高分七号卫星总体设计与技术创新

高分七号卫星(GF-7)是中国自主研制的首颗1∶1万比例尺立体测绘卫星, 是国家高分辨率对地观测系统重大专项的重要组成部分。卫星围绕“双线阵相机与激光测高仪主被动复合测绘”的新体制，形成了高精度内/外方位元素稳定性设计、高精度姿态稳定控制、首个X频段自适应高速率数据传输系统、星上智能星务管理系统等一系列关键技术和创新点，实现了少控制点或无控制点区域的大比例尺立体测绘能力。介绍了卫星的总体设计情况，总结了观测体制、高精度载荷、姿态控制、高速数传、智能星务等技术创新点，通过卫星在轨初步测试结果进行了评价，认为卫星能够满足1∶1万测绘任务的要求。

System design and key technolongies of the GF-7 satellite

GF-7 satellite is the first 1∶10000 scale stereoscopic surveying and mapping satellite independently developed in China, and an important part of the national high resolution earth observation system. The satellite is based on the active and passive combined surveying and mapping system of “two-line array surveying and mapping + laser altimetry” and forms a series of key technologies and innovation points, such as high precision internal/external element stability design, high precision attitude stability control, the first X-band adaptive high-rate data transmission system, and on board intelligent satellite management system. The capability of large scale stereoscopic mapping with little or no control points was realized. The system design of the satellite was described, and the technical innovation points were summarized such as observation system, high-precision load, attitude control, digital data transmission, intelligent satellite service, etc. The preliminary evaluation was carried out through the test results of satellites in orbit, and the satellites can meet the requirements of the 1∶10000 surveying and mapping mission.