基于光学测角数据的风云四号同步轨道卫星精密定轨  

Precise orbit determination of FY-4 synchronous orbit satellite based on optical angle measurement data

作　　者：刘思语 黄勇[1,2] 毛银盾 贾耀红[4] 鲁文强[1,2,4] 黄乘利 郑景辉[1] 杨鹏[1,2] LIU Siyu;HUANG Yong;MAO Yindun;JIA Yaohong;LU Wenqiang;HUANG Chengli;ZHENG Jinghui;YANG Peng(Shanghai Astronomical Observatory,Chinese Academy of Science,Shanghai 200030,China;School of Astronomy and Space Science,University of Chinese Academy of Science,Beijing 100049,China;School of Physical Science and Technology,Shanghai Tech.University,Shanghai 201210,China;National Satellite Meteorological Centre,Beijing 100081,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]上海科技大学物质学院,上海201210 [4]国家卫星气象中心,北京100081

出　　处：《中国空间科学技术》2021年第6期54-62,共9页Chinese Space Science and Technology

基　　金：国家自然科学基金(U1931119)。

摘　　要：针对风云四号同步卫星的精密定轨和精度评估需求,首先利用地面光学测角数据对FY-4A卫星进行精密定轨,定轨后方位角和高度角的残差rms分别为0.25"和0.45"。与基于测距数据的轨道相比,位置精度在有测角数据的弧段内小于50 m。进一步联合测角数据和测距数据对FY-4A卫星进行联合定轨,定轨后轨道重叠精度优于15 m。利用联合定轨结果评估了基于测距数据的实时轨道产品精度,可以明显发现轨道精度随着测距数据的积累而逐步提高。In response to the precise orbit determination and accuracy evaluation requirements of the FY-4 synchronous orbit satellite,the ground optical angle measurement data were firstly used to perform precise orbit determination on the FY-4A satellite.The root mean square of the azimuth and altitude residuals are 0.25″and 0.45″respectively.Compared with the orbit determination based only on ranging data,the position accuracy is less than 50 m in the arc with angle measurement data.The FY-4A satellite orbit was further jointly determined with combined angle measurement data and ranging data,and the orbit overlap accuracy was improved significantly to be better than 15m.Compared with the results of joint orbit determination,the accuracy of real-time orbit products based on only ranging data was evaluated.It is shown obviously that,with the accumulation of ranging data,the orbit accuracy can be gradually improved,e.g.,the precision of orbit determination with ranging data can be gradually stabilized to about 20m in 6h.

关 键 词：精密定轨 光学测角 CCD漂移扫描 同步轨道卫星 风云四号 

分 类 号：P228[天文地球—大地测量学与测量工程]