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移动X波段双线偏振雷达数据质量分析及偏差订正
张林1, 李峰1, 冯婉悦2, 刘新安3
(1.中国气象局气象探测中心;2.新疆维吾尔自治区气象技术装备保障中心;3.中国电科十四所南京恩瑞特实业有限公司)
The Research of Data Quality Analysis and Bias Correction onMobile X-band Dual-Polarization Weather Radar
Zhang Lin1, Li Feng1, Feng Wanyue2, Liu Xinan3
(1.Meteorological Observation Center of CMA;2.Observation Center of Uygur Autonomous Regional Meteorological Service,Urumqi;3.NanJing Nriet Industrial CO,LTD)
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投稿时间:2020-01-09    修订日期:2020-11-04
中文摘要: 2019年8月,中国电科十四所南京恩瑞特实业有限公司研制的GLC-12A型移动X波段双线偏振多普勒天气雷达在江苏大丰进行外场观测,本文利用该雷达外场观测资料联合盐城新一代SA天气雷达和江苏省6部雨量站资料,对移动X波段双线偏振雷达做数据质量分析。结果表明,在0-30km探测范围内,该雷达仅在回波强度高值区存在衰减,但30km之外则衰减严重。为了降低衰减造成的观测误差,本文首先利用信噪比对差分反射率Zdr、零滞后相关系数ρhv(0)进行偏差订正,提高Zdr和ρhv(0)的数据质量,以便进行地杂波、生物回波等非降水回波过滤。然后应用去抖动滤波后的差分相移率Kdp或总差分传播相位φdp表达在雨中距离雷达R(km)处的总双向反射率因子衰减订正值。数据分析表明,订正后移动X波段双线偏振雷达数据质量得到了提高。
Abstract:In August 2019, the GLC-12A-type mobile X-band dual-polarization weather radar, which developed by Fourteen Research Institute of China Electronics Technology Group, was conducted field tests in Dafeng, Jiangsu Province. In this paper, the data quality of the Mobile X-band dual-polarization radar is analyzed by using the field observation data of this radar, CINRAD/SA radar in Yancheng , and the data of six rainfall stations in Jiangsu Province. The results show that in the range of 0-30km, the x-band dual-polarizationo weather radar attenuates only in the high reflectivity value, but seriously outside 30km. In order to reduce the observation error caused by attenuation, the difference reflectivity Zdr and Correlation Coefficient ρhv(0) are corrected by signal-to-noise ratio (SNR) to improve the data quality for ground or biological clutter removing. Then the Kdp or φdp after quality control is used to express the total bidirectional reflectivity factor attenuation correction at the distance of R(km) in rain. In last, The paper shows that the data quality of the revised Mobile x-band dual polarization radar is improved.
文章编号:202001090012     中图分类号:    文献标志码:
基金项目:国家重点研发计划“龙卷精细化结构和演变特征研究”
引用文本:
张林,李峰,冯婉悦,刘新安,.The Research of Data Quality Analysis and Bias Correction onMobile X-band Dual-Polarization Weather Radar[J].Meteor Mon,():-.
Zhang Lin,Li Feng,Feng Wanyue,Liu Xinan,.The Research of Data Quality Analysis and Bias Correction onMobile X-band Dual-Polarization Weather Radar[J].Meteor Mon,():-.