摘要
高分辨率光学(简称"高分")卫星影像普遍以标准景的形式提供给用户,并附带有理多项式模型(rational function model,RFM)。尽管同一轨道高分影像的姿态和轨道误差较为稳定,然而由于RFM的参数没有清晰的物理意义,因此难以建立同一轨道影像间的几何约束关系。从条带影像与标准景影像的差异出发,考虑标准景影像的分景效应以及积分时间差异的影响,提出了基于像方多项式模型的同轨约束方法,可对同轨道、不连续的标准景影像进行约束,实现基于同轨约束的高分卫星影像区域网平差。通过用我国资源三号(ZY-3)测绘卫星同轨7景三线阵立体影像和印度IRS-P5卫星两轨4景两线阵立体影像进行实验,证明所提出的同轨约束区域网平差模型能减少对控制点的需求,提高平差精度。
Generally, standard scenes with rational function model （RFM）are provided to users as the common form of high resolution satellite images. Since RFM parameters lack clear physical significance, the geometric constraint relationship of standard scenes in the same stripe could hardly be established even though both attitude and ephemeris errors are stable in the same stripe. On the basis of the difference between stripe scenes and standard scenes, as well as in consideration of the offset effect and integral time differences of standard scenes, a stripe constraint method based on the image - space polynomial model is proposed in this paper, which could be used to constrain the discontinuous standard scenes in the same stripe and realize the stripe - constrained block adjustment of high - resolution images. Triplet stereos covering seven standard scenes of ZY - 3 and two adjacent stripes of IRS - P5 were used for the experiment. The results show that, with the proposed method in this paper, less ground control points are required for block adjustment with the same stripe constraint, and the higher accuracy is promised as well.
出处
《国土资源遥感》
CSCD
北大核心
2016年第3期46-52,共7页
Remote Sensing for Land & Resources
基金
中国博士后科学基金面上项目"高分辨率光学卫星姿态模型研究"(编号:2015M572268)
中国测绘科学研究院基本科研业务费项目共同资助
关键词
高分卫星影像
同轨约束
区域网平差
有理多项式模型(RFM)
high resolution satellite image
same strip constraint
block adjustment
rational function model （ RFM ）
