干旱区生态环境知识资源中心(Arid): The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera

Arid

DOI	10.3390/rs13193823
	The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera
	Chen, Feinan; Luo, Donggen; Li, Shuang; Yang, Benyong; Sun, Liang; Ge, Shule; Hong, Jin
通讯作者	Chen, FN (corresponding author), Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei 230031, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:19
英文摘要	The directional polarimetric camera (DPC) on-board the GF-5A satellite is designed for atmospheric or water color detection, which requires high radiometric accuracy. Therefore, in-flight calibration is a prerequisite for its inversion application. For large field optical sensors, it is very challenging to ensure the consistency of radiation detection in the whole field of view in the space environment. Our work proposes a vicarious in-flight calibration method based on sea non-equipment sites (visible bands) and land non-equipment sites (all bands). Combined with environmental parameters and radiation transmission calculations, we evaluated the radiation detection accuracy of the 0 & DEG; to 60 & DEG; view zenith angle of the DPC in each band. Our calibration method is based on the single-day normalized radiance data measured by the DPC. Through data selection, enough calibration samples can be obtained in a single day (the number of desert samples is more than 5000, and the number of calibration samples of the ocean is more than 2.8x106). The measurements are compared with the simulation of 6SV VRT code or look-up tables. The massive amount of data averages the uncertainty of a single-point calculation. Although the uncertainty of a single sample is significant, the final fitting of the curve of the variation in the radiometric calibration coefficient with the observation angle can still keep the root mean squared error at approximately 2-3% or even lower, and for visible bands, the calibration results for both ocean sites and desert sites are in good agreement regarding the non-uniformity of the sensor.
英文关键词	DPC BRDF SNES LNES radiometric calibration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000726254300001
WOS关键词	IN-FLIGHT CALIBRATION ; CROSS-CALIBRATION ; DESERT SITES ; SATELLITE ; REFLECTANCE ; RAYLEIGH ; MODELS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; 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/2XILL650/373643
作者单位	[Chen, Feinan; Luo, Donggen; Li, Shuang; Yang, Benyong; Sun, Liang; Hong, Jin] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei 230031, Peoples R China; [Ge, Shule] China Ctr Resources Satellite Data & Applicat, Beijing 100094, Peoples R China
推荐引用方式 GB/T 7714	Chen, Feinan,Luo, Donggen,Li, Shuang,et al. The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera[J],2021,13(19).
APA	Chen, Feinan.,Luo, Donggen.,Li, Shuang.,Yang, Benyong.,Sun, Liang.,...&Hong, Jin.(2021).The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera.REMOTE SENSING,13(19).
MLA	Chen, Feinan,et al."The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera".REMOTE SENSING 13.19(2021).