| SWAN系统中雷达反射率因子质量控制算法及其应用 |
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| 引用本文： | 吴涛,万玉发,沃伟锋,冷亮.SWAN系统中雷达反射率因子质量控制算法及其应用[J].气象科技,2013,41(5):809-817. |
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| 作者姓名： | 吴涛 万玉发 沃伟锋 冷亮 |
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| 作者单位： | 武汉中心气象台,武汉 430074;武汉暴雨研究所,武汉430074;国家气象中心，北京 100081;武汉暴雨研究所,武汉430074 |
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| 基金项目： | 中国气象局业务项目“灾害天气短时临近预报系统(SWAN)”、公益性行业（气象）科研专项(GYHY201006002)、中国气象局气象关键技术集成与应用项目(CAMGJ2012M32)、国家自然科学基金项目(41205086)资助 |
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| 摘 要： | 介绍了SWAN系统中雷达反射率因子质量控制算法原理,包括数据预处理、孤立噪声回波过滤、超折射回波抑制3部分.数据预处理将原始雷达资料转换为统一的RD20格式,并检测数据质量.孤立噪声回波过滤包括双向搜索、回波特征量过滤法.超折射（Anomalous Propagation,AP）回波抑制采用模糊逻辑原理.介绍算法配置参数,通过对比分析武汉、随州、西安雷达AP识别因子概率分布图可知,三者是类似的,表明默认参数的适用性.评估表明,该方法可过滤掉大部分AP回波,缺点是未能识别部分远距离AP回波以及错误识别部分降水回波.
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| 关 键 词： | SWAN系统 雷达反射率因子 质量控制 |
| 收稿时间： | 2012/7/16 0:00:00 |
| 修稿时间： | 2012/11/6 0:00:00 |
Design and Application of Radar Reflectivity Quality Control Algorithm in SWAN |
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| Wu Tao,Wan Yuf,Wo Weifeng and Leng Liang.Design and Application of Radar Reflectivity Quality Control Algorithm in SWAN[J].Meteorological Science and Technology,2013,41(5):809-817. |
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| Authors: | Wu Tao Wan Yuf Wo Weifeng and Leng Liang |
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| Institution: | Wu Tao Wan Yufa Wo Weifeng Leng Liang (1 Wuhan Central Meteorological Observatory, Wuhan 430074; 2 Institute of Heavy Rain, Wuhan 430074 3 National Meteorological Center, Beijing 100081) |
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| Abstract: | The reflectivity quality control algorithm in SWAN is described, including data preprocessing,isolating noise echo filtering, and AP echo suppression. Data preprocessing converts raw radar data to RD20 format and checks data quality. Isolating noise echo filtering includes bi directional searching and echo feature filtering. AP echo suppression uses the fuzzy logic method.The parameters of the algorithm are described. As the probability distributions of AP features from Wuhan, Suizhou, Xian radar are similar, it is concluded that the default parameters can be applied in more than one radar site.The evaluation of the algorithm shows that the most AP echoes can be suppressed; meanwhile some AP far away from radar cannot be suppressed; and some rainfall echoes are wrongly identified as AP. |
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| Keywords: | SWAN system radar reflectivity quality control |
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