highaltitude.log.20100518

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[08:00] <earthshine> morning
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[09:39] <russss> http://spacebits.eu/
[09:40] <GW8RAK> Nice looking website
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[09:48] <DanielRichman> http://spacebits.eu/page/power.html they're flying a lot of batteries
[09:48] <GW8RAK> Does the foil covering actually reflect internal heat back into the electronics?
[09:49] <GW8RAK> Is that why people cover theire in duct tape?
[09:49] <GW8RAK> There's also a lot of electronics.
[09:50] <DanielRichman> hmm they're using XBee for the radio link
[09:50] <DanielRichman> is that legal?
[09:51] <GW8RAK> I was just looking for the power output but can't find it. It may be legal in Portugal. Certainly some European countries allow amateurs to "fly" radios.
[09:52] <GW8RAK> 500mW output.
[09:58] <DanielRichman> Oooh our NiM2 is on the way!!
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[10:20] <jonsowman> DanielRichman: :)
[10:20] <DanielRichman> jonsowman, have you started playing with yours yet?
[10:20] <jonsowman> unfortunately not, end of year exams soon!
[10:20] <jonsowman> busy revising and all that
[10:21] <DanielRichman> My desk is covered in RS (eww) notes currently; it's the same situation here
[10:21] <jonsowman> modulator/demodulator for the uplink is designed and the pcbs are designed
[10:21] <jonsowman> getting them fab'd soon and then populate and test it after exams
[10:22] <jonsowman> ionising radiation detector PCB done as well :)
[10:22] <GW8RAK> What mode are you using for the uplink?
[10:23] <jonsowman> OOK
[10:23] <jonsowman> we've got a fairly "modular" modem design so we can test a few ideas
[10:23] <jonsowman> but basically, OOK
[10:23] <GW8RAK> I was wondering what the was, so googled it, on off keying.
[10:23] <jonsowman> that's the one
[10:24] <rharrison> ping Randomskk
[10:24] <Randomskk> hi
[10:25] <jonsowman> we're looking at sending tones instead of a pure carrier to help the data slicer on the reciever
[10:25] <rharrison> Waht do you know about the hourly pred
[10:25] <Randomskk> a few bits and pieces, what do you need to know?
[10:25] <rharrison> I pulled the svn this morning an ran the automatic.out script
[10:25] <DanielRichman> jonsowman, what about the downlink? just pure rtty still?
[10:26] <rharrison> Randomskk, one sec
[10:26] <jonsowman> DanielRichman: yep, running at both 50 and 300 baud
[10:26] <rharrison> Just getting the error
[10:26] <DanielRichman> jonsowman, so with OOK you going to be just reading the SSI pin?
[10:27] <jonsowman> read the SSI, if it's higher than threshold, tone decode the signal to make sure it's not noise
[10:27] <jonsowman> hence sending a tone instead of pure carrier
[10:27] <rharrison> Error: forecast unavailable for that time
[10:27] <jonsowman> that's one idea. otherwise we could just straight integrate the RSSI over a bit period and discriminate
[10:27] <rharrison> Just wondered if you had seen anything like this#
[10:29] <Randomskk> did you run the python get grib script
[10:29] <rharrison> no :)
[10:30] <rharrison> is it in that dir
[10:30] <rharrison> ir somwhere else
[10:30] <Randomskk> should be in there
[10:30] <Randomskk> somewhere
[10:30] <rharrison> There is some cpp get_grib stuff in there
[10:30] <Randomskk> wait svn?
[10:30] <Randomskk> latest pred stuff is on git
[10:30] <rharrison> ah
[10:30] <rharrison> right
[10:31] <rharrison> do you have a url
[10:31] <Randomskk> http://github.com/rjw57/cusf-landing-prediction
[10:32] <Randomskk> http://github.com/rjw57/cusf-landing-prediction-web
[10:32] <rharrison> Thanks
[10:32] <rharrison> I'll play again
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[11:07] <GW8RAK> Does anyone have an audio recording, wav file, I could put on the website please?
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[11:37] <DanielRichman> GW8RAK, what of?
[11:38] <GW8RAK> Of a typical downlink.
