高分辨率光学遥感卫星宽幅成像技术发展浅析

Study on the Development of Wide Swath Imaging Technology about Highresolution Optical Remote Sensing Satellites

幅宽是影响高分辨率光学遥感卫星应用的重要指标。本文分析了国际上高分辨率光学遥感卫星宽幅成像的主要途径,介绍了多CCD内视场拼接、多相机外视场拼接、敏捷成像、多星组网等主流宽幅成像方式及其数据处理的技术特点,同时分析了相机垂轨摆扫成像、大面阵相机敏捷拼幅成像等新型星载宽幅影像获取方式,有助于系统地了解高分辨率光学遥感卫星宽幅成像技术进展,对于展望其发展趋势具有一定的参考作用。

Swath width is one of the important factors influencing the application efficiency of high-resolution optical remote sensing satellites. This paper analyzes various approaches for wide swath imaging of high-resolution optical remote sensing satellites all over the world, among which characteristics of four mainstream wide swath imaging modes separately by inner Fo V stitching of multiple sensor lines, external Fo V stitching of multiple cameras, agile imaging and multi-satellite network are introduced, on the aspect of raw image data acquisition and process; also, this paper analyzes the other two novel wide swath imaging modes separately by whiskbroom scanning imaging of spaceborne sensors and agile splicing imaging of large-area array camera, which are potentially available according to the technological development. The research of this paper is helpful for a comprehensive acquaintance of wide swath imaging technologies for high-resolution optical satellites and also an outlook for the trend.