TDICCD实时辐射校正系统设计与数据处理  

Design and data processing of TDICCD real-time radiation correction system

作　　者：宁永慧[1] 石俊霞[1] 刘春香[1] Ning Yonghui;Shi Junxia;Liu Chunxiang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,Jilin 130031,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《光电工程》2019年第12期64-71,共8页Opto-Electronic Engineering

基　　金：民用航天预研资助项目(D040101)~~

摘　　要：为了提高星上TDICCD相机成像系统的有效寿命,降低系统在轨运行状态变化后对成像质量的影响,提高星上系统可靠性,设计了星上实时辐射校正系统;通过旋转焦平面,完成星上实时辐射校正与处理,获得多片TDICCD通道间和像元间校正参数,提高相机成像系统的空间适应性和非均匀性指标。在FPGA内部完成校正参数实时存储与处理,并对参数的可靠性、稳定性进行优化。该方法能够实现相机在轨状态下的相机非均匀性校正参数的实时获取。测试结果表明:系统通道内的像元非均匀性能够提高到2.01%,能够实现星上实时辐射校正的功能,获得良好效果。In order to increase the lifetime of the TDICCD imaging system in space and decrease the impact on the imaging quality for a long-time working in orbit, a system of real-time radiation correction in space is designed. It generates real-time correction parameters of multi-TDICCD channels and pixels in-channel by rotating the focus plane before the calculation of the real-time calibration images, and improves the adaptability and PRNU(pixel response non-uniformity) values of the TDICCD mosaic camera imaging system. FPGA is used to calculate and save the parameters, and an optimization design is implemented to improve the system stability and reliability. This method can calculate the real-time PRNU correction parameters of the TDICCD mosaic camera in-orbit, and the PRNU value of TDICCD mosaic camera in-channel reaches 2.01% after real-time calibration. This method is potentially used in real-time radiation calibration, and has got a better result.

关 键 词：TDICCD 实时辐射校正 像元非均匀性 存储控制 FPGA 

分 类 号：V447.3[航空宇航科学与技术—飞行器设计] TP751.1[自动化与计算机技术—检测技术与自动化装置]