| 天顶扫描模式在双偏振天气雷达Z_(dr)系统偏差订正中的应用 |
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| 引用本文： | 胡汉峰,楚志刚,魏鸣.天顶扫描模式在双偏振天气雷达Z_(dr)系统偏差订正中的应用[J].气象科学,2019,39(5):599-607. |
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| 作者姓名： | 胡汉峰 楚志刚 魏鸣 |
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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/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局 气溶胶与云降水重点开放实验室, 南京 210044;中国气象局 气象探测中心天气雷达技术创新团队, 北京 100081,南京信息工程大学 气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局 气溶胶与云降水重点开放实验室, 南京 210044,南京信息工程大学 气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局 气溶胶与云降水重点开放实验室, 南京 210044 |
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| 基金项目： | 国家自然科学基金资助项目（41675029）；国家重点基础研究发展计划（973计划）项目（2013CB430100） |
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| 摘 要： | 双偏振天气雷达Z_(dr)系统偏差是影响雷达数据质量的关键因素,本文利用南京信息工程大学C波段双偏振天气雷达,对90°仰角天顶扫描数据在Z_(dr)系统偏差订正中的应用进行了分析,同时增加90°仰角定点观测模式,讨论并确认了方位旋转关节对Z_(dr)测量结果的影响,在双偏振天气雷达雷达Z_(dr)系统偏差订正中加入了方位旋转关节因素。研究结果表明:选择合适的90°仰角数据,不仅可以对接收双通道不一致造成的Z_(dr)固定系统偏差进行订正,还能够进一步检测由方位旋转关节衰减不同引起的误差;利用90°仰角数据对Z_(dr)的系统偏差进行订正,稳定性和精度较高,满足双偏振天气雷达Z_(dr)精度要求。
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| 关 键 词： | 天顶扫描 双偏振雷达 Zdr偏差 订正 |
| 收稿时间： | 2017/12/21 0:00:00 |
| 修稿时间： | 2018/12/25 0:00:00 |
Application of vertical scanning mode in the correction of Zdr system bias of dual polarization weather radar |
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| HU Hanfeng,CHU Zhigang and WEI Ming.Application of vertical scanning mode in the correction of Zdr system bias of dual polarization weather radar[J].Scientia Meteorologica Sinica,2019,39(5):599-607. |
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| Authors: | HU Hanfeng CHU Zhigang and WEI Ming |
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| Institution: | Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China;Weather Radar Technical Innovation Team of Meteorological Observation Centre of China Meteorological Administration, Beijing 100081, China,Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China and Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | Zdr system offset of dual polarization weather radar is the key factor affecting the quality of radar data. In this paper, the data of 90°elevation collected by the radar of Nanjing University of Information Science and Technology is used to analyzed the application of vertical scanning in the correction of Zdr system offset. And this paper increases the 90°elevation fixed observation mode, discusses and confirms the influence of azimuth rotation joint on the Zdr measurement, and adds the azimuth rotation joint factor to the correction of the dual polarization weather radar Zdr system offset. The results show that choosing the appropriate 90° elevation data, can not only correct the fixed Zdr system offset caused by the inconsistent between the dual receive channels, also possibly detect the errors caused by the inconsistency of the azimuth rotation joints. Using the 90° elevation data, the system bias of Zdr is corrected stably and accurately, which can meet the accuracy requirements of Zdr for dual polarization weather radar. |
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| Keywords: | vertical scanning dual polarization radar Zdr Bias correction |
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