highaltitude.log.20090512

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[00:36] <Laurenceb> http://imagebin.org/48718
[00:36] <herabot> Imagebin - A place to slap up your images.
[00:36] <Laurenceb> thats the velocity noise freuquency distribution
[00:36] <Laurenceb> pretty close to pink
[00:36] <Laurenceb> the peaks are due to the harmonics of my footsteps
[00:37] <Laurenceb> need to change it into proper units
[00:39] <SpeedEvil> over what time?
[00:43] <Laurenceb> x=0 > dc, rhs of x axis =2 Hz
[00:43] <Laurenceb> over a few hundered seconds
[00:43] <SpeedEvil> oh - that[s not static
[00:44] <Laurenceb> its an fft
[00:45] <SpeedEvil> yes, I know - but a fft of a moving GPS doesn't tell you much about the GPS
[00:45] <SpeedEvil> unless hte movement is very well known
[00:46] <Laurenceb> it was a straight line
[00:46] <SpeedEvil> ah
[00:48] <Laurenceb> noise starts to pick up around 4 second or so perios
[00:48] <Laurenceb> but that could all be me
[00:48] <Laurenceb> notice the exponential decay doesnt reach the x axis
[00:53] <Laurenceb> of order 0.2m/s/rootHz
[00:53] <Laurenceb> actually that sounds sensible more or less
[00:54] <Laurenceb> maybe its pink noise from my walking and white noise from the gps
[00:54] <SpeedEvil> stick it somewhere with a good sky view for 24h IME.
[00:54] <SpeedEvil> works well
[00:56] <Laurenceb> it may well go into a stationary mode
[00:56] <SpeedEvil> hmm
[00:56] <SpeedEvil> true I suppose
[00:56] <SpeedEvil> not something I saw with the gps12, but that was a while ago now
[01:01] <Laurenceb> ok... I need to do this properly
[01:01] <Laurenceb> but
[01:01] <Laurenceb> it looks like low pass filter then differentiate the gps vel will give you useful wind accel error estimates for an imu
[01:02] <Laurenceb> its using the 2g airborne mode presently
[01:02] <Laurenceb> I think it would work better on 1g - tighter pll
[01:04] <Laurenceb> youd correct the imu accel reading firstly with the pitot tube and gyro data for centripetal, and then by projecting a low pass filtered gps accel vector onto the wind direction vector
[01:04] <SpeedEvil> sounds plausible.
[01:05] <Laurenceb> the accel would hopefully be correct to a few degrees even in turns/gusty weather
[01:05] <Laurenceb> gusts are usually <<1Hz
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[01:09] <Laurenceb> working it out properly I get 0.28m/s/sqrt_HZ
[01:09] <Laurenceb> as the spectral noise density
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[01:32] <natrium42> Laurenceb, i am scared
[01:32] <natrium42> btw, ouch --> http://www.surfingsatellites.org/FlightReports/SurfsUp4.wmv
[01:32] <natrium42> wind tore away the balloon as they were launching
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[01:35] <herabot> HTMLParseError: malformed start tag, at line 27, column 297 (file "/usr/lib/python2.6/HTMLParser.py", line 115, in error)
[01:35] <natrium42> ...
[01:35] <natrium42> somebody kick the bot
[01:35] <Laurenceb> hehe
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[01:44] <fuzzylugnuts> be nice to bots
[01:44] <fuzzylugnuts> I think I found a local balloon group besides the "spirit of knoxxville" folks.
[01:45] <fuzzylugnuts> http://www.groovin.net/ke4pjw/balloon/
[01:45] <herabot> HTMLParseError: malformed start tag, at line 738, column 10 (file "/usr/lib/python2.6/HTMLParser.py", line 115, in error)
[01:45] <natrium42> ...
[01:45] <natrium42> fuzzylugnuts, http://www.surfingsatellites.org/FlightReports/SurfsUp4.wmv
[01:45] <natrium42> ^ how not to launch in fast winds
[01:46] <fuzzylugnuts> this should be good.
[01:48] <fuzzylugnuts> bufffffffferinnnnnnnnnggg
[01:48] <Laurenceb> its a bit slow
[01:48] Action: Laurenceb watches http://www.youtube.com/watch?v=XZHJ6QHlBZI instead
[01:48] <herabot> YouTube - Health Reminder - Giant Number Three
[01:50] <fuzzylugnuts> HAHA. its like Rover form The Prisoner
[01:50] <herabot> HTMLParseError: malformed start tag, at line 27, column 297 (file "/usr/lib/python2.6/HTMLParser.py", line 115, in error)
[01:51] <fuzzylugnuts> whoooooooooooooops
[01:51] <Laurenceb> the full video is crazier http://www.youtube.com/watch?v=9eqGl1JF-Bc
[01:51] <herabot> YouTube - Health Reminder
[01:52] <fuzzylugnuts> natrium42: I take it the launch was totally scrubbed for that day?
