FY-3降水测量雷达外定标试验场的大气衰减特性分析

吴琼; 商建; 尹红刚; 陈林; 谷松岩

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DOI:10.7519/j.issn.1000-0526.2024.102601

气象:2025,51(2):221-228

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FY-3降水测量雷达外定标试验场的大气衰减特性分析

吴琼,商建,尹红刚,陈林,谷松岩

(国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081)

Analysis of Atmospheric Attenuation Characteristics of FY-3 Precipitation Measurement Radar External Calibration Test Field

WU Qiong，SHANG Jian，YIN Honggang，CHEN Lin，GU Songyan

(National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081)

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投稿时间：2024-04-08 修订日期：2024-10-08

中文摘要: 利用2023年锡林浩特国家高空气象观测站的全年探空资料，分析了风云三号降水测量雷达外定标试验场地的大气衰减特性。通过挖掘大气可降水总量和路径积分衰减的关系，建立了一种快速估算大气衰减量的方法。结果表明，氧气衰减的年变化很小，水汽衰减则具有明显的季节特征。此外，水汽衰减和水汽总量密切相关，Ku波段的水汽衰减在数值上约为水汽总量的1/250，Ka波段的水汽衰减约为Ku波段的4倍。并且，基于快速方法估算的衰减和常规方法计算的衰减相比，两者之间具有很好的一致性，表明快速方法合理可行。大气衰减的计算和分析可以为降水测量雷达外定标试验的顺利开展奠定基础。

中文关键词: 探空，降水测量雷达，外定标，大气衰减，大气可降水总量

Abstract:The atmospheric attenuation characteristics of the FY-3 precipitation measurement radar external calibration test field were analyzed based on sounding data from the National High Altitude Meteorological Observatory in Xilinhot throughout 2023. A quick method for estimating atmospheric attenuation has been established by exploring the relationship between total precipitation water and attenuation. The results indicate that the annual variation of oxygen attenuation is very small, while water vapor attenuation has obvious seasonal characteristics. In addition, the attenuation of water vapor is closely related to the total amount of water vapor. The attenuation of water vapor in Ku-band is numerically equivalent to approximately 1/250 of the total amount of water vapor, and the attenuation of water vapor in Ka-band is approximately 4 times that of the Ku-band. Moreover, there is good consistency between the attenuation estimated by the quick method and the attenuation calculated by the normal method, which indicates that the quick method is reasonable and feasible. The calculation and analysis of atmospheric attenuation could lay a foundation for the smooth implementation of precipitation radar external calibration experiments.

keywords: sounding, precipitation measurement radar, external calibration, atmospheric attenuation, total precipitation water

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基金项目:国家重点研发计划（2023YFB3905900、2023YFB3905903）、中国气象局青年创新团队项目（CMA2023QN12）和中国气象局创新发展专项（CXFZ2024J062）共同资助

作者	单位
吴琼	国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081
商建	国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081
尹红刚	国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081
陈林	国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081
谷松岩	国家卫星气象中心（国家空间天气监测预警中心），北京 100081；许健民气象卫星创新中心，北京 100081；中国气象局遥感卫星辐射测量和定标重点开放实验室，北京 100081

Author Name	Affiliation
WU Qiong	National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081
SHANG Jian	National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081
YIN Honggang	National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081
CHEN Lin	National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081
GU Songyan	National Satellite Meteorological Centre (National Centre for Space Weather), Beijing 100081； Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081； Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, CMA, Beijing 100081

引用文本：
吴琼,商建,尹红刚,陈林,谷松岩,2025.FY-3降水测量雷达外定标试验场的大气衰减特性分析[J].气象,51(2):221-228.
WU Qiong,SHANG Jian,YIN Honggang,CHEN Lin,GU Songyan,2025.Analysis of Atmospheric Attenuation Characteristics of FY-3 Precipitation Measurement Radar External Calibration Test Field[J].Meteor Mon,51(2):221-228.