双偏振天气雷达雨区衰减测量偏差的修正

Deviation Correction for Rain-area Attenuation Measurement Using Dual Polarization Weather Radars

针对现有的测量雨区衰减方法受到标定局限性的限制,导致测量值存在偏差的问题,提出基于标定源的双偏振天气雷达雨区衰减测量偏差修正方法;安装双偏振天气雷达设备,并测量雨区衰减数据,以测量衰减数据为偏差修正的初始数据,分析测量偏差来源与类型;利用标定源对双偏振天气雷达设备进行标定,实现雨区衰减测量偏差修正。修正效果测试对比实验结果表明,与传统的偏差修正方法相比,该修正方法在大部分区间内的回波统计值更大,修正效果更加明显。

Aiming at the problem that existing measurement methods for rain-area attenuation were limited by calibration limitations,which led to deviation of measurement values,a correction method for rain-area attenuation measurement using dual polarization weather radars based on a calibration source was proposed.The dual polarization weather radar equipment was installed,and attenuation data of rain area were measured.Taking the measurement attenuation data as initial data of deviation correction,sources and types of measurement deviation were analyzed.The calibration source was used to calibrate the dual polarization weather radar equipment,and deviation correction of the rain-area attenuation measurement was realized.The correction effect test and comparison experimental results show that compared with the traditional deviation correction methods,the proposed correction method has greater statistical values of echo in most of the intervals and more obvious correction effect.