空间太阳望远镜星载偏振图像高速处理技术  

On-Board Polarized Images High-Speed Processing Technology for Space Solar Telescope

作　　者：王宇舟[1] 金声震[1] 宁书年[2] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国矿业大学机电与信息工程学院,北京100083

出　　处：《中国矿业大学学报》2005年第5期630-635,共6页Journal of China University of Mining & Technology

基　　金：863计划(8632.5.1.25)

摘　　要：空间太阳望远镜(SST)是我国独立发展的太阳磁场观测科学卫星;其主光学望远镜8个CCD以20M B/s的速率采集太阳偏振磁图;图像处理系统需要进行图像积分、CCD辐射劣化校正、目标的几何改正、Stokes参数计算和图像格式化等处理.SST在轨实时数据运算量达每秒数十亿次,我国现有星载计算机系统的处理能力远远达不到SST的需求.针对这一问题,在系统处理任务分析的基础上,设计出了并行阵列处理的系统体系结构,并在单通道子系统样机的研制上,采用了FPGA加DSP的模块结构,在FPGA内设计了在线实时积分器,由DSP进行离线计算和格式化处理;还给出了DSP软件流程图;进行了系统仿真和原理样机的制作,经测试表明:该系统达到了SST的星载高速数据处理要求.这种新型高速数据处理方法,可以广泛应用于我国未来航天的高速数据处理领域.Space Solar Telescope （SST） is a magnetic field observation satellite. Its 8 CCDs of Main Optical Telescope （MOT） collect solar magnetic images with a velocity of 20 MB/s; Data processing system deals with such process as image integral, CCD calibration, object geometric correction, calculation of Stokes parameters and image formatting. SST＇s on-board real-time data calculation volume is several billion times per second, and current on-board computer system can＇t complete SST＇s tasks. On the basis of system processing tasks analysis, a parallel array processing system architecture is presented; During single channel subsystem development, FPGA and DSP module parallel array structure is adopted, in which the on-line real-time integrator is designed inside FPGA, and off-line calculation and image formatting is performed by DSP; DSP＇s software flowchart is also presented; System functional prototype is emulated and proved. The new highspeed data processing method can be also used in future space high-speed data processing fields.

关 键 词：并行阵列处理结构 图像积分 图像格式化 FPGA ADSP21060 

分 类 号：V447[航空宇航科学与技术—飞行器设计] V443