Estimation of vertical profiles of raindrop size distribution from the VHF wind pro filer radar Doppler spectra
Estimation of vertical profiles of raindrop size distribution from the VHF wind pro filer radar Doppler spectra
复制标题
根据 VHF 风廓线雷达多普勒频谱估计雨滴尺寸分布的垂直剖面
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
D. Rao
中科院分区：
文献类型：
--
作者：
Y. Ohno;A. Jain;D. Rao
本文介绍了一种新的形式的伽玛液滴尺寸分布（DSD）模型的研究，采用两个任意的时刻作为自由DSD参数，以提高在研究伽玛DSD模型的特性，以适应频谱的灵活性。从求解非线性最小二乘（NLLS）问题的稳定性和DSD矩估计的精度两个方面来评价DSD模型的有效性。微物理（即，在层状降水云系经过期间（10月23日! 997)在Gadanki的53兆赫甚高频风廓线雷达的上空。检索到的雨积分参数进行了比较，相应的disdrometer数据和测量之间的一个相当好的协议已被发现，贷款credence的VHF风廓线雷达检索DSD参数。将层状降水期间风廓线雷达估计的DSD与对数正态印度气候模式进行了比较。据观察，模式的DSD同意密切与两个模型。
This paper describes research on a new form of gamma drop size distribution (DSD) model that employs two arbitrary moments as free DSD parameters to enhance the flexibility in studying the characteristics of gamma DSD model to fit the spectrum. The validity of a DSD model is evaluated in terms of the stability in solving non-linear least-squares (NLLS) problem and the accuracy in DSD moment estimates. The microphysical [i.e., raindrop size distributions (DSD)] parameters are retrieved during stratiform precipitating cloud system passed (on 23 Oct.! 997) overhead of 53-MHz VHF wind pro filer radar at Gadanki. The retrieved rain integral parameters were compared to the corresponding disdrometer data and a reasonably good agreement between the measurements has been found, lending credence to the VHF wind profiler radar retrievals of DSD parameters. Wind profi ler radar estimated DSD during stratiform precipitation has been compared with the lognormal Indian climate model. It is observed that the pattern of DSD agrees closely with both models.