主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2024, Vol. 40 ›› Issue (5): 12-19.doi: 10.3969/j.issn.1673-503X.2024.05.002

• 论文 • 上一篇    下一篇

基于3次强降水过程的辽宁地区S波段天气雷达质控算法初探

侯畅1(),邬亮2,苗传海1,康博识1,单薇薇1,姚文3,李宗昊1,*(),杨磊4   

  1. 1. 辽宁省气象装备保障中心, 辽宁沈阳 110166
    2. 中国人民解放军96853部队, 辽宁沈阳 110084
    3. 营口市气象局, 辽宁营口 115001
    4. 辽宁省气象灾害监测预警中心, 辽宁沈阳 110166
  • 收稿日期:2023-02-27 出版日期:2024-10-28 发布日期:2024-12-17
  • 通讯作者: 李宗昊 E-mail:2609760417@qq.com;lzh7771@163.com
  • 作者简介:侯畅, 女, 1995年生, 工程师, 主要从事天气雷达算法和资料研究, E-mail: 2609760417@qq.com
  • 基金资助:
    辽宁省气象局年度基金项目(202214);中国气象局创新发展专项(CXFZ2022J059)

Quality control algorithm of S-band weather radar in Liaoning province based on three heavy precipitation processes

Chang HOU1(),Liang WU2,Chuanhai MIAO1,Boshi KANG1,Weiwei SHAN1,Wen YAO3,Zonghao LI1,*(),Lei YANG4   

  1. 1. Liaoning Meteorological Equipment Support Center, Shenyang 110166, China
    2. Unit 96853 of People's Liberation Army of China, Shenyang 110084, China
    3. Yingkou Meteorological Service, Yingkou 115001, China
    4. Liaoning Warning Center of Meteorological Disaster Monitoring, Shenyang 110166, China
  • Received:2023-02-27 Online:2024-10-28 Published:2024-12-17
  • Contact: Zonghao LI E-mail:2609760417@qq.com;lzh7771@163.com

摘要:

针对辽宁省S波段天气雷达常出现的数据质量问题, 提出了辽宁地区S波段天气雷达质控算法。算法包括起始方位角一致性订正、非标准遮挡订正、地物杂波识别、阈值控制和杂波剔除5个部分, 基于营口S波段双偏振雷达资料, 统计了辽宁地区地物杂波对应的反射率水平纹理、相关系数方差、差分反射率方差和差分传播相移方差的分布特征, 建立模糊逻辑算法识别地物杂波的本地化模糊基。利用辽宁地区3次强对流天气过程雷达资料(2021年8月19日、2019年6月9日和2022年6月25日)对质控算法进行验证。结果表明: 算法对气象回波的损失较小, 能够提高S波段雷达数据质量, 有效订正天气过程中的非标准遮挡, 消除地物杂波、电磁干扰等非气象回波, 可为S波段双偏振雷达质控技术在强对流天气中的监测提供参考。

关键词: 雷达数据质控, 双偏振天气雷达, 模糊逻辑算法, 地物杂波识别

Abstract:

In this paper, a quality control algorithm of S-band dual polarization weather radar is proposed in order to solve the data quality problem of S-band weather radar in Liaoning province. The algorithm included five parts: initial azimuth consistency revision, non-standard blockage revision, ground clutter recognition, threshold control and clutter elimination. Based on the S-band dual polarization weather radar data under different weather processes in Yingkou region, the distribution characteristics of reflectivity level texture, correlation coefficient variance, differential reflectivity variance and differential propagation phase shift variance corresponding to feature clutter in Liaoning area were statistically characterized, the localization parameters corresponding to the fuzzy logic clutter recognition algorithm are established. The quality control algorithm was verified by using the radar base data during three severe convective weather events (August 19, 2021;June 9, 2019;June 25, 2022) in Liaoning province. The results show that the algorithm has less loss of meteorological echoes. It can improve the quality of S-band radar data, effectively revise the non-standard obscuration during the weather process, eliminate the non-meteorological echoes such as ground clutter and electromagnetic interference. The study can provide a reference for the monitoring of the S-band dual-polarization radar quality control technique in the strong convective weather.

Key words: Radar data quality control, Dual polarization weather radar, Fuzzy logic algorithm, Ground clutter recognition

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