资源一号02D卫星可见近红外相机技术与验证

Design and Verification of Visible and Near-infrared Camera for ZY-1-02D Satellite

资源一号02D卫星主载荷可见近红外相机可以获取2.5m(全色)/10m(多光谱)地面像元分辨率影像、115km大幅宽地面景物,具有1个全色和8个多光谱谱段。为满足多谱段图像信息获取的需求,可见近红外相机从光学系统设计入手,通过采用双通道成像方式实现一台相机设置9个光谱谱段。研制过程中攻克了四色探测器的研制、双通道谱段间的配准、高集成电路设计、光机结构高稳定性设计等关键技术,有效地保证了相机的高性能指标。通过地面测试和在轨运行情况表明:相机设计合理,相机功能、性能满足研制要求,在轨图像品质优异。

As one of the most important optical payloads on the ZY-1-02D satellite,the visible and near-infrared camera has the ability to obtain panchromatic images with a 2.5m GSD and multispectral images with a 10m GSD,both with 115km swath width,providing panchromatic and 8-band multispectral images at the same time.To meet the requirement of obtaining multispectral images,the visible and near-infrared camera is specifically designed in its optical system,which enables to obtain images of 9 bands at the same time by using a dual-channel design.Several key technologies were solved during the developing process,such as research on four-color detectors,registration of dual-channel,design of integrated circuits and high stability design of optical-mechanical structure.The key technologies ensure the performance indexes of the camera.Ground testing and in-orbit operation status indicate that the camera design is rational,the function and performances of the camera completely meet the requirements and the in-orbit image quality is excellent.