highaltitude.log.20060721

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[15:57] <jcoxon> hey all
[16:08] <icez> hey
[16:19] <jcoxon> oooo its hot
[16:19] <jcoxon> making myself a fan out of a cpu fan
[16:19] <icez> :|
[16:20] <icez> getting hot everywhere in the world
[16:20] <icez> not even 9am and it's like 33C
[16:23] <Tiger^> yeah, 32C here
[16:23] <icez> global warming is among us!
[16:23] <icez> :]
[16:23] <Tiger^> it doesn't drop below 21 even at night
[16:23] <Tiger^> yup
[16:24] <icez> then it's gonna be amazingly cold winters:)
[16:28] <jcoxon> hey shadowing, welcome to #highaltitude
[16:30] <icez> getting more and more people:)
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[16:30] <jcoxon> yup :)
[16:32] <jcoxon> hehe i complain about the heat here and on tues i'm off to one of the hottest countries in the world
[16:32] <icez> oh really
[16:32] <icez> which one is that?
[16:33] <jcoxon> niger
[16:33] <icez> what are you going for? fun?
[16:34] <jcoxon> balloons!
[16:34] <jcoxon> i'm going on an expedition
[16:35] <jcoxon> with a load of universities and CNES and launching some balloons to study the west african monsoon
[16:35] <icez> oh cool
[16:35] <icez> some you made yourself?
[16:35] <icez> or in a group..
[16:35] <jcoxon> oh i'm only helping
[16:35] <icez> ok
[16:35] <jcoxon> these are the professionals
[16:36] <jcoxon> but i might be able to tack peg IV on
[16:36] <icez> maybe they'll teach you something:)
[16:36] <jcoxon> hehe
[16:37] <icez> a few months ago we had a weather balloon from New Mexico stuck in some sort of Vortex here in arizona at ~90000 m
[16:37] <icez> some people thought it was a UFO:)
[16:37] <jcoxon> :)
[16:38] <icez> it stayed there a long time too
[16:38] <shadowing> Hi there
[16:39] <shadowing> jcoxon, are you the guy from pegasus mission ?
[16:39] <jcoxon> yup
[16:39] <shadowing> cool I was looking for you
[16:39] <icez> everyone is :
[16:39] <icez> :)
[16:39] <shadowing> sure
[16:39] <shadowing> on this channel ;)
[16:40] <shadowing> I'm working in remote sensing and I'm interesting in your project
[16:40] <jcoxon> okay, cool
[16:40] <jcoxon> remote sensing in what way?
[16:40] <shadowing> airborne remote sensing
[16:40] <jcoxon> (i assume a gumstix is involved)
[16:40] <jcoxon> oh right
[16:40] <shadowing> not yet
[16:41] <shadowing> I'm working with the new generation of bathymetric airborne lidar
[16:41] <shadowing> from Optech
[16:41] <shadowing> the SHOALS_3000T
[16:41] <icez> oh you're in canada?
[16:41] <shadowing> yup !
[16:41] <shadowing> Québec
[16:41] <icez> aaah
[16:41] <icez> francais?
[16:41] <icez> :)
[16:41] <shadowing> city
[16:42] <shadowing> et oui
[16:42] <shadowing> so we are merging different data sets in order to establish maps
[16:42] <icez> i was from there for 15 years, but it seems your company works with people in my new city too;)
[16:42] <shadowing> humm
[16:43] <shadowing> were are you from
[16:43] <icez> i'm in arizona now
[16:43] <shadowing> ok
[16:44] Action: jcoxon has now checked out the SHOALS_3000T
[16:45] <jcoxon> right so how can i help?
[16:46] <shadowing> I have an emergency, I'll be back in 20 minutes
[16:46] <shadowing> sorry
[16:46] <jcoxon> no probs
[16:46] <shadowing> don't leave..... please
[16:46] <jcoxon> i won't
[16:46] <jcoxon> hehe :-D
[16:47] <icez> could try to put one of those SHOALS on your next project jcoxon\
[16:47] <icez> ;p
[16:47] <jcoxon> ooo that would be cool
[16:52] <jcoxon> would need a big ballon to lift a shoals! the sensor is 77kg
[16:57] <icez> :|
[17:02] <jcoxon> be back in litterally one minute
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[17:13] <shadowing> nope
[17:13] <shadowing> that's note my point
[17:13] <jcoxon> :-) we know
[17:14] <shadowing> my point is to lift another remote sensing probe (camera, hyperspectral camera or else...)
