A Robust Attenuation Correction System for Reflectivity and Differential Reflectivity in Weather Radars
A Robust Attenuation Correction System for Reflectivity and Differential Reflectivity in Weather Radars
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DOI：
10.1109/tgrs.2015.2487984
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发表时间：
2016-03
影响因子：
8.2
通讯作者：
Sanghun Lim;V. Chandrasekar
中科院分区：
文献类型：
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作者：
Sanghun Lim;V. Chandrasekar
对于任何使用反射率和/或微分反射率的定量应用，雷达观测需要针对降水造成的衰减效应进行补偿。本文提出了一种用于双偏振雷达的鲁棒衰减校正系统（ACS），可校正反射率因子以及差分反射率分布。本文描述的算法的主要优点是程序不受反射率和微分反射率的偏差影响。此外，该方法对温度的变化不是很敏感。所提出的 ACS 已通过 X 波段雷达观测进行了评估，该观测是根据 CSU-CHILL 雷达观测到的高分辨率 S 波段测量得出的液滴尺寸分布进行模拟的。对所提出的反演算法的评估表明，反演的反射率和差分反射率比具有差分相位约束的传统自洽衰减校正技术有所改进。
For any quantitative applications that use reflectivity and/or differential reflectivity, radar observations need to be compensated for attenuation effects due to precipitation. This paper presents a robust attenuation correction system (ACS) for dual-polarization radars correcting the reflectivity factor as well as differential reflectivity profiles. The major advantage of the algorithm described in this paper is that the procedures are immune to the bias effect of reflectivity and differential reflectivity. In addition, this method is not very sensitive to the variation of temperature. The proposed ACS has been evaluated with X-band radar observations simulated from drop size distribution derived from high-resolution S-band measurements observed by the CSU-CHILL radar. The evaluation of the proposed retrieval algorithm shows that the retrieved reflectivity and differential reflectivity provide an improvement over the conventional self-consistent attenuation correction technique with the differential phase constraint.