精密定轨用地球大气模型误差的补偿方法

A METHOD OF COMPENSATION TO THE MISMODELING OF TERRESTRIAL ATMOSPHERIC DENSITY FOR PRECISION ORBIT DETERMINATION

本文提出了一种用于精密轨道确定的地球大气模型误差的补偿方法，这种方法采用改进 大气周日峰角的技术，有效地补偿了大气密度模型的误差，并具有较好的物理意义．与传统 的每圈改进一次加速度的方法比较，轨道确定达到了相当的径向精度，且避免了轨道改进参 数间的相关性，同时解算参数的数量也少了一半．

In this study an efficient and geophysically meaningful density correction technique has been developed to compensate the mismodeling of the atmospheric density due to the solar activity for the purpose of the precision orbit determination. This technique used a method which estimates parametrization of the atmospheric bulge angle due to the diurnal heating of the atmosphere. The result given by this technique achieves a similar radial accuracy compared to the conventional parametrization, which involves estimation of ones-per-revolution acceleration parameters. The significant advantages of this method are: the bugle angle is uncorrelated with other orbital parameters, and only one-half of the parameters entering the solution can achieve the same effect of using ones-per-revolution acceleration parameters.