干旱区生态环境知识资源中心(Arid): Nonlinear Detector Response of Aqua MODIS Land Imaging Bands

Arid

DOI	10.1109/TGRS.2021.3075384
	Nonlinear Detector Response of Aqua MODIS Land Imaging Bands
	Twedt, Kevin A.; Henderson, Sarah; Xiong, Xiaoxiong; Angal, Amit; Geng, Xu
通讯作者	Twedt, KA (corresponding author), Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN	0196-2892
EISSN	1558-0644
出版年	2022
英文摘要	The detectors in the Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) reflective solar bands (RSBs) are calibrated assuming a linear relationship between the observed top-of-atmosphere radiance and the instrument output response. Any nonlinear behavior in the system response can contribute to errors in NASA's Level 1B MODIS reflectance and radiance products, which are used in a wide variety of Earth science applications. While most RSB detectors continue to have very linear behavior even after more than 18 years of operation, we present evidence that the detectors in Aqua MODIS bands 1 (645 nm) and 2 (858 nm) have deviations from gain linearity that change over the mission by up to 3%. We show a clear divergence between gain measurements made with the onboard solar diffuser (SD) at two different radiance levels, achieved by collecting data both with and without an attenuation screen. Radiance trends from lunar calibrations and typical desert and ocean scenes are also compared. We present a simple method to characterize the response nonlinearity using a quadratic function by combining the results of the two sets of SD calibrations. Applying this quadratic calibration algorithm to the desert and lunar data results in improved agreement in their long-term radiance trends. A clear understanding of the magnitude of the gain nonlinearity could be useful to help improve the quality of numerous MODIS science products, including the land imaging applications that rely heavily on these bands.
英文关键词	Calibration MODIS Moon Detectors Market research Earth Extraterrestrial measurements Moderate Resolution Imaging Spectroradiometer (MODIS) nonlinear reflective solar bands (RSBs)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000732789000001
WOS关键词	SCAN-ANGLE CHARACTERIZATION ; CALIBRATION
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374579
作者单位	[Twedt, Kevin A.; Henderson, Sarah; Angal, Amit; Geng, Xu] Sci Syst & Applicat Inc, Lanham, MD 20706 USA; [Xiong, Xiaoxiong] NASA, Sci & Explorat Directorate, Goddard Space Flight Ctr GSFC, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Twedt, Kevin A.,Henderson, Sarah,Xiong, Xiaoxiong,et al. Nonlinear Detector Response of Aqua MODIS Land Imaging Bands[J],2022.
APA	Twedt, Kevin A.,Henderson, Sarah,Xiong, Xiaoxiong,Angal, Amit,&Geng, Xu.(2022).Nonlinear Detector Response of Aqua MODIS Land Imaging Bands.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING.
MLA	Twedt, Kevin A.,et al."Nonlinear Detector Response of Aqua MODIS Land Imaging Bands".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2022).