highaltitude.log.20110618

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[00:16] <simhed> finally..! got arduino + ntx2 + lassen iq + dl-fldigi working
[00:16] Action: simhed jumps
[00:23] <SpeedEvil> :)
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[00:31] <griffonbot> Received email: Michael Matthes "[UKHAS] Newsletter Ballonprojekt HAM-Radio 2011"
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[07:36] <Darkside> uh oh, balloon launch on today
[07:36] <Darkside> can someone remove my data from the tracker?
[07:42] <Upu> morning Darkside
[07:43] <Darkside> he Upu
[07:43] <Upu> I can't do it but someone who can should be about shortly
[07:43] <Upu> this the launch in the US ?
[07:43] <Darkside> i'm going a runtime test for mininut, just realised it was appearing on the tracker :P
[07:43] <Darkside> nah, UK
[07:43] <Upu> oh where you launching from ?
[07:43] <Darkside> i'm not launching
[07:43] <Darkside> someone else it
[07:43] <Upu> ah sorry
[07:43] <Darkside> is*
[07:43] <Upu> rgr
[07:52] <fsphil> uk launch?
[07:52] <Darkside> looks like it
[07:52] <Darkside> KF4ZTI
[07:53] <fsphil> "Kentucky Lake, TN"
[07:53] <Darkside> ahh
[07:54] <Darkside> so the balloon on there isnt theirs
[07:54] <Darkside> and CDT is US CDT
[07:54] <fsphil> that's aeros - not sure who's running that
[07:55] <fsphil> "KF4ZTI on 433.92 MHz AM modulation" .. well I don't think I've much hope with that one :)
[07:57] <Darkside> Am modulation huh?
[07:57] <Darkside> interesting
[07:58] <fsphil> indeed, an unusual choice
[07:58] <fsphil> the modules are cheaper -- though not dramatically so
[08:00] <Darkside> hmmm
[08:00] <Darkside> both sparkfun and littlebird are out of stock of the ublox gps modules
[08:00] <Darkside> seeedstudio has nothing either
[08:01] <Darkside> so where else can i get a uBlox gps module?
[08:04] <fsphil> sequoia have 1 fsa03 left
[08:04] <Darkside> i don't want an FSA03
[08:04] <Darkside> i want a separate GPS module
[08:06] <Darkside> MiniNut just has a pin header for a gps module, i can attach whatever i want to it
[08:06] <Darkside> but an FSA03 will just be fiddly to deal with - i'd have to make another PCB for it
[08:08] <fsphil> I'm not too fond of soldering the fsa03 either
[08:08] <Darkside> i'm a bit of a fan of the http://www.sparkfun.com/products/9566 modules
[08:09] <Darkside> it was one of those modules that ended up in the drink on horus 8
[08:09] <Darkside> and it survived
[08:09] <Darkside> and flew on another flight, before it got launched into a powerline on a rocket
[08:09] <Darkside> not sure where it is now...
[08:09] <fsphil> fiddly plug though
[08:09] <Darkside> nah
[08:09] <Darkside> you get the cable and its easiy to deal with
[08:10] <Darkside> hang on, imgur'ing a pic
[08:11] <Darkside> http://i.imgur.com/87wGS.jpg
[08:11] <juxta> disclaimer: fsa03 survived a swim in the ocean too
[08:11] <juxta> ;p
[08:11] <Darkside> :P
[08:11] <Darkside> yeah yeah
[08:12] <Darkside> FSA03 didn't survive a drop onto concrete though
[08:14] <Darkside> juxta: speaking of GPS modules, how about i give you a mininut board and we call it even :P
[08:15] <juxta> i was hoping to order a few fsa03's soon
[08:15] <juxta> ping jonsowman
[08:15] <Darkside> mnerrrrrr
[08:15] <jonsowman> pong juxta
[08:15] <Darkside> fuck the FSA03s...
[08:15] <Darkside> get something else
[08:15] <juxta> ah jonsowman :-)
[08:15] <Darkside> maybe i could make a PCB to break one out onto a pin-header
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[08:20] <Darkside> maybe i could make some breakout boards for some uBlox 6 modules
[08:21] <Darkside> hmm at $100 each maybe not...
[08:28] <jonsowman> anyone had uIP running on an AVR?
