highaltitude.log.20100902

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[01:44] <Darkside> hey juxta
[01:45] <natrium42> hi juxta & Darkside
[01:45] <natrium42> juxta, did you bring pix? :)
[01:45] <Darkside> what do you think of having one half of a 40m dipole going up from the payload along the string, and the other half trailing down to a small weight?
[01:48] <SpeedEvil> I suggest making it rotate, and having two weights that swing round at high speed with a rotating horizontal antenna.
[01:48] <SpeedEvil> Not for any particular reason - it'd look cool though.
[01:49] <Darkside> pfffffffff
[01:50] <Darkside> i'd love to have it horizontal :P
[01:50] <Darkside> but thats going to be a bit hard :P
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[01:55] <SpeedEvil> Hmm.
[01:55] <SpeedEvil> Be easy with 2 balloons
[01:55] <Darkside> pff
[01:56] <Darkside> easy?
[01:56] <Darkside> just easier to have a vertical dipole :P
[01:57] <SpeedEvil> Well - easy - you have two balloons on a y-shaped string
[01:57] <SpeedEvil> near the necks, you put the horozontal element - which is spaced by the diameter.
[01:58] <Darkside> haha
[01:58] <Darkside> nah, i think i'll do a vertical dipole :)
[01:58] <SpeedEvil> PRobably easier
[02:01] <SpeedEvil> Hmm. In principle. Take a 'ladder' structure but with the rungs at 45 degrees - like \/\/\ - and then have this horizontal 20m - or whatever long. Now, connect to a balloon by strings ~100m long at 4 or 5 points.
[02:01] <SpeedEvil> Though in pracrtice, this would be silly
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[02:43] <juxta> hey Darkside, natrium42
[02:43] <juxta> Darkside, that sounds fine :)
[02:44] <juxta> natrium42, had my lightroom HDD fail on me. just sorted the pics now: www.bogaurd.net/horus7
[02:44] <juxta> now to put them on the blog
[03:48] <Darkside> coool
[03:48] <Darkside> of course i already have those images :P
[04:22] <Darkside> DanielRichman: about?
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[06:12] <Darkside> /names
[06:12] <Darkside> whoops
[06:12] <Darkside> who here was working on dl-fldigi?
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[06:41] <Darkside> hey rharrison
[06:41] <rharrison> Hi Darkside
[06:41] <rharrison> How is it going
[06:42] <Darkside> can dl-fldigi not send to a server?
[06:42] <Darkside> i want to do some testing with it
[06:42] <rharrison> Oh do you mean send to an alternative server
[06:42] <Darkside> or no server at all, just log to a file
[06:42] <Darkside> and log the properly decoded data, not just log everything
[06:43] <rharrison> I think you can turn off sending to the server
[06:43] <Darkside> im just trying to compile the latest version
[06:43] <rharrison> I'm not too bothered if you want to do some testing use the server
[06:43] <Darkside> the 3.11 version i had doesnt have it
[06:43] <Darkside> im just having to fo a full macports update because i was gettinc curl errors
[06:43] <rharrison> I'm not sure that the new one does either
[06:44] <Darkside> In file included from /opt/local/include/curl/curl.h:44, from ./include/dl_fldigi.h:14, from dialogs/confdialog.cxx:10:
[06:44] <Darkside> /opt/local/include/curl/curlrules.h:144: error: size of array __curl_rule_01__ is negative
[06:44] <Darkside> /opt/local/include/curl/curlrules.h:154: error: size of array __curl_rule_02__ is negative
[06:44] <Darkside> wheeee
[06:44] <rharrison> But you should be able to turn off posting the data to the serve in the dl options
[06:44] <rharrison> humm
[06:44] <rharrison> DanielRichman, is your man for that
[06:44] <Darkside> oh cool
[06:45] <Darkside> he'll be on later tonight
[06:45] <Darkside> well, i guess so anyway, not sure about time zones
[06:45] <rharrison> I'm sure there is an offline option on almost all versions of dl-fldigi and you can set this to off if you just was to decose to the screen
[06:46] <rharrison> or for that matter don't use the --hab option and use as normal
[06:46] <rharrison> that is as good as test as any
[06:46] <Darkside> ahh not what i mean
[06:46] <rharrison> If you are interested in the posted output then just log to the server and see view.php
[06:46] <Darkside> i meant if the received data passes the checksum, save it to a file
[06:47] <Darkside> oh ok
[06:47] <rharrison> Yep that would be good
[06:47] <rharrison> Ask DanielRichman, he might implement that for you or you could right it
[06:47] <Darkside> heh ok
[06:47] <rharrison> write
[06:47] <rharrison> :)
[06:47] <Darkside> hmm i wonder what the highest bit-rate data mode fldigi supports is
[06:47] <rharrison> Need coffee
[06:47] <Darkside> i see a psk-500 now
[06:48] <rharrison> We have done 300 baud rtty fine
[06:48] <Darkside> yeah
[06:48] <Darkside> i'd like to go higher than that if possible
[06:48] <Darkside> 600 baud FSK would be cool
[06:48] <Darkside> or 1200 baud
[06:48] <rharrison> It's not as good at distance though
[06:48] <rharrison> Yep
[06:48] <Darkside> even if its just over FM
[06:48] <rharrison> Right coffee time
[06:48] <Darkside> also it would mean being able to decode commercial telemetry systems
[06:48] <rharrison> FM has less distance
[06:48] <rharrison> than USB
[06:49] <rharrison> OK not for HAB then
[06:49] <Darkside> heh
[06:49] <Darkside> this is more for the fldigi people than for you :P
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[07:01] <Darkside> i like cocks lol
[07:07] <Darkside> juxta: about?
