面向智能应用的轻小型Ku波段SAR卫星

Light miniaturized Ku-band SAR satellite for intelligent application

面向“天基互联网+”信息服务和全天时全天候遥感成像应用需求,在继承和发展现代微小卫星的设计理念的基础上,研制国内首颗轻小化Ku波段SAR卫星。SAR载荷通过载荷舱与平台进行机械连接,二者独立研制与集成。SAR载荷采用“轻型抛物面天线+高功率行波管发射机”方案,雷达波束控制通过卫星机动侧摆实现,采用脉冲体制,工作在Ku波段。卫星除了微波成像功能,兼具星间通信,在轨任务规划、路由和数据处理能力。卫星发射入轨后,在轨运行良好,成像性能稳定,已在应急处理、灾害救援方面发挥了巨大作用。卫星具备低成本、集成化、智能化、网络化等特点,可为未来建成具有开放互连、自适应组网接入、低功耗小型化的微小卫星星座系统提供解决方案。

In order to meet the requirements of“space-based Internet+”information services and all-time and all-weather remote sensing imaging applications,the first light and small Ku-band SAR(synthetic aperture radar)satellite in china is developed on the basis of inhering and developing the design concept of modern microsatellites.The SAR payload is mechanically connected with the platform through the load cabin,and both of them are independently developed and integrated.The scheme of"light paraboloid antenna+high-power TWT transmitter is adopted for the SAR payload.The radar beam control is realized by maneuvering the satellite side-swing.It can adopt the pulse system and operate it in Ku band.In addition to the microwave imaging function,the satellite has the capabilities of intersatellite communication,in-orbit mission planning,routing and data processing.After launched into orbit,the satellite can operate well in orbit and has stable imaging performance.It has played a great role in emergency response and disaster relief.The satellite has the characteristics of low cost,integration,intelligentization and networking,which can provide a solution for building a microsatellite constellation system with open interconnection,adaptive networking access and low-power miniaturization in the future.