首页> 中文期刊> 《航天返回与遥感》 >多谱段光学遥感探测器配准误差分析

多谱段光学遥感探测器配准误差分析

         

摘要

Multispectral images of the same object acquired by remote sensing multispectral camera are different in geometric position, which leads to a registration error of multispectral images. Therefore, registra-tion error of multispectral images is one of the key constraint on the scale production and industrialization ap-plication for Chinese satellites data. Accordingly, the error sources and their influences on registration of com-mon multispectral camera with the same optical system are studied in this paper by the registration error model. In this paper, only the position between images in space camera designing is considered to analyze the non-time-lapse and time-lapse photogrammetry. Non-time-lapse photogrammetry error is caused by the prin-cipal point precision, while time-lapse photogrammetry error is mainly caused by principal point precision and attitude pointing precision and less by satellite velocity precision. At last, the error demand is obtained by emu-lation analysis of image registration error requirement, which can be the references for multispectral camera designing and application.%多光谱相机获取的同一目标在不同谱段图像中几何位置不同,造成了多谱段图像配准误差.而多谱段图像谱段配准问题是制约卫星数据规模化与产业化应用的重要因素之一.文章针对常见的同一光学系统多光谱成像模式,建立多谱段探测器配准误差模型,从空间相机设计角度考虑,仅考虑图像之间的位置关系,分别分析延时成像及非延时成像时造成谱段配准误差的因素,以及各因素对多谱段图像配准的影响.多谱段图像配准误差无延时成像时与各谱段像主点观测精度有关,延时成像时像主点位置观测精度和姿态指向精度影响较大,卫星速度观测精度影响较小.最后根据地面图像处理配准误差要求,仿真分析得出各引起配准误差因素的指标要求,可以为多光谱遥感器的设计和应用提供参考.

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