Calibration for the Solar Reflective Bands of Medium Resolution Spectral Imager Onboard FY-3A

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	Calibration for the Solar Reflective Bands of Medium Resolution Spectral Imager Onboard FY-3A
	Hu, XQ; Sun, L; Liu, JJ; Ding, L; Wang, XH; Li, Y; Zhang, Y; Xu, N; Chen, L
刊名	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
	2012
卷号	50 期号:12
英文摘要	The Medium Resolution Spectral Imager (MERSI) is a key instrument onboard Fengyun-3 (FY-3), the second generation of polar-orbiting meteorological satellites in China. This paper summarizes the knowledge of MERSI instrument in terms of sensor design, calibration algorithm, prelaunch and on-orbit characterization, and performance verification. The calibration monitoring of its reflective solar bands (RSBs) is primarily conducted using a visible onboard calibrator and found that it has a significant degradation on the order of 10% in its shorter RSB bands (<500 nm), with the largest in band 8 of about 20% during the past two years. However, the performance at longer wavelength bands is relatively stable with a change of less than 5%. It is shown that the postlaunch calibration of the two short-wavelength infrared bands has frequent fluctuations because of random jumps in their electronic gains. These results are consistently verified by two kinds of vicarious calibration (VC) methods: China Radiometric Calibration Sites VC and intercalibration using Terra/Moderate Resolution Imaging Spectroradiometer over Dunhuang desert. The overall uncertainty in the MERSI top-of-atmosphere radiance or reflectance is less than 5%. These results provide the important reference and evaluation for the update of the FY-3A/MERSI calibration coefficients.
WOS记录号	WOS:000311791100009
公开日期	2013-03-18
内容类型	期刊论文
源URL	[http://202.127.1.142/handle/181331/6929]
专题	上海技术物理研究所_上海技物所
推荐引用方式 GB/T 7714	Hu, XQ,Sun, L,Liu, JJ,et al. Calibration for the Solar Reflective Bands of Medium Resolution Spectral Imager Onboard FY-3A[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2012,50(12).
APA	Hu, XQ.,Sun, L.,Liu, JJ.,Ding, L.,Wang, XH.,...&Chen, L.(2012).Calibration for the Solar Reflective Bands of Medium Resolution Spectral Imager Onboard FY-3A.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,50(12).
MLA	Hu, XQ,et al."Calibration for the Solar Reflective Bands of Medium Resolution Spectral Imager Onboard FY-3A".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 50.12(2012).