一种静态单点定位的事后精密星历组合滤波方法

A method of post-precise ephemeris with combined filtering for static point positioning

为了提高卫星导航的精密单点定位的精度,对比分析开源软件RTKLIB在不同星历产品、不同滤波方式、不同观测时间条件下的静态单点定位精度优劣,提出事后精密星历结合组合滤波方法,并给出RTKLIB静态精密单点定位的更优解算策略。实验结果表明:采用事后精密星历结合组合滤波方法解算4h左右的数据可以取得厘米级精度,单天解算精度可达毫米级。

In order to improve the accuracy of precise point positioning for satellite navigation,the paper comparatively analyzed the precision of single point positioning with RTKLIB software under the conditions of different ephemeris products,different filtering methods and different observation time,presented a method of post-precise ephemeris with combined filtering,and gave an optimal solution for the RTKLIB static precise point positioning.Experimental result showed that the method could be used to calculate 4 hdata with the accuracy of centimeter level,and a day data with the accuracy of millimeter level.