“五九”型探空仪对折射修正精度的限制

The limitation of type 59 radiosonde on accuracy of refraction correction

要对空中目标进行精确测速定位 ,必须进行电波折射误差修正。基于常用“五九”型探空仪的精度 ,分析了用该仪器测量大气结构的测量误差 ,以及它对电波折射修正精度的限制。结果表明 ,用“五九”型探空仪测量大气结构时 ,大气测量误差随海拔高度的增高而降低 ;电波折射修正精度随仰角的增加而增高 ,在 1°以上仰角 ,引起电波折射修正的残差小于修正量的 1 .1 %。

Based on the accuracy of type 59 radiosonde in common use, this paper analyzes its measuring error and its limitation on accuracy of radiowave refraction correction when it measures atmospheric structure. The result shows that the error of atmospheric measurement reduces with increasing altitude and the accuracy of refraction correction increases with increasing elevation angle.The residual error for radiowave refraction correction induced by radiosonde is lower than 1.1% when the elevation angle is above 1°.