Physics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..203d&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, March 1990, p. 203-206.
Physics
25
Geodesy, Global Positioning System, Troposphere, Water Vapor, Calibrating, Costa Rica, Error Analysis, Stochastic Processes
Scientific paper
Wet tropospheric path delay can be a major error source for Global Positioning System (GPS) geodetic experiments. Strategies for minimizing this error are investigted using data from CASA Uno, the first major GPS experiment in Central and South America, where wet path delays may be both high and variable. Wet path delay calibration using water vapor radiometers (WVRs) and residual delay estimation is compared with strategies where the entire wet path delay is estimated stochastically without prior calibration, using data from a 270-km test baseline in Costa Rica. Both approaches yield centimeter-level baseline repeatability and similar tropospheric estimates, suggesting that WVR calibration is not critical for obtaining high precision results with GPS in the CASA region.
Dixon Timothy H.
Kornreich Wolf S.
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