对流层高精度电波折射修正快速算法

A Fast High Precision Algorithm of Radio Wave Troposphere Refraction Correction

为了提高雷达探测精度,针对现有电波折射误差修正方法中不能兼顾精度和计算速度的现状,提出一种对流层高精度电波折射误差修正快速算法。首先根据雷达所在地的实际情况给出获取较高精度大气折射率剖面方法,然后根据雷达测量到的目标近似位置通过几何方法得到目标的虚高,再以虚高判断出目标所处的大气层,最后采用大气分段模型通过调用高精度积分函数结合修正公式进行折射误差修正。实验结果证明,该算法与积分法、积分改正法、微分法等方法相比,在确保电波折射误差修正精度的前提下,其计算速度更快,速度分别提高77.95%、45.89%、33.04%。该算法具有精度高、速度快的优点,可直接应用于雷达电波折射误差修正工程。

In order to improve the radar detection accuracy,a fast algorithm of high-precision tropospheric refraction error correction was proposed for the current situation that the accuracy and calculation speed cannot be taken into account in the existing electric wave refraction error correction methods.Firstly,the method of obtaining a higher precision atmospheric refractive index profile was given according to the actual situation of the radar location,then the virtual height of the target was obtained by the geometric method according to the approximate position of the target measured by the radar,then the atmospheric layer in which the target was located and judged by the virtual height,and finally the atmospheric segmentation model is used to correct the refraction error by calling the high precision integral function combined with the correction formula.The experiment proved that the algorithm was faster than other methods in terms of calculation speed compared with the integral method,integral correction method and differential method,and the speed could be increased by 77.95%,45.89%,and 33.04%respectively,under the premise of ensuring the accuracy of radio wave refraction error correction.The algorithm had the advantages of high accuracy and high speed,and could be directly applied to radar radio wave refraction error correction engineering.