[07:07] <Darkside> HEY
[07:07] <Darkside> SHENKI
[07:08] <Darkside> above post about cocks not written by me...... go complain to shenki (in #qemurulez) about that one...
[07:10] <Darkside> this is why i need to lock my computer whenever i leave i for a fe wminutes..
[07:20] <Upu> Darkside when you instal dl-fldigi you get 2 icons, HAB mode and normal just run it in normal
[07:21] <Upu> morning
[07:24] <Darkside> heh
[07:24] <Darkside> i cant actually compile it atm
[07:26] <Upu> What O/S you on ?
[07:27] <Darkside> OSX
[07:27] <Darkside> im just updating curl in macports
[07:27] <Darkside> since thats where the error was
[07:28] <Upu> oh Mac..obligatory upgrade to a PC comment
[07:28] <Darkside> dont you dare :P
[07:28] <Upu> :)
[07:36] <Darkside> Upu:
[07:36] <Darkside> In file included from /opt/local/include/curl/curl.h:35, from ./include/dl_fldigi.h:14, from dialogs/confdialog.cxx:10:
[07:36] <Darkside> /opt/local/include/curl/curlrules.h:143: error: size of array __curl_rule_01__ is negative
[07:36] <Darkside> /opt/local/include/curl/curlrules.h:153: error: size of array __curl_rule_02__ is negative
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[07:54] <Upu> Sorry Darkside I'm not into the programming side of things
[07:56] <fsphil> d'oh -- my atu was returned but they forgot to put the antenna cable back in the box.
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[09:24] <rharrison> Darkside, lol re above. Looks like your friends have a sense of humor
[09:51] <DanielRichman> Darkside: if you compile the latest there is an "online" option which you can of course turn off, if you start without the --hab flag then it's off by default
[09:51] <DanielRichman> everything that it would have done, were it online, is spewed out of stderr
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[09:53] <DanielRichman> However I have no idea why "size of array __curl_rule_01__ is negative". jcoxon has compiled - and continues to succesfully package fldigi for the mac
[09:58] <fsphil> seems to be a common problem
[09:59] <fsphil> http://curl.haxx.se/mail/lib-2008-09/0051.html
[09:59] <m1x10> morning all
[10:00] <m1x10> seems like when I have two gps very close bad things happen !
[10:01] <fsphil> "A "sudo port install curl" cleared up the curl_rule issue"
[10:02] <m1x10> I have EM406 polling in a while(1) manner. I have the FSA03 polling every minute. When FSa03 is not working EM406 is locked. When Fsa works immediatelly EM406 unlocks then locks again.
[10:02] <m1x10> GPGGA,100144.000,4038.5548,N,02256.8591,E,1,00,50.0,119.2,M,36.1,M,,0000
[10:02] Last message repeated 1 time(s).
[10:02] <m1x10> GPGGA,100144.000,,,,,0,00,50.0,,M,37318550546624283000.0,M,,0000
[10:02] Last message repeated 2 time(s).
[10:02] <m1x10> GPGGA,100145.000,4038.5551,N,02256.8593,E,1,03,50.0,119.0,M,36.1,M,,0000
[10:04] Last message repeated 1 time(s).
[10:04] <Laurenceb> we know where you are
[10:04] <m1x10> :)
[10:04] <Laurenceb> interference?
[10:04] <m1x10> 100%
[10:05] <DanielRichman> fsphil: http://github.com/danielrichman/dl-fldigi/commit/0eb36de2a85dfbb54a53ecfa8f8b9f48a3366062 ?
[10:05] <m1x10> just only when FSA polls EM406 unlocks.
[10:05] <DanielRichman> m1x10: what are both gpses connected to?
[10:05] <m1x10> arduino
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[10:05] <DanielRichman> if they're both connected to the same arduino your code could be causing it
[10:05] <m1x10> separate
[10:05] <DanielRichman> two arduinos?
[10:05] <m1x10> y
[10:05] <DanielRichman> :o
[10:05] <m1x10> :)
[10:06] <DanielRichman> and so you've got two terminals open reading serial data?
[10:06] <DanielRichman> also, hi eroomde :)
[10:06] <m1x10> yeah
[10:06] <fsphil> DanielRichman, oops - forgot that
[10:06] <DanielRichman> fsphil: :)
[10:06] <m1x10> just only when FSA polls EM406 unlocks.
[10:06] <eroomde> hi DanielRichman - just a flying visit, am heading out in a jiff to play with grapes
[10:06] <m1x10> it 100% interference
[10:06] <eroomde> how things?
[10:06] <m1x10> but they are very close
[10:06] <m1x10> 2-3cm
[10:07] <m1x10> antennas
[10:07] <DanielRichman> all good. Sorry, I killed your old irssi session w. a reboot
[10:07] <eroomde> np
[10:07] <DanielRichman> some "any user gets local root" vulnerabilities >.>
[10:07] <eroomde> if i got upset about that kind of thing...
[10:08] <m1x10> ok now I moved FSA on the other side of the box and EM406 doesnt unlock.
[10:08] <m1x10> oh now it unlocks. but not at every FSA03 poll.
