In spite of the network issues experienced with the system, there were several new people who had various introductions and conversations. These are my incomplete notes from what I was able to hear.
Participants whom I was able to write down, there were several more I missed (let us know!):
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@pierros, @manthos, and another joined from hackerspace.gr
- Jan @PE0SAT from the Netherlands
- Tyson from Concordia University, Montreal, Canada. He is involved with CubeSat building and therefore ground station support. https://spaceconcordia.github.io I think.
- Dimitris, a PhD student in Columbus, Ohio (Ohio State?). From Greece.
- Glenn KJ7SU @glennl from Portland, Oregon. Involved with Portland State CubeSat program.
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@lids from Greece, but not from hackerspace.gr
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shayden (IRC nick, don’t know your mapping to username here)n
Whuzzup with all the Greeks? Space things must be in the water or something…
Pierros gave a nice status update but the audio link for me gave out after the first 30% or so. I’m sure it was update-ative Congratulations, by the way, to LibreSpaceFoundation and University of Patras people on your successful delivery of UPSat!
After a bit, the room ended up with myself (AD0CQ or etihwnad on IRC), @lids, and @PE0SAT.
We talked about some of the basic internal operation of satnogs-client and satnogs-network (pre GNU Radio changes).
Jan talked about his and DK3WN’s telemetry forwarder http://tlm.pe0sat.nl/. The system is designed to collect satellite telemetry frame data with a small amount of metadata (NORAD ID, receiver callsign, timestamp, rx lat/lon). Reception, demodulation, and decoding to a (hex) bit string are all performed outside of this system. The frames are then HTTP POST’ed to a server for storage.
There is a MS Visual Basic forwarding client at that URL. There are also some GNU Radio blocks that assemble and forward the frames start here: https://github.com/daniestevez/gr-sids.
I found Jan’s observation about new people to satellites to be interesting. Most have good IT-type skills and have no problems with those aspects of a system. It is a lack of RF knowledge that seems to be common. Antennas, noise figure, filtering, matching, doppler, etc (Dan: traditional ham stuff?). Jan’s excellent website makes him a magnet for questions and advice from new cubesat teams. It is difficult to substitute the experience of receiving signals from space with a handheld radio and simple antenna.
I wonder if something like HAMPADS would be a good entry point. The mobile tracking app and “arm-strong” rotator are a really creative solution.
Another discussion area was where or what interfaces to standardize and where to explicitly avoid standards to allow innovation within a ground system. No conclusions for sure there!
IMHO, this is an area that the SatNOGS community can drive in cooperation with other existing G/S users. The SatNOGS contribution is then a) the documented standards, and b) a reference implementation with examples interfacing to other common systems (like GEMS, and other common CCSDS standards)
Please correct my mistakes if you were there also!
–Dan