低仰角大气折射误差对初轨精度的影响分析

针对在交会对接任务中测量船使用的电波折射经验模型存在低仰角跟踪测量修正精度差的问题提出改进思路,在模型中引入基于天顶延迟的拟合算法优化修正模型,提高了船载雷达低仰角跟踪时距离的修正精度,满足了测量船数据处理的精度需求。用新方法处理数据,计算的轨道根数半长轴外符合误差平均降低了605m,有效提高了测量船定轨精度。

Impact of Low-Elevation Atmospheric Refraction Error on Accuracy of Initial Orbit

This paper proposes an approach to solve the problem of poor correction accuracy of the experiential refractive correction model used by instrumentation ships in tracking at low elevations during space rendezvous and docking missions.A fitting algorithm based on the zenith delay is incorporated to increase the range correction accuracy of low-elevation tracking by ship-borne radars and to meet orbit determination accuracy requirements of data handling of instrumentation ships.The new method reduces the exterior coincidence error of semi-major axis by 605 meters.