[10:09] <DanielRichman> eroomde: depending on how long you're around for I'd be interseted on your comments on http://groups.google.com/group/ukhas-tools/browse_thread/thread/f555b611c3feb6fe
[10:09] <DanielRichman> though if you're in a rush d/w
[10:11] <DanielRichman> fsphil: I'm going to see if I can beat these signal()s into submission
[10:11] <Darkside> hey DanielRichman
[10:11] <DanielRichman> morning
[10:12] <Darkside> how exactly are you generating audio from your dominoEX code?
[10:12] <eroomde> DanielRichman: ok let me have a look. I may not have time to repond right now (it's drinks time over here)
[10:12] <Darkside> it looks like its just writing the frequency value to the DAC
[10:12] <jonsowman> hi eroomde :)
[10:12] <eroomde> something something somthing VCO. something something something COMPLETE
[10:12] <Darkside> also i kind of managed to get it working with my signal gen, but its not doing the frequency shifts properly
[10:12] <eroomde> that should answer your question, Darkside
[10:13] <Darkside> well yes
[10:13] <DanielRichman> Darkside: the NiM2 or NTX2s are FM transmitters but we receive in SSB mode
[10:13] <Darkside> thats what im thinking
[10:13] <Darkside> ohhhhh
[10:13] <Darkside> i see
[10:13] <Darkside> ok, so how do the base and shifts correspond to actual output frequency?
[10:14] <DanielRichman> er... by trial and error :P
[10:14] <Darkside> i.e. what voltage is what shift
[10:14] <Darkside> hahaha
[10:14] <Darkside> damn
[10:14] <Darkside> i guess ill have to try and tune mine too
[10:14] <Darkside> will prolly use your app :P
[10:14] <DanielRichman> yeah see usart_dac.{c,py}
[10:14] <SpeedEvil> http://ukhas.org.uk/guides:tracking_guide
[10:14] <Darkside> what usart are you using?
[10:14] <DanielRichman> and then once I had a rough idea I just tried it until it worked
[10:14] <Darkside> the one that goes via the ATUSB?
[10:14] <DanielRichman> yeah that's the one
[10:15] <Darkside> hmm on windows or nix?
[10:15] <Darkside> not sure how to get that working on OSX
[10:15] <DanielRichman> USARTC0
[10:15] <Darkside> ahh
[10:15] <m1x10> hey, see my pic: http://imagebin.org/112375
[10:16] <DanielRichman> is connected to the atusb, and that either showed up as /dev/ttyACM0 or /dev/ttyUSB0; I can't remember which
[10:16] <m1x10> in that distance still have interference
[10:16] <Darkside> DanielRichman: hmm
[10:17] <m1x10> Darkside, lol. I just sew the funny message from your friend !
[10:17] <Darkside> 'funny message'
[10:17] <Darkside> :(
[10:17] <m1x10> cocky-message !
[10:17] <m1x10> haha
[10:18] <m1x10> that specific thing happened at least one time to most of us.
[10:19] defy (~defy@ip-118-90-21-40.xdsl.xnet.co.nz) joined #highaltitude.
[10:19] <defy> still growing i see :)
[10:22] <eroomde> hey defy
[10:22] <defy> hows it going?
[10:23] <eroomde> not bad. just graduated. last time we really spoke I hadn't yet started at university
[10:23] <eroomde> (it's edmoore)
[10:23] <defy> i remember :) congrats
[10:24] <eroomde> ta. how are things with you?
[10:24] <defy> its been quite a while, probably 2007ish since i really came in here and had a good chat
[10:25] <defy> not bad, im a flight instructor here in auckland now...the caa have just released the first copy of the AC regarding UAVS, and my boss wants me to head a uav project for next year, so I'm dusting off all my old gear, thought i'd stop in and say hey
[10:25] <eroomde> oh brill
[10:25] <eroomde> that's exciting
[10:25] <defy> yea i couldn't believe it when he told me he's willing to pay me to do what i used to do as a hobby
[10:25] <eroomde> what sort f UAV?
[10:26] <defy> just a general platform at this stage, something to build onto...the caa are allowing upwards of 150kg max weight, so potentially something quite large
[10:27] <defy> possibly a flir as payload
[10:27] <eroomde> flir?
[10:27] <Laurenceb> forward looking infra red?
[10:27] <SpeedEvil> Hi.
[10:28] <defy> forward looking infrared camera
[10:28] <SpeedEvil> Fuck, that's damn huge.
[10:28] <SpeedEvil> What regs are there on that?
[10:28] <defy> lots :P
[10:28] <SpeedEvil> :)
[10:28] <defy> something that large will require all the same certification as a manned aircraft
[10:28] <SpeedEvil> Is there an unregulated weight limit?
[10:28] <SpeedEvil> Well - there are manned aircraft in that weight range! With pilot.
[10:29] <defy> there are 6 categories in the first AC, up to category 3 (about 30kg i think) won't need too much certification
[10:29] <defy> yea but those aren't real aircraft, those are microlites
[10:29] <defy> they don't count :)
[10:29] <SpeedEvil> http://en.wikipedia.org/wiki/Colomban_Cri-cri
[10:29] <SpeedEvil> That's a real aircraft
[10:29] <eroomde> defy: i've just been flying with uav's with ir cams
[10:29] <SpeedEvil> There is even a jret variant.
