Determination of some geodynamical parameters based on the processing of LAGEOS and Etalon-1 satellite observations

Astronomy and Astrophysics – Astronomy

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Earth Rotation, Geodynamics, Orbital Elements, Satellite Observation, Satellite Orbits, Spaceborne Lasers, Equations Of Motion, Ground Stations, Secular Variations, State Vectors

Scientific paper

Attention is given to an analysis of laser observations of the LAGEOS and Etalon-1 satellites conducted to obtain refined values of satellite orbit elements, earth rotation parameters, the direct light pressure coefficient, the empirical acceleration coefficient (CT), the coordinates of 30 observation stations, several fundamental constants of geodesy and astronomy, and the secular variations J-dot(2), J-dot(3), and J-dot(4) of zonal harmonic coefficients. All solutions are characterized by a significant correlation between CT and the secular variations J-dot(n). The value J-dot(2) obtained from the combined solution is the most accurate and coincides with other solutions from LAGEOS or Starlette SLR data analysis.

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