19 votes
Accepted

Are there multiple types of UTC time?

I think there's two important ways to think of them: these are the UTC implementations; when you need to know the time now, precisely, these are the current time references you can use. Actual UTC ...
Erin Anne's user avatar
  • 11.2k
7 votes
Accepted

TLE and RINEX gps differences

They are in different reference frames. The TLE element set is defined relative to the True Equator, Mean Equinox (TEME) reference frame, and the elements in the RINEX Nav message are defined ...
DuffBeerBaron's user avatar
3 votes
Accepted

Obtaining position of GPS and GLONASS satellites from RINEX navigation files

After insightful discussion about clock corrections of both GPS and GLONASS in Ephemeris time and clock corrections in RINEX navigation files, I understood better how to deal with the information ...
Rafa's user avatar
  • 1,750
3 votes

TLE and RINEX gps differences

They are in different reference frames, but there is more to it than that. Even once you have converted TEME to ECEF, there will still be differences, because things that have the same name actually ...
Ryan C's user avatar
  • 7,942
2 votes

Ephemeris time and clock corrections in RINEX navigation files

Thanks to @NgPh's very insightful explanation, I think I could finally figure out how to correctly perform clock corrections to UTC for GPS and GLONASS RINEX navigation files. I have now completed my ...
Rafa's user avatar
  • 1,750
2 votes
Accepted

Ephemeris time and clock corrections in RINEX navigation files

What exactly are $T_{SV}$ and $T_{OC}$ ? The first is any time (e.g. the time the message was transmitted) expressed in the time system maintained by a particular satellite (Space Vehicle). The ...
Ng Ph's user avatar
  • 2,724
1 vote

PRN number in TLE files are the same in RINEX files? (in GPS constellation)

I think what's going on here is basically the same thing discussed in this question, where the two answers are "they use different coordinate systems" and "they mean different things by ...
Ryan C's user avatar
  • 7,942

Only top scored, non community-wiki answers of a minimum length are eligible