[10:30] <defy> SpeedEvil I've seen one of those first hand, bloody death trap, you'd never catch me in one
[10:30] <eroomde> more downward looking
[10:30] <eroomde> http://imagebin.org/index.php?mode=image&id=112377
[10:30] <SpeedEvil> And OK - you'd need a 40Kg pilot to hit 150Kg. :)
[10:30] <SpeedEvil> defy: yeah - they are a bit silly.
[10:31] <eroomde> we were trying to study hydrology in the alps. our bit was generating 3d tomography maps in real time and superimposing thermal data onto them, so there was a fair bit of computing horsepower on the blimp
[10:31] <defy> very cool
[10:31] <SpeedEvil> I will note that the 747 has killed thousands of times more people than teh cricri. :)
[10:31] <SpeedEvil> eroomde: Why are you doing it on the blimp?
[10:31] <SpeedEvil> eroomde: Oh - manned blimp?
[10:32] <eroomde> no
[10:32] <eroomde> blimp has endurance and stability
[10:32] <defy> SpeedEvil the name cracks me up, one flight and your wife is crycrying?
[10:33] <SpeedEvil> eroomde: I mean why are you superimposing on the blimp - and not simply downlonking.
[10:33] <eroomde> because the stereo cameras produce about 500MBit each
[10:33] <eroomde> need to decimate that right down
[10:33] <SpeedEvil> Ah.
[10:34] <defy> eroomde how much wind could it handle ?
[10:34] <eroomde> although you could just about get away with a pair of SSDs in RAID
[10:35] <eroomde> defy: well, that particular one actually couldn't hadnle the winds on that last day, but the slightly slimmer one we're using for version 2 (yes, there needs to be a new one....) can take about 12m/s happily enough
[10:35] <SpeedEvil> Or several 2.5" drives
[10:35] <eroomde> SpeedEvil: really don't want mechanical drives on that thing
[10:36] <eroomde> it gets wet, cold, and that photo was taken at about 2300m, and we went a fair bit higher too
[10:36] <defy> pretty cool, blimps definitely have their place...thats something we haven't even considered yet
[10:36] <defy> we'll looking at commercial work like powerline inspection and ag spraying...basically we're trying to get rid of our own jobs at pilots...probably not the best idea but pretty fun
[10:37] <eroomde> i agree - they're quite a nice fit for a few applications, but certainly have their limits
[10:37] <defy> as*
[10:37] <defy> has james done any launches lately?
[10:37] <eroomde> not that lately
[10:38] <eroomde> i think the last one was Nova18/Pegasus
[10:38] <eroomde> with SSTV
[10:38] <defy> is that the one that ended up in the ocean?
[10:38] <SpeedEvil> True.
[10:38] <eroomde> nope
[10:38] <eroomde> we got it back, saw it coe down too
[10:39] <eroomde> it was Nova 18, 'Squirrel' (CUSF android phone), a private experiment, and pegasus
[10:39] <SpeedEvil> Also - someone recovered one that went in the ocean.
[10:39] <eroomde> a fun day, actually
[10:39] <SpeedEvil> In a boat.
[10:39] <SpeedEvil> And it was still taking pictures.
[10:39] <SpeedEvil> I forget who it was - someone dutch?
[10:39] <SpeedEvil> I'm blanking on the name.
[10:40] <eroomde> defy: http://www.flickr.com/photos/cuspaceflight/sets/72157624203062811/
[10:40] <defy> haha, awesome
[10:40] <SpeedEvil> I want to get my own UAV up.
[10:40] <SpeedEvil> http://www.mauve.plus.com/test.png
[10:41] <SpeedEvil> ~1Kg vectored thrust helicopter optimised for vertical climb.
[10:41] <defy> where is the antitorque?
[10:42] <SpeedEvil> The initial design is to have the four vanes at the bottom act as a countertorque.
[10:42] <defy> have you looked at a quadrocopter design? they are very stable
[10:42] <SpeedEvil> As well as independant manouvering things.
[10:42] <SpeedEvil> yes.
[10:42] <SpeedEvil> But they are much larger, and do not have shrouded blades.
[10:43] <SpeedEvil> I agree, they are technically better in some ways, and lots easier.
[10:43] <SpeedEvil> The wrinkle in this is that you can also attach a wing.
[10:43] <eroomde> right gtg, catch you all later
[10:44] <SpeedEvil> So you get a bimodal thing that's either a helicopter, or a VTOL capable (in principle, though probably not in pratice) winged device
[10:44] <SpeedEvil> WAve eroomde
[10:45] <defy> later eroomde
[10:45] <defy> interesting, i designed a winged quadrocopter a few years back
[10:45] <defy> never actually made the aircraft, was just a concept
[10:46] <defy> i miss playing with my toys, all i get to do these days is nearly die by the hands of crazy students
[10:47] <SpeedEvil> :)
[10:48] <SpeedEvil> Making a UAV that performs as well as a crazy student may still be challenging I guess.
[10:48] <defy> I have no doubts that I can teach a computer to fly quicker than a human
[10:49] <SpeedEvil> Edge cases are annoying.
[10:49] <SpeedEvil> But true.
[10:49] <defy> teaching someone to hover takes weeks
[10:50] <SpeedEvil> Especially in a cessna.
[10:51] <SpeedEvil> :)
[10:51] <defy> haha, i dont do fixed wing :P
[10:51] <SpeedEvil> My helicopter piloting is limited to virtual, and ones weighing under 100g. :)
[10:52] <SpeedEvil> But I do have a sort-of-project to do an autopilot for the latter.
[10:52] <SpeedEvil> Which could be fun.
