highaltitude.log.20101130

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[03:17] <juxta-phone> ping Darkside
[03:18] <Darkside> ping juxta-phone
[03:18] <Darkside> pong*
[03:18] <juxta-phone> woo it works
[03:19] <juxta-phone> i done think i can do nick completion though
[03:19] <juxta-phone> Dont*
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[14:50] Action: m1x10 mixio is back and tired
[14:50] Action: m1x10 is back and tired
[14:51] Action: m1x10 is operating hawk missisle lunch unit
[14:51] <m1x10> http://images.ellinikos-stratos.com/stratos/hawk1.jpg
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[15:16] <Laurenceb> nice, isnt that supposed to be secret :P
[15:17] <m1x10> no its just a unit
[15:18] <m1x10> and yesterday I had to check is 30 leds every 30s cause the camp was in alarm situation :p
[15:18] <m1x10> its 30 various leds every 30 minutes
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[20:36] Nick change: laurence_ -> Laurenceb_
[20:36] <Laurenceb_> hi
[20:37] Action: Laurenceb_ majorly screwed up
[20:37] <Laurenceb_> trying to retap holes on alu enclosure.... managed to shear the head off the bolt i was using
[20:38] <Laurenceb_> no theres a half tapped hole with a bit of bar jammed in it
[20:38] <Laurenceb_> :/
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[20:57] <Darkside> hey juxta
[20:58] <juxta> morning Darkside
[20:58] <juxta> it's too early! :(
[20:58] <Darkside> haha
[20:58] <Darkside> i have a med exam this morning
[20:58] <Darkside> then a psych evaluation...
[20:59] <juxta> ooh, for codan?
[21:00] <Darkside> well, minelab
[21:00] <Darkside> but yes
[21:00] <Darkside> same company really
[21:00] <juxta> nice :)
[21:00] <Darkside> aaaaanyway
[21:00] <Darkside> joel and I have submitted out talk proposal for linux conf
[21:00] <Darkside> were you ever planning on releasing the source code, or board files?
[21:01] <juxta> yeah
[21:02] <juxta> i'll setup a github or something
[21:02] <Darkside> yeah that'd be awesome
[21:02] <juxta> i just havent gotten around to it yet
[21:02] <juxta> along with the horus 11 and horus 12 writeup
[21:02] <Darkside> :P
[21:03] <Darkside> open sourcing it is always good :P
[21:03] <Darkside> and your code is good anyways :P
[21:03] <juxta> i think by good you mean it works
[21:03] <juxta> not good by any other measure ;)
[21:03] <Darkside> well, yes
[21:04] <Darkside> and it hasnt had any other problems
[21:04] <Darkside> hey, it works well
[21:04] <Darkside> and its relatively easy to read
[21:08] <Darkside> urgh, gotta head into the city soon for my medical
[21:08] <Darkside> juxta: you should come to hackerspace tonight
[21:08] <juxta> good luck - hopefully it's non invasive ;p
[21:08] <juxta> arr, i'd like to - I have a christmas thing tonight though
[21:08] <Darkside> awwwwwwww
[21:08] <Darkside> we've got Zoz from "prototype this" coming tonight
[21:09] <Darkside> and im gonna rig up a big HF antenna down the street
[21:11] <Darkside> ok, cya
[21:21] <juxta> have a good day Darkside
[21:25] <stilldavid> ping eroomde
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[22:07] <Laurenceb_> http://news.gather.com/viewArticle.action?articleId=281474978743812
[22:08] <SpeedEvil> Endless redirect loop looks like
[22:08] <SpeedEvil> oh
[22:09] <SpeedEvil> Interesting
[22:11] <Laurenceb_> probably nothing...
[22:12] <SpeedEvil> yeah.
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[22:14] <Laurenceb_> http://science.slashdot.org/story/10/11/30/1846255/Curious-NASA-Pre-Announcement#commentlisting
[22:15] <Laurenceb_> http://www.nmr-mouse.de/download/MobileNMRconcepts.pdf <-interesting
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[22:19] <Laurenceb_> SpeedEvil: http://www.nmr-mouse.de/download/MobileNMRconcepts.pdf <-interesting
[22:28] <Laurenceb_> http://nasawatch.com/archives/2010/11/mediablogger-ex.html
[22:30] <fsphil> heh, first attempt at ssdv over HF (range 3 metres): http://www.sanslogic.co.uk/ssdv/images/2010-11-30--22-29-57-hadie-01.jpeg
[22:34] <LazyLeopard> There's... bits of something there... ;)
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[22:36] <fsphil> yep - was a sort of success ;-)
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[22:39] <Laurenceb_> digital video?
[22:39] <Laurenceb_> what sort of modulation?
[22:39] <fsphil> mfsk
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[22:40] <fsphil> well, technically rtty
[22:40] <jcoxon> evening
[22:40] <Laurenceb_> got you
[22:40] <Laurenceb_> how many frequencies?
