GPS广播星历参数拟合算法的探讨

Discussion on the fitting of GPS broadcast ephemeris parameters

介绍了全球定位系统(GPS)的广播星历参数拟合算法,在推导卫星位置对GPS广播星历参数偏导数的基础上,导出了调和项对偏导数的影响函数。计算结果表明,考虑调和项并不能提高GPS广播星历参数拟合的精度和效率,实际应用时应忽略调和项的影响。

After a review of the fitting of GPS broadcast ephemeris parameters, the influence function (IF) of the harmony term (HT) to the partial derivative is presented based on the partial derivative of satellite position with respect to ephemeris parameters. The results indicate that taking into account harmony terms cannot improve the precision and efficiency of GPS broadcast ephemeris parameter fitting, so the harmony term can be ignored in application.