[08:28] <jonsowman> bit of a long shot
[08:43] <fsphil> I thought about it, if that counts? :)
[08:43] <Darkside> uIP?
[08:44] <Darkside> oh
[08:44] <Darkside> ip stack
[08:44] <jonsowman> yeah
[08:44] <jonsowman> I've got an ENC28J60 and it won't bring the ethernet link up for some reason
[08:45] <Darkside> oh man
[08:46] <Darkside> uIPv6
[08:46] <Darkside> totally need to get that running on an AVR
[08:46] <jonsowman> hehe
[08:46] <jonsowman> it's pushing it running it on an atmega168
[08:46] <Darkside> atmega328?
[08:46] <jonsowman> yeah should have gone for that really
[08:47] <jonsowman> the extra 1k flash would be pretty useful
[08:47] <jonsowman> uh, RAM
[08:47] <jonsowman> nevertheless uIP should run on the 168
[08:48] <jonsowman> I can't really figure out if this is a software (i.e. uIP) thing or a hardware thing
[08:49] <jonsowman> the phy is meant to be responsible for link management, and the enc28j60 phy is just reporting "link down" :\
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[11:19] <griffonbot> Received email: Hannah Price "[UKHAS] Launch location"
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[12:26] <Darkside> i wonderr how far off the US guys are with their launch
[12:26] <Darkside> theres nothing on the tracker
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[12:37] <N4MSJ> KF4ZTI isn't scheduled to launch for another 25 minutes or so (8:00am Central Daylight Time), and these things often come off late.
[12:38] <Darkside> ok
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[12:39] <fsphil> Bill time -- and it's not even bill launching
[12:40] <fsphil> some thing happens my launches
[12:40] <fsphil> same
[12:40] <fsphil> don't think I've launched on time yet
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[12:42] <N4MSJ> Yeah, I count on Bill Time since I seldom even get to the launch site in time for the scheduled launch time!
[12:44] <Darkside> mm, we never launch on time either, heh
[12:44] <Darkside> usually 1/2 ur to 1hr late
[12:45] <N4MSJ> So far my station is the only one I see on spacenear.us. And it's entirely possible I'm too far away (134 mi) to receive the 433.92 sig, although Bill is only a mile away and he heard K4ZTI's flight last year.
[12:46] <N4MSJ> Oops, that should be KF4ZTI's flight last year.
[12:47] <N4MSJ> Hopefully they have a ground station at the launch site, maybe with one of the two chase cars I see on the map.
[12:49] <fsphil> 430mhz signals can often be picked up over silly ranges - up to 560km, though those where SSB and this is AM
[12:49] <fsphil> that will probably reduce range a bit
[12:52] <Darkside> mm
[12:52] <Darkside> interesting experiment though
[12:52] <Darkside> but i'd still fly a known payload
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[13:01] <Darkside> aha
[13:02] <Darkside> balloon is on tracker
[13:06] <mattltm> IS anyone here a JS expert?
[13:08] <mattltm> Guess not :(
[13:10] <fsphil> fire away anyway :)
[13:11] <fsphil> btw any kml experts too? I made a kml file of the hadie:3 flight, but when I load it into google earth it puts it near new zealand
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[13:11] <fsphil> I'd remember if I launched there
[13:13] <Darkside> bahaha
[13:13] <Darkside> inverted signs?
[13:14] <fsphil> ah, geography fail -- it's near africa not new zealand :)
[13:14] <fsphil> looks like
[13:14] <fsphil> but it's normal, 54.646456,-7.035065
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[13:28] <fsphil> okie I inverted the coordinates and now it's in French Guiana
[13:29] <SpeedEvil> 54 north, -7 east
[13:30] <SpeedEvil> I think french guyana is about 54 east -7 north
[13:30] <fsphil> oooh they're backwards
[13:32] <N4MSJ> Ireland
[13:33] <NigelMoby> Lols
[13:36] <fsphil> all backwards here mate
[13:36] <fsphil> hmm.. is there a nifty linux command line app for swapping coordinates
[13:37] <fsphil> sed can probably do it
[13:38] <Darkside> i'd just do it in python lol
[13:38] <NigelMoby> Aye try sed
[13:38] <Darkside> import csv
[13:38] <Darkside> read it into an array, swap columns, and write out again
[13:39] <SpeedEvil> awk
[13:39] <SpeedEvil> awk '{print $2,$1}'
[13:40] <fsphil> sweet SpeedEvil
[13:41] <fsphil> -6.805233 55.011758 355 -- it's removing the comma on output
[13:43] <SamSilver> try moving africa
[13:44] <fsphil> tried that once, but a bit broke off. I think they called it Madagascar
[13:45] <SpeedEvil> comma is syntactical
[13:45] <SpeedEvil> print $2","$1
[13:45] <SpeedEvil> If you want a literal comma
[13:45] <fsphil> aaaah
[13:45] <fsphil> nice one, thanks!
