highaltitude.log.20150814

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[00:14] <SpacenearUS> New vehicle on the map: 03DL7AD-13 - 12http://tracker.habhub.org/#!qm=All&q=DL7AD-13
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[05:52] <SA6BSS> Having a tropo opening and I recorded this on 432.472Mhz in the beacon bandpass, anyone knowing what it is or how to decode it ??
[05:52] <SA6BSS> https://dl.dropboxusercontent.com/u/26543754/432.472.mp3
[05:53] <SA6BSS> the direction is about at the border on DE
[05:53] <SA6BSS> & SP Germany/Poland
[05:55] <SA6BSS> thats se from my loacot jo68sc
[06:16] <SA6BSS> hmm it is about in the direction of OZ7IGY - JO55WM54 434.471 but how to decode it
[06:16] <SA6BSS> 4
[06:16] <SA6BSS> 432.471
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[07:56] <fsphil> dont recognise it
[07:56] <fsphil> it's quite musical
[07:56] <fsphil> sounds like a bit of cw at the end
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[08:16] <fsphil> https://www.youtube.com/watch?v=h3sbfNW-Fdg
[08:17] <fsphil> "PI4" apparently
[08:17] <fsphil> new to me
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[08:42] <Vaizki> new to me too, VHF beacon apparently
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[08:51] <fsphil> it sounds much happer than the JT modes
[08:53] <mattbrejza> any pi users tried the win10 thingy?
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[10:08] <Laurenceb> calling inkscape users
[10:08] <Laurenceb> how is the default line width set?
[10:12] <Geoff-G8DHE> http://www.inkscapeforum.com/viewtopic.php?f=5&t=18277
[10:14] <Laurenceb> thanx
[10:14] <Laurenceb> lol I found that menu
[10:14] <Laurenceb> but the names are all different
[10:14] <Laurenceb> so stupid
[10:15] <Geoff-G8DHE> Watch out for the "locale" setting for the seperator! might be , or . or whatever its set to!
[10:33] <SpacenearUS> New vehicle on the map: 03SP9UVG_chase - 12http://tracker.habhub.org/#!qm=All&q=SP9UVG_chase
[10:45] <SA6BSS-Mike> fsphil: Vaizki: tnx, googled pi4 becon and the second hit was the oz7igy beacon info . http://www.southgatearc.org/news/march2013/oz7igy_beacons.htm#.Vc3GvLLtmko
[10:46] <fsphil> I tried fldigi on the CW part, only got IGY
[10:47] <SA6BSS-Mike> ok
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[10:47] <fsphil> I see there's a 10ghz beacon in N.Ireland now. might have a go at receiving that
[10:47] <SA6BSS-Mike> u have a downconverter?
[10:47] <fsphil> figure a satellite tv LNB would work
[10:47] <fsphil> into an airspy
[10:48] <fsphil> just need to make a circuit to inject the power
[10:49] <prog> what's the bandwidth of the signal in question?
[10:49] <SA6BSS-Mike> just a few hz
[10:49] <fsphil> doesn't mention, but I imagine just CW
[10:50] <craag> fsphil: This is what we use on the WebSDR: http://www.batc.org.uk/forum/viewtopic.php?t=3122
[10:50] <fsphil> http://www.qsl.net/gb3ngi/styled-3/index.html
[10:50] <craag> octagon pll ones
[10:50] <craag> -> 600MHz -> rtlsr
[10:52] <fsphil> hmm are they new? I've an old LNB that looks very similar
[10:53] <craag> The PLL ones have the stability for narrowband stuff, which was a problem with older ones.
[10:54] <craag> Ours is a PLL ones wrapped up in foam and still drifts a few khz and back each day.