[11:38] <GW8RAK> I want to make sure that cadet listeners can identify what they are listening for.
[11:38] <GW8RAK> In other words, RTTY Ascii at 50 baud
[11:44] <DanielRichman> there is some on the Wiki
[11:44] <DanielRichman> or you can have fldigi generate some with file->audio->tx capture
[11:45] <DanielRichman> http://ukhas.org.uk/guides:tracking_guide#background
[11:53] <GW8RAK> Thanks Daniel. I was looking on that page expecting an example, but just couldn't see it.
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[12:26] <rharrison> Randomskk, do you edit the json file to change the pred
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[13:30] <jonsowman> rharrison: yes
[13:31] <rharrison> jonsowman, thanks
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[17:22] <rharrison> Randomskk, humm every thing looks cool other than changing the scenario any hint's I have changed 2 json files one in scripts and one in hourly-predictions am I missing something ?
[17:23] <Randomskk> what's going wrong?
[17:23] <rharrison> Well the senario is 27000 alt
[17:23] <Randomskk> the thing is basically black magic it seems but I can make some slightly educated guesses and c.f. to our setup
[17:23] <jonsowman> is the pred just not changing?
[17:23] <rharrison> Yep
[17:23] <Randomskk> actually I can't c.f. to our setup for the time being as I'm on Windows but jon can :P
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[17:24] <jonsowman> hang on
[17:25] <jonsowman> rharrison: the template in /public_html/hourly-predictions/ is the one you need to change
[17:25] <rharrison> ok
[17:25] <rharrison> one sec
[17:25] <jonsowman> are you running the preds manually or under cron?
[17:26] <Randomskk> jonsowman: bear in mind it's only in that directory for the cusf install
[17:26] <Randomskk> aiui rharrison is running his own
[17:26] <jonsowman> yeh i know, but it's the one in the hourly-predictions dir that matters it seems
[17:26] <Randomskk> right, yea
[17:26] <jonsowman> not the one in /scripts
[17:26] <rharrison> Yep that sounds good
[17:27] <rharrison> scenario-template.json this file?
[17:27] <jonsowman> that's the one
[17:27] <rharrison> Humm
[17:28] <jonsowman> are you just manually running the predictor by calling the cronjob bash script?
[17:28] <jonsowman> Randomskk: rjw never got back to us about fixing the forcing-update and it dying issue did he?
[17:29] <Randomskk> don't believe so
[17:29] <jonsowman> hmm
[17:29] <Randomskk> theoretically if cron isn't running anyway running the thing manually should work fine
[17:29] <jonsowman> do we still reckon it only screws up if calling the script clashes with cron
[17:29] <jonsowman> ?
[17:30] <jonsowman> i can't remember where we got to on this
[17:30] <Randomskk> also user permissions
[17:30] <jonsowman> oh yes
[17:30] <Randomskk> since cron was as rjw
[17:30] <jonsowman> hmm yeh
[17:30] <jonsowman> we want it on cusf crontab really
[17:30] <Randomskk> yea, just that's awkward
[17:30] <Randomskk> but can be set up fairly easily
[17:30] <rharrison> anyone fancy a quick look
[17:30] <rharrison> I'm going to have to dash to get the kids
[17:31] <jonsowman> Randomskk: you're better at this than I am :P
[17:31] <jonsowman> mind you, black magic
[17:31] <Randomskk> I can have a poke in a couple of minutes
[17:31] <Randomskk> or theoretically now actuall
[17:31] <Randomskk> actually*
[17:31] <rharrison> www.robertharrison.org
[17:31] <rharrison> root
[17:31] <rharrison> and the passwd is
[17:32] <jonsowman> nobody really understands it apart from rich and nobody can seem to get in touch with him
[17:32] <rharrison> so much for security
[17:32] <Randomskk> :P
[17:33] <Randomskk> rich has vanished leaving behind just a few comments in code
[17:33] <rharrison> It all under /var/www/html/predict
[17:33] <rharrison> it is
[17:33] <Randomskk> got it
[17:33] <jonsowman> right
[17:34] <rharrison> http://www.robertharrison.org/predict/web/hourly-predictions/
[17:34] <rharrison> Looks like this at the moment
[17:34] <jonsowman> Randomskk: looks very like a cron/direct call clash?
