Towards GPS orbit accuracy of tens of centimeters

Details Towards GPS orbit accuracy of tens of centimeters Towards GPS orbit accuracy of tens of centimeters

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..215l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, March 1990, p. 215-218.

Physics

9

Earth Crust, Geodetic Accuracy, Geodynamics, Global Positioning System, Satellite Orbits, Satellite Tracking, Solar Radiation, Stochastic Processes, Tracking Networks

Scientific paper

In this paper, CASA Uno orbit results are presented utilizing data from four continents. Refinements in orbit modeling, combined with the availability of a worldwide tracking network and the dense distribution of tracking sites in North and South America, have improved orbit determination precision to about 60 cm (per component) for four of the seven GPS satellites tracked in CASA Uno. The orbit results are consistent with California baseline repeatabilities, which are at the few mm level in horizontal and length, and 1-2 cm in the vertical. Baseline comparisons with VLBI provide a measure of orbit accuracy, showing sub-cm agreement in length and 1.5 cm agreement in the horizontal.

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