低层大气误差对距离变化率折射误差的影响

大气折射残差模型是综合处理雷达测量数据及光学测量数据时需要重点考虑的残差项。本文对现行的大气折射差模型提出了质疑，并从折射原理出发，在球面分层的情况下重新推导了大气折射指数的变化对视在距离变化率与真实距离变化率之差的影响。

The Influence on Range Rate Refraction Error by Lower Atmospheric Refraction Index Error

The atmospheric refraction residual error model is important for radar and optics data processing. In this paper, we analysis the traditional atmospheric residual error model and point out its mistakes. From the principle of refraction, we conclude the infuence on the difference between range rate and radio range rate (range rate refraction error) by atmospheric refraction index varying on the assumption of horizontal homogeneity. which is a very important term in the refraction residual error model. A new refraction error model is presented, proving that the refraction residual error in range rate is catlsed mainly by the radio wave bending in atomspheric and not by delaying. On some condition. we simplify this model and the new model has unmatched property and is convenient for integrated data processing.