Global Navigation Satellite Systems (GNSS) Real-Time Orbit Products from NASA CDDIS

Precise satellite orbits derived from analysis of Global Navigation Satellite System (GNSS) data. Analysis Centers (ACs) of the International GNSS Service (IGS) retrieve GNSS data on regular schedules to produce precise orbits identifying the position and velocity of the GNSS satellites. The orbits derived from real-time data streams are used for comparison purposes.