[10:54] <fsphil> yea I'm expecting this one to drift like mad
[10:54] <craag> (it's on the top of the tower ofc)
[10:54] <craag> there is a mod around to lock them to a 10MHz output
[10:54] <craag> eg. from a gps
[10:59] <fsphil> ah the one I have is only specced down to 10.7ghz, beacon is 10.386
[10:59] <fsphil> was wondering why they where changing the crystals
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[12:15] <tigger-gg> "/query DL7AD"
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[14:20] <SpacenearUS> New vehicle on the map: 03H4M15H - 12http://tracker.habhub.org/#!qm=All&q=H4M15H
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[15:07] <Babs_> Afternoon all - is the HX1 the only option used by members for APRS transmission, or is there a smaller SMD option?
[15:08] <fxmulder> I'm playing with an si4063
[15:11] <Babs_> https://www.silabs.com/Support%20Documents/TechnicalDocs/Si4063-60.pdf fxmulder
[15:11] <Babs_> ?
[15:14] <Babs_> interesting - so you can do APRS and normal, er.... non-APRS like I'v done before from the same chip
[15:14] <Babs_> *I've
[15:15] <adamgreig> just gets a bit.. exciting
[15:15] <adamgreig> it's not a supported mode in the usual sense of things
[15:15] <mattbrejza> you can always pull the crystal if that makes you happier
[15:15] <Babs_> i have no idea what that means
[15:16] <Babs_> (this is not an uncommon occurence)
[15:16] <mattbrejza> https://ukhas.org.uk/guides:crystal_pulling
[15:17] <Babs_> i did a nice floater to prague https://www.flickr.com/photos/91049302@N00/17853135079/in/album-72157636929911016/
[15:17] <Babs_> debating whether the next step is solar power to give it a longer life, or APRS
[15:18] <Babs_> or given that longer life could see it drift out of Europe and most trackers, whether it is just null and void to give it solar power when no one would be able to track it anyway (and therefore give it the abiolity to do APRSE too)
[15:18] <Babs_> *APRS
[15:19] <Babs_> APRSE would probably be the terminology I would use when it goes wrong
[15:21] <mattbrejza> if you have a seperate power board then you can always add solar later
[15:24] <Babs_> I think Upu did that right?
[15:25] <UpuWork> sup ?
[15:25] <UpuWork> morning
[15:25] <Babs_> Hey Upuwork
[15:26] <Babs_> So I enjoyed my floater thingy, but it lasted only 22 hours and was nearly out of range anyway by the time it zonked out
[15:26] <Babs_> So I working out whether to advance it by APRS addition, or solar addition, or both
[15:27] <UpuWork> well the only APRS one I did was with a HX1
[15:27] <UpuWork> and a stack of batteries
[15:27] <Babs_> and you had an NTX2 on board then as well?
[15:28] <UpuWork> well RFM22B]
[15:28] <UpuWork> I made poor choices
[15:28] <UpuWork> it was a sucessful failure
[15:28] <Babs_> ahhh ok.
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[15:29] <Babs_> have you done any solar ones?
[15:29] <UpuWork> yeah
[15:29] <UpuWork> but just THOR16
[15:29] <UpuWork> out of range before I could prove the solar was really working
[15:29] <SpacenearUS> New vehicle on the map: 03KE7BCY - 12http://tracker.habhub.org/#!qm=All&q=KE7BCY
[15:29] <Babs_> Lipo? In which case did you have to throttle down the voltage?
[15:29] <UpuWork> lipo -> step down
[15:29] <UpuWork> buck
[15:30] <Babs_> to 1.8 or 3.3?
[15:30] <UpuWork> 1.8
[15:30] <Babs_> snazzy
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[15:37] <SpacenearUS> New vehicle on the map: 03KD0GTK - 12http://tracker.habhub.org/#!qm=All&q=KD0GTK
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[16:02] <SpacenearUS> New vehicle on the map: 03KC9QBK-6 - 12http://tracker.habhub.org/#!qm=All&q=KC9QBK-6
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[17:29] <SpacenearUS> New vehicle on the map: 03IZ5 - 12http://tracker.habhub.org/#!qm=All&q=IZ5
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[17:46] <Lunar_Lander> evening and kangaroo
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[17:58] <Lunar_Lander> flight 2 has a new box, new electronics, new mechanics and it is almost ready
[18:00] <mattbrejza> coming conference Lunar_Lander ?
