Precise Orbit Determination of GPS Satellites for Real Time Applications

Details Precise Orbit Determination of GPS Satellites for Real Time Applications Precise Orbit Determination of GPS Satellites for Real Time Applications

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jass...18..129l&link_type=abstract

Journal of Astronomy and Space Science, vol. 18, no. 2, p. 129-136

Astronomy and Astrophysics

Astronomy

Igs, Igu, Ultra Rapid Product

Scientific paper

The accuracy of GPS applications is heavily dependent on the satellite ephemeris and earth orientation parameter. Specially applications like as the real time monitoring of troposphere and ionosphere require real time or predicted ephemeris and earth orientation parameter with very high quality. IGS is producing IGS ultra rapid product called IGU for real time applications which includes the information of ephemeris and earth orientation. IGU is being made available twice everyday at 3:00 and 15:00 UTC and covers 48 hours. The first 24 hours of it are based on actual GPS observations and the second 24 hours extrapolated. We will construct the processing strategy for yielding ultra rapid product and demonstrate the propriety through producing it using 48 hours data of 32 stations.

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