0度及其附近仰角的电波折射误差修正方法

Method of radio wave refraction error correction based on 0 deg and its nearby elevation angles

为提高雷达测量精度,对大气介质引起的电波折射误差必须进行修正。针对目前高精度雷达越来越多用于低空或超低空探测,使得雷达仰角一般处于0度左右情况,提出了实用于0度及其附近仰角的电波折射修正方法。该方法利用大气折射指数梯度,采用分部积分法解决了常规电波折射修正方法中因公式中分母为0而无法计算,或迭代次数过多而严重影响计算速度等不足,使得其能够实用于工程实际应用。通过与常规方法修正结果比较,证明了该方法的实效性。

In order to improve the surveying accuracy, the radio wave refraction error caused by atmosphere medium has to make correction. Aiming at the existing high accuracy radar has been increasingly used for low altitude or super low altitude exploration that the elevation angle of a radar is in about 0 deg, a corrective meth- od of radio wave refraction errors is proposed, which is practical in 0 deg and its nearby elevation angles. This method uses the atmospheric refractivity grads and adopts an integration by parts to solve the problems of nor- mal radio wave refraction error correction, such as the denominator of the correlation formula is zero, so as to be unable to calculate or it may influence the computation speed seriously when the iteration times are too many and so on. So it can be applied in the engineering. The effectiveness of the proposed method is proved through a comparison with the corrective result of normal methods.