CAJ | 학술논문

星上相对定标已成为在轨辐射定标链中的重要环节。星上相对定标系统采用 LED 作为定标光源，在完成LED空间适用性的研究基础上，对定标光源的老炼和筛选方法进行了描述，重点介绍了星上相对定标系统的组成、非均匀照明的定标工作原理，并针对宽视场空间光学相机开展了在轨定标测试与验证试验。对星地间定标图像数据进行比对，并给出了各像元的校正因子。该星上定标系统具有较强的空间适应性，综合不确定度为2.9%，能够满足宽视场空间光学相机星上相对辐射定标要求。
성상상대정표이성위재궤복사정표련중적중요배절。성상상대정표계통채용 LED 작위정표광원，재완성LED공간괄용성적연구기출상，대정표광원적노련화사선방법진행료묘술，중점개소료성상상대정표계통적조성、비균균조명적정표공작원리，병침대관시장공간광학상궤개전료재궤정표측시여험증시험。대성지간정표도상수거진행비대，병급출료각상원적교정인자。해성상정표계통구유교강적공간괄응성，종합불학정도위2.9%，능구만족관시장공간광학상궤성상상대복사정표요구。
Spaceborne relative calibration has become an important link in the course of optical camera’s on-orbit radiation calibration. A spaceborne relative calibration system is introduced and LED is selected as light source. LED’s seasoning and screening methods are described on the basis of analyzing LED’s applicability in space optical camera’s calibration, then the system composition and operational principle of nonuniform illumination is emphatically introduced, and a large field space optical camera’s on-orbit radiation calibration and verification experiment is carried out based on the spaceborne relative calibration system. The difference between on-orbit calibration data and on-ground calibration data is analyzed, and pixels’ correction factors are given. The spaceborne relative radiation calibration system has wonderful space applicability and the calibration uncertainty is 2.9%, so it can satisfy the requirement of the large field space optical camera’s spaceborne relative calibration.