Mathematics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981esasp.160...25w&link_type=abstract
In ESA Spacecraft Flight Dyn. p 25-35 (SEE N82-14123 05-12)
Mathematics
1
Gravitational Fields, Ground Stations, Orbital Position Estimation, Satellite Drag, Satellite Tracking, French Satellites, Geos 1 Satellite, Geos 3 Satellite, Lageos (Satellite), Laser Range Finders, Magnetic Storms, Mathematical Models
Scientific paper
The effect on orbit calculation of the spatial, temporal and geographical distribution of laser data and of different perturbation models was investigated. Selected data arcs of geodetic satellites were analyzed. The data were used to determine simultaneously for the orbit the coordinates of two laser stations and the effect of atmospheric drag and gravity field models on orbit determination. The positional accuracy of the LAGEOS, Starlette, and GEOS 3 satellites is evaluated. Truncating the GEM 9 gravitational field model up to order and degree 13, yields position differences of 15 cm for LAGEOS while GEM 103 gives position differences 1m along track. For GEOS 3 and Starlette, position differences of of 4.5 m radial and 17 m along track are shown between the two models. Atmospheric drag modeling for GEOS 3 shows an along track position error of 30 m for an arc in which a geomagnetic storm occurred.
Ambrosius A. C. B.
Wakker K. F.
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