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[17:35] <rharrison> there is nothing in cron yet
[17:35] <Randomskk> yea, crontab's empty
[17:35] <jonsowman> yeh
[17:35] <Randomskk> can't imagine it's a cront class :P
[17:35] <Randomskk> hmm
[17:35] <rharrison> At least I don't think so
[17:35] <rharrison> All the grib data is downloaded
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[17:35] <rharrison> That's the long bit
[17:36] <Randomskk> jonsowman: check out /societies/cuspaceflight/git/cusf-srcf/hourly-predictions-cronjob.sh
[17:36] <jonsowman> oh does that need changing for rharrison's one
[17:36] <rharrison> The running of the hourly preds is quite quick perhaps 30 seconds
[17:37] <Randomskk> jonsowman: it's not on rharrison's one, but the same commands
[17:37] <rharrison> I have changed the scripts a bit to reflect the set up here
[17:37] <rharrison> At least we can play with this predicotr without having anyone complain
[17:37] <Randomskk> yea exactly
[17:38] <Randomskk> need to get this into a more readily deployable form
[17:38] <rharrison> I'm hoping to set it up for my York location
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[17:38] <Randomskk> I'll be doing it over the summer if rjw is still busy
[17:38] <jonsowman> Randomskk: really do
[17:38] <rharrison> Right I have to pick up my daughter from school so must dsah
[17:38] <rharrison> dash
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[17:40] <jonsowman> hmm this is weird
[17:40] <jonsowman> looks like it should work
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[17:41] <Randomskk> question is where python is putting the output
[17:45] <Randomskk> hmm
[17:45] <Randomskk> it worked
[17:45] <jonsowman> it did?
[17:45] <jonsowman> what did?
[17:46] <jonsowman> Randomskk: i just ran the cronjob after fixing a typo in the .sh
[17:47] <Randomskk> hmm
[17:47] <Randomskk> that might be it
[17:47] <Randomskk> I was just running the cronjob bash script
[17:47] <jonsowman> same
[17:47] <Randomskk> lol
[17:47] <Randomskk> well anyway
[17:47] <jonsowman> was a missing / in the .sh script
[17:47] <Randomskk> that's it by the looks of things
[17:47] <Randomskk> ah
[17:48] <Randomskk> it seems to work otherwise
[17:48] <jonsowman> can we get the map to centre on launch site on load
[17:48] <Randomskk> just need that put into cron
[17:48] <Randomskk> oh, probably
[17:48] <jonsowman> yeh
[17:48] <Randomskk> it'l be in index.html somewhere or one of the js files
[17:48] <Randomskk> hmm
[17:48] <Randomskk> yea
[17:48] <Randomskk> in hourly.js
[17:48] <Randomskk> line 3
[17:49] <Randomskk> that 52,0
[17:49] <jonsowman> you changing it
[17:49] <jonsowman> or shall i?
[17:49] <jonsowman> i dont like Centos
[17:50] <jonsowman> 54,-1 will be about right
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[17:51] <Randomskk> dinner?
[17:51] <jonsowman> nice one
[17:51] <jonsowman> yes, 2 secs
[17:52] <jonsowman> just sent rob an email saying it's working
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[17:53] <jonsowman> did you put it under cron?
[17:54] <jonsowman> done
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[19:35] <jcoxon> evening al
[19:35] <jcoxon> l
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[19:50] <fsphil> g'day
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[19:51] <jcoxon> hey fsphil i've added bearing and distance to fldigi to make your life easier :-)
[19:52] <fsphil> Was just testing it ;-)
[19:52] <jcoxon> works?
[19:52] <fsphil> if the string is fine, gets a little bonkers if there is bad data
[19:53] <fsphil> might be wise only to display if the checksum passes
[19:53] <fsphil> hmmm.. wait it might not be working
[19:53] <jcoxon> yeah
[19:53] <jcoxon> it was a very rough hack
[19:53] <fsphil> I'm testing it on alien-1 data
[19:55] <fsphil> ah my fault, I keep forgetting my longitude is negative
[20:00] <jcoxon> does that break it?
