风云三号B星中分辨率光谱成像仪响应衰变分析

大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (5): 376-383.

风云三号B星中分辨率光谱成像仪响应衰变分析

史剑民1，胡秀清2，徐文斌1，郑小兵1

(1 中国科学院通用光学定标与表征技术重点实验室，安徽合肥 230031;
2 中国气象局国家卫星气象中心，北京 100081 )

收稿日期:2014-03-11 修回日期:2014-04-17 发布日期:2014-09-16
通讯作者: 史剑民(1988-)，男，安徽合肥人，硕士研究生，主要从事卫星遥感器定标方面的研究。 E-mail:hefeixiaoshi@126.com
作者简介:史剑民(1988-)，男，安徽合肥人，硕士研究生，主要从事卫星遥感器定标方面的研究。

Analysis on Response Degradation of Medium Resolution Spectral Imager on FY-3B

SHI Jian-min1, HU Xiu-qing2, XU Wen-bin1, ZHENG Xiao-bing1

(1 Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei 230031, China;
2 National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China)

Received:2014-03-11 Revised:2014-04-17 Online:2014-09-16

摘要/Abstract

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。本文分析了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。星上定标器除通道1(470nm)年衰变率超过7.0%外，其余通道年衰变率小于5.0%。MERSI 470-565nm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%。

关键词: 中分辨率光谱成像仪, 星上定标, 响应衰变

Abstract:

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(470nm) which has noticeably annual degradation rate over 7.0%/year. The short wavelength bands (470-565nm) of MERSI have an annual degradation rate performance more than 10.0%/year while the longer wavelength bands with annual degradation rate less than 4.0%/year during the past two years.

Key words: Medium Resolution Spectral Imager, onboard calibration, respnse degradation

中图分类号:

TP979

史剑民胡秀清徐文斌郑小兵. 风云三号B星中分辨率光谱成像仪响应衰变分析[J]. 大气与环境光学学报, 2014, 9(5): 376-383.

SHI Jian-Min, HU Xiu-Qing, XU Wen-Bin, ZHENG Xiao-Bing. Analysis on Response Degradation of Medium Resolution Spectral Imager on FY-3B[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(5): 376-383.

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