滤纸法地面雨滴谱的观测和资料处理

Observations and Data Processing of Ground Raindrop Spectrum with Filter Paper Method

利用滤纸法对地面雨滴谱进行观测和分析是地面雨滴谱观测的基本方法,对滤纸法地面雨滴谱观测的方法和资料的处理进行分析,通过增大取样面积、增加辅助观测手段等方法改进了传统的滤纸取样法,并对雨滴谱资料和雷达资料的处理上进行了分析,得出在雨滴谱的观测增大取样面积可获得高时间分辨的稳定雨滴谱,减小测量误差,雨滴在下落过程中的水平漂移对于雷达回波强度的选取影响不大,在雷达回波强度和地面降水强度数据的提取上采用空间和时间的平均,可以减小计算的偶然误差。

The filter paper method is the basic method to observe and analyze the ground raindrop spectrum.In this paper,the method and the data processing of the ground raindrop spectrum observation by filter paper are analyzed and the traditional filter paper sampling method is improved by increasing the sampling area and the auxiliary observation methods.After the data processing analysis of raindrop spectrum and radar,the stable raindrop spectrum of high time resolution can be obtained by increasing sampling area in the observations of raindrop spectrum.It can reduce the measurement error by the little effect of the raindrops' level drift in the fall to the selection of the radar echo intensity.The average of space and time can reduce the accidental calculation error in the data extraction of radar echo intensity and ground rainfall intensity.