Accuracy aspects of recent laser station positioning experiments

Physics

Scientific paper

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Geodynamics, Lageos (Satellite), Laser Range Finders, Accuracy, Coordinates, San Andreas Fault, Tectonics

Scientific paper

Over the past few years, the contribution of the European laser ranging systems to the total amount of global observations of the LAGEOS geodynamics satellite has increased considerably. In the studies described in this paper selected samples of the data are used to derive the positions of the European stations within the framework of a global coordinates solution and to determine accurate baselines between these stations. Recent improvements in the dynamic models of the motion of the earth and LAGEOS, and the high quality of the laser data, are shown to result in monthly global coordinate solutions with a consistency of better than 5 cm. The repeatability of monthly solutions of the European baselines is demonstrated to be even better than 3.5 cm. A combined global station coordinate solution is presented, based on the tracking data of the first three months of 1986 and denoted by DUT/SOM LSC 87.1. Also the effects of tectonic plate motions are shown to be detectable from the analysis of data covering a period of less than 2 years. The results for the baseline from Monument Peak to Quincy, which crosses the San Andreas fault, are highlighted.

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