YUKONSAT, AURORASAT and EX-ALTA-2 have less as they transmit at the same frequency.
NEUDOSE has more as the team has been in contact with us asking for support.
To station owners, feel free to schedule but have in mind to leave some slots open for ISS, as we use its TLE for tracking the satellites above.
Welcome and thank you for pointing out to this link.
The information shared via the link is confusing, DTMF is most of the time used to command a device, in this case a satellite, but what kind of data is send by LIGHTCUBE?
My first guess is, that this is some kind of RTTY signal.
Please update the site information so the community can also support the team with decoded data.
Hi Jan-
We’re working on adding details on the decoding. The telemetry is AFSK Bell 103. There seems to be no default mode in SatNogs to work with non 1200 baud AFSK data. We have a flow graph that will do this decoding and would like to integrate it into SatNOGS (Satellite Operator Guide - SatNOGS Wiki) but I am not clear on whether there are development rules for what must be included in a flow graph. Are we permitted to use out-of-tree modules (gr-satellites, specifically?). We have a gr-satellites based flowgraph and a custom, the gr-satellites performs a little better.
@lmberkhout
I received on the given satellite frequency LightCube signal which probably resembles bell103. I subjected it to decoding in minimodem and received such a sequence of bytes. Am I on the right way or is it nonsense ?
I spent all evening trying the strongest packets I could find from SatNogs Observations with minimodem, GNU Radio, and anything else I could find. Nothing conclusive, though - need to know what a valid packet should look like.
If the team can share the GNU Radio flowgraph that they’re using, it’ll be a huge help.
Zoomed in on NEUDOSE during the U.S. pass just ending here around 1608utc but unfortunately no signals were seen. The pass tomorrow around this same time is even higher, so will certainly keep looking!
Hi @tomasz and @K4KDR
Here’s the github repo with our .grc file (GitHub - ASU-cubesat/lightcube_telemetry: Repository for the downlink of the Amateur LightCube Satellite Telemetry). Apologies, my prior message was not correct in stating that we have a non gr-satellites based version, I use gr-satellites blocks in all versions of our .grc decoders right now. Please note this is a work in progress but should give the correct output data. We’ll add a link to the packet definition soon, it should be included on the LightCube website shortly.
