摘要
利用IGS提供的IGU星历进行山基GPS掩星预报。实例分析证明,利用IGU星历计算的卫星位置精度比利用广播星历计算的卫星位置精度高两个数量级,预报掩星和实际观测的掩星在时间上只相差1 s,方位上基本相同,因此可以更加准确地进行掩星预报。
The method in mountain-based obscuration prediction by using IGU ephemeris offered from IGS is introduced by using the broadcast ephemeris and IGU ephemeris to compute. The comparison between the computation results of the positions of sitellite shows that the latter＇ s accuracy is higher than the former by two magnitudes. The obscuration prediction differing from the obscuration observation is only 1 s in time and the positions of obscuration are the same. So we can forecast obscuration more exactly in this way.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第5期129-131,137,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40774031)
国家863计划项目(2006AA06A202)
全国优秀博士学位论文作者专项基金(200344)
关键词
山基GPS
IGU星历
掩星预报
卫星位置
广播星历
mountain-based GPS
IGU ephemeris
obscuration prediction
positions of satellite
broadcast ephemeris
