highaltitude.log.20090519

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[00:28] <stilldavid> is there any reason not to use a handheld radio on the ground in a tracking system?
[00:30] <Laurenceb> poor sensitivity?
[00:31] <stilldavid> is it that much poorer in a handheld?
[00:31] <stilldavid> with an identical antenna?
[00:32] <stilldavid> I want something that I'll be able to re-use for other purposes, perhaps, and I think a handheld is more ideal
[00:32] <stilldavid> (looking at the vx-8r or similar)
[00:57] <Laurenceb> look at sensitivity
[01:01] <Laurenceb> what frequency?
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[02:08] <Laurenceb> http://www.coaa.co.uk/sondemonitor.htm
[02:08] <Laurenceb> ^ v interesting stuff
[02:09] <Laurenceb> not sure about the legality of launching ebay vaisala sondes without a license
[02:10] <SpeedEvil> I have 3 or 4 of those
[02:10] <SpeedEvil> gps
[02:10] <SpeedEvil> thoough not 'raw'
[02:10] <SpeedEvil> GPS AIUI
[02:10] <SpeedEvil> and I don't know how to decode
[02:13] <Laurenceb> AIUI?
[02:14] <Laurenceb> I have a few too
[02:14] <SpeedEvil> As I Understand It
[02:14] <Laurenceb> got you
[02:15] <SpeedEvil> in a gold foil bag, with a fillable battery, humidity, copper wire helical ant, bellows-pressure sensor?
[02:15] <SpeedEvil> polystyrene case, little cutout of the PCB forming a little oven
[02:16] <Laurenceb> yeah
[02:18] <SpeedEvil> http://cgi.ebay.co.uk/VAISALA-RS80-RADIOSONDE-SENSOR_W0QQitemZ230337794124QQcmdZViewItemQQptZUK_Antiques_AntiqueFurniture_SM?hash=item230337794124&_trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A2|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50
[02:19] <SpeedEvil> that's some funky furniture
[02:19] <Laurenceb> yep, got several
[02:19] <Laurenceb> heh
[02:19] <SpeedEvil> 433 I think
[02:21] <Laurenceb> I need to launch my UM12 test hab
[02:22] <Laurenceb> and build it for that matter...
[02:22] <Laurenceb> I'm going to stick the ublox receiver onto the rogallo as soon as its tested as a secondary payload
[02:23] <Laurenceb> the latency is so much lower than the lassen
[02:24] Action: Laurenceb wonders if USRP/GNU radio is an easy way to make a GPS
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[14:40] <rjharrison> ?
[14:40] <rjharrison> yell herabot
[14:40] <rjharrison> herabot
[14:40] <rjharrison> ! herabot
[14:40] <rjharrison> ! help
[14:41] <rjharrison> !herabot
[14:41] <rjharrison> ho hum
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[16:53] <Laurenceb> hi
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[17:14] <edmoore> just downloaded the new Ubuntu in <90 seconds
[17:14] <edmoore> I love JANET
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[17:21] <sbasuita> So JANET connects up university networks?
[17:22] <stilldavid> at 10 Gbits?
[17:29] <sbasuita> Students + 10gbit = bittorrent?
[17:30] <edmoore> unfortunately they're quite tight on bitorrent
[17:31] <sbasuita> Need to up the ante with a serving of crypto...
[17:31] <edmoore> they can still profile your bandwidth and spot likely suspects
[17:32] <edmoore> they're pretty sharp, the computing folks here
[17:32] <edmoore> that said there are internal torrents
[17:32] <sbasuita> Yeah, that's what I meant - internal
[17:32] <edmoore> bandwidth within CUDN (cam uni data network) is free
[17:32] <sbasuita> Need to constantly fill pipe with noise to disguise data ;)
[17:33] <DanielRichman> sbasuita, then they'd come over to see what all the noise was about#
[17:33] <sbasuita> DanielRichman, not if everybody was doing it
[17:33] <sbasuita> Then they'd be like :O
[17:33] <DanielRichman> You need to march down to the nearest network switch and hijack it
[17:33] <sbasuita> DanielRichman, why?
[17:33] <DanielRichman> What methods could they use to profile your data?
[17:34] <sbasuita> .wik deep packet inspection
[17:34] <herabot> "Deep Packet Inspection (DPI) (also called complete packet inspection and Information eXtraction - IX -) is a form of computer network packet filtering that examines the data part (and possibly also the header) of a packet as it passes an inspection point, searching for [...]" - http://en.wikipedia.org/wiki/Deep_packet_inspection
[17:34] <stilldavid> just did a bandwitdh test on my uni's network
[17:34] <stilldavid> "The slowest link in the end-to-end path is a 100 Mbps Full duplex Fast Ethernet subnet"
[17:34] <DanielRichman> sbasuita, right, note the "as it passes an inspection point"
[17:34] <DanielRichman> now an inspection point would have to be a relativly intelligent switch or router
[17:34] <stilldavid> that's the link from my computer to the switch downstairs :(
[17:34] <DanielRichman> to run a profiler
[17:34] <sbasuita> DanielRichman, obviously inspection points are strategically placed
[17:35] <DanielRichman> So hijack one, hope the password is the same in all of them
[17:35] <DanielRichman> ???
