原子钟辅助GPS定位的研究

铷钟可以用来预测接收机的时钟偏差，通过对时钟偏差估计的改善就可以提高定位的精度，特别是可以改善垂直精度。由于铷钟的漂移非常缓慢，基于自适应低通滤波器，设计了一种导航算法用于铷钟约束的GPS。通过一个例子对所提出的算法进行的验证。

Study of atom clock aiding GPS positioning

Since the Rubidium clock makes it possible to predict the receiver clock offset,positioning accuracy could be enhanced through an improvement in clock offset estimation,and Rubidium clock aiding will definitely improve the vertical accuracy.Since the Rubidium clock drifts very slowly,an alternative navigation algorithm was designed for Rubidium clock constrained GPS using the adaptive low-pass filter.The implementation aspects of the method is also discussed along with a numerical example to validate the proposed method.