| 新一代天气雷达均一性评估 |
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| 引用本文： | 叶飞,梁海河,文浩,银莲,李林蔚.新一代天气雷达均一性评估[J].气象科技,2020,48(3):322-330. |
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| 作者姓名： | 叶飞 梁海河 文浩 银莲 李林蔚 |
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| 作者单位： | 内蒙古自治区大气探测技术保障中心,呼和浩特010051;中国气象局气象探测中心,北京100081;中国气象局气象探测中心,北京100081;内蒙古自治区气象台,呼和浩特010051;内蒙古自治区大气探测技术保障中心,呼和浩特010051 |
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| 基金项目： | 国家重点研发计划“分级质控和多源资料快速融合分析技术”（2018YFC1507502）、中国气象局预报预测业务（OT20191085）项目资助 |
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| 摘 要： | 为实现对全国天气雷达不同波段、不同型号、不同区域的回波差异进行检测和评估,确保雷达组网数据的均一性,利用经过严格数据质量控制后的单站雷达CAPPI格点数据,建立了可靠的相邻雷达回波强度均一性检测算法,并根据我国天气雷达回波差异实际状况制定了均一性评估标准,实现均一性算法的业务运行,使雷达观测同一区域回波反射率的实时均一性评估成为可能。从评估结果来看:①S波段雷达整体均一性强于C波段雷达,SA雷达均一性状况最好,CC、CD雷达均一性状况较差;②以SA型号雷达为主的华东、华南地区均一性较好;③雷达波段不一,型号繁多的偏远区域均一性较差。均一性评估系统对有回波但回波强度、回波位置不正确以及雷达数据时间错位的情况,能有效弥补其他质控算法的短板,及时发现雷达回波异常,缩短故障修复时间,提高雷达数据准确性。
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| 关 键 词： | 天气雷达 均一性 评估 |
| 收稿时间： | 2019/6/18 0:00:00 |
| 修稿时间： | 2019/12/27 0:00:00 |
Evaluation of Homogeneity of New Generation Weather Radar |
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| YE Fei,LIANG Haihe,WEN Hao,YIN Lian,LI Linwei.Evaluation of Homogeneity of New Generation Weather Radar[J].Meteorological Science and Technology,2020,48(3):322-330. |
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| Authors: | YE Fei LIANG Haihe WEN Hao YIN Lian LI Linwei |
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| Institution: | (Inner Mongolia Autonomous Sounding Technical Support Center,Hohhot 010051;Meteorological Observation Center,CMA,Beijing 100081;Inner Mongolia Meteorological Observatory,Hohhot 010051) |
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| Abstract: | In order to detect and evaluate the echo differences of different bands, models and regions of the national weather radar and to ensure the homogeneity of radar networking data, a reliable detection algorithm for the homogeneity of adjacent radar echo intensity is established by using the CAPPI lattice data of single station radar after strict data quality control. According to the actual situation of weather radar echo difference in China, the uniformity evaluation criteria are formulated and the operational running of homogeneity algorithms is realized, which makes it possible to evaluate the real time uniformity of radar echo reflectivity in the same area. From the evaluation results, the overall homogeneity of S band radar is stronger than that of C band radar. The SA radar has the best homogeneity, while the CC and the CD radar have the worse homogeneity. The eastern and southern China, where SA radar is used widely, have better homogeneity. The radar bands are different and the homogeneity of remote areas with various models is poor. The homogeneity evaluation system is applied to the case of having echo intensity, but with incorrect echo location and time misalignment of radar echoes. It can effectively compensate for the shortcomings of other quality control algorithms. It can find abnormal radar echoes in time, shorten the repair time and improve the accuracy of radar data. |
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| Keywords: | weather radar homogeneity evaluation |
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