【摘要】 从跟踪策略和通信链路建立角度出发,利用中继卫星(TDRS)和用户星的空间几何关系,充分考虑用户星体和地球遮挡因素,推导出基于卫星经典轨道根数和姿态的TDRS与用户星的双向跟踪规律以及TDRS对用户星覆盖率计算公式.同时为了克服星体遮挡,提出用户星天线安装在星体对天面桅杆上的最佳安装策略,确定了桅杆高度与星体长度的关系,它们是TDRS和用户星跟踪部件设计和业务测控的基础.更多还原

【Abstract】 From the viewpoint of tracking strategies and link establishment,this paper studies the space geometrical relationship between a TDRS and user satellites in detail.Taking into account of the occultation caused by the Earth and the body of a satellite,the bidirectional tracking rules for a TDRS and user satellites are investigated based on classical orbital elements and the satellite’s attitude.The coverage of a TDRS over a user satellite with different orbital altitudes is calculated and simulated.In order to overcome the occultation caused by the body of a user satellite,a way to fix the antenna to a mast which extrudes above the side towards space of a user satellite is presented.With an appropriate height of the mast,the occultation can be eliminated.All these formulas and strategies are the key elements for TT&C and applications of China’s future TDRS.更多还原