highaltitude.log.20070401

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[17:08] <icez> hey jcoxon
[17:30] <jcoxon> hey icez
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[20:56] <edwardmoore> hi all
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[20:58] <edwardmoore> hi jcoxon
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[22:06] <jcoxon> hey edwardmoore
[22:06] <jcoxon> wonder how the glider went
[22:06] <edwardmoore> ello
[22:06] <edwardmoore> same
[22:07] <jcoxon> need to get myself a radio
[22:07] <jcoxon> though really can't afford one right now
[22:07] <edwardmoore> i can't afford anything atm
[22:08] <edwardmoore> i have this bizarre paralysis where if i only have money for one thing but need 2, i get neither
[22:08] <jcoxon> strange
[22:08] <edwardmoore> how've you been?
[22:09] <jcoxon> i
[22:09] <jcoxon> oops
[22:09] <jcoxon> getting better
[22:09] <jcoxon> gonna take a while
[22:10] <jcoxon> started working on "Ground Control" software
[22:10] <edwardmoore> what exactly was it if u don't mind me asking?
[22:10] <jcoxon> had an abscess on my back
[22:10] <jcoxon> had to have it drained
[22:10] <jcoxon> not fun
[22:10] <edwardmoore> :s
[22:11] <edwardmoore> tell me more about the software
[22:12] <jcoxon> well at the moment it attempts to read a serial gps and show the data
[22:12] <jcoxon> to give us gps position for the ground control base
[22:12] <jcoxon> using cocoa and perl
[22:12] <edwardmoore> that yummy combination :)
[22:13] <jcoxon> however need to get my head around it a bit more to actually get it update properly
[22:13] <jcoxon> really couldn't be bothered with objective-c
[22:13] <jcoxon> found "camelbones" which is a nice framework
[22:13] <edwardmoore> i have nee idea about frameworks. but being able to make good software must be really liberating
[22:14] <jcoxon> :-)
[22:15] <jcoxon> so the plan is to start with a window that displays our gps data on the left and the payloads data on the right
[22:15] <jcoxon> to allow comparisons
[22:16] <edwardmoore> cool. would an output to a guided antenna be do-able?
[22:16] <jcoxon> yeah
[22:17] <jcoxon> once i've worked out how to get the data in we can then do all manner of things with it behind the scenes with easy to write perl scripts
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[22:17] <jcoxon> make use of the fork() option
[22:20] <jcoxon> plan to have things like a button that will open up google maps and display the 2 points
[22:20] <jcoxon> or update google earth
[22:24] <edwardmoore> we'd need net access for these wouldn't we
[22:25] <edwardmoore> i wonder how big the entire google earth image library is?
[22:30] <jcoxon> not necessarily
[22:30] <jcoxon> you can cache quite a large amount before hand
[22:31] <jcoxon> also the offline data gives enough info to visulise distances etc
[22:32] <edwardmoore> aye true
[22:33] <jcoxon> of course a bit of opengl programming - 3d representations of the flight :-D
[22:34] <jcoxon> i'll leave that up to you
[22:36] <edwardmoore> :p
[22:36] <edwardmoore> w/e
[22:39] <edwardmoore> 150TB of images, apparently
[22:39] <edwardmoore> i'd better get another external hdd
[22:42] <jcoxon> hehe\
[22:42] <jcoxon> we need to start thinking of doing some more parafoil stuff
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[22:46] <jcoxon> hey rocketboy
[22:46] <jcoxon> how did it go?
[22:47] <rocketboy> lost I'm afaid
[22:47] <jcoxon> oh no
[22:47] <rocketboy> lost radio contact
[22:48] <rocketboy> just suddenly went
[22:48] <rocketboy> so no idea if it worked orn not
[22:49] <rocketboy> searched around for a couple of hours
[22:49] <rocketboy> nothing heard/found
[22:49] <jcoxon> was this after cutdown?
[22:49] <jcoxon> was it gliding?
[22:50] <rocketboy> don't know - about then / no idea
[22:50] <jcoxon> oh well
[22:50] <jcoxon> ears good?
[22:51] <rocketboy> yeah - although I spent most of the time faffing with payloads / balloons
[22:51] <rocketboy> one V good K flight by Ben Jarvis
[22:52] <edwardmoore> Hi steve
[22:52] <edwardmoore> that's a bugger. suddenly just went?
[22:52] <rocketboy> hi ed
[22:52] <rocketboy> yep
[22:53] <edwardmoore> that's a shitter
[22:54] <rocketboy> yep - laurence is traveling back - I have just sent him the radio log
[22:55] <rocketboy> he seemed to take it well
[22:55] <edwardmoore> i have an old paint mixer/shaker we could use to test future payloads ;)
[22:55] <edwardmoore> lol
[22:56] <jcoxon> need a black box backup system
[22:56] <rocketboy> yeah - that would be good - if it survives that it'll sevive anything
[22:56] <rocketboy> also lost my radio transmitter :-(
[22:56] <edwardmoore> yeah. should point out any loose connections before they bite us in the bum
[22:57] <edwardmoore> could always put it next to a pair of speakers and play it Slayer too
[22:57] <edwardmoore> jcoxon, agreed x 3
[22:57] <edwardmoore> steve would running two antennas in parallel on two indentical independent systems do anything wierd?
