TY - RPRT TI - Altimeter crossover methods for precision orbit determination and the mapping of geophysical parameters AU - Shum, C. K. AU - Schutz, B. E. AU - Tapley, B. D. AU - Zhang, B. H. PY - 1990 UR - https://ntrs.nasa.gov/citations/19910025780 ID - 19910025780 ER -