摘要: |
文章针对S波段双偏振天气雷达设计了一种改良的标准差分析方法,用以评估雷达数据质量,通过评估2022年2月-10月成都雷达基数据的数据质量,得到了如下结果:(1)对于正常雷达数据,改良的标准差计算方法与原始方法能得到相同趋势的标准差分布结果,计算异常雷达数据的标准差时,能得到更优的标准差分布结果。(2)成都雷达Zh数据质量存在较大波动,标准差低于SDZh标准值的比例仅43.67%。(3)成都雷达Zdr和CC数据质量较好,标准差低于SDZdr和SDCC标准值的比例分别为84.09%和87.10%,φdp的数据波动较大,标准差低于SDφdp上限的比例仅34.54%。 |
关键词: 双偏振雷达;数据质量;标准差 |
DOI: |
投稿时间:2022-12-03修订日期:2023-07-18 |
基金项目: |
|
Evaluation on Data Quality of S-band Dual Polarization Radar Based on Standard Deviation Analysis |
XIE Xiaolin,HU Di,ZHENG Wei,PENG Tao,JING Haoran |
(Meteorological Observation Data Center of Sichuan Province;Meteorological Observatory of Sichuan Province) |
Abstract: |
Aiming at s-band dual polarization weather radar, a improved standard deviation analysis method is designed to evaluation radar data quality. By evaluating the data quality of Chengdu radar base data from February to October 2022, the following results are obtained. Firstly, when calculating the normal radar data, two methods can get the same trend of standard deviation distribution results, and when calculating the error radar data, the results of improved method is better. Secondly,the Zh of Chengdu radar data has great fluctuation, and the proportion of standard deviation lower than the standard value of SDZh is only 43.67%. Lastly, the data quality of Zdr and CC in Chengdu radar is superior. The proportion of standard deviation lower than SDZdr and SDCC standard value is 84.09% and 87.10%. the φdp of Chengdu radar data has great fluctuation, and the proportion of standard deviation lower than the standard value of SDφdp is only 34.54%. |
Key words: dual polarization radar, data quality, standard deviation |