“资源三号”高分辨率立体测绘卫星三线阵相机设计与验证

Design and Verification of Three-line Array Camera for ZY-3 High Resolution Stereo Mapping Satellite

2012年1月9日,中国第一颗民用高分辨率立体测绘卫星——"资源三号"卫星在太原卫星发射中心成功发射,星上装载的三线阵相机可以获取2.1m地面像元分辨率(正视相机)和3.5m地面像元分辨率(前/后视相机)全色影像。文章介绍了三线阵相机的组成及工作原理、关键技术及实现情况、在轨运行和测试情况,给出了在轨测试的初步结果。在轨运行情况表明:相机设计合理,成像品质优异,各项指标满足1∶50 000制图应用的要求,实现了内方位元素的高精度稳定,对卫星定位精度达到国际先进水平发挥了关键作用。

On January 9,2012,ZY-3 satellite,the first civil high resolution stereo mapping satellite of China,was successfully launched at the Taiyuan satellite-launching center.As one of the most important optical payloads on the satellite,the three-line array camera has ability to obtain panchromatic images with 2.1m GSD by orthometric camera and 3.5m GSD by forward/backward cameras.This paper introduces the three-line array camera from the aspects of composition and operating principle,critical techniques and their implementation,and in-orbit operation and tests.The preliminary in-orbit test results are also given in the paper.The in-orbit operation status indicates that the camera design is rational and image quality is excellent,and each qualification meets the requirements of 1∶50 000 mapping application.The interior orientation elements of the camera have proved high-accuracy stable,which plays a key role in improving the satellite positioning precision to the international advanced levels.