33 ms·
Active transponders on the satellite itself. GPS fixes. Other observations from the satellite. Controlling the target makes some problems a lot easier.
by DuskStar 7y ago
Active transponders on the satellite itself. GPS fixes. Other observations from the satellite.
Controlling the target makes some problems a lot easier.
- SiempreViernes 7y agoGPS appears to not give great online performance in LEO[1], and transponders is just slightly easier radar, not a fundamental difference. Do they have really good star trackers on their sats? [1]: https://space.stackexchange.com/questions/563/in-leo-what-is-the-precision-of-gnss-based-position-compared-to-traditional-met https://space.stackexchange.com/questions/563/in-leo-what-is...
- dtkav 7y agoThey don't need great online performance, they need offline performance for orbit determination. Once they have a good orbit fit, they will propagate it to predict the probability of collision a few days in advance.