气象科技进展Issue(4)：60-70,11.DOI:10.3969/j.issn.2095-1973.2013.04.007
风云三号B星红外分光计的定标和验证
Calibration and Validation of the InfraRed Atmospheric Sounder Onboard the FY3B Satellite
摘要
Abstract
InfraRed Atmospheric Sounder (IRAS) instruments were successfully launched onboard the FengYun-3A (FY3A) and FengYun-3B (FY3B) satellites on May 27, 2008, and November 5, 2010, respectively. They aim at providing multichannel radiances within the spectral range of visible to infrared (IR) wavelengths for many environmental applications, including data assimilation and retrievals of global atmospheric temperature and humidity proifles. However, the velocity of the iflter wheel of the ifrst IRAS onboard FY3A is unstable and, therefore, induced a discontinuity in the measurement. The IRAS onboard FY3B works well in normal and stable operational mode since its launch without any anomaly. A variety of postlaunch calibration/validation tasks are conducted using on-orbit data during a period of three months. This paper presents on-orbit veriifcation of IRAS instrument performance, including long-term trends of the space and warm calibration counts and noise equivalent delta radiance. The Earth scenes observed simultaneously by IRAS and Meteorological Operational Satellite Programme (METOP)/Infrared Atmospheric Sounding Interferometer were obtained and compared to demonstrate a close similarity between the two measurements. Furthermore, the IR channel observations from FY3B/IRAS are compared with those from National Oceanic and Atmospheric Administration-19/High Resolution Infrared Radiation Sounder (HIRS) equivalent channels and simulations from a radiative transfer model. The results show that some of IRAS IR channels perform very well, particularly for channels 1-10, 15, 19, and 20, compared to those of HIRS. Several channels, such as 13, 16, and 18, however, display some large biases. The causes of these increased biases are still under investigation.关键词
定标验证/风云3号/红外分光计(IRAS)/在轨定标Key words
Calibration validation/FengYun 3/InfraRed Atmospheric Sounder (IRAS)/on-orbit calibration引用本文复制引用
漆成莉,陈勇,刘辉,吴春强,殷德奎..风云三号B星红外分光计的定标和验证[J].气象科技进展,2013,(4):60-70,11.基金项目
国家重点基础研究发展计划（973计划）项目（2010CB951600）；公益性行业（气象）科研专项 （）
