Subjects: Astronomy submitted time 2023-12-13 Cooperative journals: 《天文学进展》
Abstract： The Earth orientation parameters (EOP) is the bridge between the Earth refer#2;ence frame and the geocentric celestial reference frame, and it is an indispensable important parameter in the process of satellite precise orbit determination. Taking the EOP parameters provided by the International Earth Rotation Service and the Shanghai Astronomical Ob#2;servatory as examples, this paper analyzes the relationship between the orbit determination residuals, orbit determination accuracy, and EOP prediction capability under the Beidou-3 regional network observation mode and the satellite-ground inter-satellite joint observation mode. The research shows that for the products provided by IERS, the prediction error has little effect on the orbit determination accuracy of the regional station-only orbit deter#2;mination model, but its 10-day prediction error has an decimeter-level impact on the orbit determination accuracy of the satellite-Earth-satellite joint orbit determination model. For the products provided by the Shanghai Astronomical Observatory, the orbit determination accuracy of the two orbit determination modes gradually decreases with the increase of the EOP forecast days. In addition, the orbit determination accuracy of different products in the satellite-Earth inter-satellite joint orbit determination mode is smaller than that in the orbit determination mode only under regional network monitoring, indicating that the addition of inter-satellite links can reduce the EOP of satellite orbit determination. Dependence on forecast errors. This research is of great significance to the realization of satellite precise orbit determination engineering under regional observation conditions.
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