We at the Technical University Berlin are looking for experiments related to amateur radio for our next satellite TUBIN. This satellite will be launched in the second half of 2020.
We have seen the SOCIS 2019 project about SatNOGS orbit determination and we thought it might be interesting that we at TU Berlin provide support for the operational verification. I wanted to write this idea on the Orekit forum first because we have talked about OD during the Orekit Day and I felt that there is an interest for reference data for OD verification on LEO satellites (not only for SatNOGS).
Here is what we could provide:
- Reference PV data from our on-board GPS (10m, 0.1 m/s accuracy).
- Reference PV data from laser ranging OD (even more accurate than GPS).
- The means to the SatNOGS community to trigger our onboard UHF transceiver so that they can measure the Doppler shift when the satellite is passing over their ground station. We have had a Digipeater system on some of our previous satellites, it will not take us long to develop it for TUBIN. A Digipeater allows a ground station operator to trigger the onboard UHF transceiver to transmit either immediately (i.e. transponder) or with a delay (say, for a future ground station pass some minutes or hours later).
- Flight dynamics support. We are no experts in flight dynamics, but we are happy Orekit users and would be eager to contribute to the SatNOGS orbit determination and its verification.
Such an experiment would help our application for a frequency allocation in the amateur band. This is why we would like to write a joint proposal Orekit - SatNOGS - TU Berlin.
PS: we could maybe even start the SatNOGS verification with TechnoSat, which is in orbit since 2017, is referenced on SatNOGS (https://db.satnogs.org/satellite/42829/) and is being tracked by laser ranging ground stations (example of orbit determination using the Orekit Python wrapper: https://nbviewer.jupyter.org/github/GorgiAstro/laser-orbit-determination/blob/master/02-orbit-determination-example.ipynb )