一种全球覆盖的多层星座链路分析

摘要

针对天基网络规模庞大、动态拓扑、链路较长的特点，提出了一种可以实现对地球全天时覆盖的多层星座组网模型，并分析了链路的通断情况。首先利用天文学卫星运动原理，结合卫星对地球覆盖的需求，提出了一种由5颗GEO卫星和9颗MEO卫星组成的多层星座网络模型；随后通过STK软件，对星座链路进行了分析，仿真结果证明了网络结构的可行性和稳定性。通过分析仿真结果，总结了卫星组网中需要考虑的影响因素，以期为建设符合我国国情的天空地一体化信息网络提供有益参考。%According to the characteristic of space network with large scale,dynamic topology and long link,in this pa-per,a multilayer constellation network model that can be achieved to cover earth all day time is presented. The con-nectivity of inter-satellite chain is also analyzed. Firstly, the principle of satellite movement in astronomy is combined with the requirement of satellite coverage. A multi-layer model constellation with five GEO and nine MEO satellites had been planned. What was more, using the STK software, the chain between satellites is analyzed . The results proved the feasibility and stability of network structure. By analyzing the simulation results, the factors that need to be considered in satellite network are summarized,that provide a useful reference for the construction of the integrated in-formation network according with our country’s condition.