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[15:01] <phatmonkey> hi all, i need to get a parachute
[15:18] <phatmonkey> hmmmm
[15:19] <jcoxon> how big?
[15:19] <phatmonkey> i'm not sure
[15:20] <phatmonkey> i'm wondering how heavy the final glider is going to be
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[15:21] <phatmonkey> i guess it won't be more than 4 or 5 pounds
[15:21] <ehj> jcoxon: congrats :-)
[15:21] <jcoxon> hey ehj
[15:21] <jcoxon> thanks
[15:21] <phatmonkey> hi ehj!
[15:21] <ehj> (I was here about a month ago with nick ehj20)
[15:22] <jcoxon> yup
[15:22] <jcoxon> i remember
[15:22] <ehj> so it didn't crash on anyone's house then? :-p
[15:22] <jcoxon> nope
[15:22] <jcoxon> nearly though :-p
[15:22] <phatmonkey> nearly more than a house...
[15:23] <phatmonkey> http://www.the-rocketman.com/chutes.html
[15:23] <phatmonkey> apparently they are very tough chutes
[15:23] <phatmonkey> how strong is the one you got?
[15:23] <phatmonkey> and if it's going to be 4 or 5 pounds ish, would your chute be too small?
[15:24] <ehj> jcoxon: I can't work out how to compile gnokii for the gumstix. Did you do it through the 'menuconfig' system at all?
[15:24] <jcoxon> :-) gnokii is evil to compile
[15:24] <jcoxon> i manually did it
[15:24] <phatmonkey> gnokii is very hard to compile apparently, you have some binaries don't you james?
[15:24] <phatmonkey> mm
[15:24] <jcoxon> i have binaries :-D
[15:24] <ehj> jcoxon: I tried the gnokii binary on your site but it wouldn't run
[15:24] <phatmonkey> i need to pinch some too :D
[15:24] <jcoxon> oh thats old
[15:24] <jcoxon> give me 10 and i'll have them up
[15:25] <jcoxon> brb
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[15:34] <phatmonkey> hey
[15:35] <jcoxon> http://www.pegasushabproject.org.uk/pegasus3/software/gnokii
[15:36] <phatmonkey> lovely
[15:36] <ehj> if anyone is interested I've made a bash script to use gpsd to log gps data. It's a bit scrappy and suffers from the fact that gpsd doesn't always report altitude data, but there we are: http://www.edsplace.org.uk/zephyrus
[15:36] <phatmonkey> and i can guess i can just copy the standard gnokiirc file
[15:36] <phatmonkey> nice!
[15:37] <jcoxon> http://www.pegasushabproject.org.uk/pegasus3/software/gpsparser3
[15:37] <phatmonkey> maybe we should start adding code to the ukhas wiki...
[15:37] <phatmonkey> ouch, perl
[15:37] <jcoxon> ehj, its a modified perl script from defy
[15:37] <ehj> jcoxon: thanks, this is gold dust
[15:37] <jcoxon> it gets the altitude :-D
[15:37] <phatmonkey> you don't want to use perl for important stuff on something with such little memory
[15:37] <phatmonkey> it leaks memory like a, uh, very leaky thing
[15:38] <jcoxon> but gpsd is awful
[15:38] <phatmonkey> write a C script then!
[15:38] <phatmonkey> or use libgpsd actually
[15:38] <jcoxon> perl does the job nicely
[15:38] <phatmonkey> just be careful :D
[15:38] <jcoxon> got to use that 64mb somehow
[15:38] <phatmonkey> you could have nasty memory problems
[15:38] <jcoxon> or ram*
[15:38] <jcoxon> of*
[15:38] <jcoxon> damn typing
[15:38] <phatmonkey> i dunno how much memory microperl uses tho
[15:38] <phatmonkey> hehe, gg fingers
[15:39] <ehj> I'd love to be able to write C, but pretty much limited to stringing things together with bas :-)
[15:39] <ehj> bash
[15:39] <phatmonkey> good ol' bash scripting :D
[15:39] <jcoxon> hmmm those categories for the projects are a little rubbish
[15:40] <phatmonkey> yeah, i just copied the ones from the old wiki
[15:40] <jcoxon> i know :-D
[15:40] <phatmonkey> hehe
[15:40] <phatmonkey> shall i add a big ass code page to the ukhas wiki?