[10:52] <SpeedEvil> The profusion of MEMS chips is nice for that.
[10:52] <defy> sweet, that would be a challenge for sure, but its definitely possible
[10:52] <SpeedEvil> Tiny packages quite adequate for autopiloting, and even mobile cameras that are useful too.
[10:53] <SpeedEvil> There are some insanely awesome people out there.
[10:53] <SpeedEvil> http://www.rcgroups.com/forums/showthread.php?t=961876
[10:53] <SpeedEvil> A RC plane in 225mg
[10:53] <defy> jeez
[10:53] <defy> lol
[10:54] <SpeedEvil> It looks like a kids sketch of an aeroplane, and it flies!
[10:55] <SpeedEvil> What sort of airframe are you planning? Quad?
[10:56] <defy> we'll start with a simple glider to start with, may move onto something rotory later
[10:57] <DanielRichman> fsphil: Unless I'm missing something, this http://pastebin.com/wXMYN2WG (the pthreadswin32 implementation) might be why it doesn't work
[10:58] <SpeedEvil> defy: Sounds sane.
[10:58] <SpeedEvil> defy: Motorgliders are probably a good place to start if you want long duration.
[10:59] <DanielRichman> bbiab
[11:00] <SpeedEvil> defy: Annoyingly - the above was designed when there was a gap in the regulations meaning it was not regulated. It now is, which makes the buisness model awkward - but meh.
[11:03] <fsphil> Am I reading that right DanielRichman, that function doesn't actually do anything?
[11:05] <defy> sleep for me, good chatting, no doubt ill be back to pick the channels brains sometime soon
[11:06] <SpeedEvil> Wave.
[11:06] <SpeedEvil> Laurenceb: has done some fun stuff
[11:07] <Laurenceb> cya
[11:07] <Laurenceb> has done :P
[11:07] <Laurenceb> too busy these days :(
[11:07] <SpeedEvil> :/
[11:08] <Laurenceb> on the + side my garden is done
[11:09] <SpeedEvil> Woo!
[11:09] <SpeedEvil> :)
[11:09] <SpeedEvil> I need to pick some apples
[11:09] <Laurenceb> that was taken a couple of weeks ago - now has a custom size shed and fully seeded grass http://i.imgur.com/Lr8yi.jpg
[11:09] <SpeedEvil> I would guess there are perhaps 10 bags of apples to come in.
[11:09] <Laurenceb> brb
[11:09] <Laurenceb> neat
[11:09] <SpeedEvil> Looking good.
[11:09] <Laurenceb> saves some shopping
[11:10] <Laurenceb> walls took way too long
[11:10] <Laurenceb> one on rhs had to be rebuilt
[11:10] <Laurenceb> brb
[11:10] <SpeedEvil> http://www.flickr.com/photos/14560445@N08/4932081050/ - been doing lawns and stuff this year.
[11:10] <SpeedEvil> I need to do rebuilding walls too. :)
[11:25] <DanielRichman> fsphil: exactly
[11:29] <DanielRichman> to quote a random place on the internet, "Windows is not POSIX. It does not have signals"
[11:29] <DanielRichman> >.>
[11:35] <fsphil> gah
[11:37] <DanielRichman> It gets worse
[11:37] <DanielRichman> according to a java bug report,
[11:37] <DanielRichman> "The native win32 IO semantics are
[11:37] <DanielRichman> synchonous io and asynchronous io. There is no IO semantics
[11:37] <DanielRichman> that is equivalent to interruptable io."
[11:38] <DanielRichman> perhaps I could set a (reasonably large) timeout on IO and then check a global variable to see if we want the thread to exit
[11:38] <DanielRichman> bit ugly
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[11:50] <fsphil> I don't think there's any other way
[11:51] <DanielRichman> so basically if you want the serial thread to restart and it's currently blocked inside something you'll have to wait 10s. No biggie.
[11:55] <fsphil> yea
[11:56] <fsphil> though the timeout could be a lot less, it won't have any real impact even if it's 2 seconds
[11:57] <DanielRichman> ok. There are some interesting timeout options; you can set the timeout based on
[11:57] <DanielRichman> - maximum time between two bytes arriving (ie. if the comm port goes totally silent for more than <x> it times out)
[11:57] <DanielRichman> - maximum overall time spent in Read() as a product of the number of bytes requested and <y>
[11:58] <DanielRichman> - a constant to add to the above
[11:58] <DanielRichman> I'm going to set it to 1000, 5000 - that is, if the commport goes totally silent it will timeout in 1s, otherwise it times out in 5s
[12:02] <fsphil> keep them both 1s .. if someone wants the thread dead, they don't care if it's current receiving
[12:02] <fsphil> +ly
[12:08] <DanielRichman> perhaps we need an ungetc() call; so that if it times out and the fscanf drops out, but the serial_updated flag isn't set and it loops around to the getchar(), that call could pop the 'G' off the stream and therefore cause us to lose a whole GPGGA string
[12:09] <DanielRichman> ie. once fgetc has found a '$' maybe it should put it back into the buffer
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[12:10] <DanielRichman> actually; ignore that. If it times out they'll return EOF and we close the stream whatever >.>
[12:10] <DanielRichman> don't want it to time out accidentally on valid data
[12:16] <fsphil> should never happen
[12:49] <rharrison> juxta, cool pics was that on your chinise balloon
[12:49] <juxta> rharrison, yup :)
[12:50] <rharrison> Just read the 6 and 7 reports
[12:50] <rharrison> Shame someone didn't catch the payload
[12:50] <juxta> haha
[12:50] <juxta> next time :)
[12:50] <rharrison> Fantastic vidio though
[12:50] <rharrison> Video
[12:50] <juxta> cheers!
