Method for unattended measurement of surface reflectance in field sites

doi:10.37188/OPE.20233116.2319

CIOMP OpenIR

	Method for unattended measurement of surface reflectance in field sites
	Z. Xia, S. Wang, X. Yi, Y. Wang and W. Fang
	2023
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	31 期号:16 页码:2319-2332
摘要	The performance of on-orbit payloads is inevitably degraded. Field calibration is a primary method of on-orbit radiometric calibration for some satellite payloads，and its accuracy mainly depends on how accurate the surface reflectance is. This study introduces the working principle and system composi⁃ tion of the Automatic Observation System of Surface Reflectance，and unattended，automated，and contin⁃ uous spectral surface reflectance measurements were conducted at the Dunhuang Radiation Calibration Field. The short- and long-term stabilities of the surface reflectance data acquired simultaneously were compared and analyzed using the standard whiteboard and irradiance methods，respectively. The surface reflectance is directly traceable to the reflectance of the standard whiteboard，and the data processing meth⁃ od reduces the calibration transfer link. The results are as follows. The mean deviation of short-term mea⁃ surement of the surface reflectance by the standard whiteboard method is 0. 130%. For the long-term mea⁃ surement，the mean deviation of the 350-600 nm band is 4. 996%，and the mean deviation of the 600-2 500 nm band is 2. 104%. The standard whiteboard method is reasonable and feasible for measuring the surface reflectance，and the figure of reflectance is continuous and smooth，and it has less fluctuation. The accuracy of reflectance can be improved by regularly cleaning the standard whiteboard. The short-term measurement of the irradiance method is similar to that of the standard whiteboard method；the mean devi⁃ ation of the 350-1 900 nm band is 0. 236%，and the mean deviation of the 1 900-2 500 nm band is 0. 443%. For the long-term measurement，the overall drift of the reflectance is small，with an average drift of 0. 735%. However，there is a disadvantage of large local noise in the reflectance curve. The two methods can be combined to obtain accurate surface reflectance data. © 2023 Chinese Academy of Sciences. All rights reserved.
DOI	10.37188/OPE.20233116.2319
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收录类别	ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68038
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Z. Xia, S. Wang, X. Yi, Y. Wang and W. Fang. Method for unattended measurement of surface reflectance in field sites[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2023,31(16):2319-2332.
APA	Z. Xia, S. Wang, X. Yi, Y. Wang and W. Fang.(2023).Method for unattended measurement of surface reflectance in field sites.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,31(16),2319-2332.
MLA	Z. Xia, S. Wang, X. Yi, Y. Wang and W. Fang."Method for unattended measurement of surface reflectance in field sites".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 31.16(2023):2319-2332.

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