highaltitude.log.20141124

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[00:30] <Maxell> craag: Oddstr13: LOLOLOLO "20:53:46 < Oddstr13> just hope it isn't a ridicolusly obfuscated js"
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[00:31] <Maxell> Soo sad actually :(
[00:31] <Maxell> API-ing would could mean so much for software defined radio
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[00:32] <Maxell> The fact it's software could open things like running aprs igates on all bands and even on voice repeaters etc
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[06:31] <SpacenearUS> New position from 03AETH28-1 after 032 days silence - 12http://habhub.org/mt/?focus=AETH28-1
[06:32] <arko> neat
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[07:07] <lz1dev> !aprs info aeth28-1
[07:07] <SpacenearUS> 03lz1dev: 03AETH28-1 was near 03Italy 10(40.41436,14.23144) at 0318901 meters about 0335 minutes ago - 12http://aprs.fi/info/AETH28-1
[07:07] <SpacenearUS> 03lz1dev: Path: 03AETH28-1>APSTM1 via 03ARISS,qAR,IZ0PMP-7
[07:07] <SpacenearUS> 03lz1dev: Comment: 03G3SS'600D KF5KMP 
[07:07] <SpacenearUS> 03lz1dev: Telemetry: 03Batt 104.11 V 03Solar 100.631 V 03Temp 10-33.1 C 03Sats 105 03S2L 108
[07:09] Action: SpacenearUS is going for a nap.
[07:09] Action: SpacenearUS is back!
[07:09] <lz1dev> !aprs info aeth28-1
[07:09] <SpacenearUS> 03lz1dev: 03AETH28-1 was near 03Italy 10(40.41436,14.23144) at 0318901 meters about 0338 minutes ago - 12http://aprs.fi/info/AETH28-1
[07:09] <SpacenearUS> 03lz1dev: Path: 03AETH28-1>APSTM1 via 03ARISS,qAR,IZ0PMP-7
[07:09] <SpacenearUS> 03lz1dev: Symbol: 03O/ Speed: 03128° Course: 0352.88565951002142kmph
[07:09] <SpacenearUS> 03lz1dev: Comment: 03G3SS'600D KF5KMP 
[07:09] <SpacenearUS> 03lz1dev: Telemetry: 03Batt 104.11 V 03Solar 100.631 V 03Temp 10-33.1 C 03Sats 105 03S2L 108
[07:17] Action: SpacenearUS is going for a nap.
[07:17] Action: SpacenearUS is back!
[07:28] <SpacenearUS> New position from 03AETH28-4 after 0314 hours silence - 12http://habhub.org/mt/?focus=AETH28-4
[07:34] <lz1dev> !hysplit run aeth28-4
[07:34] <SpacenearUS> 03lz1dev: Your job has been added to the queue. Check in a few minutes
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[09:25] <pd3jag> hello to all someone have info about PAYLOAD ?? req and mode pse??
[09:25] <pd3jag> freq
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[09:28] <lz1dev> !payload PAYLOAD
[09:28] <SpacenearUS> 03lz1dev: Can't find a flight doc matching your query
[09:28] <lz1dev> !flights
[09:28] <SpacenearUS> 03lz1dev: Current flights: 03EDUPICM8 duration test 10(29b3), 03B-64 434.500 Contestia 64/1000 10(3afe)
[09:28] <lz1dev> !ping payload
[09:28] <SpacenearUS> 03lz1dev: Last contact with 03PAYLOAD was 03a day ago
[09:28] <lz1dev> you are too late :)
[09:29] <fsphil> interesting name for a payload
[09:29] <lz1dev> yes, it's pushing the bounderies of creativity
[09:29] <lz1dev> :)
[09:29] <daveake> I shall make one called PING
[09:30] <daveake> or PONG
[09:30] <Darkside> so you can !ping pong
[09:30] <Darkside> !ping pong
[09:30] <SpacenearUS> 03Darkside: No contact from 03pong
[09:30] <daveake> exactly :)
[09:30] <mikestir> you should have called your two way lora experiment that daveake
[09:30] <daveake> !ping aliens
[09:30] <SpacenearUS> 03daveake: No contact from 03aliens
[09:30] <daveake> I should :)
[09:30] <fsphil> and then it finally goes out of range, ping will timeout
[09:31] <mikestir> 100% envelope loss
[09:31] <mfa298> will you get a ttl error if it carries on past it's flight doc expires ?
