干旱区生态环境知识资源中心(Arid): Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS

Arid

DOI	10.3788/AOS202040.1828001
	Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS
	He Xingwei; Han Qi; Feng Xiaohu; Kang Ning
通讯作者	Han, Q (corresponding author), China Meteorol Adm, Natl Satellite Meteorol Ctr, Beijing 100081, Peoples R China.
来源期刊	ACTA OPTICA SINICA
ISSN	0253-2239
出版年	2020
卷号	40 期号:18
英文摘要	FY-3B medium resolution imaging spectrometer (MERIS) cannot achieve the absolute calibration for the visible and near-infrared bands. To improve the MERIS absolute calibration accuracy, the six widely used north African desert pseudo-invariant targets arc adopted herein, taking the advantage of the high-quality SeaWiFS data to construct the bidirectional reflectance distribution function(BRDF) model and then using the MODTRAN radiative transfer model and ERA-Interim absorption gas reanalysis data to construct the spectral band adjustment factor (SHAF). Lastly, five years of FY-3B MERIS data arc used for the cross-calibration. The constructed BRDF model in this study can accurately express the top of atmosphere (TOA) reflectance (rho(TOA)) over the pseudo-invariant targets, and the prediction error is basically within 3%. The TOA reflectance of MERIS can be effectively predicted through the parameterized SHAF which considers the observation geometry and absorbed gas content. Cross-calibration results show that the time series arc extremely stable and have no obvious trends, which arc consistent with the characters of TOA reflectance over pseudo-invariant targets. Compared with the operational calibration results of MERIS L1, the cross-calibration results of bands 8-12 arc lower and the bias is less than zero, whereas for bands 13-16, the results arc higher and the bias is greater than zero. Except for band 8, the biases of the other eight bands arc within -5%-5%. The monthly mean deviation of bands with a wavelength less than 600 nm arc larger, particularly the three blue bands (bands 8-10). The monthly mean relative deviations of bands 13-16 arc relatively stable, and they arc basically within -5%-5%.
英文关键词	remote sensing medium resolution imaging spectrometer cross-calibration spectral band adjustment factor bidirectional reflectance distribution function
类型	Article
语种	中文
收录类别	ESCI
WOS记录号	WOS:000619237300018
WOS类目	Optics
WOS研究方向	Optics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352508
作者单位	[He Xingwei; Han Qi; Feng Xiaohu; Kang Ning] China Meteorol Adm, Natl Satellite Meteorol Ctr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	He Xingwei,Han Qi,Feng Xiaohu,et al. Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS[J],2020,40(18).
APA	He Xingwei,Han Qi,Feng Xiaohu,&Kang Ning.(2020).Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS.ACTA OPTICA SINICA,40(18).
MLA	He Xingwei,et al."Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS".ACTA OPTICA SINICA 40.18(2020).