风云三号微波大气探测载荷辐射定标

风云三号气象卫星是我国第二代极轨业务气象卫星，具有全球、全天候和多光谱探测能力，装载有微波温度计和微波湿度计2台微波大气探测载荷，自2008年首发星升空后，风云三号微波大气探测载荷资料在防灾减灾和数值天气预报同化应用中发挥了积极作用。风云三号气象卫星微波载荷辐射定标是从原始观测计数值出发获取目标亮温的数据处理技术过程，包括发射前定标、在轨星上定标、综合辐射定标和历史资料再定标4个技术环节。精确的辐射定标是星载被动微波辐射计遥感资料定量应用的基础。本文综述了风云三号气象卫星微波大气探测载荷综合辐射定标技术，介绍了风云三号微波大气探测载荷综合辐射定标基本原理及技术现状，展望了风云气象卫星微波大气探测载荷综合辐射定标技术未来发展。

Radiometric Calibration Technology of Microwave Atmospheric Sounders of FY-3 Satellites

FY-3 meteorological satellite is the second generation of polar orbit operational meteorological satellite in China. It has global， all-weather and multispectral detection capabilities， and is loaded with two microwave atmospheric sounding payloads of MWTS and MWHS. Since the first satellite launched in 2008， FY-3 microwave atmospheric sounders have played an active role in disaster prevention and numerical weather prediction. The radiometric calibration of FY-3 meteorological satellite is a data processing process of obtaining the target brightness temperature from the original observation data， which includes four technical links： pre-launch calibration， on orbit calibration， comprehensive radiometric calibration and historical data re-calibration. Accurate radiometric calibration is the basis of quantitative application of satellite passive microwave radiometer remote sensing data. This paper summarizes the comprehensive radiometric calibration technology of the microwave atmospheric sounders of FY-3 meteorological satellite， expounds the basic principle and technical status of the comprehensive radiometric calibration technology of the microwave atmospheric sounding load of FY-3 meteorological satellite， and looks forward to the future development of the comprehensive radiometric calibration technology of the microwave atmospheric sounding load of FY-3 meteorological satellite.