[12:51] <rharrison> AU is definitly the place for HAB how is your NOTAM
[12:51] <rharrison> Do you have an open ended agreement in place
[12:52] <juxta> I basically have a permit for a launch area
[12:53] <juxta> from there I just send them an email a few days in advance to let them know I want to launch and a NOTAM is organised
[12:54] <rharrison> Cool
[12:55] <rharrison> Did that cause a problem with the slight change if launch location or was that sliped in?
[12:56] <juxta> basically my permit says 'at or near location'
[12:56] <juxta> i only moved a few km so it wasnt an issue
[12:56] <rharrison> Cool ...
[12:58] <juxta> it's not too bad, it just took a while to get it all in place
[13:00] <juxta> they also told me in my paperwork that I need to ring ATC before I launch
[13:00] <juxta> everytime I do though ATC tell me not to bother them
[13:07] <fsphil> I've heard they do that here too
[13:08] <fsphil> rharrison, how goes the permanant notam? I've been pondering one here -- NI is pretty small so it could be useful for anyone else here who wanted to launch
[13:09] <rharrison> Yep well it's taken an age and I'v just sent them an email for a progress report
[13:09] <rharrison> Hopfully soon (*$&(*)^$(£"*& :)
[13:10] <fsphil> fingers crossed!
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[13:22] <DanielRichman> fsphil: do you think that locking the mutex, checking a variable, unlocking the mutex every single time we receive a char is going to be too much of a problem? I know it's inefficient and hacky...
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[13:24] <m1x10> heh, both
[13:24] <robint91> :p
[13:24] <spadusa> ;-)
[13:24] <spadusa> I see some familiar names in here.
[13:24] <m1x10> yeah
[13:24] <SpeedEvil> :)
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[13:32] <fsphil> DanielRichman, if it's only a char do you need to lock it?
[13:33] <DanielRichman> fsphil: to test if the flag has been set
[13:33] <DanielRichman> every char
[13:33] <fsphil> testing char should be atomic, two threads accessing it shouldn't cause any trouble
[13:33] <DanielRichman> http://github.com/danielrichman/dl-fldigi/blob/master/src/misc/dl_fldigi_gps.cxx scroll to 385
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[13:34] <DanielRichman> the flag is an int, and it wouldn't be atomic on a desktop what with processor caching, and loading memory into registers, etc.
[13:34] <fsphil> ack, multicore
[13:34] <fsphil> but no it shouldn't eat up that many cycles
[13:34] <DanielRichman> well even on a single core you'd have to load the variable into a register, and then test it
[13:34] <fsphil> afaik the thread stuff is pretty light
[13:35] <DanielRichman> ok, cool. Especially since most of the time it won't be locked, so it can go right ahead and take the lock
[13:35] <fsphil> yep
[13:35] <DanielRichman> windows is such a pile of trash >.>
[13:35] <fsphil> yep x2
[13:36] <DanielRichman> signals are cool, why wouldn't you have signals?
[13:36] <DanielRichman> +interrupted io
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[13:44] <SAIDias> how far out does the predictor work
[13:45] <DanielRichman> far out - time wise?
[13:46] <SAIDias> well it errors out when i go longer than a week
[13:46] <SAIDias> yeah
[13:47] <DanielRichman> right well the GFS data it uses only has wind data for now + 8 days
[13:47] <DanielRichman> ie there's only wind data for 8 days in the future.
[13:47] <SAIDias> oh ok, what is GFS HD?
[13:47] <DanielRichman> However in practice anything beyond 3 days isn't that accurate
[13:48] <DanielRichman> the normal wind data's "resolution" is a pair of values for every latitude and longitude
[13:48] <DanielRichman> with GFS HD it's every half-latitude and half-longitude degree
[13:48] <DanielRichman> ie. higher resolution data. It doesn't seem to affect the actual prediction that much and just means you have to wait longer to download more data
[13:49] <DanielRichman> s/to download/while the server downloads/
[13:49] <SAIDias> ahh ok
[13:49] <SAIDias> thx
[13:49] <DanielRichman> fsphil: it works :). Job done
[13:50] <DanielRichman> providing I haven't caused a regression in the linux version that's the end of that
[13:50] <DanielRichman> I don't have a mac so don't have to think about that one :)
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[13:52] <fsphil> fantastic
[13:52] <DanielRichman> it's hacky, ugly, and has virtually no documentation, but it works :D
[13:52] <DanielRichman> thank you for your help :)
[13:52] Nick change: SAIDias -> W0OTM
[14:00] <fsphil> np
[14:00] <fsphil> one other thing :)
[14:00] <fsphil> does dl-fldigi run at >100% cpu on your box?
[14:01] <fsphil> happens on both my machines but I haven't had much luck tracking down the cause. regular fldigi is fine
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[14:09] <DanielRichman> fsphil: htop might help
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[14:09] <DanielRichman> htop lets you see the cpu usage of diff. threads
[14:09] <DanielRichman> fsphil: fldigi will use 100% of my cpu if the audio isn't correctly configured
[14:10] <DanielRichman> however what you could try is starting fldigi in gdb, finding the offending thread with htop and sending that thread a sigsegv
[14:10] <DanielRichman> gdb will then break in that thread
[14:10] <DanielRichman> so you can see which one it was
[14:11] <DanielRichman> (using the bt command)
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[14:19] <fsphil> aah
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[14:34] <fsphil> yes it's the audio thread
[14:35] <DanielRichman> does the audio still work?
