新一代海洋水色卫星海岸带成像仪设计与验证  

Design and Verification of the Coastal Zone Imager on the New Generation Ocean Color Satellite

作　　者：张孝弘[1,2] 褚备 郑君[1,2] 李妥妥 高扬[1,2] 刘晓林 李可[1] 范建凯 曹伟 王牧卿 刘辉[1] 王磊 齐文雯[1] 徐彭梅 张可立[3] ZHANG Xiaohong;CHU Bei;ZHENG Jun;LI Tuotuo;GAO Yang;LIU Xiaolin;LI Ke;FAN Jiankai;CAO Wei;WANG Muqing;LIU Hui;WANG Lei;QI Wenwen;XU Pengmei;ZHANG Keli(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;Key Laboratory for Advance Optical Remote Sensing Technology of Beijing,Beijing 100094,China;DFH Satellite Co.Ltd.,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094 [3]航天东方红卫星有限公司,北京100094

出　　处：《航天返回与遥感》2025年第2期40-48,共9页Spacecraft Recovery & Remote Sensing

摘　　要：为满足对海岸带区域高分辨率、高信噪比、低杂光、大动态范围与高重访特性的观测需求,新一代海洋水色卫星创新性设计了兼具高空间分辨率、高信噪比和宽幅成像能力的海岸带成像仪,成像仪基于离轴三反主光学系统,采用成像镜头加高精度指向镜侧摆、多谱段集成TDICCD线阵探测器推扫的成像体制,实现了9个谱段在水体低辐亮度条件下的高信噪比和大动态范围成像。文章围绕成像仪的系统设计、关键技术突破及性能验证展开研究,在关键技术方面,详细论述了大口径高精度指向镜机构设计、高稳定性光机结构设计以及杂散光抑制设计等。通过实验室性能测试、外场性能测试和在轨性能测试验证了成像仪的成像品质和功能性能,结果表明:成像仪运行稳定,各工作模式功能正常,全色谱段和多光谱谱段的分辨率、图像信噪比、动态传函等各项性能指标均达到设计要求。研究成果为提升海岸带遥感观测能力、服务海洋资源开发和环境保护等提供了可靠数据支撑。To meet the user requirements for high resolution,high signal-to-noise ratio,wide dynamic range,and high revisit frequency in coastal zone observation,the coastal zone imager on the next-generation ocean color observation satellite employs an off-axis three-mirror main optical system and multi-spectral integrated high-sensitivity TDICCD detectors.This setup achieves high signal-to-noise ratio and wide dynamic range imaging across nine spectral bands under low water body radiance conditions,with a panchromatic spectral resolution of 5 meters and a multi-spectral resolution of 20 meters.The design of a large aperture pointing swing mirror,in combination with long-life mechanism design and high-precision closed-loop control,ensures the realization of high precision and reliability and the flexibility and maneuverability in orbit for the imager.The swath width,without the satellite side-to-side motion,reaches 1029 kilometers.Through ground testing and in-orbit operation verification,all performance indicators of the imager meet the design requirements and user needs.It has significant application prospects in enhancing coastal zone remote sensing observation capabilities,serving marine resource development and environmental protection.

关 键 词：海岸带成像仪 多光谱 遥感相机 信噪比 闭环控制 大口径指向摆镜 海洋水色卫星 

分 类 号：P237[天文地球—摄影测量与遥感] V443.5[天文地球—测绘科学与技术]