following the @flightdata99 twitter account?
[18:49] <Dan-K2VOL1> it's an automated APRS balloon launch detector
[18:50] <jkominar> huh .. that's cool
[18:51] <jkominar> wonder if mine will show up on saturday .. will have to follow them.
[18:51] <Dan-K2VOL1> it will
[18:51] <Dan-K2VOL1> there's been a lot of launches from Germany that I never hear about anywhere else
[18:52] <jkominar> I wonder how it knows though ... the call signs it's tracking aren't all using the proper -11 suffix, so how would it know how to tell the APRS traffic's source?
[18:52] <Dan-K2VOL1> it uses altitude
[18:52] <Dan-K2VOL1> and vertical velocity
[18:52] <jkominar> ah .. tricky!
[19:18] <fsphil> seen some chatter about that on the gpsl list
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[19:20] <Lunar_Lander> hello
[19:23] <fsphil> hihihi
[19:24] <Dan-K2VOL1> hi Lunar_Lander, sorry I was so off and on last night
[19:25] <Lunar_Lander> NP
[19:25] <Lunar_Lander> how are you?
[19:28] <Dan-K2VOL1> doing fine, you?
[19:29] <Lunar_Lander> same here
[19:29] <Lunar_Lander> what are you up to?
[19:31] <Darkside> you have very big seagulls in the uk.
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[19:31] <Upu> chris_99 no sunday
[19:34] <chris_99> aha cool, i'll listen out for it then
[19:35] <fsphil> Darkside, well fed
[19:35] <fsphil> saw a starling at the beech once, it was round - was amazed it could fly
[19:36] <number10> hi guys anyone got a ling to a reasonably lon trry 50 sound file so I can look at fldigi?
[19:36] <number10> link
[19:36] <number10> i should learn to type rtty
[19:36] <fsphil> long rtty 50 baud? :)
[19:36] <number10> yes lol i cant type
[19:37] <fsphil> all my samples are quite weak so probably not the best to test with
[19:37] <fsphil> there's a short one on the wiki
[19:37] <Lunar_Lander> Dan-K2VOL1?
[19:37] <fsphil> what are you looking to test?
[19:38] <number10> testing my understanding of the program really no much more
[19:38] <number10> I downloaded a sample of icurus flight and only managed decode of one line
[19:38] <number10> the frequency shifted quite quickly
[19:38] <fsphil> http://www.sanslogic.co.uk/hab/samples/
[19:38] <fsphil> it does that
[19:39] <fsphil> if you have AFC enabled it should track it
[19:39] <number10> doecheers I'll try that
[19:39] <fsphil> those samples will be tricky
[19:39] <fsphil> if you can decode them you'll be fine :)
[19:39] <number10> well thanks anyway - gives me something to play with!
[19:41] <mattltm> Hi all :)
[19:41] <fsphil> matticus!
[19:41] <Lunar_Lander> hi mattltm
[19:44] <mattltm> Hi fsphil, Lunar_Lander :)
[19:48] <Lunar_Lander> how are you?
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[19:48] <mattltm> Good thanks Lunar_Lander :0
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[19:53] <rjharrison> thanks for the qso Upu
[19:55] <Upu> no problems rjharrison
[19:55] <Upu> Your missus made my missus lol
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[19:58] <Darkside> ok, back
[19:58] <Darkside> mega pissed that i missed the organ recital today
[19:58] <Darkside> at the bath abbey
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[20:03] <Dan-K2VOL1> hey Lunar_Lander
[20:03] <Lunar_Lander> yes Dan-K2VOL1
[20:03] <Dan-K2VOL1> what's up
[20:04] <Lunar_Lander> did you find out about the sensors yet?
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[20:12] <Darkside> oh wow
[20:12] <Darkside> bath abbey has a full choir
[20:13] <Darkside> i might go along to a service
[20:13] <Darkside> (note: i am an atheist)
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[20:17] <Dan-K2VOL1> Lunar_Lander I can't find the reference to getting it calibrated, but here's the datasheet: http://media.digikey.com/pdf/Data%20Sheets/Sharp%20PDFs/GP2Y1010AU0F.pdf
[20:18] <Lunar_Lander> OK thanks
[20:24] <Laurenceb_> http://stallmanfacts.com/all
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[20:32] <Darkside> hmm
[20:32] <Darkside> who was doing the OSX dl-fldigi builds?
[20:33] <fsphil> jcoxon does those
[20:34] <Lunar_Lander> Dan-K2VOL1?