[13:46] <SpeedEvil> awk is really simple - it reads lines - then tests to see if that line matches each rule in turn, and if it does, executes it.
[13:47] <SpeedEvil> So awk '/fish/{print $4}' will print the fourth field of any line with fish in it.
[13:49] <SamSilver> bbl
[13:49] <griffonbot> Received email: Steve Randall "[UKHAS] Launch location"
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[14:20] <cuddykid> is styrofoam extruded or expanded polystyrene? Or neither?!
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[14:35] <N4MSJ> Cuddykid: See http://en.wikipedia.org/wiki/Polystyrene#Forms_produced
[14:36] <cuddykid> thanks
[14:38] <cuddykid> anyone know where I could buy styrofoam? as wickes etc seem to only sell standard polystyrene
[14:41] <N4MSJ> Try hobby shops where they sell model railroad supplies or building materials suppliers (Home Depot or Lowes) where the 'Pink Stuff' is sold for thermal insulation.
[14:46] <Darkside> hmm
[14:46] <Darkside> so ar they launching?
[14:46] <mixio> Finally, flight system completely ready: http://imagebin.org/158903, http://imagebin.org/158904
[14:47] <Upu> nice mixio
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[14:47] <Upu> alt of things dangling out :) You going to secure those ?
[14:48] <Upu> very modular
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[14:49] <mixio> yes, all components are modular
[14:49] <mixio> only caps res and crystal are fixed
[14:49] <mixio> though i was planning to solder a crystal socket
[14:50] <Upu> looks nice my only concern would be stuff falling out if it gets rough
[14:50] <mixio> and have crystal modular too
[14:50] <mixio> Upu I will make some crash tests
[14:50] <mixio> and if something is wrong i will put duct tape on them
[14:51] <Upu> lol
[14:51] <Upu> if in doubt - duct tape
[14:51] <Upu> anyone got URL to how to tie the balloon off ?
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[14:53] <m1x10> now i have all tronics ready
[14:53] <m1x10> time to do the payload
[14:53] <m1x10> :)
[14:53] <Upu> making your own ?
[14:53] <m1x10> i really dont know what i want
[14:54] <Upu> you can make a really nice flexable one with a hot wire cutter
[14:54] <Upu> I say flexible as I've changed my mind so many times with it
[14:55] <Darkside> m1x10: breakout board galore
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[14:55] <Darkside> :P
[14:55] <m1x10> haha
[14:55] <m1x10> i dont have money to buy another Darkside
[14:55] <m1x10> so breakouts everywhere
[14:55] <m1x10> :P
[14:56] <Darkside> what'll happen on landing?
[14:56] <Darkside> gonna hot-glue it all down?
[14:56] <m1x10> they dont move
[14:56] <Darkside> have you dropped it from 5m to test that?
[14:56] <m1x10> they are firmly placed in the headers
[14:56] <m1x10> NO :)
[14:56] <m1x10> propably Ill duct tape everything
[14:56] <Darkside> well its gonna hit the ground at about 5m/s
[14:56] <Darkside> heh
[14:57] <m1x10> its gonna hit water
[14:57] <m1x10> not ground
[14:57] <m1x10> :P
[14:57] <Darkside> are you planning on getting it back?
[14:57] <Upu> lol
[14:57] <m1x10> of course man
[14:57] <Darkside> heh
[14:57] <m1x10> it costs so much
[14:57] <m1x10> :(
[14:57] <Darkside> yeah, my boards are about $60 each
[14:57] <m1x10> greek scientists got no money to spare :p
[14:58] <Darkside> $60 + GPS module (which i use on different payloads)
[14:58] <Darkside> i need to get more GPS modules tho...
