Simultaneous observation of raindrop size distribution by VHF and L-band Doppler radars
Simultaneous observation of raindrop size distribution by VHF and L-band Doppler radars
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VHF和L波段多普勒雷达同时观测雨滴尺寸分布
DOI：
10.1109/aps.1994.408143
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
S. Fukao
中科院分区：
文献类型：
--
作者：
T. Sato;T. Teraoka;I. Kimura;H. Hashiguchi;S. Fukao
雨滴大小分布的垂直廓线的确定是了解降水演变过程的一项困难而又重要的任务。使用多普勒雷达是一种很有前途的方法。作者利用具有多普勒能力的VHF（中高层大气）雷达和l波段（边界层雷达）在1992年白雨季节在日本进行了一系列同时观测。他们开发了一种自动曲线拟合算法，该算法从观测到的多普勒光谱中导出DSD参数，并通过数值模拟研究了它们的准确性。他们严格检查伽马分布的适当性，该分布广泛用于分析雷达数据，根据衍生参数的误差。
The determination of the vertical profile of raindrop size distribution (DSD) is a difficult, but essential task in understanding the evolution process of precipitation. Use of multiple Doppler radars is one of the promising methods. The authors made a series of simultaneous observations using the VHF MU (middle and upper atmosphere) radar and an L-band BLR (boundary-layer radar), both of which have a Doppler capability, in Japan during the Bai-u season of 1992. They developed an automated curve-fitting algorithm which derives the DSD parameters from the observed Doppler spectra, and have investigated their accuracy via numerical simulations. They critically examine the appropriateness of the gamma distribution, which is widely used in analyzing the radar data, in terms of the errors of derived parameters.