基于Collocation积分的GPS轨道仿真

Simulation of the Collocation Integral for the GPS Track

在对GPS仿真的理论实施基础上,为方便求取卫星任意历元的位置、速度、加速度和加加速度,介绍了轨道仿真中涉及的摄动力模型,详细讨论了轨道仿真中初值的确定及轨道外推的方法,选用Collocation积分方法实现了轨道仿真,利用附加确定性参数的方法提高了模型精度,满足了1米精度的定轨要求。

In the paper ,based on the theoretical implementation of GPS simulation ,for the convenience of obtaining satellite position ,velocity ,acceleration and jerk of arbitrary ep-och ,the article presented the perturbation model involved in the simulation of the track ,dis-cussed the initial value and the method of track extrapolation in the orbit simulation .Finally , the paper selected the method of Collocation integral to achieve orbit simulation ,With the method of additional deterministic parameter ,improves the accuracy of the model to meet the requirements of 1m orbit determination accuracy .