1. Atmospheric angular momentum fluctuations, length-of-day changes and polar motion;Barnes,1983
2. NAVSTAR/Global Positioning System (GPS), (I);Bauersima,1983
3. GPS Precise Tracking of Topex/Poseidon: results and implications;Bertiger,1994
4. The International GPS Service for Geodynamics (IGS): Development and Start of Official Service on January 1, 1994;Beutler,1994
5. Combining the Orbits of IGS Processing Centers;Beutler,1995