重力卫星星载GPS简化动力学精密定轨  

Reduce-dynamic Orbit Determination for Gravity Satellite Based on GPS

作　　者：王跃 张德志 张帆 WANG Yue;ZHANG Dezhi;ZHANG Fan(College of Geomatics, Shandong University of Science and Technology, Qingdao Shandong 266590, China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590

出　　处：《北京测绘》2020年第4期556-560,共5页Beijing Surveying and Mapping

摘　　要：利用GRACE和SWARM重力卫星星载GPS观测数据,基于简化动力学方法进行精密定轨,通过相位观测值残差分析、重叠轨道对比和科学轨道对比进行轨道精度检核。GRACE和SWARM卫星相位观测值残差RMS值稳定在6 mm左右,重叠轨道对比差值RMS在径向、切向和法向均优于1.24 cm;通过与GFZ和ESA提供的GRACE卫星与SWARM卫星精密轨道对比,GRACE卫星简化动力学轨道在R,T,N方向的轨道精度分别达到1.3 cm、2.1 cm和1.3 cm;SWARM卫星简化动力学轨道在径向、切向和法向的轨道精度分别达到0.8 cm、1.3 cm和1.6 cm。实验表明,基于简化动力学方法,GRACE和SWARM卫星定轨精度均到达厘米级。Using satellite-based GPS observation data of GRACE and SWARM gravity satellites,the precise orbit determination is carried out based on the reduce dynamic method,and the orbit accuracy is checked by residual analysis of phase observations,overlapping orbit comparison and scientific orbit comparison.The residual RMS values of phase observations of GRACE satellite and SWARM satellite are stable around 6mm,and the overlapping orbit contrast difference RMS is better than 1.24 cm in radial,tangential and normal directions.Compared with the precision orbits of GRACE satellite and SWARM satellite provided by GFZ and ESA,the orbit accuracy of GRACE satellite reduce-dynamic orbit in radial direction,tangential direction and normal direction reaches 1.3 cm,2.1 cm and 1.3 cm respectively.The orbit accuracy of SWARM satellite reduce-dynamic orbit in radial direction,tangential direction and normal direction is up to 0.8 cm,1.3 cm and 1.6 cm,respectively.Experiments show that based on the simplified dynamics method,the accuracy of the orbit determination of GRACE and SWARM satellites reaches the centimeter level.

关 键 词：重力卫星 星载全球定位系统(GPS) 简化动力学 精密定轨 

分 类 号：P228.4[天文地球—大地测量学与测量工程]