陆地探测四号01星总体设计与技术创新  

System design and key technologies of No.4 land exploration satellite 01

作　　者：张庆君[1] 倪崇 戴超[1] 刘立平[1] 唐治华[1] 舒卫平 ZHANG Qingjun;NI Chong;DAI Chao;LIU Liping;TANG Zhihua;SHU Weiping(Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院遥感卫星总体部,北京100094

出　　处：《中国空间科学技术(中英文)》2025年第1期1-11,共11页Chinese Space Science and Technology

基　　金：国家民用空间基础设施中长期发展规划(2015-2025)(发改高技[2015]2429号)。

摘　　要：为了解决低轨SAR卫星对观测区域成像幅宽小、重访时间长的问题,研制了陆地探测四号01星。其是世界首颗高轨SAR卫星,利用地球同步轨道的轨位优势,对同一地点的重访周期由低轨SAR的天级提升为小时级,幅宽由低轨SAR的百千米级提升为千千米级,可为及时、有效实施灾害应急响应提供有力支持。围绕高轨微波成像的新体制,解决了高轨微波成像、超大功率星载微波发射、超大口径星载天线、多体大挠性高精度姿态稳定控制、万瓦级强脉冲高品质电源、载荷与平台一体化高效热管理、高轨星地一体化精密定轨等一系列关键技术,实现了快重访、大幅宽、全天时、全天候的观测能力。通过分析在轨测试数据,卫星获取的高轨SAR图像纹理清晰,质量良好,可满足防灾减灾、国土资源勘查等领域使用需求。In order to solve the problem of small imaging width and long revisiting time of low orbit SAR,China developed the No.4 land exploration satellite 01,which is a scientific satellite in the medium and long term development plan of national civil space infrastructure(2015-2025),and is the world′s first geosynchronous SAR satellite.Using the advantages of the geosynchronous orbit,the revisiting time of the same place can be reduced from the day level of low orbit satellite to the hour level,and the width can be increased from the hundred-kilometer level of low orbit satellite to the thousand-kilometer level,which can provide strong support for the effective implementation of disaster emergency response.For the new system of geosynchronous SAR microwave imaging,a series of key technologies are developed,such as microwave imaging for geosynchronous SAR,ultra-large power space-borne microwave transmission,ultra-large aperture space-borne antenna,large-flexibility and high-precision attitude stability control,intense pulse high-quality large power supply,integrated efficient thermal management for payload and platform,and integrated satellite-ground high-precision orbit determination.The satellite has the capability of quick revisit,large width,all-day and all-weather observation.The overall design of the satellite is introduced,and the technical innovation is summarized.Through the evaluation of the preliminary test results for the satellite in orbit,the geosynchronous SAR images have clear texture and good quality,which can meet the requirements of disaster prevention and reduction,land resource exploration and other tasks.

关 键 词：陆地探测四号01星 高轨 合成孔径雷达 大功率 大口径 

分 类 号：V57[航空宇航科学与技术—航空宇航推进理论与工程]