highaltitude.log.20100528

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[11:42] <rharrison> Hey DanielRichman
[11:42] <DanielRichman> hey rharrison
[11:45] <rharrison> I think I'm right in saying that the GPSPort and GPSBaudrate don't make into the progdefaults
[11:50] <DanielRichman> yup
[11:51] <DanielRichman> I think so
[11:51] <DanielRichman> (I think they don't)
[11:52] <DanielRichman> rharrison, where did all these modifications to fr.po come from?
[11:53] <rharrison> fr.po?
[11:53] <rharrison> I would ignore that
[11:53] <DanielRichman> rharrison, hold on there's something here from confdialog.fl
[11:53] <rharrison> I did somthing with fluid which was bad
[11:53] <DanielRichman> callback {progdefaults.gpsDevice = o->value();
[11:53] <DanielRichman> 3358 3359
[11:53] <rharrison> cool
[11:54] <rharrison> so that should go through to confdialog.cxx
[11:54] <rharrison> Idealy
[11:55] <DanielRichman> rharrison, yeah
[11:55] <DanielRichman> rharrison, + gps_serial.read_line(buffer,200);
[11:55] <DanielRichman> 193
[11:55] <DanielRichman> what does the 200 here refer to? max length?
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[11:56] <jcoxon> hehe Jonathan Trappe made it across the channel with his cluster balloon
[11:56] <DanielRichman> jcoxon, hey
[11:57] <DanielRichman> jcoxon, had a question I needed to ask
[11:57] <DanielRichman> jcoxon, you mentioned a while back that the linux based payloads were unreliable. What specifically about them was it that made this so?
[11:57] <DanielRichman> rharrison, I like the commit :)
[11:57] <rharrison> fsphil
[11:57] <rharrison> Opps
[11:57] <jcoxon> ummm partially because i made them :-p
[11:58] <DanielRichman> rharrison, however you have not git added misc/dl_fldigi_gps
[11:58] <SpeedEvil> DanielRichman: Lots of complexity.
[11:58] <DanielRichman> rharrison, or whatever it was called
[11:58] <jcoxon> also gumstixs are a challenge to solder to
[11:58] <rharrison> ohh yep :)
[11:58] <jcoxon> so i think it was more of a hardware issue
[11:58] <DanielRichman> solder a gumstix!? you mad?
[11:58] <SpeedEvil> DanielRichman: Hardware not optimised for huge temp swings.
[11:58] <DanielRichman> SpeedEvil, hmm I see
[11:58] <rharrison> and dl_fldigi_serial
[11:58] <DanielRichman> :)
[11:58] <jcoxon> SpeedEvil, actually the hardware has always worked
[11:59] <SpeedEvil> ah
[11:59] <jcoxon> more the comms would be the unreliable bit
[11:59] <SpeedEvil> Also - expensive
[11:59] <jcoxon> yes
[11:59] <rharrison> DanielRichman, but if it's a carrier board I wouldn't worry about it too much
[11:59] <DanielRichman> the plan for a2 is an AVR based "main" board in control of the transmitter and gps, but with a connection to serial and reset pins of a linux board
[11:59] <DanielRichman> on which the fun stuff will take place
[11:59] <SpeedEvil> It's expensive enough it may be overr half the cost of the launch
[11:59] <jcoxon> that sounds sensible
[11:59] <DanielRichman> SpeedEvil, the main reason for a linux board is a sponsor wants to do something with it
[11:59] <DanielRichman> so is not an issue :)
[11:59] <SpeedEvil> ah
[12:00] <sbasuita> you could use real-time kernel to get proper comms sync out of the gumstix
[12:00] <DanielRichman> sbasuita, waste of time
[12:00] <jcoxon> yeah a lot of work for very little return
[12:00] <jcoxon> for say my new sstv payload i'd get avr to do the basic comms
[12:00] <jcoxon> and the gumstix does the sstv
[12:01] <DanielRichman> do you think that the bifferboard, which is cheaper than a gumstix, has enough (32MB of ram rather than 256MB & slower CPU) beef to do image processing?
[12:01] <sbasuita> don't the sstv symbols have to be tx'd on time though?
[12:01] <DanielRichman> sbasuita, the AVR will do the time critical bit of our SSTV
[12:01] <jcoxon> sbasuita, oh i mean the rtty
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[12:01] <DanielRichman> sbasuita, the gumstix will just feed binary data on a serial port and the avr can deal with it
[12:01] <DanielRichman> or even the STM32; haven't decided
[12:01] <jcoxon> i'm going for the 2 radio approach
[12:02] <jcoxon> so my normal avr board doing rtty
[12:02] <jcoxon> and then a seperate ntx2 attached to the audio out of the gumstix
[12:02] <DanielRichman> so sstv over FM?
[12:02] <DanielRichman> rather than SSB?
[12:02] <jcoxon> can do both
[12:02] <jcoxon> steve has the code for both
[12:03] <DanielRichman> hmm isn't the audio out cap. coupled or something?
[12:03] <jcoxon> nope
[12:03] <DanielRichman> groovy
[12:03] <jcoxon> DanielRichman, we've done this before :-p
[12:03] <DanielRichman> SSTV is going to be so much fun :P
[12:04] <DanielRichman> sbasuita, we can have the linux board generate funky graphics etc. to superimpose
[12:04] <DanielRichman> imagemagick or something
[12:04] <jcoxon> haha i can see cogs turning
[12:05] <jcoxon> the registrar launch guys wanted to borrow my sstv payload
[12:05] <DanielRichman> :O
[12:05] <jcoxon> but they only gave me 1 week to rebuild it
[12:06] <jcoxon> as they want to demo it on tuesday
[12:06] <jcoxon> which is the day of my exam
[12:06] <jcoxon> eek
[12:06] <russss> considerate of them.
