C/C++ version of the orbit models used with TLE data.
Source code for astronomical calculations, including satellite orbits.
See also https://github.com/Bill-Gray/sat_code/ which is licensed under the GPL V2.
The site contains the information concerning the GLONASS and GPS current orbital constellations, Earth maps of the current and daily navigation availabilities, results of the GNSS navigation fields monitoring in Moscow area in a real-time mode and a numbe