江万寿, 张剑清, 张祖勋. 三线阵CCD卫星影像的模拟研究[J]. 武汉大学学报 ( 信息科学版), 2002, 27(4): 414-419.
引用本文: 江万寿, 张剑清, 张祖勋. 三线阵CCD卫星影像的模拟研究[J]. 武汉大学学报 ( 信息科学版), 2002, 27(4): 414-419.
JIANG Wanshou, ZHANG Jianqing, ZHANG Zuxun. Simulation of Three-line CCD Satellite Images from Given Orthoimage and DEM[J]. Geomatics and Information Science of Wuhan University, 2002, 27(4): 414-419.
Citation: JIANG Wanshou, ZHANG Jianqing, ZHANG Zuxun. Simulation of Three-line CCD Satellite Images from Given Orthoimage and DEM[J]. Geomatics and Information Science of Wuhan University, 2002, 27(4): 414-419.

三线阵CCD卫星影像的模拟研究

Simulation of Three-line CCD Satellite Images from Given Orthoimage and DEM

  • 摘要: 在讨论从给定的DEM和相应的正射影像模拟三线阵CCD卫星影像的原理和方法的基础上,通过模拟影像考察两种卫星影像近似核线的适应能力和地球自转效应对同轨立体成像能力的影响,并讨论了从DEM和正射影像确定投影中心轨迹、姿态模拟、共线方程和影像生成等细节。通过试验验证了模拟影像的正确性,揭示了两种核线定义存在的问题及其改进方法

     

    Abstract: Though IKONOS has been flying in the space,there are few chances to get its original images.But in some cases,we need original three-line CCD images to do tests about along-track stereo.In our study,Kratky's rigorous model is adopted,with earth rotation taken into account.With simulated images,we try to investigate several aspects from orientation,epipolar images,and the Earth rotation effects on along-track stereo.With DEM and orthoimage generated from SPOT image of the Three Gorges area by VirtuoZo,several experiments have been done.Some conclusions can be drawn:①In order to get large overlap of fore-look and aft-look image,side-look angle must be considered for them,and the angle should be adjusted according to the latitude of satellite position;②The polynomial fits for SPOT images'epipolar relation does not fit along-track stereo any longer,but increasing items of the polynomial can increase the fitting accuracy significantly;③The epipolar accuracy of Baltsavias'method depends on the accuracy of orientation parameter of images;④Systematic errors may exist in epipolar images generated by Baltsavias'method,which can be removed with linear fitting.

     

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