QZSS MICHIBIKI卫星实时轨道和钟差数据的精度评估

QZSS MICHIBIKI Real-Time Satellite Orbit and Clock Data Accuracy Assessment

以日本宇宙航空研究开发机构(JAXA)提供的精密星历为参考,对QZSS MICHIBIKI卫星发布的实时轨道和钟差数据进行了评估。数值结果表明,QZSS MICHIBIKI卫星的实时轨道精度优于11 cm,实时钟差优于0.56 ns;GPS卫星的实时轨道精度优于5 cm,实时钟差优于0.4 ns。通过比较得知,QZSS MICHIBIKI卫星的实时轨道和钟差精度明显低于GPS卫星。

This paper evaluated the accuracy of real time satellite orbit and clock broadcasted by QZSS MICHIBIKI satellite, based on the post-processing precise orbit and clock provide by Japan Aerospace Exploration Agency （ JAXA） . The numerical analysis results show that the accuracy of real-time QZSS MICHIBIKI satellite orbit and clock are 11 cm and 0.56 ns respectively; the accuracy of real-time GPS satellite orbit and clock are 5 cm and 0.4 ns respectively. So the conclusion is that the real time orbit and clock accuracy of the QZSS MICHIBIKI satellite are better than that of GPS.