TY - RPRT TI - Precise Point Positioning for the Efficient and Robust Analysis of GPS Data From Large Networks AU - Zumberge, J. F. AU - Heflin, M. B. AU - Jefferson, D. C. AU - Watkins, M. M. AU - Webb, F. H. PY - 1997 UR - https://ntrs.nasa.gov/citations/19990008059 ID - 19990008059 ER -