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

doi:10.3969/j.issn.1673-503X.2024.05.002

Abstract

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

CLC Number:

P413.2

Chang HOU,Liang WU,Chuanhai MIAO,Boshi KANG,Weiwei SHAN,Wen YAO,Zonghao LI,Lei YANG. Quality control algorithm of S-band weather radar in Liaoning province based on three heavy precipitation processes[J]. Journal of Meteorology and Environment, 2024, 40(5): 12-19.

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回波类型	数据日期	数据时间
地物杂波	2021年08月09日	11—12时
	2021年11月06日	08—09时
	2022年07月10日	04—05时
	2022年06月10日	05—06时
	2022年08月10日	04—05时
	2022年09月10日	04—05时
降水回波	2021年06月26日	11—12时
	2021年06月27日	05—06时
	2021年07月14日	04—04时
	2021年08月20日	07—08时
	2022年06月25日	14—15时
	2022年07月29日	03—04时

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

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