| X波段双线偏振气象雷达反射率的衰减订正 |
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| 引用本文： | 毕永恒,刘锦丽,段树,吕达仁,苏德斌,陈羿辰.X波段双线偏振气象雷达反射率的衰减订正[J].大气科学,2012,36(3):495-506. |
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| 作者姓名： | 毕永恒 刘锦丽 段树 吕达仁 苏德斌 陈羿辰 |
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| 作者单位： | 1.中国科学院大气物理研究所, 北京 100029 |
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| 基金项目： | 国家自然科学基金资助项目 40930949、40227001, 中国科学院知识创新工程重要方向项目KZCX2-YW-206 |
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| 摘 要： | X波段天气雷达的强衰减是影响其探测精度与应用推广的主要问题.本文旨在寻求适用于降水过程中对X波段双偏振雷达进行衰减订正的一种方法.在订正前先对雷达数据进行了质量控制和预处理；在分析了国内外已有订正方法的基础上,选择并改进了自适应约束算法作为雷达反射率进行衰减订正的方法；最后进行方法的效果验证.既对衰减订正前后反射率与同...
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| 关 键 词： | X波段双线偏振雷达 衰减订正 自适应约束算法 |
| 收稿时间： | 2011/4/15 0:00:00 |
| 修稿时间： | 2011/11/18 0:00:00 |
Attenuation Correction of Reflectivity for X-Band Dual-Polarization Radar |
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| BI Yongheng,LIU Jinli,DUAN Shu,LV Daren,SU Debin and CHEN Yichen.Attenuation Correction of Reflectivity for X-Band Dual-Polarization Radar[J].Chinese Journal of Atmospheric Sciences,2012,36(3):495-506. |
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| Authors: | BI Yongheng LIU Jinli DUAN Shu LV Daren SU Debin and CHEN Yichen |
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| Institution: | 1.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 1000292.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Beijing Meteorological Bureaus, Beijing 1000893.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Beijing Meteorological Bureaus, Beijing 100089; Chengdu University of Information Technology, Chengdu 610225 |
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| Abstract: | Strong attenuation in rain affects the detection accuracy and application of the X-band radar. This paper aims to seek a method of attenuation correction for X-band dual-polarization radar in precipitation. Before correction, the radar data are pre-processed with quality control; after analyzing all the methods from the past works, an attenuation correction algorithm is developed which is based on the self-consistent method with constraints; finally some validation methods are studied. Some comparisons are made between the corrected composite reflectivity of the X-band radar and a nearby S-band radar observed at the same time; moreover, the corrected relationships between KDP vs. ZH and AH vs. ZH are also similar to the theoretical values predicted by scattering simulation. In addition, the authors also compare the corrected reflectivity with the surface rain-gauge observations. The analysis results indicate that the corrected reflectivity is more significant than the uncorrected one; specially for the larger area of rainfall (including convective rainfall) using the above attenuation correction algorithm for X-band radar, rainfall amounts can be estimated with higher accuracy. |
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| Keywords: | X-band dual-polarization radar rain attenuation correction self-consistent method |
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