GRACE卫星非差精密定轨精度分析

发布时间：2018-03-01 00:29

本文关键词： 星载GPS LEO卫星弱动力法运动学法精密定轨　出处：《测绘科学》2017年01期 　论文类型：期刊论文

【摘要】：随着星载GPS接收机性能和精密轨道、钟差产品精度的提高,星载GPS观测技术已成为确定CHAMP、GRACE和GOCE等低轨卫星精密轨道的重要手段。文章以GRACE卫星为例,分别利用非差弱动力法和非差运动学方法精密确定其轨道,并将结果和美国喷气动力实验室(JPL)事后精密轨道对比。结果表明:GRACE卫星非差弱动力法和非差运动学定轨精度均可达到厘米级;在使用相同的星历、钟差等产品时,弱动力法定轨精度略微优于运动学方法。此外,本文采用超快预报精密星历实时确定GRACE卫星轨道时精度也优于10cm。
[Abstract]:With the improvement of the precision of satellite GPS receiver and precision orbit, spaceborne GPS observation technology has become an important means to determine the precision orbit of low orbit satellites such as champ Grace and GOCE. This paper takes GRACE satellite as an example. The orbit of the orbit is precisely determined by the non-differential weak dynamic method and the non-differential kinematics method, respectively. The results are compared with those of JPL (American Jet Power Laboratory). The results show that the precision of orbit determination by the non-differential weak dynamic method and kinematics of the w Grace satellite can reach the centimeter level, and when using the same ephemeris, clock difference and other products, the accuracy of orbit determination can be reached in centimeter order, when using the same ephemeris, clock error, etc. The orbit accuracy of weakly dynamic orbit method is slightly better than that of kinematics method. In addition, the precision of using ultra-fast prediction precision ephemeris to determine the orbit of GRACE satellite in real time is also better than that of 10 cm.
【作者单位】：武汉大学测绘学院;中国科学院遥感与数字地球研究所;
【分类号】：P228.4

【相似文献】