利用星载GPS观测数据确定海洋2A卫星cm级精密轨道

基金项目: 国家863计划资助项目(2012AA12A301);中央高校基本科研业务费专项资金资助项目(2012618020201);中国科学院精密导航定位与定时技术重点实验室开放研究基金资助项目(2012PNTT06)

详细信息

Centimeter Level Orbit Determination for HY2A Using GPS Data

1 GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China;
2 School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

摘要: 系统研究了基于国产星载双频GPS接收机的海洋2A(HY2A)卫星精密定轨问题,并对星载双频GPS接收机天线相位中心进行了校正。结果显示,HY2A卫星径向定轨精度可达1~2cm,天线相位中心标定精度为mm级。相关成果可应用于我国后续所有搭载双频GPS接收机的对地观测卫星计划。
- 海洋2A卫星 /
- 星载GPS接收机 /
- 精密定轨 /
- 天线相位中心变化 /
- SLR
Abstract: The first Chinese oceanographic satellite——HY2A was lanched on 16 August 2011 into a sun-synchronous orbit with an altitude of about 970 km.Precise orbit determination(POD) for HY2A is essential for the scientific applications of this mission.With the precision and navigation data analyst(PANDA) software,the precise orbits for HY2A are determined using only onboard GPS observations,meanwhile GPS data are used to model the consistent phase center offset(PCO) and phase center variation(PCV) of onboard receiver antenna.The orbit accuracy is assessed using a number of tests,which include analysis of observation residuals,orbit fits with CNES orbits,and satellite laser ranging residuals.The results show that 1~2 cm radial orbit accuracy for the HY2A has been achieved.These contributions could be used for continued low-earth orbiters(LEO) equipped indigenous onboard GPS receiver.
- HY2A /
- onboard GPS receiver /
- precise orbit determination /
- PCV /
- SLR