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
Quality control algorithm of S-band weather radar in Liaoning province based on three heavy precipitation processes
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
作者信息
- 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
- 折叠
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.
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,dif-ferential reflectivity variance and differential propagation phase shift variance corresponding to feature clutter in Li-aoning area were statistically characterized,the localization parameters corresponding to the fuzzy logic clutter rec-ognition 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 monito-ring of the S-band dual-polarization radar quality control technique in the strong convective weather.
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Key words
Radar data quality control/Dual polarization weather radar/Fuzzy logic algorithm/Ground clutter rec-ognition引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据