highaltitude.log.20210830

[00:02] <SpacenearUS> New position from 03N4XWC-1 after 034 days silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[00:39] <SpacenearUS> New position from 03NOB9 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB9
[01:12] <SpacenearUS> New position from 03N0MPM-13 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N0MPM-13
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[06:15] <SpacenearUS> New position from 03ttnwiv4n after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=ttnwiv4n
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[07:38] <SpacenearUS> New vehicle on the map: 03LUX2 - 12https://tracker.habhub.org/#!qm=All&q=LUX2
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[07:50] <SpacenearUS> New position from 03DL1XH-4FSK after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DL1XH-4FSK
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[10:31] <Ben69> Hello everyone! I'm new to HAB and I'm currently designing my first payload so I have a question with regards to radio transmission. I have seen most payloads either use RTTY or Horus 4FSK. I was planning to write my own software to modulate my tracker because it's more fun than slapping on a ready library and using a couple of commands. Also
[10:31] <Ben69> because I'm doing this project to gain experience with embedded programming. What are the risks of doing this? Is it just that other people won't be able to receive my tracker's packets?
[10:38] <VK5QI> if you do enough testing to make sure your signal is compatible with existing receiver software then people shoudl be able to receive your signals fine
[10:38] <VK5QI> writing your own tracker code from scratch, you need to be careful to not have the same issues many others have had in the past
[10:39] <SA6BSS-Mike> or before flight announce the flight well and point to the rx software for people to use, that is if you want help track ofc
[10:39] <VK5QI> things like not configuring your GPS module correctly, messing up formatting of numbers in RTTY strings (e.g. leading zeros), messing up modulation settings
[10:40] <SA6BSS-Mike> to me it sounded like you where going to develop your own mode?
[10:40] <VK5QI> if its your first launch, its often a good idea to have a 'known working' tracker running alongside whatever you develop
[10:40] <SA6BSS-Mike> I seccond that!
[10:40] <VK5QI> nowdays i recommend recovering a RS41 (if there are any launching near you) and reprogramming that
[10:41] <SA6BSS-Mike> yeah, makes a good backup tracker
[10:41] <VK5QI> makes a good primary tracker too :P
[10:41] <SA6BSS-Mike> it does :)
[10:42] <VK5QI> but for sure, go and experiment - just either test it extremely well, or fly something known-good on your flight as a backup
[10:42] <VK5QI> would be nice to see another implementation of my Horus 4FSK mode :-)
[10:43] <Ben69> Yes, I am designing my own stm32 based tracker as well. It's an exercise to gain embedded experience as I want to pursue a career in embedded development. I'm not sure if I would be able to come up with something as robust as Horus, at least not for my first project
[10:44] <Ben69> But using a secondary tracker seems like a good idea
[10:45] <VK5QI> building up your own mode can be a little bit dangerous, as if you want other people to help you need to get enough other people to get set up to receive
[10:45] <VK5QI> and that means having software which can be setup easily
[10:45] <VK5QI> it took me quite a while to get to that point
[10:46] <VK5QI> Ben69: you could be the first person to launch with the Horus Binary v2 mode, which I'm hoping to add support for into Horus-GUI/horusdemodlib fairly soon
[10:49] <Ben69> Sounds exciting! I'm not sure when my tracker will be ready though, I had to redesign my PCB several times now because I had to change parts due to stock shortages. I'm currently waiting on parts
[10:49] <Ben69> I need to look into launching it alongside a known working tracker
[10:50] <VK5QI> whre are you located?
