1. Extra-widelaning for on the fly ambiguity resolution: Simulation of ionospheric effects;Abidin,1990
2. Interferometric determination of GPS satellite orbits;Abbot,1985
3. Earth rotation from radio interferometric tracking of GPS satellites;Abbot,1988
4. Ionospheric modeling enhances ambiguity resolution in GPS orbit and baseline determination;Abbot;Eos, Trans. Am. Geophys. U.,1989
5. Determination of GPS orbits and analysis of results;Abusali,1986