一种基于椭球分层模型的电波折射修正算法

Radio Wave Refraction Correction Algorithm Based on Ellipsoid Stratification Atmospheric Structure Model

传统电波折射修正算法普遍采用大气球面分层假设,这类算法在修正高仰角测量目标时具有较好的修正精度,然而对于低仰角、远距离目标,修正精度还不高。该文提出一种折射修正算法,采用更精确的椭球面分层模型描述大气分布,利用迭代递推的方法计算修正后的目标位置,相比传统折射修正算法,计算量有所增加,但是提高了低仰角、远距离目标测量数据折射修正精度,可用于事后数据处理。

Traditional radio wave refraction correction algorithms commonly use spherical stratification atmospheric structure model, such kind of model has better results for the measurement data of high elevation angle target. However, it is not good enough for the long-range and low elevation one. This paper proposes a refraction correction algorithm using an ellipsoid stratification model to describe the atmospheric structure. Furthermore, the corrected results are computed by iteration and recursion method. Compared with the traditional refraction correction algorithms, the computational cost of the new model increases, but its low elevation and long-range target refraction correction accuracy is improved, and it can be used in post-flight data processing.