highaltitude.log.20200511

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[07:47] <SpacenearUS> New position from 03PS-76 after 0319 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-76
[08:05] <SpacenearUS> New vehicle on the map: 03Kampala_chase - 12https://tracker.habhub.org/#!qm=All&q=Kampala_chase
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[08:57] <PE2BZ> !hereis sammy6
[08:57] <PE2BZ> !whereis sammy6
[08:57] <SpacenearUS> 03PE2BZ: 03SAMMY6 was over 0353.18147,8.40628 at 035641 meters about 034 days ago
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[10:22] <SpacenearUS> New vehicle on the map: 0319GSN0013_chase - 12https://tracker.habhub.org/#!qm=All&q=19GSN0013_chase
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[11:41] <SpacenearUS> New position from 03KN4IUD-15 after 034 days silence - 12https://tracker.habhub.org/#!qm=All&q=KN4IUD-15
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[12:24] <SpacenearUS> New position from 03W8MV-11 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W8MV-11
[12:26] <SpacenearUS> New position from 03W5KUB-18 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W5KUB-18
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[12:31] <michal_f> I posted a question to the mail group, but it usually takes some time to show up. So let me ask it here too...
[12:32] <michal_f> I plan to launch small payload. piZero+piCamera. How can I stabilise it from spinning ?
[12:32] <Darkside> wind vane type arrangement seems to work ok
[12:32] <Darkside> but will add weight
[12:32] <Darkside> that helps it face into the wind
[12:32] <michal_f> a kind of vertical wing ?
[12:33] <Darkside> can do it in a few ways, but sure
[12:33] <Darkside> think weather-vane
[12:33] <michal_f> ok. one idea !
[12:33] <Darkside> thats the way we've done it in the past, it works ok
[12:34] <Darkside> but regardless if you are capturing pictures then you should be implementing the poor-mans sharpness filter
[12:35] <michal_f> I was thinking of making a suspension of 3 parallel lines, separated from each other like 10cm ... could make payload align to balloon, and balloon doesn't spin that much I suppose ?
[12:35] <Darkside> the balloon might spin
[12:35] <Darkside> who knows...
[12:35] <Darkside> ive found that if you do the sharpness filter trick, even if the payload is spinning a bit you still get good photos
[12:37] <Darkside> if you're using daveake's code i think you get that already
[12:37] <michal_f> I'll also record video, so this won't work
[12:38] <Darkside> no, it wont
[12:38] <Darkside> good luck then
[12:38] <daveake> Not tried it, but you can get the picam to emit stills whilst it's recording video
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[12:38] <Darkside> wind vane probably best approach
[12:38] <daveake> Pretty sure there's something in the Python lib for that
[12:38] <Darkside> but if its an ultralight payload im not sure how well it will work
[12:39] <Darkside> usually need a bit of weight in the centre for it to be reliable
[12:40] <Darkside> daveake: flown one of the new cameras yet?
[12:40] <daveake> lol lockdown
[12:40] <Darkside> i need to find better glass for mine
[12:40] <daveake> Wish I could have flown my test one before this started
[12:40] <Darkside> but damn is it heavy
[12:40] <daveake> My list f flights-to-do is growing somewhat
[12:41] <Darkside> yeah same
[12:41] <Darkside> i really want to get thie DVB-S payload up
[12:41] <Darkside> and then david rowe and I have some modem test flights to do
[12:41] <daveake> cool
[12:41] <Darkside> we want to try a flight with the payload transmitting at -20 dBm for shiggles
[12:42] <Darkside> the modem should handle it
[12:42] <michal_f> daveake, taking stills while recording video works very good. I used it, with python camera module.
[12:42] <SpacenearUS> New position from 03KB6CAG-12 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KB6CAG-12
[12:43] <daveake> Thanks michal_f ... I remember looking at it, not quite sure if I tested it all on the desk but certainly not in a flight yet
[12:44] <michal_f> tested in flight here.
[12:44] <Darkside> i wonder if i could make the DVB-S palyload capture still and downlink wenet at the same time...
[12:44] <michal_f> ok I was thinking this; https://paste.pics/5e5c5dc22e63ea4c3a7804d34120f9b8
[12:44] <michal_f> if upper triangle was firmly attached to neck, this could possibly reduce spinning
[12:45] <Darkside> assuming the balloon doesnt spin
[12:45] <Darkside> and you still need your parachute to go somewhere
[12:46] <michal_f> parachute at the neck maybe ?
[12:46] <Darkside> dunno
[12:46] <Darkside> i still think stick out the back is probably your best option
[12:46] <Darkside> make the paylaod point into the direction of travel
[12:46] <michal_f> https://www.youtube.com/watch?v=YGxc_tdGBgI this is short vid from last flight. This spin was partly due to cord not unrolling fully when releasing
[12:47] <daveake> I've found something that is ideal in lockdown .... coding an ADS-B parser :)
[12:48] <daveake> Normally there'd be too much data coming in :)
[12:48] <Darkside> daveake: going to fly an rtlsdr on a flight?
