1. GPS Control/User Segments, Vol I, Introduction and Summary
2. GPS Final Report, Part I, Vol A, Introduction and Summary
3. “CELEST Orbit Determination Program,” NSWC/DL Technical Report
4. Buonaguro , A. “An Algebraic Technique for the Generation of Dynamic Partial Derivatives in Orbit Computation,”
5. Anderle , Richard J. Tanenbaum , Mark G. “Practical Realization of a Reference System for Earth Dynamics by Satellite Methods,” August 1974