TY  - RPRT
TI  - Gravity field improvement using global positioning system data from TOPEX/Poseidon - A covariance analysis
AU  - Bertiger, Willy I.
AU  - Wu, J. T.
AU  - Wu, Sien C.
PY  - 1992
UR  - https://ntrs.nasa.gov/citations/19920042323
ID  - 19920042323
ER  -