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气象:2023,49(4):478-486
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陕西天气雷达覆盖率评估与分析
白水成,高山,刘畅,任丹阳,李军,曹梅,张颖梅,樊婷丽
(西安市大气探测中心,西安 710014)
Evaluation and Analysis of the Coverage Rate of Shaanxi Weather Radar
BAI Shuicheng,GAO Shan,LIU Chang,REN Danyang,LI Jun,CAO Mei,ZHANG Yingmei,FAN Tingli
(Xi’an Meteorological Observation Center of Shaanxi Province, Xi’an 710014)
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投稿时间:2022-01-08    修订日期:2022-08-01
中文摘要: 提出计算地表任意一点上空对应的特定高度的雷达探测覆盖率的方法,并利用地形高程数据,研究了陕西及周边省份23部新一代天气雷达的探测能力。此外,对3部高山雷达站负仰角观测模式进行了数值模拟,给出最优的最低观测仰角。结果表明,新一代天气雷达对陕西上空不同高度的一重覆盖率和二重覆盖率分别为:0.5 km高度为48.6%、2.3%,1 km 高度为80.0%、18.9%,2 km高度为98.7%、74.5%,3 km高度为99.9%、97.1%,4 km高度均为100%。将陕西3部X波段天气雷达考虑在内的话,1 km高度的一重覆盖率和二重覆盖率分别提升至82.7%、32.1%。在此基础上,依据年平均降雨量、GDP和人口数量,提出了计算陕西境内雷达覆盖盲区(县)建设雷达优先级的方法。研究可为未来在雷达覆盖盲区建设天气雷达提供理论和技术支撑。
Abstract:This paper proposes a method to calculate the radar detection coverage with a specific altitude corresponding to one point on the surface, and uses the terrain elevation data to analyze the detection capabilities of 23 new-generation weather radars in Shaanxi and surrounding provinces. Additionally, the paper also does the numerical simulation of the negative elevation angle observation mode and obtains the optimal minimum observation elevation angle of the three mountaintop radars. The results show that the primary and secondary coverage rates of the new-generation weather radar at different altitudes over Shaanxi are:48.6% and 2.3% at 0.5 km, 80.0% and 18.9% at 1 km, 98.7% and 74.5% at 2 km, 99.9% and 97.1% at 3 km and 100% at 4 km height. Considered the 3 X-band weather radars of Shaanxi, the primary and secondary coverage rates are increased to 82.7% and 32.1% respectively at 1 km. On this basis, a method using the average annual rainfall, GDP and population data are suggested to calculate the priority of radar coverage in blind areas and counties in Shaanxi Province. The findings of this study could provide a theoretical and technical support for the building of weather radar in the blind area of radar coverage in the future.
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基金项目:陕西省西安市科技计划项目(20SFSF0015)、陕西省气象局秦岭和黄土高原生态环境气象重点实验室开放研究基金项目(2020G-18)共同资助
引用文本:
白水成,高山,刘畅,任丹阳,李军,曹梅,张颖梅,樊婷丽,2023.陕西天气雷达覆盖率评估与分析[J].气象,49(4):478-486.
BAI Shuicheng,GAO Shan,LIU Chang,REN Danyang,LI Jun,CAO Mei,ZHANG Yingmei,FAN Tingli,2023.Evaluation and Analysis of the Coverage Rate of Shaanxi Weather Radar[J].Meteor Mon,49(4):478-486.