[10:50] <Ben69> You suggested recovering an RS41? Never heard of them, I assume these are regular weather balloons
[10:50] <Ben69> I'm in the UK
[10:51] <VK5QI> there are a few radiosonde launch sites in the UK. Setup a radiosonde_auto_rx station and keep an eye on tracker.sondehub.org
[10:51] <VK5QI> if you go to that page, go to the UK, and then in the settings pane (top right) enable show launch sites, you can see what launch sites are near you
[10:51] <VK5QI> and run flight path predictions for those sites
[10:51] <Ben69> Thanks, I'll take a look now! :)
[10:53] <VK5QI> https://github.com/projecthorus/radiosonde_auto_rx/wiki
[10:53] <SpacenearUS> New position from 03KD2FOU-11 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KD2FOU-11
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[10:58] <Ben69> I guess tracking one of these RS41 radiosondes could be good practice for my own payload too
[10:58] <VK5QI> yup!
[10:58] <VK5QI> thats why i recommend grabbing a few before you do your own flight
[10:58] <VK5QI> gives you some experience running around receiving radio signals while mobile
[10:59] <VK5QI> you can also feed telemetry into chasemapper ( https://github.com/projecthorus/chasemapper ) for mobile tracking
[11:10] <Ben69> I'll look into setting up a tracking station for radiosondes. I'll probably attempt to build an antenna from coat-hangers first to see if I can get any signals and then maybe buy a higher end one. I have a cheap SDR, would this be suitable or would you recommend I buy actual radio equipment?
[11:12] <VK5QI> i'd suggest the 'v3' RTLSDR
[11:12] <VK5QI> the really cheap RTLSDRs don't have stable reference oscillators which causes issues
[11:13] <VK5QI> the RTLSDRs work just fine for radiosonde and horus telemetry reception, but you want one with a stable reference oscillator (the search term to use is 'TCXO')
[11:15] <Ben69> OK, Thanks for the tips, I really appreciate it!
[11:18] <SpacenearUS> New position from 03N4XWC-1 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[14:40] <SpacenearUS> New vehicle on the map: 03W8VPV-11 - 12https://tracker.habhub.org/#!qm=All&q=W8VPV-11
[16:07] <SpacenearUS> New position from 03W8VPV-1 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W8VPV-1
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[16:57] <SpacenearUS> New vehicle on the map: 03EVA_L - 12https://tracker.habhub.org/#!qm=All&q=EVA_L
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[17:05] <SpacenearUS> New vehicle on the map: 03EVA_L_LORA - 12https://tracker.habhub.org/#!qm=All&q=EVA_L_LORA
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[17:16] <SpacenearUS> New position from 03NOB8 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=NOB8
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[17:36] <SpacenearUS> New vehicle on the map: 03KD0AWK-4 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-4
[17:37] <SpacenearUS> New vehicle on the map: 03KD0AWK-5 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-5
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[17:54] <SpacenearUS> New vehicle on the map: 03K0YTH-13 - 12https://tracker.habhub.org/#!qm=All&q=K0YTH-13
[17:55] <SpacenearUS> New vehicle on the map: 03KD0AWK-10 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-10
[17:55] <SpacenearUS> New vehicle on the map: 03KD0AWK-9 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-9
[18:54] <SpacenearUS> New vehicle on the map: 03KD0AGK-5 - 12https://tracker.habhub.org/#!qm=All&q=KD0AGK-5
[18:55] <SpacenearUS> New vehicle on the map: 03KD0AWK-14 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-14
[18:55] <SpacenearUS> New vehicle on the map: 03KD0AWK-13 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-13
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[20:54] <SpacenearUS> New vehicle on the map: 03N0SAB - 12https://tracker.habhub.org/#!qm=All&q=N0SAB
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[21:41] <SpacenearUS> New position from 03K5ENG-74 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=K5ENG-74
[21:47] <SpacenearUS> New position from 03NOB10 after 0318 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB10
[21:48] <SpacenearUS> New vehicle on the map: 03KD0GWK-4 - 12https://tracker.habhub.org/#!qm=All&q=KD0GWK-4
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[22:28] <SpacenearUS> New position from 03NOB9 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB9
[22:32] <SpacenearUS> New position from 03N0MPM-13 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N0MPM-13
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[23:22] <SpacenearUS> New position from 03N4XWC-1 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[00:00] --- Tue Aug 31 2021