1. GPS orbit determination;Abbot,1986
2. GPS carrier phase ambiguity resolution over long baselines;Bender,1985
3. High precision GPS orbit determination using March 1985 demonstration data;Bertiger,1986
4. Evaluation of the March 1985 high precision baseline (HPBL) test: Fiducial point concept versus free network solutions;Beutler;Eos Trans. AGU,1986
5. Bierman, G. J., , Factorization Methods for Discrete Sequential Estimation, Academic, Orlando, Fla., 1977,