[20:00] <fsphil> nah, just makes it give the wrong answer
[20:00] <jcoxon> oh
[20:00] <fsphil> I was wondering why it was getting closer -- alien-1 went away from me
[20:01] <fsphil> hmm.. though it should get further from a listener in the north sea too
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[20:15] <rjharrison> Randomskk, jonsowman how did it go
[20:15] <rjharrison> Got 5 mins b4 getting the kids out of the bath
[20:16] <rjharrison> Hey you clever sods you've done it
[20:20] <rjharrison> Any pointeres to where I was going wrong.
[20:21] <rjharrison> I guess it may have been a path issue and the results were based on defaults
[20:26] <Randomskk> hi rjharrison
[20:27] <Randomskk> mostly typo in the bash script run-hourly-cronjobs.sh
[20:27] <Randomskk> jon set up a cron job to run that automatically for you
[20:27] <Randomskk> missing a trailing / says jon
[20:27] <Randomskk> was a path issue
[20:34] <fsphil> jcoxon, yea it's working fine -- do you want me to add a checksum tester? only update the HAB interface on it passing? or would even the possibly-bad data still be useful to someone?
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[20:40] <jcoxon> fsphil, yeah that would be great
[20:41] <jcoxon> well jsut use the checksum for the display
[20:41] <fsphil> yea
[20:41] <jcoxon> we can still send the data
[20:41] <fsphil> it'll still upload them
[20:43] <jcoxon> yeah
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[21:08] <rjharrison> fsphil, jcoxon_ that's cool
[21:09] <rjharrison> It's always worth getting the data at the server end if possible.
[21:10] <jonsowman> rjharrison: might be an idea to only make the predict/web/ directory web accessible
[21:12] <Randomskk> move the entire tree outside of your public html folder and just use apache to have /hourly go to that directory
[21:12] <Randomskk> if it were me
[21:13] <rjharrison> yep but it was a fun place to put it at first
[21:13] <Randomskk> yea
[21:13] <rjharrison> it's a good point
[21:13] <rjharrison> thanks for fixing what was the problem
[21:15] <rjharrison> oh I see above
[21:15] <rjharrison> Randomskk, jonsowman a big thankyou for sorting it
[21:16] <Randomskk> jonsowman actually fixed it :P
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[21:16] <Randomskk> I wonder if it still segfaults on my desktop when doing a kml
[21:16] <Lunar_Lander> hello
[21:16] <Randomskk> hmm
[21:16] <Randomskk> yo Lunar_Lander
[21:16] Action: rjharrison nods to jonsowman
[21:16] <Lunar_Lander> how's life?
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[21:45] <Lunar_Lander> hello RocketBoy!
[21:45] <Lunar_Lander> great to see you
[21:45] <Lunar_Lander> did you receive my E-Mail with the actual order?
[21:45] <fsphil> quicky C++ question -- when I pass a string to a function, is it copied?
[21:46] <SpeedEvil> Generally not.
[21:46] <SpeedEvil> You'd pass a pointer to the string
[21:46] <SpeedEvil> rather than the string itself.
[21:46] <Randomskk> <string> String or a char*
[21:46] <fsphil> this is a C++ string
[21:46] <fsphil> <string>
[21:47] <fsphil> a regular C string I understand
[21:47] <fsphil> not sure about the string object
[21:48] <Randomskk> hmm
[21:48] <Randomskk> looks like it may be copied
[21:48] <Randomskk> or perhaps not, what.
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[21:49] <Randomskk> if I print a pointer to a string object after making it I get one value, after passing the string to a function that function prints a pointer to what it has and it's 16 bytes different, no matter the length of the string
[21:50] <Randomskk> it is copied
[21:50] <fsphil> thanks
[21:50] <Randomskk> pass a pointer to your string object to pass by reference
[21:50] <fsphil> makes sense, in an odd c++ kind of way
[21:51] <Randomskk> yes
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[22:03] <rjharrison> ping RocketBoy
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[22:17] <rjharrison> Hi edmoore
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[22:41] <Lunar_Lander> is there a HAB "song"?
[22:41] <Lunar_Lander> any song that matches HAB
[22:41] <jonsowman> 99 red balloons
[22:41] <jonsowman> ?