[20:35] <Darkside> fsphil: ahh
[20:35] <Darkside> fsphil: got skype? i could show you how altiumd esigner works:P
[20:36] <fsphil> I don't have
[20:36] <Darkside> awww
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[20:39] <Dan-K2VOL1> here
[20:39] <Dan-K2VOL1> this day is going by like molases
[20:41] <Lunar_Lander> yea
[20:41] <Lunar_Lander> what will you do if SB-1 makes it to Europe?
[20:42] <Dan-K2VOL1> I will dance a jig
[20:42] <Zuph> I will drink. Heavily.
[20:42] <Dan-K2VOL1> :-p we will let it continue on if it's not heading toward any major cities
[20:42] <Dan-K2VOL1> probably sell SpeedBall-2 to the highest bidder :-P
[20:43] <Dan-K2VOL1> \\
[20:43] <Dan-K2VOL1> \
[20:43] Last message repeated 3 time(s).
[20:43] <jcoxon> Zuph, youll drink heavily if it doesn't make it too
[20:43] <mattltm> $10?
[20:43] <Dan-K2VOL1> whoops sorry, cleaning keyboard
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[20:43] <Lunar_Lander> xD
[20:43] <Lunar_Lander> so, if it succeeds
[20:43] <Dan-K2VOL1> that's 10 right there, do we 20? 20?
[20:44] <Lunar_Lander> will you send more balloons?
[20:44] <Zuph> jcoxon: Maybe speedball is just an excuse to fuel my alcoholism.
[20:44] <Dan-K2VOL1> perhaps yes, we'll start working on super pressure, we'd like to do a global circumnavigation
[20:44] <Lunar_Lander> yeah
[20:44] <Lunar_Lander> and more sensors
[20:44] <Lunar_Lander> :)
[20:45] <jcoxon> always teh risk
[20:45] <Dan-K2VOL1> it would be nice for this long duration stuff to be easier, it takes so much work that you can barely reap any benefit out of it
[20:45] <jcoxon> alcohol ballast?
[20:45] <Dan-K2VOL1> science-wise
[20:45] <Zuph> I'll raise my glass with the rest of #highaltitude. I hear you English can drink.
[20:46] <Lunar_Lander> yeah xD
[20:46] <Dan-K2VOL1> we've started putting our sloppy software online finally at https://github.com/whitestarballoon
[20:47] <Zuph> Only look at flight computer software if you hate yourself.
[20:48] <Dan-K2VOL1> I'd like to see this type of long duration flight get nailed down to a cheap DIY kit so it can be used for science.
[20:48] <Lunar_Lander> yeah
[20:48] <Lunar_Lander> we need more sensors Dan-K2VOL1 Zuph
[20:48] <Dan-K2VOL1> ha well, the comm controller isn't even functional!
[20:49] <Dan-K2VOL1> Lunar_Lander yes, that's what the DIY kits would be for - other people to put sensors on a proven platform
[20:49] <Lunar_Lander> yeah
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[20:49] <Lunar_Lander> hi RocketBoy
[20:49] <Dan-K2VOL1> I think once we get one balloon across we'll probably throw in the towel for the SpeedBall series, it's extremely exhausting
[20:50] <Lunar_Lander> yea
[20:51] <Zuph> Dan-K2VOL1: We should come up with a methodology for ballooning that doesn't involve killing ourselves :-p
[20:52] <RocketBoy> anyone have a clue why the CUSF daily runs is predicting fliighs out of northampton rather than cambridge? http://www.srcf.ucam.org/~cuspaceflight/hourly-predictions/
[20:53] <Dan-K2VOL1> ha yes zuph
[20:53] <jcoxon> there is a reason that no one else is really competing with you guys
[20:55] <Dan-K2VOL1> it's not that hard of a concept, we just need to nail down the variables so there's less rigorous testing and qualifying that needs to go on during design
[20:55] <jcoxon> need to be more suicidal
[20:55] <Dan-K2VOL1> haha
[20:56] <Dan-K2VOL1> we've thrown enough money away into R&D on the ground trying not to throw money into atlantic that I wonder if it would have been more satisfying to test less and watch more flights :-P
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[20:56] <Dan-K2VOL1> zuph did you see the convo earlier about the nylon bag superpressure balloon?
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[20:57] <Lunar_Lander> nylon SP?
[20:58] <Zuph> Dan-K2VOL1: I think so.
