ZHOU Shuyue,LI Jing,XIAN Lin,et al.Weather Radar Beam Block Correction Algorithm based on DEM Model and Vertical Profile of Reflectivity[J].Journal of Chengdu University of Information Technology,2023,38(05):497-502.[doi:10.16836/j.cnki.jcuit.2023.05.001]
基于数字高程模型和反射率因子垂直廓线的天气雷达波束遮挡订正算法
- Title:
- Weather Radar Beam Block Correction Algorithm based on DEM Model and Vertical Profile of Reflectivity
- 文章编号:
- 2096-1618(2023)05-0497-06
- 关键词:
- 天气雷达; 数字高程资料; 波束遮挡; 反射率因子平均垂直廓线
- Keywords:
- weather radar; digital elevation model; beam block; MVPR
- 分类号:
- TN959.4
- 文献标志码:
- A
- 摘要:
- 天气雷达在部署时如果周围存在山体，雷达波束将会在山体附近受到部分遮挡甚至是完全遮挡，会对雷达探测范围和雷达数据的准确性产生较大影响。为解决波束遮挡问题，使用北京地区的SRTM数字高程数据，模拟位于北京房山的X波段双偏振雷达的波束遮挡情况，计算雷达体扫各层的波束遮挡率并与雷达反射率图片进行对比以验证其可行性。依据波束遮挡率，选取根据非遮挡区域的反射率因子计算的平均垂直廓线对雷达的部分波束遮挡区域的反射率因子进行订正，并通过定量分析对平均垂直廓线法进行订正效果分析。结果表明:数字高程模型模拟的波束遮挡率能较好地代表雷达的波束遮挡情况，平均垂直廓线法能够较好地订正天气雷达的波束阻挡区域的反射率，但其订正效果容易受到生成廓线区域选择的影响。
- Abstract:
- When the weather radar is located near a tall mountain,the radar beam can be partially or even completely blocked near the mountain, which will have a great impact on the radar detection range and the accuracy of radar data. In this paper, the SRTM digital elevation data of Beijing area is used to calculate and analyze the beam blocking fraction of the X-band dual-polarization radar located in Fangshan, Beijing. And according to the beam occlusion rate, the vertical profile of reflectivityis used to correct the reflectivity dataofpartially beam block area, and the correction effect of the average vertical profile method is analyzed by quantitative analysis. The results show that the mean vertical profile method can better correct the reflectivity of the beam blocking area of the weather radar, but its effect can be easily affected by the selection of area which is used to generate profile.
参考文献/References:
[1] 王超.X波段双偏振雷达数据质控方法研究[D].成都:成都信息工程大学,2019:1-2.
[2] Harrold T,English E,Nicholass C.The accuracy of radar-derived rainfall measurements in hilly terrain[J].Quarterly Journal of the Royal Meteorological Society 1974,100(425):331-350.
[3] Vulpiani G,Montopoli M,Passeri L D,et al.On the Use of Dual-Polarized C-Band Radar for Operational Rainfall Retrieval in Mountainous Areas[J].Journal of Applied Meteorology and Climatology,2012,51(2):405-425.
[4] Ryzhkov A,Diederich M,Zhang P,et al.Potential Utilization of Specific Attenuation for Rainfall Estimation,Mitigation of Partial Beam Blockage,and Radar Networking[J].Journal of Atmospheric and Oceanic Technology,2014,31(3):599-619.
[5] 张亚萍,刘钧,夏文梅,等.雷达定量估测区域降水波束阻挡系数的计算[J].南京气象学院学报,2002(5):640-647.
[6] 肖艳姣.新一代天气雷达三维组网技术及其应用研究[D].南京:南京信息工程大学,2007:37-44.
[7] 勾亚彬,刘黎平,李瑞义,等.基于雷达回波概率特征的雷达部分遮挡区域识别算法[J].高原气象,2015,34(2):556-567.
[8] 张培昌,杜秉玉,戴铁丕.雷达气象学[M].2版.北京:气象出版社,2008:118-119.
[9] 柳云雷,李昌兴,张乐坚,等.基于高分辨率高程数据统计分析新一代天气雷达组网的地形遮挡影响[J].气象学报,2020,78(4):705-720.
[10] 张培昌,王振会.天气雷达回波衰减订正算法的研究(I):理论分析[J].高原气象,2001(1):1-5.
[11] 李睿.复杂地形下高分辨率降雨雷达网数据质量控制及雨量估测研究[D].成都:成都理工大学,2019:104-107.
[12] 杨泷,刘黎平,王红艳.利用反射率因子垂直廓线填补雷达波束遮挡区的方法研究[J].气象科技,2015,43(5):788-793.
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备注/Memo
收稿日期:2022-10-04
基金项目:国家自然科学基金资助项目(U1733103)