GLONASS历书解算与卫星可见性预测

A Prediction Method of GLONASS Satellites Orbits and Visibilities Based on the Almanac

介绍了GLONASS历书解算方法,并基于GLONASS接收机研制项目,提出一种预测GLONASS卫星可见性的方法。根据GLONASS卫星某一已知状态历书信息和卫星运行规律,计算卫星位置、速度及高度角,根据高度角大小判断卫星对地面用户的可见性。利用GLONASS信号源对算法进行测试。经验证,该方法不仅计算简便,准确度高,还能满足工程实践中快速捕获卫星的需求。

An almanac calculation algorithm of GLONASS is introduced, and a GLONASS satellites visibilities prediction method is presented. On the basis of satellite dynamics, the almanac information is used in this method to predict the satellites positions, velocities and elevation from a known state. And it calcu-lates the satellites visibilities according to the elevation. Due to the test of the presented algorithm based on a GLONASS simulator, the result shows that the algorithm provides accurate satellites positions, velocities and elevation prediction. Moreover, it also fulfills the requirements of fast-acquisition in engineering.