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[17:58] <Hiena> Good evening!
[17:59] <jcoxon> evening Hiena
[18:02] <Laurenceb_> hi guys
[18:03] <Laurenceb_> I've been doing aerosol flow tests
[18:05] <jcoxon> Laurenceb_, when are you planning to launch?
[18:05] <Laurenceb_> hopefully next week or maybe the week after
[18:05] <Laurenceb_> we were getting the flow testing kit up and running today, need to get some data tomorrow
[18:06] <Laurenceb_> but I also have to work on my report and get the radio working, so theres still a lot to do
[18:06] <jcoxon> is the gps working?
[18:06] <Laurenceb_> yes, had to short out the battery
[18:07] <Laurenceb_> then it got a lock ok i
[18:07] <jcoxon> cool
[18:07] <jcoxon> so are you launching from Oxford?
[18:07] <Laurenceb_> no ears
[18:07] <Laurenceb_> you couldnt launch here, too many flight paths
[18:07] <jcoxon> oh right, was about to say
[18:07] <jcoxon> i'm coming to oxford tomorrow
[18:07] <jcoxon> to see an old medic friend
[18:08] <Laurenceb_> cool
[18:08] <Laurenceb_> what time?
[18:08] <jcoxon> oh in the evening
[18:08] <Laurenceb_> ok
[18:09] <Laurenceb_> I was going to invite you round to the lab :P
[18:09] <Laurenceb_> ever used octave to do plots?
[18:10] <jcoxon> :-p, very kind, i've got surgery tomorrow so won't get out till quite late
[18:10] <Laurenceb_> we shut up at 5, and I get chucked out :(
[18:11] <Laurenceb_> I'm trying to do a contour plot of the aerosol particles per litre vs size and time.....
[18:11] <Laurenceb_> gnuplot?
[18:11] <jcoxon> oh i've never done anything like that
[18:11] <Laurenceb_> hmm maybe I can do it straight off with gnuplot
[18:11] <jcoxon> Laurenceb_ when would I? I pretend to treat sick people!
[18:12] <Laurenceb_> hehe
[18:13] <Laurenceb_> the "aerosol spectrometer" we were using is pretty cool, you can get particle number density for different size bins
[18:13] <Laurenceb_> it uses a laser beam and a camera, filming the particles in the beam
[18:15] <Laurenceb_> the we have an ultrasonic nebuliser to generate earosol
[18:16] <jcoxon> thats crazy
[18:16] <Laurenceb_> I've got a really cool flowmeter as well, it works by sucking bubbles down a tube
[18:17] <Laurenceb_> some crazy kit :P
[18:17] <Laurenceb_> then you time the bubble using IR lightgates
[18:18] <Laurenceb_> my setup is worth over £100000 !
[18:20] <Laurenceb_> we borrowed most of it from the Rutherford appleton laboratory in abingdon
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[18:22] <natrium42> hi
[18:22] <Laurenceb_> the problem is we want solid aerosol, so we use salt solution then a diffusion dryer to get solid particles, but the o rings on my diffusion dryer weren't sealing correctly
[18:22] <Laurenceb_> hey natrium
[18:23] <natrium42> could i borrow $175 000 from you?
[18:23] <natrium42> for --> http://cgi.ebay.ca/Contraves-Cinetheodolite-Missile-Tracking-Telescope_W0QQitemZ230227126224QQihZ013QQcategoryZ74930QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[18:24] <Laurenceb_> if its for acedemic use
[18:24] <Laurenceb_> of course
[18:24] <natrium42> uh... yes... yes it is :)
[18:24] <Laurenceb_> I will speak to the head of finance
[18:24] <natrium42> i have to track your balloon
[18:24] <Laurenceb_> </joking>
[18:24] <natrium42> to make sure it doesn't get lost if something fails
[18:25] <natrium42> :P
[18:25] <natrium42> but seriously, i am looking at a 11" celestron telescope
[18:25] <jcoxon> haha
[18:25] <natrium42> it's relatively cheap at $2800
[18:25] Action: Laurenceb_ cant be bothered to do any work
[18:25] <jcoxon> natrium42, http://www.roundsolutions.com/aarlogic/index.htm
[18:26] <jcoxon> check out the bottom board
[18:26] <natrium42> ok
[18:26] <natrium42> my internet is slow
[18:27] <jcoxon> they aren't stocking it yet but its going to be very cool
[18:27] <natrium42> yah, very nice?
[18:28] <natrium42> -?
[18:28] <natrium42> but why no gps?
