基于STK的不同类型卫星测量弧段定轨结果仿真分析

Simulation Analysis of Orbit Confirmation Results for Telemetry Arc Segment of Different Satellites Based on STK

在不同类型轨道的定轨任务中,相同时间长度的测量弧段,与精密轨道根数相比,有的定轨结果与之非常接近,而有的相差甚远,甚至难以定出初轨。针对上述情况,根据不同类型卫星轨道特征,利用卫星仿真工具包(STK)工具进行仿真与分析,得出轨道的自身形状和大小对测量弧段内的定轨影响很大,因此在选择测量点时应尽量靠近轨道近地点。

In different orbit confirmation missions, even for the telemetry arc segments with same time length, the confirmation results are different comparing with the precision prime parameters. Some are close, others are entirely different and some of the orbit even can not be confirmed. At this state, based on the orbit characters of different types of satellites, the STK （Satellite Tool Kit） is used to simulate and analyse. The result is gained that the shape and size of orbit have great effect to the orbit confirmation for telemetry arc segment, so the point anear to the perigee should be chosen as the telemetry point for satellite.