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[09:33] <dg9bfc_sigi> hello to all
[09:34] <mfa298> maybe that's the payload that should also impliment rfc 1149
[09:40] <lz1dev> !aprs ping aeth*
[09:40] <SpacenearUS> 03lz1dev: Latest contact: 03AETH28-3 10(a day ago), 03AETH28-1 10(3 hours ago), 03AETH28-4 10(a few seconds ago)
[09:41] <mikestir> so. who knew you could do this in C? http://pastebin.com/KExERSSC
[09:41] <mikestir> no googling
[09:41] <mikestir> specifically the comma separated boolean expression - the do/while just illustrates a nice use for it
[09:43] <fsphil> I've often used the comma in for() but never seen it used that way
[09:43] <mikestir> yeah I've used it in for loads of times without considering it might be a general thing
[09:44] Action: fsphil googles :p
[09:44] <mikestir> apparently all the terms are executed in order, but the "value" of the expression is whatever the last one returns
[09:44] <fsphil> ah
[09:44] <mikestir> so that do, while construct effectively only does the delay if the loop is actually going to go around again
[09:46] <lz1dev> yep
[09:46] <fsphil> I would normally do that by a few if() break;'s
[09:46] <fsphil> then the delay() at the end
[09:46] <lz1dev> but it's probably better to add that delay at the start of the loop
[09:46] <lz1dev> for readibility
[09:47] <mikestir> no because then it would execute potentially unnecessarily if the loop completed first time
[09:47] <fsphil> it was probably added just for the for() use
[09:47] <mikestir> fsphil: I'd do the if/break thing as well
[09:48] <lz1dev> you are essentually adding the delay before the loop
[09:48] <fsphil> yea more readable. but that's cute too. always nice to learn a new C thing :)
[09:48] <lz1dev> the same as adding the delay at the top of the block
[09:48] <mikestir> lz1dev: yes, but only before the second and subsequent loops
[09:48] <mikestir> it's not the same as adding it to the top of the block
[09:48] <lz1dev> yes?
[09:49] <lz1dev> its the same tho :D
[09:49] <mikestir> it isn't
[09:49] <mikestir> the delay does not execute if the condition to exit the loop is true at the end of the first iteration
[09:49] <mikestir> because the boolean terms are executed in order and stop being evaluated as soon as the condition is met
[09:49] <lz1dev> its the same
[09:49] <mikestir> go and try it
[09:50] <lz1dev> 1. evalute while expression
[09:50] <lz1dev> 2. if true, run do block
[09:50] <lz1dev> 3. back to 1
[09:51] <fsphil> ah
[09:51] <fsphil> do { } while() always runs anyway
[09:51] <edmoore> yeah
[09:51] <edmoore> i was gonna say
[09:51] <edmoore> otherwise i've been getting away with wrong C for years
[09:52] <edmoore> do while always runs the block once through before evaluating the while
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[09:52] <lz1dev> never ever used do while in my C code
[09:52] <lz1dev> whelp
[09:53] <mikestir> lz1dev: http://pastebin.com/tXcr4MUJ
[09:53] <mikestir> not the same
[09:53] <mikestir> note the extra call to delay
[09:53] <lz1dev> http://en.wikipedia.org/wiki/Do_while_loop#Equivalent_constructs
[09:53] <lz1dev> yeh
[09:54] <mikestir> anyway it's a neat trick if a bit unreadable, but it came from a chip vendor's SDK source so unreadable ratsnest is to be expected
[10:00] <daveake> A colleague at one place had some code with a while test 8 solid lines of code
[10:00] <daveake> It didn't work
[10:00] <daveake> After 2 days he still couldn't make it work
[10:01] <daveake> I binned it and broke it down. Admittadly to probably 20-30 lines of code but at least it was readable and worked
[10:01] <edmoore> did he have a background in ladder logic?
