倾斜地球同步轨道SAR卫星星载GNSS定轨分析  

Analysis of orbit determination for inclined geosynchronous SAR using spaceborne GNSS data

作　　者：杨鹏 王振兴 田晓彬 郑世贵[5] 黄勇[1,2,6,7] YANG Peng;WANG Zhenxing;TIAN Xiaobin;ZHENG Shigui;HUANG Yong(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Remote Sensing Satellite,CAST,Beijing 100094,China;Space Star Technology Co.,Ltd.,Beijing 100000,China;Institute of Spacecraft System Engineering,Beijing 100094,China;Shanghai Key Laboratory of Space Navigation and Positioning Techniques,Shanghai 200030,China;Key Laboratory of Planetary Sciences,Chinese Academy of Sciences,Shanghai 200030,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院大学天文与空间科学学院,北京100049 [3]中国空间技术研究院遥感卫星总体部,北京100094 [4]航天恒星科技有限公司,北京100000 [5]北京空间飞行器总体设计部,北京100094 [6]上海市空间导航与定位技术重点实验室,上海200030 [7]中国科学院行星科学重点实验室,上海200030

出　　处：《测绘学报》2024年第12期2305-2315,共11页Acta Geodaetica et Cartographica Sinica

基　　金：科工局民用航天技术预先研究项目(D010105);中国科学院战略性先导科技专项(XDA30040500;XDA0350404);国家重点研发计划(2020YFC2200903)。

摘　　要：随着高轨卫星的广泛应用,其轨道精度需求越来越高。本文基于星载GNSS测量,仿真分析了位于倾斜地球同步轨道的SAR卫星定轨精度。结果表明,在满足信号可见性的条件下,IGSO卫星可见GPS+BDS导航星数平均约20颗,PDOP值在1~2之间;利用星载GNSS伪距/载波相位测量值可以得到优于1 m的高轨SAR卫星定轨精度,高阶勒让德误差波动小于10 mm;太阳辐射压摄动对轨道影响较大,10^(-8)m·s^(-2)量级的模型误差最大可使定轨精度降低一个量级。With the widespread application of high orbit satellites,the demand for their orbital accuracy is becoming increasingly high.Based on the spaceborne GNSS(global navigation satellite system)data,we simulate an inclined geosynchronous SAR satellite,and analyze the orbit determination accuracy.The results show that the high sensitivity onboard receiver can obtain the signal of about 20 satellites which include GPS and BDS,with PDOP(position dilution of precision)values ranging from 1 to 2.By using the pseudo range/carrier phase measurement values of spaceborne GNSS data,the orbit determination accuracy of inclined geosynchronous SAR satellites can be better than 1 m,and the fluctuation of high-order Legendre error is less than 10 mm.The perturbation of solar radiation pressure has a significant impact on the orbit,the model error of the 10^(-8) m·s^(-2) order can reduce the orbit determination accuracy by one order of magnitude.

关 键 词：高轨卫星 星载GNSS IGSO SAR卫星 精密定轨 

分 类 号：P228[天文地球—大地测量学与测量工程]