[14:58] <cuddykid> N4MSJ: will have a search around the stores! :)
[14:59] <m1x10> upu
[14:59] <Upu> yeah
[15:00] <m1x10> do u buy custom payloads from somewhere?
[15:00] <Upu> hell no I made my own
[15:00] <m1x10> tools?
[15:00] <Darkside> hmm, i could make $$ selling mine :P
[15:00] <Darkside> i should make a rule: only sell to people overseas
[15:00] <m1x10> stirofoam and glues?
[15:00] <m1x10> any store?
[15:00] <Upu> nichrome wire, some bits of wood and an old 12v PSU
[15:00] <Upu> https://picasaweb.google.com/upuaut/201009AVAPayloadConstruction
[15:01] <Upu> Uhu Por
[15:01] <Darkside> m1x10: a few places sell foam boxes
[15:01] <cuddykid> m1x10: I'm using a polystyrene box that is used for keeping fish cool! haha then extra poly for added insulation
[15:01] <Upu> http://cgi.ebay.co.uk/UHU-POR-Depron-Glue-40g-50ml-1-x-Depron-Glue-/250531686912?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item3a54da2a00
[15:01] <Darkside> cuddykid: why the extra insulation?
[15:01] <Upu> I wanted to ensure nothing moved inside
[15:01] <Darkside> padding, yes, but tbh most parts we'd use will handle -40 deg c
[15:01] <Upu> so I partitioned it all off
[15:01] <Upu> https://picasaweb.google.com/upuaut/201009AVAPayloadConstruction#5520396753563172706
[15:02] <cuddykid> Darkside: not that thick so thought I would give it a little extra
[15:02] <m1x10> my payload needs to have some legs that dont sink in the water
[15:02] <m1x10> so there is a distance between water and actual payload
[15:02] <Upu> https://picasaweb.google.com/upuaut/201009AVAPayloadConstruction#5520396722632523842 I used 2 hot wire cutters one was a wire suspended across 2 10mm bolts to get the notches
[15:03] <Upu> the other was just a traditional wire on a frame job
[15:04] <m1x10> omg what is wire cutter?
[15:04] <m1x10> i need to learn things
[15:04] <Upu> http://ava.upuaut.net/?p=63
[15:05] <Upu> http://ava.upuaut.net/wp-content/uploads/2010/09/IMG_4820.jpg for the pic
[15:05] <Upu> nothing complex just 2 bits of wood with a bolt and some weights to keep the wire tight
[15:05] <Upu> you need nichrome wire
[15:06] <m1x10> damn u got whole lab there
[15:06] <Upu> hah thats just me bench :)
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[15:09] <m1x10> i have 31C in room
[15:10] <m1x10> whats your payloads size upu?
[15:10] <SpeedEvil> You don't need nichrome.
[15:10] <SpeedEvil> Steel works just fine.
[15:11] <Upu> I couldn't get steel working
[15:11] <Upu> about 8" x 8"
[15:11] <Upu> maybe a little more
[15:11] <Upu> 850g all loaded
[15:12] <SpeedEvil> http://www.mauve.plus.com/Chinese-Lantern.jpg
[15:12] <SpeedEvil> Was cut with steel.
[15:12] <SpeedEvil> Well - to be strictly accurate - the foam form for the bottom half was.
[15:12] <SpeedEvil> Make up a foam block of the requisite size.
[15:13] <SpeedEvil> Then cut 'm' shaped cutouts of the two x and y axis, going all the way through
[15:13] <SpeedEvil> then a big 'n' over that.
[15:13] <SpeedEvil> Dissasemble mould, remove core.
[15:13] <SpeedEvil> Cast concrete into reassembled mould.
[15:14] <SpeedEvil> When mostly set, whittle with a file.
[15:15] <SpeedEvil> Was cut with a wire from some SWA cable
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[16:31] <eroomde> what's happening?
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[16:37] <SpeedEvil> Little.
[16:39] <Darkside> nfi what happened to the launch that was meant to be on
[16:42] <eroomde> ho hum
[16:42] <eroomde> i made spag bol for 8 then drank enough with it that i passed out in that saterday-afternoon kind of a way
[16:43] <eroomde> just woken up expecting it to be 3pm, to find that 's nearly 6
[16:44] <Darkside> lol
[16:44] <Darkside> well its 2am here...