[10:01] <fsphil> large logic tests are evil
[10:02] <daveake> that would be a sore point if I hadn't discovered that these PLCs can ne programmed in (something like) Pascal :)
[10:02] <daveake> "Structured Control Language"
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[10:03] <lz1dev> i've seen complicated text expression where a few simple bitwise operation would do the job
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[10:47] <Oddstr13> http://websdr.suws.org.uk/ what mode are those strong signals on the 3cm?
[10:49] <craag> Oddstr13: Most likely JT65
[10:51] <Oddstr13> dosn't sound like jt65
[10:55] <fsphil> has it stopped?
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[10:56] <fsphil> oh there it goes
[10:56] <Oddstr13> still playing
[10:56] <fsphil> yea doesn't sound like a JT mode
[10:56] <Oddstr13> too fast for jt65, a different melody, and wider band with
[10:56] <fsphil> JT always sounds very sad
[10:57] <Oddstr13> yep :P
[10:57] <fsphil> well that's morse now
[10:57] <Oddstr13> http://www.sigidwiki.com/wiki/JT65a
[10:57] <Oddstr13> yea, morse, a solid tone, and some other mode
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[10:58] <Oddstr13> has been broadcasting constant for over 10min
[10:58] <craag> They're all 24/7 beacons up there
[10:59] <fsphil> GB3SCX
[10:59] <craag> It's some JT mode, maybe JT11?
[10:59] <fsphil> JT4G apparently
[10:59] <craag> Hard to tell which beacon sometimes as the downconverter drifts a fair bit
[11:00] <fsphil> yea it's SCX if it's accurate
[11:00] <fsphil> there's another to the east of you at a slightly higher freq
[11:00] <fsphil> but yea JT4G does sound like that
[11:00] <fsphil> a much happier mode
[11:01] <Oddstr13> okay ^^
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[12:30] <SpeedEvil> Protip.
[12:30] <SpeedEvil> Really easy way to cut foam.
[12:30] <SpeedEvil> Chainsaw.
[12:31] Action: SpeedEvil is currently rigging up a chainsaw mill to cut slabs of foam.
[12:36] <lz1dev> also an easy to lose fingers
[12:39] <SpeedEvil> I should be >1m from the blade
[12:40] <SpeedEvil> so I'd have to leap at it.
[12:40] <SpeedEvil> - they are 1.2*2.4*.15m slabs
[12:40] <SpeedEvil> ish
[12:40] <SpeedEvil> with wobbly edges
[12:40] <SpeedEvil> I want to tidy up the edges, and mitre them
[12:44] <Laurenceb> whats wrong with a hand saw? that stuff cuts easily
[12:45] <SpeedEvil> Laurenceb: I want to mitre at ~50 degrees 40 sheets (eventually) accurately.
[12:45] <SpeedEvil> As well as accurately trimming edges so they're flat and square
[12:46] <SpeedEvil> And possibly internal cuts too
[12:50] <SpeedEvil> Cunning.
[12:50] <SpeedEvil> On orbital sciences recent unplanned reactivity excursion.
[12:50] <SpeedEvil> Orbital Sciences: We'll get full interim milestone Nasa payment for Oct. 28 launch despite failure since
[12:50] <SpeedEvil> failure occurred after liftoff.
[12:50] <fsphil> failure is a milestone?
[12:53] <SpeedEvil> No -launch is a milestone
[12:53] <SpeedEvil> So they get 2/3 payments by making the vehicle and it then lifting off
[12:54] <SpeedEvil> they only miss out on the last 50m payment - which they insured
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[13:06] <lz1dev> SpeedEvil: reminds me of https://www.youtube.com/watch?v=eiYoBbEZwlk&t=96
[13:13] <SpeedEvil> yeah
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[14:11] <zjztgj> Anybody has an idea if a very light UAV can legally launched from a balloon in europe with out extensive bureaucracy?
[14:12] <edmoore> 'europe' is too vague for a single answer
[14:12] <edmoore> it's at a country level
[14:12] <edmoore> the legislation, that is
[14:15] <zjztgj> germany, netherlands, france or uk would be my favorite
[14:16] <zjztgj> but are there significant differents?
