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1. 中国科学院 研究生院 北京,100039
2. 中国科学院 上海技术物理研究所,上海 200083
收稿日期:2006-05-17,
修回日期:2006-10-20,
网络出版日期:2007-01-30,
纸质出版日期:2007-01-30
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原育凯, 李欣耀, 裴云天. 基于模板的FY-2一级杂散光模拟[J]. 光学精密工程, 2007,15(1):45-49.
YUAN Yu-kai, LI Xin-yao, PEI Yun-tian. Simulating first order stray light of FY-2 VISSR using templates[J]. Optics and precision engineering, 2007, 15(1): 45-49.
对FY-2扫描辐射计的光机结构进行了简化
确定出在其南北步进中对杂散光模板变化产生影响的仅仅是折镜边缘
据此结论对产生一级杂散光的相关机械边框建立空间坐标
通过投影方法得出在任意步进位置的杂散光进入区域
并通过对杂散光区域的像元数计数和制作视频文件的方式检查其变化的连续性。从信号光分布最小的世界时19时图像出发
使用快速卷积的方法
进行了点光源、月牙状亮边和地球全图的模拟杂散光形成的计算
得出的结果与实际杂散光的现象较为接近
成为进一步以图像处理方式消除杂散光的基础。
By simplifying the framework of FY-2 VISSR
it was found that the influenceon the transform of first order stray light templates was the rotation of folding mirror edge. Based on the structural parameter of this instrument
those frameworks related to the stray light were discretely sampled
then those sampled points were projected to a plane to be observed by sensors
so the templates of the first order stray light at any angle of the folding mirror in this instrument were established. The continuity of those templates was examined. The forming of first order stray light was simulated with Gaussian point source
crescent-like edge and full disk of earth by convolution with the template
those outputs show the results are relatively close to the phenomenon of real images
and further quantitative suppressing of stray light will be on the way.
. 魏彩英,张晓虎,邱康睦. 风云二号静止气象卫星图像杂散信号分析[J]. 应用气象学报,2004 15(5) :564-571. WEI C Y, ZHANG X H, QIU K M, Analysis of scattered signal in geostationary meteorological satellite image[J]. J. Appl. Meteorol. Sci., 2004, 15(5):564-571.(in Chinese)
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. 戎志国,张玉香,邱康睦,等. 利用敦煌辐射校正场对FY-2B静止气象卫星进行可见光通道的在轨辐射定标[J]. 应用气象学报,2004 15(3) :266-272. RONG Z G, ZHANG Y X, QIU K M, et al.. Radiometric calibration on orbit for FY-2B meteorological satellite's visible channels with the radiometric calibration site of Dunhuang[J].J. Appl. Meteorol. Sci., 2004, 15(3):266-272.(in Chinese)
. 王骞,张景旭,郭劲. 红外系统中杂散辐射的抑制方法 . 光机电信息,2002,(12) :21-24. WANG Q, ZHANG J X, GUO J. The suppressing of stray radiation in infrared system [J]. Opt. Mech. Electron. Inform., 2002, (12):21-24.(in Chinese)
. GUO Q, XU J M, ZHANG W J. Stray light modeling and analysis for the FY-2 meteorological satellite[J]. Int. J. Remote Sens., 2005, 26(13):2817-2830.
. GONZALEZ R C, WOODS R E. 阮秋琦,等译.数字图像处理 [M]. 第二版175207北京:电子工业出版社,2003. GONZALEZ R C, WOODS R E. TRANSLATED , et al.. Digital image processing[M].Beijing:Electronic Industry Press, Second Edition, 2003. (in Chinese)
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