Statistics
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2175c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 19, p. 2175-2178
Statistics
10
Error Analysis, Global Positioning System, Mathematical Models, Poseidon Satellite, Position (Location), Position Errors, Topex, Gravitational Effects, Laser Range Finders, Satellite Altimetry, Time Series Analysis
Scientific paper
We have compared Global Positioning System (GPS)-based dynamic and reduced-dynamic TOPEX/Poseidon orbits over three 10-day repeat cycles of the ground-track. The results suggest that the prelaunch joint gravity model (JGM-1) introduces geographically correlated errors (GCEs) which have a strong meridional dependence. The global distribution and magnitude of these GCEs are consistent with a prelaunch covariance analysis, with estimated and predicted global rms error statistics of 2.3 and 2.4 cm rms, respectively. Repeating the analysis with the post-launch joint gravity model (JGM-2) suggests that a portion of the meridional dependence observed in JGM-1 still remains, with global rms error of 1.2 cm.
Christensen Edward J.
Haines Bruce J.
McColl K. C.
Nerem Steven R.
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