[17:14] <jcoxon> okay
[17:14] <shadowing> with a ballon... and being able to stay quite stable and over the same zone
[17:15] <jcoxon> right
[17:15] <jcoxon> at what sort of altitude?
[17:15] <shadowing> 400 m
[17:15] <shadowing> 1000 km max
[17:15] <shadowing> if you go higher your resolution become coarse
[17:15] <jcoxon> so between 400 and 1000m? (i assume you don't mean 1000km)
[17:16] <shadowing> and I'm looking for high resolution (30cm by pixel !)
[17:16] <shadowing> yep sorry
[17:16] <shadowing> mistapping
[17:16] <jcoxon> okay
[17:16] <shadowing> the whole stuff linked with an IMU
[17:17] <shadowing> and DGPS or RTK
[17:17] <shadowing> for precise correction of the images
[17:17] <shadowing> this should be the first step, mount a basic camera linked with an IMA and a DGPS
[17:17] <jcoxon> right
[17:18] <jcoxon> at that sort of height the balloon could be tethered
[17:18] <shadowing> the second one is to create a stuff for stationnary flight at low altitude
[17:18] <shadowing> and this should be the tricky part
[17:19] <jcoxon> the weather would have to be pretty good (little wind)
[17:19] <shadowing> yup
[17:19] <jcoxon> and some sort of propulsion would be required
[17:19] <jcoxon> but it is certainly possible
[17:20] <shadowing> could it be possible to join your project (or share idears...) to craete the camera-gumstix-IMU module ?
[17:20] <jcoxon> of course
[17:20] <shadowing> with the GPS
[17:20] <shadowing> is your project a educational purpose or is it pure hobby ?
[17:20] <jcoxon> well it began as a hobby
[17:20] <jcoxon> but its becoming educational
[17:20] <shadowing> ok
[17:21] <jcoxon> though i'm not actually an engineer
[17:21] <jcoxon> but for example on tuesday i'm off to niger for 2 weeks to launch with CNES
[17:21] <shadowing> cause this would be for my PhD studies
[17:21] <shadowing> great !
[17:21] <jcoxon> http://en.wikipedia.org/wiki/CNES
[17:21] <shadowing> ok, sorry again but lunch time
[17:21] <shadowing> I'll be back
[17:21] <jcoxon> their balloon section
[17:21] <jcoxon> okay if i'm not around drop me an email
[17:22] <shadowing> sure definithly
[17:22] <shadowing> this coulb be really cool !
[17:22] <jcoxon> :-D
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[17:42] <icez> does anyone know a weather service that gives temps from different places in the world (like...major places) in one "file" or something similar?
[17:42] <icez> *stress on _one_* :P
[17:43] <jcoxon> not that i can think of
[17:43] <icez> i want to do something but without having to fetch 100s of location :P
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[18:17] <icez> hello phatmonkey, rocketboy
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[18:45] <shadowing> Hi again, I'm back !
[19:01] <phatmonkey> hi!
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[19:41] <rocketboy> bbl
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[23:17] <phatmonkey> hiyall!
[23:18] <defy> hey :)
[23:21] <phatmonkey> sigh, i'm getting a couple of thermopile boards from that site, my homebrew one failed miserably!
[23:24] <jcoxon> hey all
[23:28] <defy> are you getting the kits? or put together?
[23:29] <defy> mine took a couple of weeks to get, I think it was because he put off putting them together for a while :P kits would probably be faster
[23:35] <jcoxon> defy, how are the projects going?
[23:38] <defy> pretty good, I bought an rc heli a few days ago so thats been distracting me quite a bit...but I should have my waypoint/2d nav system in the water next week
[23:38] <jcoxon> and the gumstix is being intergrated with the heli?
