Evaluation of strategies for the ultra-rapid orbit prediction of BDS GEO satellites
作者机构：GNSS Research CenterWuhan UniversityWuhanChina Northern Information Control Research Academy Group Co.Ltd.NanjingChina
出 版 物：《Geo-Spatial Information Science》 (地球空间信息科学学报（英文）)
年 卷 期：2023年第26卷第1期
页 面：16-30页
核心收录：
学科分类：0810[工学-信息与通信工程] 08[工学] 0708[理学-地球物理学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术]
基 金：supported by the National Natural Science Foundation of China[grant number:41904021]
主 题：BDS GEO satellites orbit prediction solar radiation pressure model
摘 要：The quality of BeiDou Navigation Satellite System(BDS)Geostationary Earth Orbit(GEO)ultrarapid products is unsatisfactory because GEO satellites are nearly stationary relative to ground *** optimize the quality of these ultra-rapid orbit products,we investigated the effects of the fitting arc length,an a priori Solar-Radiation Pressure(SRP)model,and the along-track empirical acceleration on the prediction of BDS GEO satellite *** predicted orbit arcs of 24-h were evaluated through comparisons with the corresponding observed orbit arc and Satellite Laser Ranging(SLR)*** both eclipse and non-eclipse seasons,accuracy of the orbit predictions obtained using a 48-h fitting arc length were better than those obtained using 24-h and 72-h fitting arc *** the overlapping precision of predicted orbits exhibited no obvious improvement when an a priori SRP model was employed,the systematic bias in the SLR residuals was significantly ***,the mean value of SLR residuals decreased from−0.248 m to−0.024 m during non-eclipse seasons and from−0.333 m to−0.041 m during eclipse seasons,*** addition,when an empirical acceleration in the along-track direction was introduced,the three-Dimensional Root-Mean-Square(3D RMS)of overlapping orbits during eclipse seasons decreased from 2.964 to 1.080 m,which is comparable to that during non-eclipse ***,the Standard Deviation(STD)of SLR residuals decreased from 0.419 to 0.221 m during eclipse *** analysis of SRP estimates shows that the stability of SRP parameters was significantly enhanced after the introduction of along-track empirical acceleration in eclipse *** optimal BDS GEO ultra-rapid orbit prediction products were yielded by using a 48-h fitting arc length,an a priori SRP model and an along-track empirical acceleration.
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