星载GPS的毫米级编队卫星相对定位

在比较分析编队卫星相对定位与陆地相对定位技术的基础上,结合陆地相对定位技术和卫星精密定轨技术提出了基于GPS进行编队卫星相对定位的方法及原理.文章采用2004年4月1日到10日的GRACE卫星实测数据进行了相对定位计算,并采用KBR观测数据对本文相对定位结果和JPL单独定轨结果进行了外部检核,检核结果表明:1. 与直接采用单独定轨结果相比,该方法可以明显提高卫星的相对位置精度.2. 利用本文方法计算的两颗GRACE卫星相对位置精度约为4.5 mm.

Millimeter-Level Relative Positioning of Formation Flying Satellites Onboard GPS

Based on the comparison and analysis of the technique of formation flying satellites relative positioning and terrestrial relative positioning,the method of formation flying satellites relative positioning using GPS is put forward by combining the technique of terrestrial relative positioning and satellite orbit determination. Relative positioning of two GRACE satellites are computed by using the GPS data observed from April 1 to 10, 2004. The results of our relative positioning and the orbits of JPL which computed separately are independently validated with k-band ranging (KBR) data. By comparison and analysis, we find that compared with the results of individual satellite orbit determination, the precision of satellites relative positioning can be improved obviously when using our method. We also find that the precision of two GRACE satellites relative positioning using our method can get 4.5 mm.