[01:57] <natrium42> fuzzylugnuts, yep
[01:58] <fuzzylugnuts> ah well. lesson learned
[01:59] <natrium42> they will know better the next time
[02:00] <fuzzylugnuts> Yaaaaaaaaaaaaaaaaaaaaaayyy.. the other local TN group uses hydrogen
[02:00] <natrium42> haha
[02:02] <fuzzylugnuts> my old group in idaho are launching on the 23rd
[02:02] <fuzzylugnuts> using the 8w trackers and the gumstix flight computer
[02:02] <fuzzylugnuts> I can't wait to hear how it goes
[02:13] <fuzzylugnuts> anyways
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[02:56] <stilldavid_> any electronics guys around to answer a computer scientist's questions?
[02:58] <stilldavid_> I'm trying to get my gps unit to work, and turns out that the signal line is rs-232 at ttl levels, and I need to invert it
[03:23] <SpeedEvil> to what connect
[03:25] <stilldavid_> well, I just built one of these: http://www.play-hookey.com/digital/experiments/ttl_inverter.html
[03:25] <herabot> TTL Inverter
[03:25] <stilldavid_> and it inverts the signal
[03:26] <stilldavid_> but the signal is only from 0v to about 2.2v or so, which is enough to communicate with my usb->ttl device, but not the level shifter from SFE
[03:27] <stilldavid_> I'm using 2n2222 transistors in place of the 2N4124's, and I was wondering if that was it.
[03:28] <stilldavid_> ack, nevermind. the output from the gps is -5v/5v rs-232
[03:38] <stilldavid_> phew, got it.
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[08:56] <rjharrison> Helium ordered
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[08:58] <rjharrison> Hi edmoore
[08:58] <edmoore> morning sir
[08:58] <rjharrison> Made my payload container last night
[08:58] <rjharrison> It's going to be a snug fit
[08:58] <edmoore> nice
[08:58] <rjharrison> what do you do for an antenna on badger?
[08:59] <rjharrison> Just a straight wire?
[08:59] <edmoore> 1/4 wave and radials
[08:59] <rjharrison> Like mine then
[08:59] <edmoore> not tried any j-poles or slim-jims yet
[08:59] <rjharrison> Oh my 70 cm is 1/4 wave
[09:00] <rjharrison> 2 radials not 4
[09:07] <rjharrison> http://www.robertharrison.org/images/icarus/beacon20080925/IMG_0019.JPG
[09:07] <rjharrison> Edmore the gp looks like this
[09:07] <herabot> HTMLParseError: malformed start tag, at line 23, column 672 (file "/usr/lib/python2.6/HTMLParser.py", line 115, in error)
[09:07] <rjharrison> WTF
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[14:48] <jcoxon> hmmm is herabot being a nuisance?
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[14:54] <Laurenceb> hi
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[15:07] <Jon_APEX> hi
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[15:50] <Laurenceb> weather looks interesting for saturaday
[15:50] <Laurenceb> we could get up crazxily high, maybe 35Km+
[15:50] <Laurenceb> landing near lincon, but we have to launch early
[15:54] <Laurenceb> jcoxon: ping
[15:55] <Tigga> right now looks like good weather actually...
[15:56] Action: Laurenceb noteces distinct lack of a payload
[15:56] <Laurenceb> or anything resembling one...
[15:56] <Laurenceb> my room is a tip :(
[15:56] <Laurenceb> tronics everywhere
[15:58] <jcoxon> Laurenceb, yeah the weather has shifted
[15:58] <jcoxon> the forecasts were a lot better yesterday
[16:00] <Laurenceb> ok it may shift asgain
[16:00] <Laurenceb> its ok at 9am
[16:01] <Laurenceb> I've got the receiver working on now
[16:01] <Laurenceb> theres ubx code on the wki :P
[16:01] <jcoxon> excellent
[16:01] <Laurenceb> my plan is to get it working on the i2c now
[16:01] <jcoxon> okay
[16:01] <jcoxon> yeah lets re-evaulate the weather a little bit later
[16:02] <jcoxon> it might go back to how it was
[16:02] <Laurenceb> i2c is a bit odd
[16:02] <Laurenceb> its buffered in the ublox
[16:03] <Laurenceb> not sure how to deal with that....
[16:04] <Laurenceb> guess it reduces overhead as you can just have a getgps function that retreaves from the buffer until it finds the packets its after
[16:07] <Laurenceb> whats the total mass?
[16:07] <Laurenceb> or payloads
[16:07] <Laurenceb> *of
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[16:12] <sbasuita> Hmm... you guys think herabot should keep grabbing html titles? Obviously needs some error catching. Might make it only do youtube/vimeo or something...