[23:38] <jcoxon> :-)
[23:38] <defy> haha, i dont know if ill want to go that far
[23:39] <defy> a plane is one thing, but helis are so touchy..and this thing is micro, it can only lft about 30g..just enough for video :P
[23:40] <jcoxon> I'm tempted to get a basix and a robostix for playing with
[23:40] <jcoxon> but need to earn some money before that
[23:40] <defy> the robostix is quite cool
[23:42] <jcoxon> i have a remote control car that is itching to be autonomous
[23:42] <defy> hehe
[23:43] <jcoxon> also i reckon i'll learn some important things from it
[23:44] <defy> I've made my boat mold, which ill fiber glass this weekend...but I'm thinking i've made it too small for the engine and prop i have, its going to be a little torpedo
[23:49] <phatmonkey> nice stuff
[23:49] <phatmonkey> yeah, i'm getting the kits because i already have the thermopiles and amplifiers
[23:49] <phatmonkey> i've been ill over the past few days, so not much progress on the code :(
[23:50] <phatmonkey> but it's really just a matter of adding the i2c-io code for servos, rewriting the thermopile code (already done half of it), adding the data logger and just cleaning up the last little bits
[23:50] <phatmonkey> should probably be done by the time the thermopiles arrive anyway
[23:51] <phatmonkey> and transferring data down the radio is going to be simple, we can use the slug on the ground
[23:52] <phatmonkey> the slug and the gumstix both are little endian ARM processors, so all the data that's being kicked around processes (floats especially) can be read without any complex conversion on the slug
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[23:53] <defy> sweet
[23:53] <defy> are you using a robostix?
[23:54] <defy> the i2c-io stuff is so simple, and there is a bash script out on the mailing list called 'servo', funnily enough...which makes controller servos from the gumstix command line _very_ easy
[23:54] <phatmonkey> non-realtime IPC is done on the gumstix with a TCP server that just repeats everything back to other processes, so anything that's sent up the radio link can be dumped on there. essentially we have near complete control of everything over the radio
[23:54] <phatmonkey> yep!
[23:54] <phatmonkey> i'm using i2c-io-api, a lovely C library for it
[23:54] <defy> sweet
[23:55] <phatmonkey> you know, we really should be swapping code and developing this together!
[23:55] <phatmonkey> we have identical hardwarte
[23:55] <defy> i cheat though, I write all my apps in perl and run them on the gumstix side :P
[23:56] <defy> its dirty i know, but it means i can develope quickly on the gumstix, and I'm not all that good with C
[23:56] <phatmonkey> yeah, we were originally going to use perl or python or something, but they both use up far too much memory
[23:56] <defy> my gps parser is online if you're using the gpsstix (or any nmea gps for that matter)
[23:56] <phatmonkey> a single fork would basically use up all the memory
[23:56] <phatmonkey> what do you mean on the gumstix side?
[23:57] <phatmonkey> ah yes
[23:57] <defy> well all my control code is on the gumstix rather than the robostix
[23:57] <defy> all i put on the robostix is i2c-io, and i control everything over the i2c
[23:57] <phatmonkey> yes, same
[23:57] <defy> sweet
[23:58] <phatmonkey> http://wiki.ukhas.org.uk/code - you could put that bash script on there
[23:58] <phatmonkey> I might start adding more code
[23:58] <defy> with my gpsparser, waypoint engine, attitude logger, and log rotater, the gumstix barely uses half the ram it has
[23:58] <phatmonkey> watch out with perl though, it uses almost 30mb of memory without anything loaded
[23:58] <defy> most of my ram/cpu goes to reading the i2c over and over again
[23:58] <phatmonkey> ah really, what is perl out of them?
[23:58] <defy> phatmonkey its microperl, it uses very little
[23:59] <phatmonkey> good point
[23:59] <defy> and i've never seen perl use 30mb by default :P
[23:59] <phatmonkey> how much memory does it use?
[23:59] <defy> or do you mean of disk space?
[00:00] --- Sat Jul 22 2006