[14:16] <SpeedEvil> In the UK - it's a flat no.
[14:16] <SpeedEvil> (unless it's at under 70m altitude, and you're watching it and it's actively under control
[14:17] <SpeedEvil> Well
[14:17] <SpeedEvil> you can be in a helicopter within 70m
[14:17] <zjztgj> 'actively'? its closed loop :D
[14:17] <SpeedEvil> It has to be under human control
[14:18] <edmoore> you'd have to seek an exemption for your activity
[14:18] <edmoore> there's not existing legislation that would allow it in the uk
[14:18] <SpeedEvil> Or register as a 'proper' UAV
[14:18] <SpeedEvil> which is at the moment stalled as I understand it
[14:18] <edmoore> probably still no use at the flight levels you're going to use
[14:18] <SpeedEvil> yeah
[14:19] <SpeedEvil> Quadcopter at ~30km seems fun
[14:19] <SpeedEvil> you do need quite large props
[14:20] <zjztgj> where is the different of an uav and a payload on a parachute? The parachute?
[14:20] <SpeedEvil> yes
[14:20] <SpeedEvil> parachutes (in the UK) are a special exempt category
[14:21] <zjztgj> so a steered parachute uav is fine? :D
[14:21] <SpeedEvil> yes
[14:21] <zjztgj> interesting
[14:21] <SpeedEvil> But probably not one with an engine
[14:22] <gonzo_> special exempt == loophole
[14:23] <SpeedEvil> Naah
[14:23] <SpeedEvil> Loopholes are dragging yourself into the air on rollerskates under a parachute towed by R/C planes
[14:24] <SpeedEvil> Or having a quadcopter take off (weighing under 7kg) and slowly winching up more engines, batteries, and a pilot, and still being an 'unmanned light aircraft'
[14:24] <gonzo_> that is not a loophole, that is just being very drunk
[14:24] <SpeedEvil> The above are both legal under the letter of the CAA rules
[14:25] <gonzo_> and that one just sounds like a US HAB
[14:26] <SpeedEvil> Annoyingly, they don't properly define 'kite'
[14:26] <SpeedEvil> so it's hard to exploit
[14:26] <edmoore> i feel like they probably want to define parachute in terms of glide ratio, but don't know enough to go into that detail
[14:27] <edmoore> and so for us, a parafoil is probably allowed
[14:27] <SpeedEvil> yeah
[14:27] <Geoff-G8DHE-Lap> surely the size of the props is going to get silly for anything like 20-30Kms height ?
[14:27] <SpeedEvil> I get the feeling that parachute was really meant for huan parachute
[14:27] <SpeedEvil> Geoff-G8DHE-Lap: yes
[14:28] <SpeedEvil> 30km, you're looking at 1%
[14:29] <SpeedEvil> This means - for the same exhaust velocity - you need a 10* diameter fan, rotating at 1/10th the speed
[14:29] <SpeedEvil> If you accept the fact you're going to use a lot more power, then you can use a double or so the normal diameter fan
[14:38] <SpeedEvil> The only really annoying part is that it pretty much mandates CF props
[14:39] <SpeedEvil> And means you have problems finding motors that go slow enough
[14:44] <zjztgj> with a gear no problem, powerdenstity of fast running motor is higher anyway
[14:44] <edmoore> but mass efficiency is reduced by the mass of the gearing and its efficiency
[14:45] <mikestir> SpeedEvil: if you had a quadcopter hover 2 feet off the ground while you attached the extra engines and climbed on then presumably that would be ok too?
[14:45] <theRealSIbot> In real units: 2 ft = 0.61 m
[14:45] <edmoore> and also cooling at v low ambient pressures
[14:45] <SpeedEvil> mikestir: that is somewhat ambiguous
[14:45] <SpeedEvil> mikestir: probably.
