新一代海洋水色水温扫描仪系统设计  

Design and Implementation of New Generation Ocean Color and Temperature Scanner System

作　　者：杨亭[1] 徐彭梅[1] 付智红[1] 段鹏飞[1] 李晟 胡斌[1] 王静怡[1] 张可立[2] YANG Ting;XU Pengmei;FU Zhihong;DUAN Pengfei;LI Sheng;HU Bin;WANG Jingyi;ZHANG Keli(Beijing Institute of Space Mechanics&Electricity,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]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49-62,共14页Spacecraft Recovery & Remote Sensing

摘　　要：海洋水色水温遥感器是监测海洋生态环境、评估海洋初级生产力、研究全球海温变化的重要手段。新一代海洋水色水温扫描仪针对传统海洋水色遥感器在空间分辨率、谱段设置、信噪比、定标精度等方面的不足,首次提出了望远镜整体旋转扫描-半角镜同步跟踪的系统设计方案。首先,创新性设计了旋转式离轴三反光学系统,结合整体旋转的扫描成像方式设计、大像元探测器设计,实现了系统空间分辨率≤500 m,刈幅宽度≥3000 km,信噪比≥1000,红外波段噪声等效温差≤0.1 K,偏振灵敏度≤1.5%,杂光系数≤1%。其次,针对星上多波段、高精度定标需求,基于望远镜整体旋转方式实现了多波段、全口径、全光路星上太阳定标,将载荷的太阳定标精度提升至2%以内。性能测试结果表明,系统多项指标优于国内外同类载荷,研究成果可为中国新一代海洋卫星水色水温仪提供技术支撑。The ocean color and temperature remote sensor is an important tool for monitoring the marine ecological environment,assessing primary productivity of the ocean,and studying global sea surface temperature changes.New generation ocean color and temperature scanner addresses the shortcomings of traditional ocean color remote sensors in terms of spatial resolution,spectral range setting,signal-to-noise ratio,and calibration accuracy.For the first time in China,a system design scheme for telescope overall rotation scanning and half angle mirror synchronous tracking is proposed.Firstly,an innovative rotating off-axis three mirror optical system was designed,combined with scanning imaging mode and a large pixel detector design,achieving system sweep width≥3000 km,signal-to-noise ratio≥1000,noise equivalent temperature difference of infrared band≤0.1 K,system polarization sensitivity≤1.5%,and stray light coefficient≤1%.Secondly,in response to the demand for multi band and high-precision calibration on board,a full aperture and full path onboard calibration technology based on a rotating telescope has been proposed,which improves the solar calibration accuracy of the payload to within 2%.The performance test results indicate that the system surpasses comparable load-bearing systems both domestically and internationally in multiple metrics,the research results can provide technical support for the new generation of ocean color and temperature scanner in China.

关 键 词：光机扫描 系统设计 海洋水色卫星 航天遥感 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]