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  1. (西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-20 发布日期:2007-02-25

On the tracking strategies and space geometrical relationship between a TDRS and user satellites

LI Yu-heng;SUN En-chang;YI Ke-chu

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-02-20 Published:2007-02-25

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.

关键词: 中继卫星, 用户星, 覆盖计算, 天线安装

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.

Key words: TDRS, use satellite, coverage, antenna installation


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