[12:06] <jcoxon> yeah i've said can't do it
[12:06] <SpeedEvil> Ah - boring commitments.
[12:07] <jcoxon> considering its taken me 3 days to rebuild my gumstix build environment
[12:07] <SpeedEvil> Though I imagine it's anything but boring.
[12:07] <jcoxon> should get something up soon
[12:10] <rharrison> jcoxon, is this part of the paper airplane stuff
[12:10] <jcoxon> yeah
[12:10] <rharrison> Good
[12:11] <rharrison> I'm x'ing that off my list
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[16:54] <rharrison> Randomskk, jonsowman could you do me a favor one of you and PM me the crontab -l output for the user running the cusf pred scripts?
[16:55] <rharrison> I seem to not be getting all the data before calculating the points. I'd be interested to see the CUSF set up
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[18:16] <Lunar_Lander> hello
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[18:40] <Lunar_Lander> why is it so silent here these days?
[18:41] <SpeedEvil> We are all out huntin wabbit!
[18:41] <Lunar_Lander> ah I see
[18:42] <stilldavid> I'm taking a week off before I start on the next payload
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[18:45] <hyte> hi
[18:45] <Lunar_Lander> hi
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[19:07] <Lunar_Lander> hi natrium42
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[19:29] <hyte> quick question, why are receivers usb/lsb when the Radiometrix NTX2 module is fm?
[19:29] <SpeedEvil> Because they aren't really SSB
[19:29] <SpeedEvil> they are basically being used as downconverters only
[19:30] <SpeedEvil> the 'decoder' is really a FM decoder in the soundcard
[19:30] <SpeedEvil> http://ukhas.org.uk/guides:tracking_guide
[19:32] <hyte> thanks, I've read that before but not fully understood it. what would an fm radio hear? and would am work but just not as well.
[19:33] <SpeedEvil> An FM radio would hear a low buzzing noise.
[19:33] <SpeedEvil> Very faintly
[19:33] <SpeedEvil> A AM radio would hear a constant carrier
[19:37] <Lunar_Lander> SpeedEvil can I ask you for a favour?
[19:38] <SpeedEvil> sure.
[19:38] <Lunar_Lander> I did this altitude calculation with the excel spreadsheet
[19:38] <Lunar_Lander> and now I would like to check it against actual flight results
[19:39] <Lunar_Lander> so I would need about five flights with all data: max.altitude, inflation volume, balloon type, payload mass
[19:39] <SpeedEvil> Sorry - I don't have any such data.
[19:39] <Lunar_Lander> ah I see
[19:39] <SpeedEvil> Maybe look to see if any are on the wiki?
[19:39] <Lunar_Lander> good idea
[19:39] <SpeedEvil> Or if you can extract previous tracker logs?
[19:41] <Lunar_Lander> how does that work?
[19:41] <SpeedEvil> oh
[19:41] <SpeedEvil> right - that won't have that, no.
[19:41] <Lunar_Lander> yeah wanted to say that :P
[19:42] <DanielRichman> Lunar_Lander, ask rjharrison who I believe will have the logs
[19:42] <Lunar_Lander> yeah
[19:42] <Lunar_Lander> I'm on his website
[19:42] <DanielRichman> Lunar_Lander, but there's the cuspaceflight legacy spreadsheet around somewhere
[19:42] <Lunar_Lander> he has quite good charts
[19:42] <DanielRichman> bbl
[19:42] <Lunar_Lander> ok thanks
[19:42] <DanielRichman> Lunar_Lander, also see cuspaceflight/calc
[19:43] <Lunar_Lander> I know that one :)
[19:43] <DanielRichman> :) bbl
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[21:14] <cuddykid> Hi all, lassen iQ arrived yesterday! So small!! Samtec samples arrived today (connectors). However the samtec sample doesn't fit on the lassen iq connector as the metal casing of the iq is too narrow :/ .. Has anyone else had this problem? I could see the solution be trimming the metal edges to the connector area but don't want to do that if avoidable!?!
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[21:54] <DanielRichman> cuddykid, i had to bend two tiny flaps
[21:54] <DanielRichman> see if you can match this pic http://alienproject.wordpress.com/2009/04/15/workshop-15-picture-post/3-gps-processor-bottom/
[21:54] <DanielRichman> cuddykid, also BE WARNED. the samtec pin marking for pin 1 is infact pin 8
[21:54] <DanielRichman> when you insert it the way round that you think you should due to the notch in the iQ
[21:54] <Randomskk> that's a bit annoying
[21:55] <DanielRichman> cuddykid, make 201% sure by referring to datasheets and t he multimeter that you've got it right when you turn it on or you'll burn it out
[21:55] <DanielRichman> I think in that pic I linked it's in the wrong way around
[21:56] <DanielRichman> opposite away round in this pic http://alienproject.files.wordpress.com/2009/06/computer-close.jpg
[21:56] <Randomskk> so when are you gonna be launching alien2? :o
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[22:34] <DanielRichman> Randomskk, this summer ofc
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[22:34] <Lunar_Lander> DanielRichman Robert's page was helpful!
[22:34] <Lunar_Lander> :P
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[23:38] <Jasperw> is this useful for tracking: http://websdr.ewi.utwente.nl:8901/
[23:38] <Jasperw> (as an automated thing?)
[23:39] <SpeedEvil> I vaguely recall someone tried to use it.
[23:39] <SpeedEvil> I don't recall any success.
[23:39] <Jasperw> ah, it dosn't do 430-440Mhz?
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[23:41] <SpeedEvil> Though you have to admit - it is very pretty.
[23:41] <Jasperw> yes :)
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[00:00] --- Sat May 29 2010