导航卫星自主定轨的算法研究及模拟结果

Algorithm and Simulation of Autonomous Orbit Determination for Navigation Satellites

讨论了利用卫星 卫星间的距离观测值建立导航卫星系统自主定轨的数学方法 ,并用GPS星座模拟星间观测值 ,采用滤波算法计算卫星的状态参数。模拟结果表明 ,在空间测距精度一定的情况下 ,自主定轨精度能高于GPS广播星历 。

With the launch and operation of China navigation satellites, it is urgently essential to automatically determine the satellite orbit under restricted conditions. We have established a mathematical model for autonomous orbit determination using satellite-to-satellite distance observations, in which the attitude parameters are derived based on quasi-distances between GPS satellites and a filtering algorithm. The result indicates that the accuracy of automatically determining orbits is better than that from GPS broadcasting ephemerides.