[22:40] <fsphil> g'day jcoxon
[22:40] <fsphil> just two atm
[22:41] <Laurenceb_> i see
[22:41] <Laurenceb_> aiui increasing the number of frequencies and increasing the bandwidth will help
[22:41] <Laurenceb_> its counterintuative but thats how channel capacity works
[22:42] <jonsowman> :)
[22:42] <fsphil> yea, if I can get this working I'll try four frequencies
[22:42] <Laurenceb_> have a play around plotting the shannon limit - its interesting to see how it changes with power, bandwidth
[22:43] <Laurenceb_> basically if you have a set power limit and link budget then theres a bandwidth beyond which you get limited returns
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[22:43] <Laurenceb_> something like 1KHz to 2 KHz for hab with 10mw 70cm
[22:44] <Laurenceb_> guess thats partly why mfsk64 works so insanely well
[22:44] <Laurenceb_> i can get 100% copy when theres nothing visable on the waterfall
[22:46] <Randomskk> I wonder what that looks like as a surface
[22:46] <Randomskk> hmm three variables, tricky
[22:46] <Randomskk> need four dimensions
[22:46] <Randomskk> or many surfaces
[22:46] <Randomskk> or fix something
[22:46] <Randomskk> noise floor I guess
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[22:48] <Randomskk> aw gnuplot can't log_2
[22:48] <Randomskk> maybe octave
[22:48] <Randomskk> surfaces in octave is tricky though
[22:48] <Laurenceb_> huh
[22:49] <Laurenceb_> what are the axes?
[22:50] <Randomskk> well I guess I'd do capacity upwards and bandwidth and power on the bottom plane
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[22:51] <Laurenceb_> yeah ok
[22:51] <Laurenceb_> well s/power/link budget
[22:51] <Laurenceb_> so link budget, bandwidth, capacity
[22:53] <Randomskk> meh octave
[22:54] <Laurenceb_> the graphic capability is variable
[22:54] <Laurenceb_> sometimes its just better to save as ascii file and fire up gnuplot
[22:55] <Randomskk> octave plots with gnuplot
[22:55] <Laurenceb_> i know
[22:55] <Randomskk> but making it do what I want exactly is trickier
[22:56] <Laurenceb_> but its api to gnuplot is... unpolished
[22:56] <Randomskk> sweet I think I did it
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[23:00] <Randomskk> here https://randomskk.net/u/shannon.png
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[23:02] <Randomskk> or in other words
[23:02] <Randomskk> increasing bandwidth is better than power to a point
[23:02] <Laurenceb_> yes
[23:02] <Laurenceb_> bandwidth is the thing everyone misses
[23:03] <Laurenceb_> as bandwidth ->0, data ->0
[23:04] <Randomskk> here https://randomskk.net/u/shannon_2.png
[23:04] <Randomskk> perhaps makes the log thing more obvious
[23:04] <Laurenceb_> nice
[23:05] <Randomskk> you definitely want some bandwidth
[23:05] <Randomskk> but power is the gift that keeps on giving?
[23:05] <Randomskk> that's funny actually
[23:05] <Randomskk> have I got it backwards?
[23:05] <Laurenceb_> nope
[23:05] <Randomskk> even though capacity = bandwidth * log2(1+power/noise)
[23:05] <Laurenceb_> capacity eventually levels out as you increase bandwidth
[23:05] <Randomskk> you'd think increasing bandwidth keeps increasing capacity
[23:06] <Randomskk> seeing as it's linear there
[23:06] <Laurenceb_> http://en.wikipedia.org/wiki/Phase-shift_keying <- also worth a real
[23:06] <russss> http://spacelog.org <--what we built last week. In a fort.
[23:06] <Laurenceb_> http://en.wikipedia.org/wiki/File:Channel_capacity_for_complex_constellations.svg
[23:06] <Randomskk> in a fort?
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[23:06] <Laurenceb_> ^ especially that
[23:06] <russss> yeah. In a fort. (www.devfort.com)
[23:06] <Laurenceb_> lol ok
[23:06] <Randomskk> oh I did hear about this
[23:06] <Randomskk> was it pretty sweet?
[23:09] <Randomskk> small world. ben firshman went to 3, 4, A, is also the registrant for ukhas.org.uk
[23:09] <russss> omg
[23:09] <russss> heh
[23:10] <russss> he was at our one too
[23:10] <russss> (5 - not on the site yet)
[23:12] <Laurenceb_> bens hardly ever on here
[23:12] <Laurenceb_> but yeah he hosts the site
[23:12] <Randomskk> well
[23:12] <Randomskk> he doesn't host it any more
[23:12] <jonsowman> indeed
[23:12] <jonsowman> he owns the domain currently though
[23:13] <Laurenceb_> oh
[23:13] <Laurenceb_> <- clueless
[23:13] <jonsowman> ukhas.org.uk is hosted on nessie now :)
[23:14] <Laurenceb_> neat
[23:17] <stilldavid> russss, you going to be around the hacker space on Thursday?
[23:18] <russss> I'm only usually here on tuesdays, I might be able to drop by though
[23:19] <stilldavid> I'm thinking of dropping by sometime :)
[23:19] <russss> there will almost certainly be someone here mid-afternoon to evening
[23:19] <stilldavid> flying out tomorrow morning
[23:50] <fsphil> hmm.. bt's fttc modem doesn't like even low power 80m signals
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[00:00] --- Wed Dec 1 2010