The Integration of Collocated GPS, VLBI and SLR Results

Linlin Ge, Horng-Yue Chen, Shaowei Han, Chris Rizos, Francesco Vespe and Stefan Riepl

Abstract:	In recent years space geodetic techniques such as the Global Positioning System (GPS), Very Long Baseline Interferometry (VLBI), and Satellite Laser Ranging (SLR) have been collocated to address many applications in geoscience. While results from all these techniques are contaminated by various biases and errors, a common- mode signal has been found among the collocated results of GPS, VLBI and SLR. An adaptive filter based on the Least-Mean-Square algorithm is proposed to integrate these techniques, i.e. to extract this common-mode signal by inputting to the filter the GPS result as the primary sequence and VLBI and/or SLR results as the reference sequences. Numerical simulation indicates that the filter is a powerful signal decomposer, which can separate the primary input into coherent- and incoherent-components relative to the reference input. Data from the Matera Station in Italy and the Wettzell Station in Germany have been used to test the algorithm. The derived common- mode signal has better repeatability than the individual results of GPS, VLBI and SLR.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	1525 - 1535
Cite this article:	Ge, Linlin, Chen, Horng-Yue, Han, Shaowei, Rizos, Chris, Vespe, Francesco, Riepl, Stefan, "The Integration of Collocated GPS, VLBI and SLR Results," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 1525-1535.
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