[14:46] <SpeedEvil> mikestir: you want to really stick to things that are explicitly spelled out as OK in the regulations
[14:46] <mikestir> it's ok, I'm definitely not going to attempt an unlicensed manned flight on a pimped out quadcopter :)
[14:46] <SpeedEvil> mikestir: the reasonable argument could be for example that a 'launch' happens whenever soeone standing on the ground last touches it, for example
[14:47] <zjztgj> sure edmoore, but if powerdensity is the primary issue it helps
[14:48] <edmoore> sure
[14:48] <zjztgj> mikestir, but i assume not because of the regulations...
[14:49] <mikestir> quite!
[14:52] <zjztgj> hm the regulations are quite anoying, i spend some time on a uva: http://nearspaceplane.blogspot.de
[14:52] <zjztgj> but seams difficult to operate ist legaly
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[14:57] <edmoore> you'd want to go big-prop anyway I think for efficiency, as none of these things, not least batteries, scale down all that well
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[14:58] <edmoore> i've not done anything quantitative though so this is all anal extraction
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[16:12] <SpacenearUS> New vehicle on the map: 03BoSS - 12http://habhub.org/mt/?focus=BoSS
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[17:51] <MaXimaN> ping Upu
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[17:55] <Upu> hi MaXimaN
[17:55] <MaXimaN> Hola
[17:56] <MaXimaN> I had a quick question about your pAVA r9 - or whatever version it is up to now :)
[17:56] <MaXimaN> Specifically about the output stage of your 4060
[17:56] <Upu> I lost track too tbh
[17:56] <Upu> ok
[17:57] <MaXimaN> Looking at hte close-up pic I noticed you have a larger inductor for what the SI reference labels L-choke- - a 0805 rather than an 0402, I think
[17:57] <Upu> 220uH
[17:57] <Upu> I think
[17:57] <Upu> 0603
[17:57] <MaXimaN> That's the one
[17:57] <MaXimaN> Jsut what was available at than inductance?
[17:57] <MaXimaN> Or a specific reason for "going large"? :)
[17:58] <Upu> I think I used the part recommended in the data sheet
[17:59] <Upu> quite a while ago now, was actually the design from pava8
[17:59] <MaXimaN> The datasheet says 0402 or 0603, so I assumed those would be okay
[18:00] <Upu> whats your issue just wanting to know or pushing for space ?
[18:00] <MaXimaN> Preferably wire-wound
[18:00] <MaXimaN> I was just curious - space isn't an issue. I wondered if I'd missed a trick concerning that particular inductor, e.g. something not on the datasheet
[18:01] <MaXimaN> I mean, aside from it being marginally easier to hand solder
[18:03] <MaXimaN> Only thing I could think of was variations in self-resonant frequency
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[18:05] <MaXimaN> Upu: Ta for the feedback
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[18:53] <SpacenearUS> New position from 03EDUPIC9 after 033 days silence - 12http://habhub.org/mt/?focus=EDUPIC9
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[18:55] <PB0NER-Martijn> Maxell: are you QRV?
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[19:40] <Maxell> PB0NER-Martijn yes
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[19:45] <guido___> maybe a bit offtopic but related http://globalvoicesonline.org/2014/11/17/russia-sewers-poop-river-petersburg-gps/
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[19:46] <Lunar_Lander> hello
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[19:57] <ChrisMostert> Hello everyone!
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[19:58] <ChrisMostert> If you're interested, we've uploaded a video with the launch of our Meurs mark-1 from yesterday :)
[19:58] <ChrisMostert> https://www.youtube.com/watch?v=yIz-Jx3OOgU
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[20:05] <PE0SAT> ChrisMostert: thx
[20:06] <mclane_> what kind of balloon did you use?
[20:06] <craag> small balloon
[20:07] <ChrisMostert> My other team member, Michel, got us the balloon. I believe it was a 300gr balloon from china, bought via ebay
[20:07] <ChrisMostert> Don't know the specifics
[20:08] <craag> I was going to guess maybe 200g
[20:08] <craag> smooth launch!
[20:09] <PE0SAT> helium or hydrogen?
[20:09] <ChrisMostert> Helium
[20:09] <craag> did you measure the neck lift at all?
[20:10] <ChrisMostert> We planned to, but in the heat of the moment we kind of forgot, we did pack a newtonmeter.