[12:48] <daveake> yup
[12:48] <michal_f> record some data for later, if you don't make it before things go back to normal :)
[12:48] <Darkside> heh
[12:48] <daveake> See what range ADS-B gets
[12:49] <Darkside> hopefully you dont get *Too* many packets at once
[12:49] <daveake> So far I've got the rx side all done, with a list of flights with current positions etc
[12:49] <daveake> Now need to think of a download packet format and method of cyclind ghrough the more imopirtant flights
[12:49] <Darkside> ADS-B reception has been done from space before... but i suspect some fancy algorithm were involved to deal with transmit collisions
[12:50] <Darkside> daveake: just send the one thats furthest away
[12:50] <daveake> There are satellites in the ADS-B network now
[12:50] <daveake> Yeah basically that
[12:50] <daveake> But it'd be nice to have a dashboard showing all the flights
[12:50] <Darkside> heh
[12:50] <Darkside> that'll be fun to downlink
[12:51] <daveake> I'm calculating the distance and remembering the furthest currently and so far
[12:51] <daveake> yeah
[12:51] <chris_99> daveake: are you using dump1090 to capture the data, or..?
[12:51] <Darkside> i guess you dont need to seend much info. callsign, lat, lon, alt.
[12:51] <daveake> Yes dump1090
[12:51] <daveake> It emits packets on port 30003
[12:51] <daveake> Callsign is a slight pain as only one of the messages includes it
[12:52] <daveake> Mostly aircraft Tx position (every 0.5s) with an ID, but the ID-->Callsign bit is every 5 secs
[12:52] <daveake> At least, that's what's coming out of dump1090
[12:53] <daveake> I read it uses an offline lookup table so I don';t think the aircraft is sending the callsign
[12:53] <chris_99> there's another standard too isn't there, as well as ads-b?
[12:53] <daveake> There's a USA one on a lower freq,, if thast's what you mean
[12:54] <daveake> And there's a separate system that the glider pilots set up
[12:54] <chris_99> i think it was acars?
[12:54] <daveake> "The protocol was designed by ARINC and deployed in 1978, using the Telex format." heh :)
[12:54] <chris_99> hehe
[12:55] <daveake> Anyway this thing is for ADS-B only
[12:55] <Darkside> the glider pilot one is FLARM, which is a closed proctol with a monopoly equipment provider
[12:55] <daveake> ah that's it
[12:55] <Darkside> but it has been reverse engineered and theres the open glider network that can decode it
[12:55] <chris_99> i think there was someone using ads-b on a satelite right?
[12:55] <daveake> Right, I made a receiver but not used it
[12:55] <Darkside> theres a few now
[12:55] <Darkside> a few ADS-B sat receivers i mean
[12:56] <chris_99> neat
[12:56] <daveake> ADS-B is collected by sats now and relayed down to the ground over a separate link
[12:56] <chris_99> that would be helpful for finding planes that crash i imagine?
[12:56] <daveake> So flights across oceans now get tracked all the way
[12:56] <daveake> Yep
[12:57] <daveake> It's pissed off the flat-earthers who liked that fact that long flights in the southern hemisphere seemed to disappear for much of the flight :)
[12:57] <chris_99> haha
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[14:34] <SpacenearUS> New vehicle on the map: 03OZ1ARQ-chase - 12https://tracker.habhub.org/#!qm=All&q=OZ1ARQ-chase
[14:35] <SpacenearUS> New vehicle on the map: 03ADSB - 12https://tracker.habhub.org/#!qm=All&q=ADSB
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[17:06] <SpacenearUS> New vehicle on the map: 03KN4ZEQ-11 - 12https://tracker.habhub.org/#!qm=All&q=KN4ZEQ-11
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[17:50] <SpacenearUS> New position from 03U4B-6 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-6
[18:10] <SpacenearUS> New vehicle on the map: 03KD4EOD-9 - 12https://tracker.habhub.org/#!qm=All&q=KD4EOD-9
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[18:31] <SpacenearUS> New position from 03KD2KDD-15 after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=KD2KDD-15
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[19:05] <SpacenearUS> New position from 03KN4IUD-15 after 037 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KN4IUD-15
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[20:07] <SpacenearUS> New vehicle on the map: 03Tracker_chase - 12https://tracker.habhub.org/#!qm=All&q=Tracker_chase
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[20:24] <SpacenearUS> New position from 03U4B-2 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-2
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[21:08] <SpacenearUS> New vehicle on the map: 03On4aub_chase - 12https://tracker.habhub.org/#!qm=All&q=On4aub_chase
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[00:00] --- Tue May 12 2020