[18:28] <natrium42> :P
[18:28] <jcoxon> yeah but you just stick it on with usb
[18:28] <jcoxon> or anything
[18:28] <jcoxon> no more stupid python scripts
[18:28] <jcoxon> just use embedded linux
[18:28] <natrium42> yay
[18:28] <Laurenceb_> will you get CMS ERROR 500 if there is no credit?
[18:28] <natrium42> :)
[18:28] <Laurenceb_> on your phone
[18:29] <natrium42> jcoxon, is it usb host?
[18:29] <Laurenceb_> jcoxon: I'm using a stupid python script on embedded linux :P
[18:30] <jcoxon> natrium42, i'm not sure
[18:30] <jcoxon> haven't read the datasheet
[18:33] <jcoxon> right i better be off
[18:33] <jcoxon> cya
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[18:33] Action: Laurenceb_ yawns and loads up a gnuplot tutorial
[18:33] <natrium42> plotting is serious busines
[18:34] <Laurenceb_> I need as contour plot....
[18:46] <Akadecca> nice, that aarlogic board has usb too
[18:46] <natrium42> is 3 deg/second a good slew rate for a telescope?
[18:46] <natrium42> i want to be able to follow satellites
[18:47] <Akadecca> seems like a lot
[18:48] <Akadecca> could cover the entire sky in a minute
[18:48] <natrium42> 180 deg in 60 seconds
[18:48] <natrium42> yeah
[18:48] <Akadecca> can't imagine any satelittle travelling that fast
[18:48] <Akadecca> Sate Little
[18:48] Nick change: Akadecca -> akawaka
[18:49] <natrium42> akawaka, what if the satellite is directly overhead?
[18:49] <akawaka> 3deg still seems like a lot
[18:50] <natrium42> http://www.telescopes.com/telescopes/catadioptric-telescopes/celestron11inchcpcschmidtcassegrainwithstarbrightxltcoatings.cfm
[18:50] <natrium42> that's the one i am looking at
[18:50] <akawaka> should be easy enough to convert that into meters at a specific altitude
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[19:51] <Laurenceb_> hey ed
[19:51] <edmoore> hi
[19:51] <edmoore> how's it going?
[19:52] <Laurenceb_> not so bad
[19:53] <Laurenceb_> been doing flow tests
[19:53] <Laurenceb_> just gnuplotting some data for my report
[19:54] <Laurenceb_> I'm writing a script to interface with my aerosol spectrometer and automatically plot the data :P
[19:55] <edmoore> yeah, they joy os scripts
[19:55] <Laurenceb_> spent the afternoon fiddling with lots of hoses to connect everything
[19:56] <Laurenceb_> then trying to get it all talking to the laptop running the experiement... it doesnt help that its all inside a fume cabinate
[19:57] <Laurenceb_> aerosol spectrometers are awsome things
[19:57] <Laurenceb_> as are nebulisers :P
[19:59] <Laurenceb_> I'm very pleased with how deranged my setup is, proper mad scientist look to it
[20:08] <akawaka> awesome
[20:08] <akawaka> what more can you ask for?
[20:09] <Laurenceb_> hehe
[20:10] <Laurenceb_> contour plots working in gnuplot?
[20:10] <edmoore> should do
[20:10] <Laurenceb_> they "work"
[20:11] <Laurenceb_> but theres odd corruption about the edges
[20:11] <Laurenceb_> theres jagged contours coming into the sides of my plot when all the data there is zero
[20:14] <Laurenceb_> oddly its symmetrical... a sort of wraparound problem
[20:16] Action: Laurenceb_ adds more zero padding
[20:18] <Laurenceb_> which seems to be helping, but its a pretty cr*p solution
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[20:21] <Laurenceb_> oh god now its gone utterly mad :(
[20:29] <Laurenceb_> Notice: Cannot contour non grid data. Please use "set dgrid3d".
[20:29] <Laurenceb_> I think when I use that command it screws everything
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[21:23] Nick change: Ebola_ -> Ebola
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[21:38] Action: Laurenceb_ is going slowly mad
[21:38] <Laurenceb_> http://imagebin.org/14637
[21:43] <Laurenceb_> I can only conclude that gnuplot is screwed
[21:43] <Laurenceb_> in which case so am I :(
[21:44] <edmoore> matlab = £50 to you sir
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[21:44] <Laurenceb_> ha
[21:44] <Laurenceb_> everyone uses gnuplot... I dont get it
[21:45] <Laurenceb_> I'd expect better than this
[21:46] <edmoore> It's probably not a problem explicitly with it
[21:46] <edmoore> but it is wierd
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[21:47] <Laurenceb_> those crazy features aren't anywhere in my data
[21:48] <Laurenceb_> its the evil eyes coming up over y=0 :P
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[00:00] --- Fri Mar 7 2008