“高分七号”卫星双线阵相机的设计及实现

Design and Implementation of the Dual Line Array Camera for GF-7 Satellite

2019年11月3日,中国第二代民用高分辨率立体测绘"高分七号"卫星在太原卫星发射中心成功发射,星上装载的双线阵相机可以获取0.65m/2.6m地面像元分辨率的后视相机全色/多光谱影像和0.8m地面像元分辨率的前视相机全色影像。文章介绍了卫星的重要光学载荷--双线阵相机的组成、工作原理、关键技术及实现、试验验证等,地面测试和试验验证结果表明相机设计合理,成像品质优异,各项指标满足1︰10000制图应用的要求,对卫星满足定位精度发挥了关键作用。

On November 3,2019,GF-7 satellite,the 2nd generation civilian high resolution stereo mapping satellite in China,was successfully launched at the Taiyuan satellite launching center.As one of the most important optical payloads on the satellite,the dual line array camera has the ability to obtain panchromatic images with 0.65 m/2.6 m GSD for the backward camera and 0.8 m GSD for the forward cameras.This paper introduces the dual line array camera including its composition,the operating principle,critical techniques with corresponding implementation and test verification.The ground test and on-orbit experiment results show that the camera design is rational and the image quality is excellent,meeting the requirements of 1:10000 mapping application,and playing a key role on improving the satellite positioning precision.