[16:14] <jcoxon> sbasuita, herabot was being quite a nusance last night on the channel
[16:14] <jcoxon> i don't think it needs to grab titles at all
[16:21] <sbasuita> Ok, it probably isn't as useful as I thought it would be
[16:22] <sbasuita> will turn off the auto url grab
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[16:25] <sbasuita> Note that you can still get your daily serving of htmlparse errors with .url ; )
[16:33] Nick change: kingj -> KingJ
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[16:55] <Laurenceb> whens alien launching?
[16:55] <sbasuita> Laurenceb, got exams next week
[16:55] <sbasuita> Laurenceb, maybe during half term?
[16:55] <Laurenceb> arggg
[16:55] <Laurenceb> good luck
[16:55] <sbasuita> thanks
[16:56] <Laurenceb> jcoxon: whats the mass of rjharrisons payload?
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[16:57] <jcoxon> Laurenceb, i'm not sure
[16:58] <Laurenceb> 700 grams?
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[17:07] <sbasuita> Btw, http://www.srcf.ucam.org/~jac208/pegasus/logs/ is 404, linked from http://www.ukhas.org.uk/links at the bottom
[17:08] <jcoxon> oh thats an old link
[17:08] <jcoxon> i'll fix that in a bit
[17:13] <DanielRichman> jcoxon, what I intend to do, since I've finished sorting out & coding the logging part of herabot, is to download all of zeus' logs, and then pilot it for a week, and see if the logs 'merge' and end up the same.
[17:13] <DanielRichman> sbasuita is still playing with the functions, but the logs is ready to go ish.
[17:13] <Laurenceb> right I'm off
[17:14] <DanielRichman> .g test
[17:14] <herabot> DanielRichman: http://www.test.com/
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[17:20] <jcoxon> DanielRichman, why would the logs be different?
[17:20] <DanielRichman> jcoxon, they'd be different If i'd ballsed something up somewhere
[17:20] <jcoxon> oh right
[17:20] <DanielRichman> jcoxon, out of curiosity, do you run pisg on the day, the month, the year, or all the stats in all time?
[17:21] <jcoxon> the logs aren't that important
[17:21] <jcoxon> i don't run it at all
[17:21] <jcoxon> unless you bug me to run it
[17:21] <DanielRichman> ah ;
[17:21] <DanielRichman> *;)
[17:21] <sbasuita> DanielRichman, how long does it take to run?
[17:21] <jcoxon> :-D
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[17:21] <DanielRichman> sbasuita, at the moment it's lightning fast
[17:21] <sbasuita> DanielRichman, so run it very often ;)
[17:22] <DanielRichman> sbasuita, haha.
[17:22] <DanielRichman> sbasuita, the same script that parses the IRC dump, converts the logs and uploads them runs pisg. SO perhaps daily
[17:22] <sbasuita> DanielRichman, nah, you want the logs uploaded very frequently
[17:22] <sbasuita> DanielRichman, like every 5 mins
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[17:24] <DanielRichman> sbasuita, $ wget -O - http://www.pegasushabproject.org.uk/zeusbot/ | egrep highaltitude\\.log\\.[0-9]+ -o | xargs -I {} wget http://www.pegasushabproject.org.uk/zeusbot/{}
[17:24] <sbasuita> DanielRichman, so...?
[17:25] <DanielRichman> sbasuita, let the downloading begin
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[17:28] <DanielRichman> jcoxon, http://www.pegasushabproject.org.uk/zeusbot/2008/feb/ linked from http://www.pegasushabproject.org.uk/zeusbot/2008/ returns bad things
[17:29] <jcoxon> oh ignore that
[17:30] <jcoxon> all the logs are there in the 2008 dir
[17:33] <jcoxon> seriously though i wouldn't spend to much time working on logging etc
[17:34] <jcoxon> the dynamics of the channel are more for people re-asking questions
[17:34] <jcoxon> as they often lead to newer responses
[17:53] <DanielRichman> jcoxon, For 2006, 2008 and 2009 all the logs are in the right directory and are indexed so it's ok... but for http://www.pegasushabproject.org.uk/zeusbot/2007/ there's nothing in there, and although you can't index http://www.pegasushabproject.org.uk/zeusbot/2007/may/ you can get to http://www.pegasushabproject.org.uk/zeusbot/2007/may/highaltitude.log.23May2007
[17:56] <jcoxon> ummm i lost most of the logs
[17:56] <jcoxon> in a server change
[18:03] <DanielRichman> jcoxon, but still, there's some logs in there I can't properly get out without bruteforce-trying every possible date in those subdirectories, because it won't list
[18:04] <DanielRichman> jcoxon, shall I do that?
