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The simulation and error analysis of raindrop size distribution obtained by micro rain radar
The simulation and error analysis of raindrop size distribution obtained by micro rain radar
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摘要：
Observation of raindrop size distribution( DSD) with a vertically pointing micro rain radar( MRR) has important significance in the precipitation measurement field. The Mie scattering of large particle,vertical wind and air turbulence have great influences on the retrieval of DSD measured by MRR. This paper simulates the process of how three factors affect the inversion of DSD and the calculation of other precipitation parameters,then makes the errors analysis. Because the wavelength of MRR is 12.5mm,M ie theory is more suitable for the precipitation particle than Rayleigh approximation,w hich may cause the underestimation of number density of small droplets and the overestimation of that in middle field. The vertical wind results in inaccurate estimation of particle terminal velocity,so the diameter is measured with some errors by empirical relationship,w hich affects the calculating accuracy of radar reflectivity and rain rate. Air turbulence can broaden the pow er spectral density,of which the impact on the inversion of DSD are concentrated in small droplets field. Then the measured data from MRR is analyzed and the results prove the impacts of those factors. Finally,according to the analysis and application limits,the prospect of the future research trend of particle size distribution is conducted.
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| 篇名 | The simulation and error analysis of raindrop size distribution obtained by micro rain radar | ||
| 来源期刊 | 仪器仪表学报：英文版 | 学科 | 地球科学 |
| 关键词 | DSD M ie theory the vertical WIND air TURBULENCE error analysis | ||
| 年，卷（期） | 2015,（3） | 所属期刊栏目 | |
| 研究方向 | 页码范围 | 43-54 | |
| 页数 | 12页 | 分类号 | P412.25 |
| 字数 | 语种 | ||
| DOI | |||
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DSD
M
ie
theory
the
vertical
WIND
air
TURBULENCE
error
analysis
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仪器仪表学报：英文版
主办单位：
中国仪器仪表学会
科学普及出版社
出版周期：
季刊
ISSN：
2095-7521
CN：
10-1206/TH
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出版地：
北京市
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出版文献量（篇）
134
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0
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