[18:00] <Lunar_Lander> good question
[18:00] <Lunar_Lander> wanted to, but no problems solved as yet
[18:02] <mattbrejza> :(
[18:02] <Lunar_Lander> that's the sad thing about it
[18:02] <mattbrejza> book last minuite flights, find somewhere on airbnb, ???, profit?
[18:07] <Lunar_Lander> could be a possibility
[18:07] <Lunar_Lander> will look into it
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[18:21] <Babs_> picture lunar_lander?
[18:22] <Lunar_Lander> for the box?
[18:23] <Lunar_Lander> can show you one after dinner
[18:23] <Lunar_Lander> I think I got one
[18:23] <Lunar_Lander> brb
[18:40] <Babs_> new box, new electronics, lets ee it all!
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[19:03] <colin1> Hi, I have added a SD script to a gps-radiometrix programme (Stratodene 3). I can save recognisable data on the SD Card (LOG.csv), but it prints in a column rather than a row. Any suggestions (my programming knowledge is limited - but developing. )
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[19:12] <Geoff-G8DHE-M> Might help if you put your code and results up on http://pastebin.com/ and pasted the link here for comment ?
[19:16] <Lunar_Lander> back
[19:16] <Lunar_Lander> Babs_, one moment
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[19:21] <Interoth> I'm looking to submit a CAA application for the balloon launch, I am looking to launch on a weekend, would it be unlikely to be approved if I include 4 weekends time range?
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[19:30] <colin1> okay Geoff, I have just joined pasetbin! Thanks.
[19:33] <Lunar_Lander> Babs_, box 2 https://drive.google.com/file/d/0B1lke6hPHKJDQ3JhLTBzTnphUGc/view?usp=sharing, antenna 2 https://drive.google.com/file/d/0B1lke6hPHKJDX1pfT1JOOTA5cUU/view?usp=sharing, system 2 https://drive.google.com/file/d/0B1lke6hPHKJDTmtQOXVPdmtZS0U/view?usp=sharing
[19:33] <colin1> Geoff, my pastebin link is: http://pastebin.com/Vswtbqaa
[19:38] <Geoff-G8DHE> your variable txc is just one character for sending to the transmitter at a time, and that's what your saving in the file, rather than the entire txstring .
[19:42] <colin1> Please excuse this question - what is the entire txstring? txc prints to serial fine, so I assumed it would do the same to the sd card (clearly not, though). any suggestions on what I might I do next?
[19:44] <Geoff-G8DHE> println is print line = sends the string and then a carraige return/line feed so each character appears on a new line.
[19:45] <Geoff-G8DHE> you would need to send the entire line in one go which is the variable txstring in the code, but only once each time its built up of course,.
[19:46] <Geoff-G8DHE> you could add the print to file at line 299
[19:51] <Babs_> nice Lunar_Lander! - what atmega chip is that? looks large
[19:51] <Lunar_Lander> thanks :)
[19:51] <Lunar_Lander> 644p
[19:51] <Lunar_Lander> I don't know from the top of my head the subtype
[19:52] <Lunar_Lander> if it is a PA or a 10PU or 20PU
[19:52] <Babs_> is that because only it has enough memory to do the whole sd library thing?
[19:52] <Babs_> I am having my latest camera holder cnc machined out of blue polystyrene
[19:53] <Babs_> it is gloriously over the top but should be beautiful
[19:58] <Lunar_Lander> :)
[19:58] <Lunar_Lander> I chose it for the number of I/O ports it has and also for the 64K flash to have some overhead
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[20:07] <colin1> Geoff, I removed the "ln" from the print code - this gets the code printing horizontally. I am now trying to include the section of print code at line 299. Do I still use txc, or do I use the string code on line 298? I will experiment and get back to High Altitude. Thanks for your help. Colin.