[20:10] <PE0SAT> ChrisMostert: :D
[20:10] <craag> heh would have been difficult in that wind
[20:11] <craag> Easier to fill down by the trees, and walk it up for launch
[20:11] <mclane_> take a bottle of water next time
[20:11] <ChrisMostert> What for?
[20:11] <mclane_> with the desired lift
[20:11] <craag> yeah, then stop when it's *just* lifting the bottle
[20:12] <ChrisMostert> Ah, great advice, that seems like a better way to go about it :)
[20:12] <mclane_> the habhub burst calculator will tell you how much necklift you need for a given ballon and payload weight
[20:13] <craag> Getting the fill right will be the first thing to get right next time
[20:13] <ChrisMostert> We thought we had way more necklift than we had in reality
[20:13] <craag> From what I hear - your tracker worked great - which is what most people struggle with on the first flight so well done on that!
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[20:14] <mclane_> your payload looks to be a 600-700g weight
[20:14] <craag> they said it was 700g iirc
[20:14] <ChrisMostert> We kind of surprised ourselves with that, too. thanks! :)
[20:16] <mattbrejza> what altitude did 200g balloon, 700g payload get to?
[20:16] <ChrisMostert> around 4.5 km
[20:16] <ChrisMostert> Then it started slowly descending
[20:16] <ChrisMostert> Max vertical speed was about 1 m/s
[20:17] <mattbrejza> :/
[20:17] <craag> you really want to aim for 4-5 to avoid float
[20:18] <ChrisMostert> Yeah, we actually tried to calculate the amount of helium to get around 3 m/s
[20:18] <ChrisMostert> But I guess that did not really go according to plan :p
[20:18] <craag> That requires measuring how much you've put in :P
[20:18] <ChrisMostert> Which we should have planned better in advance, yes
[20:19] <ChrisMostert> We spent way too much of our time on the electronics and not nearly enough on the balloon
[20:19] <craag> Oh well - looks like you had fun!
[20:19] <ChrisMostert> We did, and we hope you did too :)
[20:20] <ChrisMostert> And thanks for all the advice!
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[20:20] <Geoff-G8DHE> Humm B-64 should be approaching Norway
[20:21] <craag> I was out of range for the tracking, but watched on snus. It was quite a lot of people who switched on to help receive it!
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[20:52] <jededu> EDUPIC9 Launching tomorrow 434.275 100 8N2
[20:52] <Geoff-G8DHE> 434.275 ?
[20:53] <jededu> Yes not 225
[20:53] <Geoff-G8DHE> its said 434.65 in the doc
[20:53] <jededu> I know I keep forgetting to change it I wonder if somone could do it
[20:54] <SA6BSS> I´m free tomorrow, if it comes this way, as it looks, I´m ready :)
[20:55] <Geoff-G8DHE> Ah B-65 might be inrange for you soon ?
[20:55] <SA6BSS> yeap, radio on 434.5 but I sure the batts run out by know
[20:55] <Geoff-G8DHE> yes it will be dark and not much in the batteries
[20:55] <SA6BSS> probably passed me when the batt get sharged up tomrow morning
[20:56] <Geoff-G8DHE> Always the way! Just set up for edupic9 ready to leave it running for the morning!
[20:57] <SA6BSS> yeah, would be fun to try the range of my new yagi, the ballons have kind of awoding me or ditched in the sea
[20:57] <SA6BSS> last weeks
[20:58] <jededu> Cool its going right over your head :)
[20:59] <jededu> Just testing the new power saving code
[20:59] <SA6BSS> edupic should come in my range, and the wheather is going to be sunny and warm (7-8 degr) tomorrow
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[21:04] <Geoff-G8DHE> Oh the Antares failure from all cameras https://www.youtube.com/watch?v=UsvUVDTgPoI#t=73
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[21:07] <SpacenearUS> New vehicle on the map: 03clio compus 2011_chase - 12http://habhub.org/mt/?focus=clio%20compus%202011_chase
[21:08] <ulfr> Geoff-G8DHE: wow
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[21:08] <ulfr> some really interesting shots there.
[21:08] <Geoff-G8DHE> yes the slo-mo from half way in is good!
