红外与毫米波学报2021，Vol.40Issue(5)：655-663,9.DOI:10.11972/j.issn.1001-9014.2021.05.012
基于可控内定标源的星上红外遥感相机非均匀性校正方法
On-orbit non-uniformity correction method for infrared remote sensing systems using controllable internal calibration sources
摘要
Abstract
Numerous detectors and the large time scale make non-uniformity correction(NUC)challenging for aninfrared focal plane array. Typical calibration systems for infrared remote sensing systems block the full optical pupil and expose the sensor to an on-board calibration source(blackbody)and may also point to deep space as a calibration source. It is impractical(or expensive)to calibrate the high dynamic range remote sensing system with an on-orbit full aperture calibration source. This paper proposes and simulates an internal calibration system wherein a controllable internal calibration illumination is superimposed on the space imagery. The CICS-NUC method is applicable to the NUC when the calibration source adopts steady-state mode. After a comprehensive simulation analysis,an on-orbit NUC method based on the controllable internal calibration sources(CICS-NUC) is proposed using this type of calibrator. The proposed approach provides effective NUC without blocking the full optical pupil when the sensor stares at deep space. After executing the proposed NUC method,the non-uniformity of the evaluation image was reduced from an initial pre-correction value of 15. 87％ to a post-NUC value of 1. 2％. The proposed approach has advantages of high efficiency,adaptability,and real-time processing. In addi-tion,compared with the scheme of cutting a large extended blackbody into the imaging optical path,the simple structure and compact design of the internal calibration device reduce system costs.关键词
红外遥感/辐射定标/在轨/高动态范围/基于场景非均匀性校正Key words
infrared remote sensing/radiometric calibration/on-orbit/high dynamic range/scene-based non-uniformity correction分类
信息技术与安全科学引用本文复制引用
盛一成,顿雄,裘溯,李力,金伟其,王霞..基于可控内定标源的星上红外遥感相机非均匀性校正方法[J].红外与毫米波学报,2021,40(5):655-663,9.基金项目
This work was supported by the National Natural Science Foundation of China(61871034),the 13th Five-Year Plan Pre-study Founda?tion of the Army Armament Department of China(3010204004104)and the National Key R&D Program of China(2018YFB0504900). （61871034）
