高分三号卫星图像质量指标设计与验证  

Design and Verification of Image Quality Indexes of GF-3 Satellite

作　　者：赵良波 李延[1] 张庆君[1] 刘杰[1] 袁新哲[2] 陈琦[3] 

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]国家卫星海洋应用中心,北京100081 [3]中国资源卫星应用中心,北京100094

出　　处：《航天器工程》2017年第6期18-23,共6页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：图像质量指标是衡量合成孔径雷达(SAR)卫星成像能力及定量化应用水平的重要指标。在进行高分三号(GF-3)卫星总体设计时,根据海洋、减灾、水利、气象等应用领域的需求,提出了能够兼顾各行业用户典型应用及定量化反演的图像性能要求,确定了几何质量指标和辐射质量指标2类共13项图像质量指标,分析了卫星平台、SAR载荷、空间传输、地面定标及处理等各项因素对图像质量指标的影响,总结了通过卫星总体设计保证各项图像质量指标的方法及手段。GF-3卫星的在轨测试及业务化运行,验证了图像质量指标的符合性,可为后续SAR卫星的研制提供设计参考。SAR（synthetic aperture radar）image quality is a series of important parameters to char-acterize the radar imaging and quantitative application ability of SAR satellites.In the system de-sign of GF-3 satellite,according to the ocean application,disaster mitigation,water conservancy, meteorology and others,the image performance requirements are presented to meet the require-ments of different users in typical application and quantitative analysis,and the geometric quality and radiation quality of 2 categories and 13 image quality parameters are determined.The influ-ences of the satellite platform,SAR payload,signal transmission,ground calibration and image processing on image quality are determined,as well as the methods to ensure the image quality parameters through satellite system design are summarized.The conformity of the image quality parameters are verified by the test and operation on orbit,which provides references in design for the subsequent SAR satellites.

关 键 词：高分三号卫星 合成孔径雷达 图像质量指标 几何质量 辐射质量 分块自适应量化 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计]