[16:45] <eroomde> perfect time to pass out from drink
[16:53] <Darkside> mm
[16:53] <Darkside> night
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[17:59] <SpeedEvil> fsphil: Do you happen to have a link to description of your sstv project?
[18:01] <fsphil> closest I've got is this SpeedEvil: http://ukhas.org.uk/guides:ssdv , and the source code on github
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[18:26] <mixio> hi free people
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[19:08] <griffonbot> Received email: Steve Randall "[UKHAS] Launch location"
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[19:29] <SamSilver> g'night all
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[19:39] <eroomde> greetings Dan-K2VOL
[19:40] <Dan-K2VOL> Hi Ed
[19:40] <Dan-K2VOL> How's your evening
[19:40] <eroomde> not bad, though not really started
[19:40] <Dan-K2VOL> Oh got plans?
[19:40] <eroomde> made lunch for lots of people, all ate a lot and drank a lot, and sort of passed out on the sofa
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[19:41] <eroomde> only recently come back round, trying to organize something to do
[19:41] <eroomde> you?
[19:41] <Dan-K2VOL> Haha sounds like a nice saturday break
[19:41] <eroomde> every day is a break for me currently :)
[19:41] <Dan-K2VOL> I'm visiting the old crew in Knoxville TN this weekend
[19:42] <eroomde> ah nice
[19:42] <eroomde> what are they all up to?
[19:43] <Dan-K2VOL> oh Mike Coffey, the one who programmed the web systems and the DTRC client is starting up a hackerspace here
[19:43] <eroomde> ah grand
[19:44] <Dan-K2VOL> the rest are sort of on to normal life
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[19:46] <NigeyS> bleh, hey dan, ed
[19:46] <eroomde> bleh to you too
[19:49] <Dan-K2VOL> Heh hi Nigey
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[19:57] <Dan-K2VOL> How's your day thus far Nigey
[19:58] <NigeyS> crap lol
[19:59] <Laurenceb_> my too lol
[19:59] <NigeyS> lol
[19:59] <NigeyS> just cba doing anything :/
[19:59] <Laurenceb_> im trying to make my kalman filte rbehave
[19:59] <eroomde> i think we should get zeusbot to say 'hahahahahahahahaha!!! hehehehehehehehe!!! ahaha.. hee..' whenever anyone says lol
[19:59] <eroomde> it might train them out of the habit
[20:00] <NigeyS> Laurenceb, sounds fun!
[20:00] <NigeyS> eroomde, lol :p
[20:00] <Laurenceb_> lol
[20:01] Last message repeated 1 time(s).
[20:01] <NigeyS> !topwords
[20:01] <Dan-K2VOL> lol
[20:01] <HAMBotty> I don't have any wordstats in #highaltitude
[20:01] <NigeyS> dam
[20:01] <Laurenceb_> roflmao
[20:01] <Dan-K2VOL> hambotty sleepin?
[20:02] <NigeyS> think i disabled tem for in here, was quite a cpu hog
[20:02] <NigeyS> them*
[20:02] <NigeyS> !top10
[20:02] <HAMBotty> Top10(words): 1. eroomde(14433) 2. SpeedEvil(13272) 3. Randomskk(12230) 4. fsphil(12035) 5. Laurenceb(11690) 6. Dan-K2VOL(11650) 7. Darkside(7885) 8. cuddykid(7575) 9. Laurenceb_(7038) 10. Lunar_Lander(6623)
[20:02] <eroomde> that's a daming indightment
[20:02] <NigeyS> ;)
[20:02] <Dan-K2VOL> Haha yeah, I thought much more went on when I wasn't here :-P
[20:02] <eroomde> or maybe i should say:
[20:02] <eroomde> wow. lol
[20:02] <Laurenceb_> lol
[20:03] <Laurenceb_> im going to make that my favourite word now :P
[20:04] #highaltitude: mode change '+o eroomde' by ChanServ!ChanServ@services.
[20:04] <Laurenceb_> although it certainly doesnt apply to kalman filters
[20:04] <eroomde> just flexing the guns
[20:04] <NigeyS> uhoh
[20:04] <Laurenceb_> does mostwords give you operator?
