人卫激光测距中卫星预报需求分析

Satellite prediction in satellite laser ranging

人造卫星激光测距作为当前精度最高的现代大地测量手段之一,其观测数据在卫星或航天器的精密定轨、确定地球自转参数、建立和维护全球地球参考框架以及实现全球范围的高精度时间传递等方面发挥重要作用。在轨卫星的位置预报是卫星激光测距工作实现的前提和基础,为此,本文根据卫星激光测距工作的实际需要对在轨卫星的预报精度提出了要求,并分析CPF卫星预报的精度。研究结果显示,卫星预报精度完全可以满足当前毫米级卫星激光测距的要求。

Satellite Laser Ranging （SLR） is one of the most precise modem geodesy technologies. Its data play an important role in precise orbit estimation of satellite and aircraft, and determination of earth rotating parameters. It is vital for establishing and maintaining earth reference system, highly precise time transferring all over the world and so on. Kowning that satellite prediction is the base of satellite laser ranging, the paper presented the precision needs of position and time of satellite prediction and analyzed the differences of IRV and CPF satellite prediction formats. Results indicated that both two methods Can satisfy SLR but the CPF is better than IRV in prediction.