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Estimation of the ERPs based on GPS data and the analysis of the impact factor
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|Authors:||Wang Xinjing; Yuan Yunbin; Tan Bingfeng; Song Min; Liu Teng|
|Author Affiliations:||Primary: |
Chinese Academy of Sciences, Institute of Geodesy and Geophysics, Wuhan, China
University of Chinese Academy of Sciences, China
|Volume Title:||Dadi Celiang yu Diqiu Dongli Xue Journal of Geodesy and Geodynamics|
|Source:||Dadi Celiang yu Diqiu Dongli Xue = Journal of Geodesy and Geodynamics, 36(10), p.902-906. Publisher: Gai Kan Bianjibu, Wuhan, China. ISSN: 1671-5942|
|Note:||In Chinese with English summary. 11 refs.; illus., incl. 2 tables|
|Summary:||ERP is a necessary parameter in the transformation between the ITRF and ICRS. The paper introduces a method of solving the ERP parameters based on GPS data. First, about 100 global uniform and stable distributed IGS stations are selected for the calculation of the solution, and then we make comparisons between the solution sequence from the experiment and the IGS final-solution sequence. Second, we analyze the impact factor of the solution quality from the aspect of experimental data and mathematical derivation during processing, including the constraints for the orbit, the precision of the prior ERP information, and the quantity of the chosen station. We then make a proposal for improving the ERP solution quality based on the analysis: freely constrain the four periodic dynamic parameters in the directions D, Y of ECOM model, and the strongly constrained stochastic pulse can achieve a better result. The key to reducing the influence of the prior information in the processing is to improve the precision of predicted UT1-UTC; 100 stations in the processing is a good choice to achieve the best efficiency and quality in the calculation.|
|Subjects:||Earth; Geodesy; Global navigation satellite systems; Global Positioning System; Numerical analysis; Rotation|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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