Physics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..651m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, April 1990, p. 651-654.
Physics
3
Autonomous Spacecraft Clocks, Geodetic Accuracy, Geodetic Surveys, Global Positioning System, Algorithms, Central America, Data Correlation, Geodynamics, South America
Scientific paper
The GPS carrier beat phase data collected by the TI4100 GPS receiver have been successfully utilized by the U.S. Defense Mapping Agency in an algorithm which is designed to estimate individual absolute geodetic point positions from data collected over a few hours. The algorithm uses differenced data from one station and two to four GPS satellites at a series of epochs separated by 30-sec intervals. The precise GPS ephemerides and satellite clock states, held fixed in the estimation process, are those estimated by the Naval Surface Warfare Center. Broadcast ephemerides and clock states are also utilized for comparative purposes. An outline of the data corrections applied, the mathematical model, and the estimation algorithm are presented. Statistical assessment of 114 GPS point positions at 11 CASA Uno stations indicates that the overall standard deviation of a point position component, estimated from a few hours of data, is 73 cm.
Jensen Peter A.
Malys Stephen
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