[14:35] <fsphil> it does
[14:39] <fsphil> looks like it's in pulseaudio itself
[14:41] <DanielRichman> eugh, pulseaudio
[14:41] <fsphil> indeed, that
[14:42] <DanielRichman> I tell my fldigi to use portaudio
[14:42] <fsphil> so do I, and that uses alsa ... but pulseaudio squeezes in between
[14:42] <DanielRichman> yuck
[15:03] <m1x10> ahh, now my payload supports a servo !
[15:03] <m1x10> I got many issues with servos and softwareserial libs, but sparkfun guys helped me.
[15:03] <m1x10> Some guy there reminded me of the mirror idea
[15:04] <m1x10> instead of moving the cam, move a mirror
[15:07] <SpeedEvil> yeah - that's cool.
[15:07] <SpeedEvil> I've got one in my design for UAV.
[15:07] <SpeedEvil> A little 2 axis tilt front surface mirror that serves the cam and a a laser ranger
[15:07] <m1x10> a mirror looking down, another one looking up and no mirrors for forward
[15:08] <SpeedEvil> Oh- right - you mean fixed mirrors
[15:08] <SpeedEvil> that works too
[15:08] <SpeedEvil> front surface mirrors are cheap on ebay
[15:09] <m1x10> I dont know what exactly i mean
[15:09] <m1x10> just a mirror
[15:09] <m1x10> what means fixed?
[15:09] <SpeedEvil> A non-moving mirror
[15:09] <m1x10> aa
[15:09] <m1x10> you suppose one mirror turning it up/down ?
[15:09] <SpeedEvil> Front surface means that the reflector is on the front, not the back of the glass
[15:10] <SpeedEvil> This improves optical quality
[15:10] <m1x10> hmm can you show me a linnnk?
[15:10] <SpeedEvil> FOr what?
[15:10] <m1x10> that mirrot
[15:10] <m1x10> lol
[15:10] <SpeedEvil> ah
[15:10] <m1x10> brb! Toilet !
[15:10] <SpeedEvil> http://cgi.ebay.co.uk/First-Front-Surface-Mirror-mil-spec-38x40mm-laser-optic-/280554073891?pt=LH_DefaultDomain_3&hash=item4152536f23
[15:11] <SpeedEvil> http://cgi.ebay.co.uk/20-PCS-10-FRONT-SURFACE-DENTAL-MIRRORS-4-10-HANDLES-/180555854710?pt=LH_DefaultDomain_0&hash=item2a09f7b376
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[15:18] <m1x10> back
[15:18] <m1x10> dental lol
[15:22] <m1x10> I found this: http://www.servocity.com/html/spt200_pan___tilt_system.html
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[15:35] <m1x10> can anyone show me his tilt system ?
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[15:43] <timbobel> you show me your tilt systen ;-)
[15:43] <timbobel> naughty boy
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[15:48] Nick change: m1x10 -> m1x10_afk
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[15:53] <kolonelknakworst> test\ this is timbobel
[15:53] <timbobel> oh hi tim
[15:53] <timbobel> hows things
[15:53] <kolonelknakworst> oh good
[15:53] <kolonelknakworst> i saw your hohoho 1 the other day
[15:53] <kolonelknakworst> it was amazing
[15:53] <timbobel> i know i think so too
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[15:53] <timbobel> so you like your new mac
[15:54] <kolonelknakworst> no mac sucks i like pc
[15:54] <timbobel> right ill be getting a coffee
[15:54] <kolonelknakworst> yeah me too
[15:54] <timbobel> letes go
[15:54] <kolonelknakworst> k
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[15:55] <Timbobel-mac> test
[15:55] <timbobel> tet
[15:55] <timbobel> test
[15:55] <Timbobel-mac> k
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[15:59] <natrium42> failed
[15:59] <timbobel> hey natrium
[15:59] <timbobel> are you here?
[15:59] <natrium42> nope
[16:00] <natrium42> i am only an illusion
[16:00] <natrium42> i am really in a galaxy millions of light years away
[16:00] <timbobel> do you know that your project is being used every year with the 1st year student course here with aerospace at the TU Delft
[16:00] <DanielRichman> He's predicted what you would say and actually sent those message millions of years ago >.>
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[16:00] <natrium42> really? used how?
[16:01] <timbobel> ehmm well this year i kinda knocked you off your chair since i'm at the TU Delft
[16:01] <timbobel> but i can show you what they did this year
[16:01] <natrium42> hehe
[16:01] <timbobel> how can i send an avi
[16:01] <timbobel> 6.7mb
[16:01] <DanielRichman> youtube.com
[16:01] <timbobel> argh allright
[16:03] <timbobel> okay so its on youtube
[16:04] <timbobel> http://www.youtube.com/watch?v=EJ0oaFkR8LA
[16:05] <timbobel> excuse his english
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[16:06] <natrium42> cool, thanks for sharing :)
[16:06] <timbobel> np
[16:07] <natrium42> what course is it?