[21:08] <ulfr> indeed.
[21:08] <ulfr> gives a whole new perspective of the incident
[21:10] <Geoff-G8DHE> you can see a spurt of fuel ? come out just before 5:26 prior to the engine exploding!
[21:11] <ulfr> it's a bit crazy yeah
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[21:13] <Laurenceb_> i think B-64 froze
[21:13] <Laurenceb_> hopefully it will appear over Sweden tomorrow
[21:13] <Geoff-G8DHE> waiting for day light
[21:14] <Myself> at 2m27s is that a camera in a mailbox sitting on a portable tripod?
[21:14] <Myself> ehh, 2m16s is a better view
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[21:35] <SpacenearUS> New vehicle on the map: 03USER_chase - 12http://habhub.org/mt/?focus=USER_chase
[21:36] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://habhub.org/mt/?focus=CALLSIGN123_chase
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[21:48] <Laurenceb_> is there a python equivalent to fprintf?
[21:49] <adamgreig> uh
[21:49] <adamgreig> f.write("bla %.02d\n" % 2.456)
[21:49] <adamgreig> ?
[21:49] <adamgreig> (you should use new-style formatting e.g. "bla {:.2f}".format(2.456)
[21:50] <Laurenceb_> ok thanks
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[21:50] <adamgreig> open("whatevs", "w").write("bla\n") sort of thing
[21:50] <Laurenceb_> this is python 2.7
[21:50] <adamgreig> yea so
[21:50] <adamgreig> the new style formatting predates 2.6 i think
[21:50] <Laurenceb_> fid.write("%f,%f,%f,%d\n",data['RMS'][0:3],data['Temperature']) <- is that sane?
[21:51] <adamgreig> no
[21:51] <Laurenceb_> data['RMS'] is three floats
[21:51] <adamgreig> note how I didn't put a comma
[21:51] <adamgreig> write() is not fprintf()
[21:51] <adamgreig> you have to create the string and then write it
[21:51] <adamgreig> write only takes the one argument
[21:51] <adamgreig> ("%s" % str) uses the % binary operator to format a string
[21:52] <Laurenceb_> ok
[21:52] <adamgreig> "%f,%f,%f,%d\n" % data['RMS'][0:3] + (data['Temperature'],)
[21:52] <adamgreig> but I would do:
[21:52] <adamgreig> "{},{},{},{}\n".format(*data['RMS'][:3], data['Temperature'])
[21:52] <adamgreig> or tbh probably ','.join(data['RMS'][:3] + [data['Temperature']]) + "\n"
[21:53] <adamgreig> all options
[21:53] <Laurenceb_> and fid.write that?
[21:53] <adamgreig> yea
[21:53] <Laurenceb_> ok, thanks
[21:53] <adamgreig> you can e.g. "{:.2f},{:.2f},{:.2f},{}\n".format(... too, to control the number of digits etc
[21:54] <Laurenceb_> thats useful, yeah
[21:54] <Laurenceb_> what does * in front of the first data do?
[21:55] <adamgreig> tells python to use this tuple as separate arguments, basically
[21:55] <adamgreig> so like
[21:55] <adamgreig> f(a, b, c): pass
[21:55] <adamgreig> f needs 3 arguments
[21:55] <adamgreig> if I had like d = [1, 2, 3]
[21:55] <adamgreig> I can't f(d)
[21:55] <adamgreig> because that's one argument
[21:55] <adamgreig> but I can f(*d)
[21:55] <adamgreig> the * has it use the first level of iteration on d as separate arguments
[21:56] <Laurenceb_> ah
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[22:08] <SpacenearUS> New vehicle on the map: 03lor_chase - 12http://habhub.org/mt/?focus=lor_chase
[22:09] <SpacenearUS> New vehicle on the map: 03M0UPU_chase - 12http://habhub.org/mt/?focus=M0UPU_chase
[22:11] <Upu> err
[22:11] <Upu> confused bot ?
