| 网络化衰减订正方法在北京X波段网络化雷达中的应用 |
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| 引用本文： | 李思腾,马建立,陈明轩,李林,仰美霖,邢峰华.网络化衰减订正方法在北京X波段网络化雷达中的应用[J].气象学报,2021,79(5):804-816. |
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| 作者姓名： | 李思腾 马建立 陈明轩 李林 仰美霖 邢峰华 |
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| 作者单位： | 1.北京城市气象研究院，北京，100089 |
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| 基金项目： | 国家重点研发计划项目（2018YFC1507502）、国家重点研发计划重点专项（2018YFF0300100）、北京市气象局科技项目（BMBKJ201705003） |
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| 摘 要： | 衰减是影响X波段雷达数据质量的主要因素之一，直接影响到X波段雷达在强对流监测预警中的应用效果。文中在分析中、外雷达衰减订正方法的基础上，选择并改进了一种利用雷达网中不同雷达相互订正的方法，该方法通过不断迭代运算，使订正误差达到最小，形成了适合于网络化X波段雷达的反射率因子衰减订正方法。订正结果与原始雷达数据以及差分相位（${\phi _{{}_{{\rm{DP}}}}}$）订正法结果进行对比，并且还同时与北京S波段雷达观测数据进行了对比。结果表明：衰减订正对X波段雷达穿透强降水后的回波以及探测距离较远的回波效果比较明显，订正后的回波与S波段雷达观测结果比较吻合。
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| 关 键 词： | X波段 网络化雷达 衰减订正 双偏振 |
| 收稿时间： | 2021/2/22 0:00:00 |
| 修稿时间： | 2021/6/4 0:00:00 |
The application of network attenuation correction method on the X-band network radar in Beijing |
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| LI Siteng,MA Jianli,CHEN Mingxuan,LI Lin,YANG Meilin,XING Fenghua.The application of network attenuation correction method on the X-band network radar in Beijing[J].Acta Meteorologica Sinica,2021,79(5):804-816. |
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| Authors: | LI Siteng MA Jianli CHEN Mingxuan LI Lin YANG Meilin XING Fenghua |
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| Institution: | 1.Institute of Urban Meteorology，Beijing 100089，China2.Beijing Municipal Meteorological Observation Center，Beijing 100089，China3.Hainan Institute of Meteorological Sciences，Haikou 570203，China |
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| Abstract: | Attenuation is one of the main factors that affect the data quality of X-band radars, which directly affects the application effectiveness of X-band radars in severe convection monitoring and early warning. Based on the analysis of different radar attenuation correction methods, both domestic and abroad, this study improves one of the radar attenuation correction methods that utilizes mutual correction among different radars in the radar network, and establishes a reflectivity factor attenuation correction method that is suitable for networked X-band radars. With the new method, the correction error is minimized through continuous iterative computation. The correction outputs are compared with original radar data and results using the differential phase (${\phi _{{}_{{\rm{DP}}}}}$) correction method as well as observations of the Beijing S-band radar. It is found that the attenuation correction is more effective for the X-band radar echoes that penetrate heavy rainfall or at long detection distance, and the corrected echoes are consistent with the S-band radar observations. |
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| Keywords: | X-band Networked radar Attenuation correction Dual-polarization |
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