[15:40] <phatmonkey> we can start dumping code
[15:40] <phatmonkey> i'm sure a lot of the stuff we write would be useful to other people
[15:41] <phatmonkey> like some of our libraries, and your gps scripts
[15:41] <jcoxon> yeah - just be careful about gpl etc
[15:41] <phatmonkey> shall we release everything under the gpl?
[15:42] <jcoxon> up to people
[15:42] <phatmonkey> yep, ok
[15:42] <jcoxon> so like my gpsparser isn't mine really
[15:42] <jcoxon> its defy's
[15:42] <phatmonkey> yeah
[15:45] <phatmonkey> yay, docwiki has source colouring
[15:48] <ehj> jcoxon: you've mentioned about large file sizes causing problems if the gumstix isn't shutdown properly, does this problem affect files on the mmc card as well?
[15:49] <ehj> (as far as you know, of course?)
[15:49] <jcoxon> ummm i think defy had some issues
[15:49] <jcoxon> but i'm really not sure
[15:49] <jcoxon> i can't see it having a problem
[15:49] <jcoxon> what file system is your mmc card formated as?
[15:50] <ehj> fair enough. I'm sure I'll do some testing at some point anyway.
[15:50] <ehj> Ummm, not sure. Don't have access to it right now
[15:51] <phatmonkey> format it as ext2/3 and you'll have no problems!
[15:52] <jcoxon> defy will know more
[15:52] <phatmonkey> erm, i assume the gumstix kernel can read ext3
[15:52] <phatmonkey> easy to recompile though, so not a problem
[15:53] <ehj> phatmonkey: ext2 certainly sounds a good idea
[15:53] <phatmonkey> ext3 is probably best what with dodgy power connections
[15:53] <jcoxon> ehj, hows the project going?
[15:53] <ehj> Yes, I was just thinking that!
[15:53] <ehj> slowly!
[15:54] <jcoxon> what are the plans?
[15:54] <phatmonkey> http://wiki.ukhas.org.uk/code
[15:54] <ehj> Not got any launch date in mind. I'll just keep plugging at each step until I'm done. Working on the gps/gumstix/gsm components at the moment
[15:55] <phatmonkey> you going the pegasus style route then?
[15:55] <ehj> Frankly though I'm concerned about the gsm reception up in yorkshire
[15:55] <ehj> phatmonkey: yes
[15:55] <phatmonkey> look into this 434mhz radio, apparently it works well!
[15:55] <ehj> phatmonkey: seems simple and relatively cheap
[15:56] <phatmonkey> can't wait to see developments on that, i really need to buy some gear of my own
[15:56] <phatmonkey> i must have a long chat with steve about it sometime, what i need to get, how to do it and whatnot
[15:56] <jcoxon> i'm still thinking that you need both phone and radio
[15:56] <jcoxon> as you do lose signal on the ground
[15:56] <jcoxon> especially if the payload is the correct way up
[15:56] <ehj> the phone is great because you don't need to chase and be able to keep up
[15:56] <phatmonkey> hokay jcoxon, crazy question. i am using up all the serial ports available to me - how do i attach the radio?
[15:57] <phatmonkey> i suppose i could use a tweener or something
[15:57] <phatmonkey> to get to... ttyS3 or S1 or whatever it is
[15:57] <jcoxon> isn't hte tweener just ffuart
[15:57] <jcoxon> phatmonkey, it depends what you want from your radio
[15:57] <jcoxon> a gpio might be sufficent
[15:58] <jcoxon> for morse code
[15:58] <phatmonkey> i'll be transferring quite a bit of data, a serial port is probably necessary
[16:02] Nick change: ehj -> ehj-away
[16:03] <jcoxon> i'm not sure using hte tweener is the best way
[16:09] <phatmonkey> hmm
[16:17] <phatmonkey> what is the best way then/
[16:17] <phatmonkey> i don't really want a tweener i suppose, it is a tad big
[16:21] <phatmonkey> i could use one of the robostix serial ports... somehow
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[20:30] <rocketboy> bbl
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[23:25] <jcoxon> phew, finally finished stripping pegasus III down
[23:26] <phatmonkey> nice
[23:26] <phatmonkey> everything intact?
