用CHAMP卫星资料反演地球中性大气参数

The Arithmetic Discussion for Inversion of Earth′s Neutral Atmospheric Parameters with CHAMP Satellites Data

介绍了利用GPS掩星反演地球中性大气参数的原理。在实际解算中,总结出用迭代法解多普勒观测方程、数值积分法求大气折射指数、用最小二乘法模拟大气折射指数与高度的函数关系。对特定掩星事件的数据进行了反演计算,并对计算结果进行了分析。

The theory and the procedure of inversion of Earth＇s neutral atmospheric parameters with GPS occultation are briefly introduced. In practical solution, it can be summarized that the Doppler equations are resolved with the iterative method, the atmospheric refactive index can be evaluated with the method of numerical value integral, and the functional connection between atmospheric refactive index and height is simulated by the method of least squares. The computation with data of certain occultation event is done and the results are analyzed.