The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera

doi:10.3390/rs13193823

	The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera
	Chen, Feinan 2; Luo, Donggen 2; Li, Shuang 2; Yang, Benyong 2; Sun, Liang 2; Ge, Shule 1; Hong, Jin 2
刊名	REMOTE SENSING
	2021-10-01
卷号	13
关键词	DPC BRDF SNES LNES radiometric calibration
DOI	10.3390/rs13193823
通讯作者	Chen, Feinan(feinan123@aiofm.ac.cn)
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.
资助项目	National Natural Science Foundation of China (NSFC)[11504383] ; National Natural Science Foundation of China (NSFC)[41875042] ; Advanced Polarimetric Remote Sensing Technique and Applications Project[GJTD-2018-15]
WOS关键词	IN-FLIGHT CALIBRATION ; CROSS-CALIBRATION ; DESERT SITES ; SATELLITE ; REFLECTANCE ; RAYLEIGH ; MODELS
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:000726254300001
资助机构	National Natural Science Foundation of China (NSFC) ; Advanced Polarimetric Remote Sensing Technique and Applications Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126780]
专题	中国科学院合肥物质科学研究院
通讯作者	Chen, Feinan
作者单位	1.China Ctr Resources Satellite Data & Applicat, Beijing 100094, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei 230031, 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]. REMOTE SENSING,2021,13.
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.
MLA	Chen, Feinan,et al."The Operational Inflight Radiometric Uniform Calibration of a Directional Polarimetric Camera".REMOTE SENSING 13(2021).