摘要
搭载于风云三号B星（FY-3B）的中分辨率光谱成像仪（MERSI）安装了由积分球和监视探测器组成的太阳反射通道星上定标器。分析了2010年11月13日至2013年4月11日期间的星上定标数据,评估了FY-3B星上定标器和MERSI的响应衰变情况。结果表明,星上定标器的输出和MERSI的响应均存在衰变,且衰变程度与波长有关。除星上定标器除通道1（470 nm）年衰变率超过7.0%外,其余通道年衰变率小于5.0%。MERSI 470～565 nm等短波通道衰变较大,年衰变率超过10.0%;长波通道衰变较小,年衰变率小于4.0%。
An onboard calibrator which consists of integrating minisphere and surveillance detectors for solar reflective bands is carried on the Medium Resolution Spectral Imager（MERSI）.Based on the onboard calibration data from November 13,2010 to April 11,2013 of satellite FY-3B,it is proved that the degradation of MERSI on FY-3B is wavelength dependent.The annual degradation rate of channels on visible onboard calibrator（VOC） is less than 5.0%/year expect for Band 1（470 nm） which has noticeably annual degradation rate over 7.0%/year.The short wavelength bands（470～565 nm） of MERSI have an annual degradation rate performance more than 10.0%/year while the longer wavelength bands with annual degradation rate less than4.0%/year during the past two years.
出处
《大气与环境光学学报》
CAS
2014年第5期376-383,共8页
Journal of Atmospheric and Environmental Optics
关键词
中分辨率光谱成像仪
星上定标
响应衰变
Medium Resolution Spectral Imager
onboard calibration
response degradation
