highaltitude.log.20150917

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[07:21] <SpacenearUS> New vehicle on the map: 03KZN-HAB1 - 12http://tracker.habhub.org/#!qm=All&q=KZN-HAB1
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[12:05] <Sirius-BE> Ap
[12:05] <Sirius-BE> grmpf
[12:06] <eroomde> a good start
[12:06] <Sirius-BE> should have been ctrl-a-p
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[12:11] <Sirius-BE> eroomde: The rocket gods are in a good mood today?
[12:14] <eroomde> we tested them yesterday
[12:14] <eroomde> they haven't rebuked yet
[12:15] <Sirius-BE> means, no hard start ;-)
[12:15] <eroomde> we don't really get hard starts
[12:16] <eroomde> but it's possible with other kinds of propellant
[12:16] <Sirius-BE> only unexpected disassemlies?
[12:16] <eroomde> nor them!
[12:16] <Sirius-BE> yeah, H2 does not accumulate lot of mass in the chamber
[12:17] <eroomde> exactly
[12:18] <eroomde> if we did lox/keroscene, that can be bad
[12:18] <eroomde> if they don't ignite then you get a mix of lox and keroscene which manifests itself as an extremely high explosive wax
[12:18] <Sirius-BE> or H2O2/ethanol... which is nicely mixable
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[12:57] <SpacenearUS> New vehicle on the map: 03SP2YAP - 12http://tracker.habhub.org/#!qm=All&q=SP2YAP
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[15:13] <SpacenearUS> New vehicle on the map: 03LCARS_chase - 12http://tracker.habhub.org/#!qm=All&q=LCARS_chase
[15:16] <fsphil> the logical chase car
[15:16] <daveake> :)
[15:21] <SpacenearUS> New vehicle on the map: 03LCARS_chase - 12http://tracker.habhub.org/#!qm=All&q=LCARS_chase
[15:23] <SM0ULC> pS-53 died very fast?
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[16:19] <Lunar_Lander> evening
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[17:59] <SpacenearUS> New vehicle on the map: 03lic/NGG506_chase - 12http://tracker.habhub.org/#!qm=All&q=lic%2FNGG506_chase
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[18:49] <jet__> just found something i ought to share with you guys
[18:49] <jet__> http://i.imgur.com/vZNZrMj.jpg
[18:50] <jet__> on an old HAB article
[18:51] <Lunar_Lander> oh
[18:56] <jcoxon> haha
[18:56] <jcoxon> whats the article?
[18:58] <eroomde> rob i think
[18:58] <eroomde> when nasa couldn't work out how he'd done it
[18:58] <eroomde> presumably nasa called to say so from nasa, usa
[19:02] Nick change: Upui -> Upu
[19:06] <jet__> article is a guy called rob in a suit
[19:06] <jet__> he got some nice pictures but the tv aerial gave him away - illuminati
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[19:19] <SpeedEvil> jcoxon: :)
[19:19] <SpeedEvil> JelmerD:
[19:20] Action: SpeedEvil fails.
[19:35] <michal_f> does anybody have code to calculate distance between two lat/long points ?
[19:35] <michal_f> or even better, lat/long/altitude
[19:36] <chris_99> theres something called haversin(e)
[19:36] <chris_99> that's reasonably accurate i think
[19:37] <michal_f> thanks
[19:39] <chris_99> https://en.wikipedia.org/wiki/Haversine_formula lists some other formulas too
[19:40] <Upu> if you want to check your results http://www.movable-type.co.uk/scripts/latlong.html
[19:40] <michal_f> there's a haversine for python
[19:40] <Upu> also
[19:40] <Upu> free code
[19:40] <michal_f> https://pypi.python.org/pypi/haversine
[19:41] <lz1dev> lol
[19:41] <lz1dev> a whole module for 1 function
[19:41] <michal_f> :)
[19:43] <michal_f> speed reported by uBLOX modules is a ground speed or "3d" speed ?
[19:49] <RealBorg> ground speed
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[20:09] <Vaizki> I think they report pretty much all speeds possible..
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[21:09] <Lunar_Lander> I was thinking about a measurement thing
[21:10] <Lunar_Lander> in the paper by graeme they say they take the standard deviation of z-acceleration data from the balloon to get the Epsilon parameter for turbulence
[21:11] <Lunar_Lander> I was thinking if our current sampling interval of four seconds is enough to do the same or rather take a number of readings in each sample and do the standard deviation in these
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[21:15] <Lunar_Lander> what do you think about that?
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[23:37] <tweetBot> @daveake: LCARS HAB chase-car demo (map stuff faked for now) https://t.co/c4t0ofZm0e #UKHAS
[23:47] <ulfr> Evening.
[23:47] <ulfr> Anyone here got any experience in magnetometers?
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[00:00] --- Fri Sep 18 2015