| 一种抗噪声的天气雷达速度退模糊新算法 |
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| 引用本文： | 楚志刚,银燕,顾松山.一种抗噪声的天气雷达速度退模糊新算法[J].气象学报,2013,71(4):743-753. |
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| 作者姓名： | 楚志刚 银燕 顾松山 |
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| 作者单位： | 南京信息工程大学,气象灾害教育部重点实验室;南京信息工程大学,中国气象局气溶胶与云降水重点开放实验室 |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY201106044);国家自然科学基金项目(40975037);江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 径向速度模糊是影响多普勒天气雷达资料质量的一个重要因素。针对模糊的问题,提出了一种抗噪声的速度退模糊新算法:基于速度场的空间连续性,采用无损的连续噪声抑制方案,由噪声分离、曲线拟合退模糊和噪声恢复3个步骤组成。用CINRAD-SA雷达4站3a的全部模糊数据(>40000个体扫文件)进行验证,结果表明:(1)抗噪声的速度退模糊新算法明显优于WSR-88D退模糊算法,正确率比其高30%;(2)以体扫文件为单位的退模糊正确率为89.4%,其中,台风、强对流和弱对流的退模糊正确率达92.9%。
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| 关 键 词： | 天气雷达 径向速度 速度退模糊 噪声抑制 质量控制 |
| 收稿时间： | 2012/11/29 0:00:00 |
| 修稿时间： | 4/7/2013 12:00:00 AM |
A new anti-noise dealiasing algorithm for weather radar velocities |
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| CHU Zhigang,YIN Yan and GU Songshan.A new anti-noise dealiasing algorithm for weather radar velocities[J].Acta Meteorologica Sinica,2013,71(4):743-753. |
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| Authors: | CHU Zhigang YIN Yan and GU Songshan |
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| Institution: | CHU Zhigang;YIN Yan;GU Songshan;Key Laboratory of Meteorological Disaster of Ministry of Education,Nanjing University of Information Science &Technology;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University ofInformation Science & Technology; |
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| Abstract: | Velocity aliasing is an important factor affecting the data quality of Doppler weather radar.A new anti-noise dcaliasing algorithm(AND) was proposed to solve the ambiguity.Based on the spatial continuity, the AND utilizes a lossless continuous noise suppression scheme.It consists of three steps: noise separation,fitting-curve dcaliasing, and noise restoration.Validation by 4 CINRAD-SA stations ×3 years of full ambiguous volume files (>40000) shows that:(1)AND was better than the WSR-88D dcaliasing algorithm.It had a correct rate 30% higher than that by the WSR-88D dcaliasing algorithm;(2) the correct rate of full ambiguous volume files were 89.4%,with the correct rate for typhoon,strong convection and weak convcction reached 92.9%. |
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| Keywords: | Weather radar Radial velocity Velocity dcaliasing Noise suppression Quality control |
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