[20:58] <Dan-K2VOL1> nylon for strength with a gas liner inside, latex to start, but eventually mylar
[20:58] <Zuph> You're emailing spherachutes?
[20:58] <Dan-K2VOL1> yeah
[20:58] <Dan-K2VOL1> they make such nice spherical nylon
[20:58] <Lunar_Lander> cool
[20:59] <Zuph> Yeah. What was the volume we estimated before?
[21:00] <Dan-K2VOL1> can't recall, I just asked them for a quote for mating two 48" chutes at the equators
[21:00] <Dan-K2VOL1> to get a ballpark
[21:01] <Dan-K2VOL1> put a latex envelope in it, swish some hy-float into it, and I suspect you could get a 48 hour float
[21:01] <Lunar_Lander> sounds good
[21:02] <Zuph> That will provide ~950 grams of lift at sea level.
[21:02] <Lunar_Lander> yeah
[21:02] <Lunar_Lander> what balloon do you want to use?
[21:02] <Lunar_Lander> I mean which size
[21:03] <Zuph> Alright, off to the hackerspace
[21:03] <Dan-K2VOL1> see u there
[21:04] <Dan-K2VOL1> Lunar_Lander, not sure, maybe a 300g?
[21:04] <Lunar_Lander> ah ok
[21:04] <Lunar_Lander> sounds good :)
[21:04] <Darkside> oh man
[21:04] <Dan-K2VOL1> toss a little padded payload inside the balloon and voila, a floating beachball!
[21:04] <Darkside> i need to find someone who'll take me through the box mine
[21:05] <Dan-K2VOL1> ok, ttyl all
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[21:52] <griffonbot> Received email: pete edwards "[UKHAS] Churchill college launch site"
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[22:08] <Lunar_Lander> and how is it going fsphil?
[22:08] <fsphil> busily :) good - and you?
[22:09] <Lunar_Lander> well
[22:09] <Lunar_Lander> I just found a video
[22:09] <Lunar_Lander> "Geek Group Space Program Series Opener"
[22:09] <Lunar_Lander> and it's ashaming
[22:10] <Lunar_Lander> there is one man explaining ARHAB
[22:10] <Lunar_Lander> and a second man laughing all the time and joking about how they never fly on a NASA ship
[22:10] <Lunar_Lander> can you imagine that?
[22:10] <Darkside> :<
[22:11] <Lunar_Lander> phew
[22:11] <fsphil> odd
[22:11] <Lunar_Lander> blue shirt man calmed down
[22:11] <Lunar_Lander> now they discuss an Arduino Uno
[22:13] <Lunar_Lander> btw
[22:13] <Lunar_Lander> what happens if you hit the arduino RESET?
[22:13] <Lunar_Lander> will that clear the chip?
[22:14] <fsphil> starts the program from the beginning
[22:14] <fsphil> avr goes back to the same state as when it's just turned on
[22:15] <Lunar_Lander> ah ok
[22:17] <Lunar_Lander> thanks
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[22:40] <griffonbot> Received email: Fergus Noble "Fwd: [UKHAS] Churchill college launch site"
[22:43] <Zuph> Hibby: Culture shock died down yet? :-P
[22:43] <Darkside> culture shock?
[22:43] <Hibby> I got given a guide on how to deal with it.
[22:43] <Zuph> Amerikkka
[22:44] <Darkside> lol
[22:44] <Lunar_Lander> fsphil LOL
[22:44] <Hibby> Told me about the 7 stages or whatever it was
[22:44] <Lunar_Lander> in that video, they have a sticker
[22:44] <Darkside> what are they?
[22:44] <Lunar_Lander> "Body Piercing by Ruger"
[22:45] <Hibby> Dunno
[22:45] <Hibby> Lost my guide
[22:45] <Zuph> Heh, we've got the redneck-est gun range this side of the Mason-Dixon here in Louisville :-p
[22:46] <Zuph> http://www.knobcreekrange.com/
[22:47] <Lunar_Lander> xD
[22:48] <Zuph> They love fereners, long as ya ain't brown.
[22:48] <Lunar_Lander> yea
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[23:00] <Lunar_Lander> ROFL!
[23:01] <Lunar_Lander> the one guy just smelled at the PCB and said "I like the smell that is to it"
[23:01] <Lunar_Lander> XD
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[23:03] <Lunar_Lander> LOL
[23:03] <Lunar_Lander> "Speaking of spending a ton of money, where is the damn Laser?"
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[00:00] --- Wed Jul 20 2011