[23:26] <jcoxon> yup
[23:26] <phatmonkey> wonderful
[23:26] <jcoxon> i've even unsoldered the wires
[23:26] <jcoxon> off the gumstix
[23:27] <jcoxon> though i need a sucker for a few to get the solder out
[23:27] <phatmonkey> i've got everything ready and together now for an uncontrolled launch
[23:27] <jcoxon> oh wow
[23:27] <phatmonkey> i wouldn't do one without a radio though
[23:27] <jcoxon> you can always borrow my 434 beacon
[23:27] <phatmonkey> it would be a *real* bummer to lose everything now
[23:27] <phatmonkey> nah, i'd rather work on the glider :D
[23:28] <defy--> phatmonkey are you using any type of RC controller to take over the servos if need be?
[23:28] <phatmonkey> for testing, yes
[23:28] <defy--> I haven't been able to figure out the best way of switching from auto pilot to controller easily
[23:28] <phatmonkey> for the real thing, we can have simple manual control over the radio link
[23:28] <defy--> i'd love to just be able to flick a servo switch
[23:28] <phatmonkey> hokay, i've been in touch with a company who's making exactly the thing you need
[23:29] <phatmonkey> it switches between two servo inputs using a servo input as a switch
[23:29] <defy--> yea? something that just moved pwm from one cable to another
[23:29] <phatmonkey> so you can hook it up to an R/C tranny, and use a switch (channel) on there to switch between them
[23:29] <defy--> ah, yea thats exactly what i'm after, how many channel?
[23:29] <phatmonkey> 4
[23:29] <phatmonkey> they said it would be ready by the end of this month
[23:29] <defy--> cool, are you using something similar?
[23:30] <phatmonkey> ... and it's nearing hte end of this month!
[23:30] <phatmonkey> i will buy it, yeah
[23:30] <phatmonkey> i'll send you a link when they've done it
[23:30] <phatmonkey> they said they would mail me
[23:30] <defy--> awesome
[23:30] <defy--> cheers
[23:30] <phatmonkey> it's the only thing that's holding up the project now
[23:30] <phatmonkey> apart from the thermopiles, aargghh
[23:30] <defy--> even if it flys back within 100 feet of launch, bad things can still happen, heh
[23:31] <phatmonkey> yeah
[23:31] <phatmonkey> well i'm just going to fly back to the launch site then release a parachute
[23:31] <phatmonkey> pretty bad coding friendly :D
[23:31] <defy--> cool
[23:31] <phatmonkey> i could always take over manual control via the radio if i wanted a spectacular finish...
[23:32] <phatmonkey> 300 baud is masses for manual control, it's great!
[23:32] <phatmonkey> i hope we can get that sort of bandwidth
[23:32] <defy--> just having the option there is nice, but its _needed_ for testing
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[23:32] <defy--> yeah? how much range?
[23:32] <phatmonkey> it would be rather nice controlling it back manually from up there if things go wrong
[23:32] <phatmonkey> yeah
[23:32] <phatmonkey> ask rocketboy
[23:32] <phatmonkey> 100km apparently!
[23:33] <phatmonkey> jcoxon, when are you going to africa?
[23:33] <defy--> ah control from all the way up, hehe
[23:33] <phatmonkey> when will you be back launching balloons and things?
[23:33] <phatmonkey> would certainly be possible! we'll have a heading, artificial horizon and position on the ground station :D
[23:34] <defy--> deifnately
[23:34] <jcoxon> i'll be in niger a week today
[23:34] <jcoxon> and back on the 8th August
[23:34] <phatmonkey> ok, cool
[23:34] <phatmonkey> will you have net access?
[23:35] <jcoxon> i'll be on the "tinternet" during that period
[23:35] <jcoxon> yup
[23:35] <phatmonkey> awesome
[23:35] <phatmonkey> i'm sure i'll need help :D
[23:35] <jcoxon> apparently they've got broadband
[23:35] <phatmonkey> i think now is the time to get a parachute actually
[23:35] <jcoxon> though with all the power cuts it'll be interesting
[23:35] <phatmonkey> then i can start developing a release
[23:35] <phatmonkey> ouch, yes
[23:35] <jcoxon> and the heat :-p
[23:36] <phatmonkey> how many balloons are you launching?
[23:36] <phatmonkey> what sort of stuff is on them?
[23:36] <jcoxon> well there are 5 launches in the campaign i think
[23:36] <jcoxon> which is 6 weeks long
[23:36] <jcoxon> so i should get in about 2
[23:36] <jcoxon> about 50kg payloads
[23:36] <phatmonkey> woah!