[20:04] #highaltitude: mode change '-o eroomde' by ChanServ!ChanServ@services.
[20:04] <Laurenceb_> in which case i just need to say lol enough times
[20:05] Action: NigeyS hides
[20:05] <NigeyS> i shall return .. in linux, if it boots with this new hardware :|
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[20:14] <eroomde> not looking good for NigeyS
[20:15] <NigeyS> boo!
[20:15] <NigeyS> this has to be the slowest livecd i've ever used :
[20:15] <eroomde> i timed that well
[20:16] <NigeyS> hehe
[20:16] <NigeyS> trying linux mint
[20:16] <NigeyS> seems ok ..
[20:16] <eroomde> i couldn't get it to play nicely with my dual monitors
[20:16] <eroomde> ubuntu or debian?
[20:16] <NigeyS> ah i remember
[20:16] <NigeyS> debian
[20:17] <NigeyS> ubuntu told me my new hardware wasnt powerful enough to run unity, so i lol'd and took it off
[20:21] <Dan-K2VOL> Ah there's a couple of gorgeous girls next to me in the coffee shop discussing the geology of the asteroid Vesta!
[20:21] <NigeyS> ooo
[20:22] <Dan-K2VOL> Good god they're talking about how excited they are about the idea of sending a neutron spectrometer to Vesta
[20:22] <NigeyS> :o
[20:22] <eroomde> time to make conversation
[20:22] <eroomde> god speed Dan-K2VOL
[20:22] <Dan-K2VOL> haha
[20:22] <NigeyS> yush, do it !
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[20:23] <Dan-K2VOL> Oh they're leaving, I'm sure they're in the department at this uni that worked on the mars rovers
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[20:28] <NigeyS> This driver provides a highly experimental 3D acceleration for NVIDIA graphics cards, as a free alternative to the proprietary driver.
[20:28] <NigeyS> sounds like a world of pain
[20:33] <Dan-K2VOL> Lol well I googled for 30 seconds and found both of them
[20:36] <NigeyS> shocking ;)
[20:39] <eroomde> Dan-K2VOL: that's awful!
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[20:39] <eroomde> share the link
[20:39] <fsphil> we can email them for you? :)
[20:39] <NigeyS> haha
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[20:40] <Dan-K2VOL> Haha
[20:40] <Dan-K2VOL> Ok just a sec
[20:41] <fsphil> I'm looking forward to getting a good look at Vesta too
[20:41] <fsphil> won't be long now!
[20:43] <Dan-K2VOL> http://web.eps.utk.edu/faculty/grads.html Sheryl Singerling and I think Arya Udry :-P they were cuter in person
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[20:46] <eroomde> same supervisor
[20:46] <eroomde> adds up
[20:46] <eroomde> well, that's my stalker quota for the day all used up
[20:49] <Dan-K2VOL> Lol
[20:49] <Dan-K2VOL> me too
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[21:11] <Lunar_Lander> hello people
[21:11] <Lunar_Lander> hello mixio
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[21:16] <simhed> hi Lunar_Lander
[21:16] <Lunar_Lander> hi simhed
[21:18] <Lunar_Lander> how's life?
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[21:24] <simhed> good, finished getting my tracking hardware/software working yesterday, now trying to calculate how much helium should i put into the balloon
[21:25] <simhed> plus trying to figure out if i should put a plexiglass window to protect the camera and seal the payload, or should i just leave a hole in the polystyryne wall
[21:26] <simhed> considering an inside heating system and the latter, to avoid mist gathering on the glass
[21:28] <Lunar_Lander> ye
[21:28] <Lunar_Lander> +s
[21:28] <Lunar_Lander> sounds good
[21:28] <Lunar_Lander> the He question should be solved by the burst calculator
[21:29] <Laurenceb_> He man?
[21:32] <simhed> do you have a link anywhere handy perhaps?
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[21:33] <Lunar_Lander> http://www.srcf.ucam.org/~cuspaceflight/calc/
[21:33] <Lunar_Lander> :)
[21:34] <simhed> cheers :)
[21:34] <Lunar_Lander> you're welcome
[21:36] <simhed> what does neck lift mean?
