1. Hoffmann-Wellenhof, B., Lichtenegger, H., and Collins, J.: 1993, GPS: Theory and Practice, Springer-Verlag, Wien and New York.
2. Lundberg, J.B.: 1985, ?Computational errors and their control in the determination of satellite orbits?, CSR-85-3, March 1985, Univ. of Texas at Austin, Center for Space Research.
3. Lundberg, J.B., Schutz, B.E., Fields, R., and Watkins, M.: 1991, ?Application of Encke's method to long arc orbit determination solutions?, J. Guid. Control Dyn. 14 (3), 683?686.
4. McCarthy, D.: 1996, ?IERS Conventions (1996)?, IERS Tech. Note 21, Obs. de Paris.
5. Melbourne, W., Davis, E., Yunck, T., and Tapley, B.: 1994, ?The GPS flight experiment on TOPEX/POSEIDON?, Geophys. Res. Lett. 21, 2171?2174.