| An Improved Velocity Volume Processing Method |
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| 作者姓名： | 李南 魏鸣 唐晓文 潘玉洁 |
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| 作者单位： | Key Laboratory of Mesoscale Severe Weather of Ministry of Education Nanjing University Nanjing 210093 Global Change Research Center，Nanjing University，Nanjing 210093，Jiangsu Key Laboratory of Meteorological Disaster Sino-American Cooperative Remote Sensing Center，Nanjing University of Information Science and Technology，Nanjing 210044，Key Laboratory of Mesoscale Severe Weather of Ministry of Education Nanjing University，Nanjing 210093，Key Laboratory of Mesoscale Severe Weather of Ministry of Education Nanjing University，Nanjing 210093 |
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| 基金项目： | 国家自然科学基金，Jiangsu Key Laboratory of Meteorological Disaster，Nanjing University of Information Science and Technology Research Foundation |
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| 摘 要： | Velocity volume processing （VVP） retrieval of single Doppler radar is an effective method which can be used to obtain many wind parameters. However, due to the problem of an ill-conditioned matrix arising from the coefficients of equations not being easily resolved, the VVP method has not been applied adequately and effectively in operation. In this paper, an improved scheme, SVVP （step velocity volume processing）, based on the original method, is proposed. The improved algorithm retrieves each group of components of the wind field through a stepwise procedure, which overcomes the problem of an ill-conditioned matrix, which currently limits the application of the VVP method. Variables in a six-parameter model can be retrieved even if the analysis volume is very small. In addition, the source and order of errors which exist in the traditional method are analyzed. The improved method is applied to real cases, which show that it is robust and has the capability to obtain the wind field structure of the local convective system. It is very helpful for studying severe storms.
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| 关 键 词： | 气象雷达 多普勒雷达 雷达数据处理 高速批处理方法 病态矩阵 风参数 |
| 收稿时间： | 20 March 2006 |
| 修稿时间： | 2006-03-20 |
An improved velocity volume processing method |
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| Li?Nan,Wei?Ming,Tang?Xiaowen,Pan?Yujie.An Improved Velocity Volume Processing Method[J].Advances in Atmospheric Sciences,2007,24(5):893-906. |
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| Authors: | Li Nan Wei Ming Tang Xiaowen Pan Yujie |
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| Institution: | Key Laboratory of Mesoscale Severe Weather of Ministry of Education, Nanjing University, Nanjing 210093,Jiangsu Key Laboratory of Meteorological Disaster, Sino-American Cooperative Remote Sensing Center,
Nanjing University of Information Science and Technology, Nanjing 210044,Key Laboratory of Mesoscale Severe Weather of Ministry of Education, Nanjing University, Nanjing 210093,Key Laboratory of Mesoscale Severe Weather of Ministry of Education, Nanjing University, Nanjing 210093 |
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| Abstract: | Velocity volume processing (VVP) retrieval of single Doppler radar is an effective method which can be used to obtain many wind parameters. However, due to the problem of an ill-conditioned matrix arising from the coefficients of equations not being easily resolved, the VVP method has not been applied adequately and effectively in operation. In this paper, an improved scheme, SVVP (step velocity volume processing), based on the original method, is proposed. The improved algorithm retrieves each group of components of the wind field through a stepwise procedure, which overcomes the problem of an ill-conditioned matrix, which currently limits the application of the VVP method. Variables in a six-parameter model can be retrieved even if the analysis volume is very small. In addition, the source and order of errors which exist in the traditional method are analyzed. The improved method is applied to real cases, which show that it is robust and has the capability to obtain the wind field structure of the local convective system. It is very helpful for studying severe storms. |
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| Keywords: | velocity volume processing (VVP) ill-conditioned matrix stepwise retrieval residual radial velocity |
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