Precise orbit determination of the satellite 'Starlette' with laser ranging data

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Celestial Geodesy, Earth Rotation, Laser Range Finders, Orbital Position Estimation, Satellite Orbits, Satellite Tracking, Aerodynamic Drag, Gravitational Effects, Lageos (Satellite), Position Errors, Satellite Drag, Satellite Perturbation

Scientific paper

A 200-day arc (1976 Oct. 1 - 1977 Apr. 19) of world-wide, continuous laser ranging data of the satellite Starlette is used for a precise orbit determination. Perturbations due to the figure of the earth, atmospheric drag, lunar and solar gravitations, solar radiation pressure, solid earth tides and ocean tides were taken into account in the 200-day long-arc solution. The air drag coefficient and its daily rate are estimated. The earth's rotation parameters during the period are deduced. It is concluded that, if the laser tracking is sufficiently uniform along the entire orbit, then the 5-day arc solution can reach a decimeter accuracy and the laser ranging data on Starlette can complement those on LAGEOS in a precise evaluation of the earth's rotation parameters.

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