摘要
从低轨卫星的自主实时定轨的应用需求出发,详细描述了低轨卫星自主实时定轨的概念,并利用模块化思想将自主实时定轨分解成可实现的多个独立模块。在GNSS星载接收机平台上详细设计了硬件流程和硬件时序,确保了满足自主定轨的实时性要求。最后,在天象一号的GNSS星载接收机上完成了硬件实现和在轨测试,并利用实际飞行数据进行了各项指标评估。评估结果表明利用GNSS星载接收机可以满足实时定轨优于1 m的精度要求,可解决基于低轨通信星座的高精度时空基准建立和维持问题。
Based on the application requirement of autonomous real-time orbit determination for low-orbit satellite,the concept of autonomous real-time orbit determination of low-orbit satellites is described in detail.Autonomous real-time orbit determination is decomposed into several independent modules that can be realized by using modular approach.Hardware processes and hardware timing are designed in detail on the GNSS on-board receiver platform to ensure that the real-time requirements of autonomous orbit determination are met.Finally,the hardware implementation and in-orbit test were completed on the GNSS onboard receiver of Tianxiang-1,and the indicators were evaluated using the actual flight data.Evaluation results show that GNSS on-board receiver can meet the accuracy requirement of orbit determination better than 1 meter,and can solve the problem of high-precision space-time benchmark establishment and maintenance based on low-orbit communication constellation.
作者
伍蔡伦
孙腾达
谢松
WU Cailun;SUN Tengda;XIE Song(The 54th Research Institute of CETC,Shijiazhuang 050081,China;The State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)
出处
《无线电通信技术》
2020年第5期541-545,共5页
Radio Communications Technology
基金
中国第二代卫星导航系统重大专项项目(GFZX03010105280301)。
