Computer processing for deriving drop-size distributions and vertical air velocities from VHF Doppler radar spectra
Computer processing for deriving drop-size distributions and vertical air velocities from VHF Doppler radar spectra
复制标题
用于从 VHF 多普勒雷达频谱得出液滴尺寸分布和垂直空气速度的计算机处理
DOI：
10.1029/rs025i005p00961
复制
发表时间：
1990
期刊：
影响因子：
1.6
通讯作者：
S. Kato
中科院分区：
文献类型：
--
作者：
Toru Sato;H. Doji;H. Iwai;I. Kimura;S. Fukao;M. Yamamoto;T. Tsuda;S. Kato
一个完全自动化的数据处理程序已经开发出来，用于从VHF多普勒雷达频谱中同时获得降水参数和背景大气参数，如平均风速。该程序大大提高了我们分析连续观测数据的能力，这是人类难以实现的分析。导出的参数的准确性定量评估通过数值模拟。据发现，雨参数可以确定的时间和高度分辨率分别为10分钟和600米，例如，高的信号-噪声比的精度为15%。背景大气湍流的参数估计的准确性是目前用于分析晴空数据的拟合程序的两倍以上。首次将中分辨率雷达的观测结果与地面实测雨强进行了比较。经证实，该雷达具有测量降雨参数的能力，降雨率灵敏度约为1 mm h-1。
A fully automated data processing procedure has been developed for deriving the precipitation parameters from VHF Doppler radar spectra simultaneously with the background atmospheric parameters such as the mean wind velocity. The procedure has largely enhanced our capability in analyzing the data from continuous observations, which was hardly possible with human-attained analysis. The accuracy of the derived parameters are quantitatively evaluated by means of numerical simulations. It is found that the rain parameters can be determined with an accuracy of 15% at a time and height resolution of 10 min and 600 m, respectively, for high signal-to-noise ratios, for example. Parameters for the background atmospheric turbulence are estimated with an accuracy more than twice the fitting procedure currently used to analyze clear-air data. Experimental results of the MU radar observations are compared with the rain intensity measured on the ground for the first time. It is confirmed that the radar has a capability of measuring rain parameters with a rainfall rate sensitivity of about 1 mm h−1.