[16:07] <timbobel> # AE1101 Introduction to Aerospace Engineering I (2010-2011 Q1)
[16:07] <natrium42> ah
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[16:55] <griffonbot> @nearsys: The video clip will be a short introduction to the BalloonSat Extreme. #ARHAB [http://twitter.com/nearsys/status/22814228423]
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[18:39] <natrium42> smeaway's tubes are clogged
[18:39] <m1x10> Ok, I finished some first tilt system. I touched the cam lens and now there is a fingerprint left. How can I clean it?
[18:39] <natrium42> lens cleaning pen?
[18:39] <m1x10> dunno
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[18:39] <natrium42> that's what i use
[18:40] <m1x10> ok
[18:40] <natrium42> http://www.jessops.com/ce-images/PRODUCT/PRODUCT_ENLARGED/AJESSGA101019406.JPG
[18:40] <m1x10> nie
[18:40] <m1x10> nice
[18:40] <m1x10> thats what Im looking I believe
[18:40] <m1x10> I will go to a photo shop tomorrow to ask
[18:40] <natrium42> you can get it at a photography store
[18:40] <m1x10> yeah
[18:41] <natrium42> brb, food
[18:41] <m1x10> natrium42 want to see my noob tilt system?
[18:42] <fsphil> careful how you type that :)
[18:42] <m1x10> ?
[18:43] <m1x10> fsphil: http://imagebin.org/112418
[18:43] <fsphil> I'm not sure what I'm looking at
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[18:44] <m1x10> lol
[18:44] <fsphil> aaah
[18:44] <fsphil> gotcha
[18:44] <m1x10> its the servo attached to sparkfun box which contains the cam
[18:45] <m1x10> brb, food
[18:47] Action: fsphil had pizza
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[19:00] <natrium42> ghetto ftw
[19:06] <m1x10> back
[19:06] <m1x10> ftw?
[19:06] <m1x10> natrium42 did u see my tilt?
[19:07] <natrium42> yeah, hence the comment :)
[19:07] <m1x10> is it ok?
[19:08] <m1x10> any drawbacks?
[19:08] <natrium42> did you fill the cardboard box with anything?
[19:08] <m1x10> yeah
[19:08] <m1x10> camera is tight
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[19:08] <natrium42> styro?
[19:08] <m1x10> no
[19:08] <m1x10> some paper that came with sparkfun orders
[19:09] <m1x10> camera is not moving
[19:09] <m1x10> I moved it with some strength and its firmly standing there
[19:09] <natrium42> i'd use something more insulating than paper
[19:09] <natrium42> so the servo is attached just to the box?
[19:10] <m1x10> I used the paper for firm. why insulate it?
[19:10] <m1x10> yes directly with screws
[19:10] <natrium42> hrm
[19:10] <natrium42> sounds a bit dodgy
[19:10] <m1x10> heh
[19:10] <natrium42> there might be some humidity in the air
[19:10] <m1x10> Its just a first thought
[19:10] <natrium42> and cardboard might deform
[19:10] <m1x10> hmm
[19:11] <m1x10> so better use styro to keep it there
[19:11] <m1x10> ?
[19:11] <natrium42> think so
[19:12] <m1x10> k
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[19:12] <natrium42> also, i guess you could use some piece of pcb on the inside attached to the screws
[19:13] <m1x10> hmm, yeah
[19:13] <m1x10> if its going to deform screws will fall
[19:13] <natrium42> oh, also
[19:14] <m1x10> good point
[19:14] <natrium42> i broke the lens on one flight, since the tilt camera was not protected by anything
[19:14] <natrium42> next flight i added "pillars" of styrofoam
[19:14] <natrium42> so that they protect the tilting camera
[19:15] <m1x10> see
[19:16] <m1x10> I dont believe that a servo is moving such a weight
[19:16] <natrium42> hehe
[19:16] <m1x10> does it use much current?
[19:17] <natrium42> btw, you could remove the grease from the servo gears if you plan to live it exposed
[19:17] <natrium42> current should be specified on the box
[19:17] <natrium42> *leave
[19:17] <m1x10> grease?
[19:18] <natrium42> yep, the lubrication inside
[19:18] <natrium42> as it might freeze
[19:18] <natrium42> i didn't remove it in mine, but it was kinda protected by styrofoam
[19:18] <natrium42> and it was moving throughout the flight, so it probably kept warm
[19:18] <m1x10> how to remove the grease?
[19:19] <fsphil> we believe the grease froze in our camera lens on cirrus, it stopped taking pictures about 15km up
[19:19] <natrium42> just open the servo, remove the gears and wash them
[19:19] <m1x10> loool
[19:19] <m1x10> and its working make noise then?
[19:19] <natrium42> it should work fine
[19:20] <m1x10> now it makes noise
[19:20] <m1x10> if i remove it it will do more ?
[19:20] <natrium42> are you recording sound?
[19:20] <m1x10> no
[19:20] <m1x10> haha
[19:20] <natrium42> so? :P
[19:21] <natrium42> "what does the earth sound like at 35km?"
[19:21] <m1x10> I think I will cover the box with space blanket
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[19:41] <natrium42> shalom DanielRichman
[19:41] <DanielRichman> say what?
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[19:44] <natrium42> hi
[19:44] <DanielRichman> hi
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[20:00] <Laurenceb> hi
[20:02] <m1x10> hi
[20:02] <SpeedEvil> hi
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[20:53] <natrium42> lol #sparkfun is talking about hermaphroditic jumper cables
[20:53] <DanielRichman> ...
[20:53] <DanielRichman> fair point
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[00:00] --- Fri Sep 3 2010