[22:41] <Lunar_Lander> yeah good idea :)
[22:42] <Lunar_Lander> I'd also add this one: http://www.youtube.com/watch?v=mw_ZBbeTTRI
[22:42] <rjharrison> up up and away
[22:42] <fsphil> http://www.youtube.com/watch?v=iWVe3AB8OY8
[22:43] <rjharrison> http://www.youtube.com/watch?v=5akEgsZSfhg
[22:44] <fsphil> snap
[22:44] <rjharrison> heh
[22:44] <rjharrison> e
[22:44] <fsphil> or a little more modern: http://www.youtube.com/watch?v=QvmGbkYDWz4 ;-)
[22:46] <rjharrison> wow that is modern
[22:46] <rjharrison> I'm getting old
[22:47] Action: SpeedEvil preferred the german version.
[22:47] Action: jonsowman agrees with SpeedEvil
[22:47] <SpeedEvil> (of Nena - not prodigy)
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[22:48] <rjharrison> ping edmoore
[22:48] <edmoore> hi
[22:48] <edmoore> but only briefly
[22:48] <edmoore> infact < 20 secs
[22:48] <rjharrison> pm
[22:48] <rjharrison> 15 secs rem
[22:48] <edmoore> yes
[22:48] <rjharrison> cool
[22:48] <SpeedEvil> Prodigy is _nasty_ music if you decide you're going to do manual labour to it.
[22:49] <fsphil> uh-oh, edmoore is gonna self destruct in 15 seconds
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[22:49] <SpeedEvil> Or 6.
[22:49] <fsphil> I've never seen that video before -- pretty weird even by the prodigy standards
[22:51] <rjharrison> http://www.youtube.com/watch?v=9zYeGXcNl2k&feature=related
[22:52] <rjharrison> Is this the state of things to come :|
[22:56] <fsphil> lol
[22:56] <fsphil> nah
[22:56] <fsphil> possibly much worse
[22:57] <SpeedEvil> On the less-credible side - Westlife - Flying without wings.
[23:00] <rjharrison> this is more my era http://www.youtube.com/watch?v=DfSYUPIWLOU
[23:00] <rjharrison> Lunar_Lander look what you started
[23:00] <Lunar_Lander> oh
[23:01] <rjharrison> A balloon to the moon would be most cool thought
[23:02] <rjharrison> A balloon to the moon would be most cool though
[23:04] <fsphil> good tune
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[23:53] <SpeedEvil> Laurenceb: Any thoughts as to where I might find something to analyse jpegs to do a 2d spectrum on them?
[23:53] <SpeedEvil> Laurenceb: I'm idly wondering about the resolving power of my phone camera.
[23:53] <Laurenceb> octave
[23:53] <SpeedEvil> hmm
[23:53] <Laurenceb> has tools for image import
[23:54] <SpeedEvil> I should really learn octave at some point.
[23:54] <Laurenceb> bsically you get a big matrix of color values
[23:54] <Laurenceb> then you can juts fft(matrix)
[23:55] <Laurenceb> and plot or whatever
[23:55] Action: Laurenceb is trying to get non square pads in eagle
[23:55] <SpeedEvil> Or I could just stop being so damn lazy, find a suitable bar target, and take pics of it at different ranges and angles :)
[23:55] <Laurenceb> and failing... :/
[23:56] <SpeedEvil> Today I've been sifting gravel. http://qkwv.com/path.jpg
[23:56] <SpeedEvil> Lift ~8cm of mixed soil and gravel, sift, put membrane down, and 5cm of gravel.
[23:56] <Laurenceb> looks good
[23:56] <SpeedEvil> Also cleaning the unpumpable residue out of the bottom of the pond.
[23:56] Action: Laurenceb has been walling - need to take some photos :P
[23:57] <SpeedEvil> Lifting 20 buckets at full stretch is tiring.
[23:57] <Laurenceb> see you have a stone retaining wall too :D
[23:57] <SpeedEvil> And I'm at about 10% done
[23:57] <SpeedEvil> lots of the buggers.
[23:58] <Laurenceb> drystone walling is a pain - all the annoyance of pcb routing but everything is stupidly heavy
[00:00] --- Wed May 19 2010