[22:12] <daveake> You might want to check that your car is still outside :)
[22:12] <Upu> so much crap on the map I can't even tell where that is
[22:12] <Upu> Oh I'm in spain
[22:13] <Upu> ok thats interesting
[22:13] <SpacenearUS> New vehicle on the map: 03EDUPIC8 - 12http://habhub.org/mt/?focus=EDUPIC8
[22:13] <daveake> cool. Nice weather launch from anywhere
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[22:16] <SpacenearUS> New vehicle on the map: 03etxebe_chase - 12http://habhub.org/mt/?focus=etxebe_chase
[22:17] <ulfr> Upu: how's the weather there?
[22:17] <daveake> rain in the plain
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[22:26] <Upu> indeed
[22:27] <Upu> is that a bug in the system or has someone actually decided to use my call sign ?
[22:28] <ulfr> Do you happen to have written a how to somewhere?
[22:28] <Upu> many but none with that call sign in
[22:29] <Maxell> All _chase vehicles are in space
[22:29] <Maxell> spain
[22:29] <Upu> in fact I've only used it myself once
[22:29] <ulfr> glitch in the matrix?
[22:30] <Upu> it should be auto imported from APRS
[22:30] <Upu> http://aprs.fi/#!mt=roadmap&z=11&call=a%2FM0UPU-9&timerange=3600&tail=3600
[22:30] <Upu> !aprs list
[22:30] <SpacenearUS> 03Upu: Tracking via APRS: 03AETH28-1, 03AETH28-10, 03AETH28-2, 03AETH28-3, 03AETH28-4, 03AETH28-5, 03AETH28-6, 03AETH28-8, 03M0UPU-9 10(M0UPU-Chase)
[22:30] <Upu> but I don't think thats come from there
[22:30] <Geoff-G8DHE> Probaly one of the AETH trying to appear with a legal callsign ;-)
[22:30] <Upu> haha
[22:31] <Maxell> yeah how is AETH28 a valid callsign?
[22:31] <Maxell> You no use callsign field some something else than your callsign would you?!
[22:32] <SpacenearUS> New vehicle on the map: 03etxebe_chase - 12http://habhub.org/mt/?focus=etxebe_chase
[22:32] <jcoxon> well the callsign is actually in the comment
[22:32] <jcoxon> so you can in theory use whatever call ID
[22:33] <Geoff-G8DHE> Have to ask the CEO of the company why he doesn't use his callsign Benjamin Longmier KF5KMP
[22:33] <Upu> ping jededu can I remove EDUPICM8 ?
[22:34] <jcoxon> Geoff-G8DHE, well using amateur radio for commercial enterprises is a different issue
[22:35] <Geoff-G8DHE> He uses AETH28 as the callsin abd puts his own call in the comment field!
[22:36] <Maxell> Does he?
[22:36] <edmoore> amazing antares footage
[22:36] <edmoore> presume its done the rounds by now
[22:36] <edmoore> i've been out all eve
[22:36] <Upu> bada boom
[22:36] <Upu> big bada boom
[22:36] <Maxell> Geoff-G8DHE: http://aprs.fi/info/?call=AETH28*
[22:37] <Geoff-G8DHE> Yup I posted it earlier after seeing fsphil post it on twitter
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[22:47] <SpacenearUS> New vehicle on the map: 03EDUPIC9 - 12http://habhub.org/mt/?focus=EDUPIC9
[22:49] <Maxell> Nice, 720p and 1080p w/ 50 or 60 frames per second now also availble with firefox html5 mode
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[23:06] <SpacenearUS> New vehicle on the map: 03iepa_chase - 12http://habhub.org/mt/?focus=iepa_chase
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[23:11] <jededu> upu yes ok to remove i did post on habhub earlier
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[23:18] <jededu> ping upu
[23:19] Nick change: heathkid|2 -> heathkid
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[23:56] <Dr_Dan> Hello, Im looking for input on building a R-Pi gps datalogger for a ground vehicle. The datalogger needs to be mobile and record to a file with timestamps. Ideally was hoping for a GPS Shield that plugs directly into the GPIO header. I need pretty good timing ~5 ms.
[23:57] <Dr_Dan> And decent positional accuracy say 2m for 1-sigma (CEP50%)
[00:00] --- Tue Nov 25 2014