[21:37] <simhed> is this the weight i should attach to the balloon to bring it to free float?
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[21:38] <Lunar_Lander> hi NigeyS
[21:39] <NigeyS> hey kev!
[21:39] <Lunar_Lander> it's the lift you get when you fill the balloon with the amount of He given below
[21:39] <NigeyS> bbs just cooking dinner
[21:39] <Lunar_Lander> ok
[21:39] <simhed> k, thnx
[21:40] <simhed> that's helpful :)
[21:40] <simhed> the calc i mean
[21:42] Action: Laurenceb_ owns
[21:42] <Laurenceb_> ekf running on dactyl
[21:43] <Laurenceb_> wasnt being intialised correctly
[21:44] <Lunar_Lander> you're welcome simhed
[21:44] <Laurenceb_> interesting - it takes ~30 seconds to stabilise itself then _rock_ solid as in ~1cm rms error
[21:45] <Laurenceb_> attitude quaternion components are stable to 5sf XD
[21:45] <eroomde> wahey
[21:45] <eroomde> my housemate just caught his fingers on the mandolin
[21:45] <eroomde> he looses the bet
[21:45] <eroomde> aswell as some flesh
[21:45] <Laurenceb_> eek
[21:46] Action: Laurenceb_ makes an offering to the temple of kalmaaaaaaan
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[22:13] Action: SpeedEvil wakes up.
[22:13] <SpeedEvil> Oooh - you got it working?
[22:15] <SpeedEvil> 1cm RMS seems ridiculously optimistic
[22:16] <SpeedEvil> The GPS isn't doing stationary pinning is it?
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[22:17] <SpeedEvil> I suppose the true test is to leave it on for a few hours sitting and measuring how far the desk is moving
[22:20] <Laurenceb_> well yeah thats in indoor mode
[22:21] <Laurenceb_> where it says gps is 0,0,0
[22:21] <Laurenceb_> cant get any gps inside.. presumably as the roof is wet
[22:21] <Laurenceb_> got 9 sats from on my desk last night, now nothing
[22:23] <Laurenceb_> im planning to make some changes to how the openpilot code works
[22:24] <Laurenceb_> atm it has a very small gps noise term - that lets the imu drift with ionospheric
[22:25] <Laurenceb_> the vertical is corrected by baro
[22:26] <Laurenceb_> i think it can use the error terms output by the module a bit more cleverly
[22:32] <Laurenceb_> http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToMatrix/program/index.htm
[22:32] <Laurenceb_> ^handy
[22:35] <SpeedEvil> Interesting (the concept)
[22:36] <Laurenceb_> they treat the noise as just the jitter
[22:36] <SpeedEvil> I suppose it's a valid approach.
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[22:37] <SpeedEvil> Given that you're not going to find accels that can kill the jitter over the 12 and 24 hour timescales.
[22:37] <SpeedEvil> I suppose sometimes baro altitude might do better, if you can get internet
[22:38] <SpeedEvil> Though if you have internet, you can do the position yourself more accurately from the psuedoranges and published ground station data
[22:47] <Laurenceb_> i think they use gps altitude and baro to derive sea level pressure
[22:47] <Laurenceb_> then low pass filter
[22:47] <Laurenceb_> im thinking just use baro for altitude
[22:48] <Laurenceb_> and use gps altitude for finding sea level pressure
[22:48] <Laurenceb_> if the specs are to be belived that will work much better, but my bmp085 seems a little noisy
[22:48] <Laurenceb_> need to do more tests
[22:49] <SpeedEvil> Hmm - sounds sane.
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[23:17] <Lunar_Lander> hello NigeyS
[23:18] <Lunar_Lander> nice to see you again
[23:18] <NigeyS> ty kev :)
[23:18] <Lunar_Lander> where have you been?
[23:20] <NigeyS> oh just been a busy bee
[23:21] <Lunar_Lander> ah
[23:21] <Lunar_Lander> :)
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[23:26] <Lunar_Lander> and how is your progress NigeyS?
[23:28] <NigeyS> pretty good i think
[23:31] <Lunar_Lander> that is good
[23:33] <Lunar_Lander> :)
[23:38] <NigeyS> brb
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[23:41] <Lunar_Lander> good night
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[00:00] --- Sun Jun 19 2011