[22:58] <rocketboy> I agree - actually we nee one of thoise for rocketry too
[22:59] <rocketboy> should be OK ed - as long as they wern't right up next to eachother ( at least a wavelength appart
[22:59] <edwardmoore> or (infact just like we already discussed) a dead simple gps > radio box
[23:00] <jcoxon> lets build one
[23:00] <edwardmoore> cool. one day i'll get it :) ... maybe
[23:00] <jcoxon> make it tubular so that it can be used in rockets
[23:01] <edwardmoore> well i can volunteer a rocket to test it on :)
[23:01] <rocketboy> yeah - and surviveable
[23:01] <jcoxon> run along really simple lines
[23:01] <jcoxon> even dumping NMEA direct?
[23:02] <edwardmoore> i was thinking that. could maybe run it through a pic for shaping though. unless that's unecessary
[23:02] <rocketboy> yeah - thats the way - my transmitter system will already do that
[23:02] <rocketboy> it just sends text lines - anthing upto a CR LF
[23:04] <jcoxon> so -
[23:04] <jcoxon> GPS --> rocketboy transmitter system
[23:04] <jcoxon> + batteries
[23:04] <rocketboy> so - all I need to finish it off is someone with access to PCB production
[23:05] <jcoxon> edwardmoore, could you do it through the nova account in engineering?
[23:05] <edwardmoore> can it be done through hole single sided?
[23:06] <rocketboy> possibly - its quite simple - surface mount
[23:06] <edwardmoore> well, don't spose it needs to be exclusively through hole, but if it can be done single sided then i can do it np
[23:06] <rocketboy> I'll check ou the layout - I expect that it could be made with those SMT link "resistors"
[23:07] <edwardmoore> i can do lots for free in that case
[23:08] <rocketboy> OK - I'll need to make some more anyway - might as well do a proper job
[23:09] <jcoxon> i'll buy one!
[23:09] <rocketboy> ah a market - excellent
[23:09] <edwardmoore> :)
[23:10] <jcoxon> hehe - though of course you should only need to buy one cause with it you'd always get your payload back :-p
[23:10] <rocketboy> I have some V small GPS antenna - about 12mm dia x 20mm long
[23:10] <rocketboy> active QFHA
[23:10] <rocketboy> ideal for a small tube
[23:11] <edwardmoore> what voltage can the thing run off?
[23:11] <rocketboy> all 3.3v (GPS, Ant, transmitter PIC)
[23:12] <edwardmoore> cool so the thing could run off its own Lipo
[23:12] <rocketboy> sure - ideal
[23:12] <edwardmoore> a true black box
[23:13] <rocketboy> could also add a serial output to drive other things
[23:13] <jcoxon> careful :-D
[23:13] <rocketboy> I think that is far enough
[23:13] <jcoxon> imho it should be as simple as poss
[23:13] <jcoxon> the main payload can do the other stuff
[23:13] <edwardmoore> lol. you're muddying james's puritanical waters :)
[23:13] <rocketboy> rather tham making someone ave to add another GPS
[23:14] <edwardmoore> you could always let something else tap into the output of the gps
[23:14] <rocketboy> I think thats pure enough - I'll add a buffer so that a short wont stop the unit working
[23:15] <jcoxon> okay
[23:15] Action: jcoxon will leave the serial output well alone :-D
[23:15] <edwardmoore> just a line-out from the gps>pic line. just like having a spare gps for the main payload
[23:15] <rocketboy> and perhaps the 1 second pulse ....
[23:16] <rocketboy> only kidding
[23:16] <edwardmoore> given it's hardly being stretched though, it could always calculate landing sites. i mean c'mon. got all those cycles going spare
[23:17] <rocketboy> - and a basic interpreter
[23:18] Action: jcoxon refrains from commenting
[23:18] <edwardmoore> yeah we could control the auxilliary servos from the interpreter
[23:19] <edwardmoore> 'high bang' could set off the cutdown
[23:19] <rocketboy> mumm yeah - I'll add some power mosfets
[23:20] <rocketboy> and a mobile phone inetrface
[23:20] <edwardmoore> which we could control over http because i reckon you could put a webserver on one
[23:20] <rocketboy> BTW - I got your launch lugs ed (inc 4" ones)
[23:21] <rocketboy> what about a JAVA engine
[23:21] <rocketboy> ah well - to much fun in an otherwise depressing day
[23:21] <rocketboy> I gott go cu guys
[23:22] <edwardmoore> ooooh thank you. so far we still have enough lines left over for a VGA output
[23:22] <edwardmoore> h'ok, cya soon
[23:22] <edwardmoore> thanks again for the lugs
[23:22] <rocketboy> email me you address and I'll put them in the post
[23:23] <rocketboy> cu
[23:23] <edwardmoore> willdo
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[23:40] <edwardmoore> ok, cya jcoxon
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[00:00] --- Mon Apr 2 2007