[20:11] <Geoff-G8DHE> line 298 is where txstring is filled with the needed text, after that point you can use txstring as the entire line.
[20:12] <colin1> Okay - thanks.
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[20:22] <colin1> Geoff - made the change in the print script and everything works fine. This being so, do I need to move the print script to line 299. anyhow, thanks for your generous help. Colin.
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[20:34] <SpacenearUS> New position from 03LZ100AJ after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=LZ100AJ
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[21:45] <Laurenceb_> http://hackaday.com/2015/08/14/dutch-student-teams-aims-to-launch-rocket-to-50km/
[21:46] <SpeedEvil> Interesting
[21:46] <SpeedEvil> Going the very otehr way
[21:46] <Laurenceb_> yes
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[21:49] <SpeedEvil> Gets a hell of a lot lighter that route if you have the first stage light, and coast for 60s at ~m1
[21:50] <SpeedEvil> But that of course means guidance.
[21:50] <Laurenceb_> yeah but optimised for low mass you can easily do <100grams for spin stabilised
[21:50] <Laurenceb_> yeah
[21:50] <Laurenceb_> guidance is heavy
[21:51] <Laurenceb_> alternatively with gun launch you can do 100grams thats ~50% useful payload
[21:51] <Laurenceb_> but gun launch is prob too nutty
[21:52] <SpeedEvil> Weeel
[21:52] <SpeedEvil> I was looking at guidance using the spun rocket, and a dipper into the exhaust stream
[21:52] <SpeedEvil> - or an assymetrical rotating nozzle extension
[21:53] <SpeedEvil> Well - if using gun launch at altitude, there is no reason to go slowly
[21:53] <SpeedEvil> ^or if starting at altitude
[21:54] <Laurenceb_> theres lots of interesting studies on "weird" techniques for controlling spin stabilised stuff
[21:54] <Laurenceb_> using ferrofluids and stuff
[21:54] <Laurenceb_> manipulating the moment of inertia tensor and things
[21:54] <SpeedEvil> The atmosphere is comedically thick for rockets under a ton or so and you don't have the sectional density for Sprint ABM
[21:55] <SpeedEvil> Laurenceb_: yeah - I was meaning the very simplest
[21:55] <SpeedEvil> More complex ones in principle seem quite possible
[21:57] <Laurenceb_> I'm actually writing some slides for the talk atm
[21:57] <Laurenceb_> trade off between ground launch, finned launch at ~25km, and spun launch and ~35km
[21:58] <Laurenceb_> seems to go as >100kg for ground, ~1 to 10kg for 25km, and <100grams for 35km
[21:58] <Laurenceb_> your rocket gets exponentially lighter
[21:58] <SpacenearUS> New vehicle on the map: 03NA9VY - 12http://tracker.habhub.org/#!qm=All&q=NA9VY
[21:58] <SpeedEvil> Well - ...
[21:59] <SpeedEvil> I think you may be assuming constant accelleration
[21:59] <SpeedEvil> A fairly low weight stage can get to ~35km if it can accellerate, coast
[21:59] <Laurenceb_> yeah i was looking at simple solids
[21:59] <SpeedEvil> but that may not be simpler
[21:59] <SpeedEvil> ^will
[22:04] <SpeedEvil> This would all be a lot easier if CAA/... would get out of the way
[22:04] <SpeedEvil> (and funding of course)
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[23:34] <SpacenearUS> New position from 03PS-48 after 036 days silence - 12http://tracker.habhub.org/#!qm=All&q=PS-48
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[23:52] <SpacenearUS> New vehicle on the map: 03PS-49 - 12http://tracker.habhub.org/#!qm=All&q=PS-49
[00:00] --- Sat Aug 15 2015