[17:35] <DanielRichman> profit!
[17:35] <sbasuita> DanielRichman, hijack?
[17:35] <DanielRichman> yep
[17:35] <sbasuita> ?
[17:35] <KingJ> "borrow"
[17:35] <stilldavid> sbasuita: repurpose ;)
[17:35] <DanielRichman> exactly
[17:35] <sbasuita> Bit vague...
[17:35] <SpeedEvil> The cost of a ten or hundred megbit internet link means it's well worth having seriously expensive DPI hardware on your network ingress/egress
[17:36] <edmoore> some people are more blatent
[17:36] <SpeedEvil> Even kit costing tens of thousands can quickly pay back
[17:36] <edmoore> just go on usenet and grab everything it silly speeds
[17:37] <sbasuita> I guess the unis don't really care about internal traffic though?
[17:37] <SpeedEvil> unless it saturates
[17:38] <edmoore> they care if it gets in the way of research
[17:38] <edmoore> the chemistry department can't do analysis, so they do numerical simulation and use more computing power than everyone else combined
[17:41] <SpeedEvil> computational foo dynamics can be very hungry.
[17:42] <DanielRichman> Do they use your spare cpu cycles or run a massive powerhouse?
[17:49] <edmoore> the latter
[17:49] <edmoore> my machine is my own
[17:50] <edmoore> there are quite a few machines available for them - for example there the main computing teaching room in the department which has some number of hundred linux boxes that are free at nights to work on stuff
[17:50] <edmoore> just as a forinstance
[17:52] <DanielRichman> om nom nom goodbye watts
[17:52] <DanielRichman> Good thing that there's linux boxes though
[17:52] <DanielRichman> so do the chemistry students learn to program?
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[20:08] <sbasuita> Wow... http://www39.wolframalpha.com/input/?i=barometric+pressure+in+reading+uk+on+dizzee+rascal%27s+5th+birthday
[20:09] <SpeedEvil> bonkers.
[20:10] <DanielRichman> ah
[20:10] <DanielRichman> I broke it
[20:10] <DanielRichman> http://www39.wolframalpha.com/input/?i=integreate+three+x+all+over+sixty+too+root+five+with+respect+to+x
[20:11] <DanielRichman> No wait. Gods
[20:11] <DanielRichman> I missspelt two
[20:11] <DanielRichman> it's alive! it works. That's crazy. Ask it to integreate three x over sixty two root five with respect to x
[20:11] <DanielRichman> http://www39.wolframalpha.com/input/?i=integreate+three+x+over+sixty+two+root+five+with+respect+to+x
[20:11] <DanielRichman> it actually did it :O
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[22:34] <jcoxon> evening natrium42
[22:36] <natrium42> yo jcoxon
[22:45] <jcoxon> hows things?
[22:46] <natrium42> a flood of work
[22:46] <natrium42> how are you?
[22:47] <jcoxon> tired :-) - long day
[22:47] <jcoxon> waiting for the jetstream to ease up
[22:47] <natrium42> hmm, anything i should get from sparkfun?
[22:47] <natrium42> i am getting the GPS LNAs
[22:49] <jcoxon> ummm, i'm not sure
[22:50] <jcoxon> we've had the worse JS for a very long time
[22:53] <natrium42> :(
[22:56] <SpeedEvil> natrium42: pandoras box. It's cheap, there must be something good inside!
[22:56] <natrium42> url?
[22:56] <natrium42> got pcbs from goldphoenix today
[22:57] <natrium42> one of them is for a higher efficiency dc/dc converter for atlantic halo
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[23:04] <jcoxon> natrium42, ooo that is exciting
[23:06] <natrium42> jcoxon, that's the maxim chip used --> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2456
[23:07] <natrium42> it's pretty tiny, which is good :)
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[23:25] <Laurenceb> http://www.guardian.co.uk/technology/2009/may/19/gps-close-to-breakdown
[23:25] Action: Laurenceb lols
[23:25] <Laurenceb> what a load of bs
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[23:30] Nick change: KingJ -> kingj
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[23:39] <Laurenceb> http://englishrussia.com/images/submitted_photos_10/17.jpg
[23:39] <Laurenceb> didnt know you could levitate dogs so easily
[23:46] <SpeedEvil> Laurenceb: feed the dog iron-rich food, and then use helmholtz coils as shown.
[23:47] <SpeedEvil> You can tell the really high current in the coils is causing dramatic heating.
[00:00] --- Wed May 20 2009