[18:04] <jcoxon> no, i can access the dir
[18:04] <jcoxon> but not right now
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[18:37] <sbasuita> 0_0
[18:38] <sbasuita> http://en.wikipedia.org/wiki/Line_of_succession_to_the_British_throne
[18:39] <SpeedEvil> IIRC 190 random deaths, and a romance is all that stands between me and the united throne of UK and norway.
[18:40] <sbasuita> hehe
[18:43] <epictetus> nice!
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[20:47] <Jon_APEX> evening
[20:47] <sbasuita> evening
[20:51] <rjharrison> evening jiffe88
[20:51] <rjharrison> oops Jon_APEX
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[21:35] <sbasuita> : O
[21:35] <sbasuita> http://www.youtube.com/watch?v=96dWOEa4Djs&hd=1&feature=hd
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[22:03] <sbasuita> http://ircbot.richmanwebsite.co.uk/
[22:07] <natrium42> .kickbot
[22:07] <natrium42> .kick herabot
[22:07] Action: natrium42 fails
[22:09] <sbasuita> .val http://ircbot.richmanwebsite.co.uk/
[22:09] <herabot> sbasuita: http://ircbot.richmanwebsite.co.uk/ is Invalid (2 errors)
[22:09] <sbasuita> tut tut
[22:09] <sbasuita> night
[22:09] <sbasuita> ; )
[22:09] <natrium42> nite
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[22:41] <jcoxon> hey all
[22:50] <gordonjcp> hello
[22:51] <jcoxon> hey gordonjcp
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[23:00] <mjh29> hey guys
[23:01] <mjh29> any suggestions on where to find a high altitude balloon?
[23:02] <jcoxon> mjh29, as in get the balloon itself?
[23:02] <mjh29> jcoxon: yeah
[23:02] <jcoxon> in the US you can order them from Kaymount
[23:02] <jcoxon> .g kaymount balloons
[23:02] <herabot> jcoxon: http://blogs.sun.com/spotee/entry/spot_high_altitude_balloon_project
[23:02] <jcoxon> hmmm thats not the one i want :-)
[23:03] <jcoxon> .g kaymont balloons
[23:03] <herabot> jcoxon: http://www.kaymont.com/
[23:03] <jcoxon> there
[23:04] <mjh29> jcoxon: thanks
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[23:04] <Laurenceb_> hi
[23:05] <jcoxon> hey Laurenceb_
[23:05] <Laurenceb_> launch still ok?
[23:05] <jcoxon> the weather isn't looking good
[23:05] <Laurenceb_> hmm
[23:05] <jcoxon> going to keep an eye on it
[23:05] Action: Laurenceb_ loads of CU predictor
[23:05] <Laurenceb_> *up
[23:05] Nick change: Laurenceb_ -> Laurenceb
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[23:09] <Laurenceb> hmm morning looks ok
[23:11] <jcoxon> landing past nottingham?
[23:12] <Laurenceb> yeah
[23:13] <Laurenceb> or afternoon, near gratham
[23:13] <jcoxon> long way to chase Laurenceb
[23:13] <Laurenceb> *grantham
[23:13] <Laurenceb> at least its not in the sea
[23:13] <jcoxon> very true
[23:13] <Laurenceb> wonder if I can make it land on my house
[23:13] <jcoxon> and its in the right direction for rob
[23:15] <jcoxon> keep the day open and we can re-evaluate tomorrow
[23:15] <jcoxon> the GFS model is only 12Z
[23:16] <Laurenceb> k
[23:16] <Laurenceb> yeah I think its ok
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[23:47] <Laurenceb> ok I'll get to work
[23:47] <Laurenceb> using I2C to talk to the gps is annoying
[23:48] <Laurenceb> really need an rtos
[23:50] <SpeedEvil> why?
[23:50] <SpeedEvil> oh
[23:50] Action: SpeedEvil looks at the blinking light on his secondary DSL
[23:51] <Laurenceb> well
[23:52] <Laurenceb> there a buffer on the ublox
[23:52] <Laurenceb> you read out of the bufferusing i2c
[23:52] <Laurenceb> how do you do it efficiently ?
[23:52] <Laurenceb> I guess you could use a timer isr every 250ms
[23:53] <Laurenceb> but that leads to syncronisation issues
[23:53] <Laurenceb> perhaps a timer isr checks for data, if none it sets to timer to timeout in 2ms, otherwise 249ms
[23:54] <Laurenceb> if theres data it processes it and returns a pointer to the data
[23:54] <Laurenceb> hmm if theres a static gps type in the ISR, do I need to return a volatile gps type pointer?
[23:54] <Laurenceb> or does that just make the pointer volatile?
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[23:57] Nick change: KingJ -> kingj
[00:00] --- Wed May 13 2009