[23:37] <phatmonkey> niiice
[23:37] <jcoxon> we are launching gas chromatograms
[23:37] <phatmonkey> that's one big glider :D
[23:37] <phatmonkey> we should send up a full sized glider...
[23:37] <defy--> haha
[23:37] <phatmonkey> no, ok, i should stop witht he insane ideas
[23:37] <jcoxon> http://www.atm.ch.cam.ac.uk/%7Ehalocarbon/
[23:37] <phatmonkey> knowing me i'd go ahead and do it
[23:37] <defy--> phatmonkey will you go up with it?
[23:38] <phatmonkey> ah cool
[23:38] <phatmonkey> yes :D
[23:38] <jcoxon> sorry thats gas chromatograph
[23:38] <defy--> hehe
[23:38] <phatmonkey> wow, big balloons
[23:38] <jcoxon> oh yeah
[23:38] <phatmonkey> bloody massive
[23:38] <jcoxon> the guys who work their are amazing
[23:39] <jcoxon> engineering wise
[23:39] <jcoxon> phatmonkey, yeah i'll grab a few
[23:39] <phatmonkey> make sure you send up a really good camera :)
[23:39] <phatmonkey> we want some pics :D
[23:39] <phatmonkey> how high do they go?
[23:41] <jcoxon> umm they vary
[23:41] <jcoxon> up to 100,000ft
[23:41] <jcoxon> but with very control ascent and descent
[23:41] <jcoxon> i'm going camera shopping tomorrow
[23:41] <jcoxon> going to look around in shops to get a feel for the cameras
[23:41] <jcoxon> see if they are easily hacked up
[23:42] <jcoxon> i'm worried about power etc
[23:42] <phatmonkey> yeah
[23:42] <jcoxon> and also the fact that i really haven't got long to get a payload ready!
[23:42] <jcoxon> (thats if i'm allowed to launch though - cnes haven't agreed yet)
[23:42] <jcoxon> http://ballon.cnes.fr:8180/ballon_gb.htm
[23:42] <phatmonkey> ah i see
[23:42] <phatmonkey> http://www.atm.ch.cam.ac.uk/%7Ehalocarbon/gap/field2.JPG
[23:42] <phatmonkey> wow!
[23:43] <phatmonkey> oh cool
[23:44] <jcoxon> :-D hehe i'm working with a space agency - how cool am i!
[23:45] <phatmonkey> quite intensely cool
[23:45] <phatmonkey> we need to make UKASA - uk amateur space angency :D
[23:45] <defy--> haha thats awesome
[23:45] <jcoxon> http://www.atm.ch.cam.ac.uk/%7Ehalocarbon/hibiscus/bauru-04/upagumtree.jpg
[23:45] <jcoxon> how about that parachute phatmonkey
[23:45] <phatmonkey> :o
[23:46] <phatmonkey> me wantee
[23:46] <phatmonkey> i'm really excited about all these ideas of sending up rockets
[23:46] <phatmonkey> sounds incredible if we're actually going to do it
[23:46] <jcoxon> we can't do it in the uk
[23:46] <phatmonkey> yeah
[23:47] <phatmonkey> imho, the sea is silly
[23:47] <phatmonkey> it'll be so hard to make it watertight
[23:48] <jcoxon> maybe http://en.wikipedia.org/wiki/Esrange
[23:49] <phatmonkey> yeah
[23:49] <jcoxon> i'll see what i can find out in africa
[23:50] <jcoxon> andrew (one of the guys at atmos. chem) has literally launched everywhere
[23:50] <jcoxon> http://www.rocketrange.no/arr/index.html
[23:50] <phatmonkey> ok
[23:52] <jcoxon> Andøya i reckon is the sort of place to do it
[23:52] <phatmonkey> yes
[23:53] <jcoxon> they are doing a student rocket right now
[23:54] <phatmonkey> wow, incredible rockets
[23:55] <jcoxon> will require some thought
[23:56] <jcoxon> best now focus on getting enough experience to be in a position to even consider rockoons
[23:56] <jcoxon> and on that note i'm off to bed
[23:56] <jcoxon> night all
[23:57] <phatmonkey> night!
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[00:00] --- Wed Jul 19 2006