卫星通信链路连通性仿真模型设计

通信卫星在信息传输尤其是军事信息的传输中的作用日益突出。卫星通信链路的连通性分析与仿真是空间信息系统仿真中的主要内容之一，它包括物理可见性和电磁波的传输特性的分析与仿真。论文分析了航天器的空间位置计算模型，建立了通信卫星与航天器之间的物理可见性模型．通信卫星与地面节点之间的物理可见性模型以及空间电磁波的基本传输模型，并在计算机上进行了仿真实现，将仿真结果与STK计算的数据进行了对比，结果表明了模型具有较高的置信度。模型具有可移植性、扩展性、精确度高和简洁易用的特点。

Design of Connectivity Simulation Model of Satellite Communication Link

Communication Satellite plays more and more important role in the information transmission, especially in military information transmission. The analysis and simulation on connectivity of satellite communication links is one of the key parts in the simulation on space information systems, and it includes the physical visibility and transmission characteristics of electromagnetic wave. The space position computing model of spaceflight objects was analyzed, and the physical visibility model between communication satellite and other spacecrafts, and model between communication satellite and ground-based nodes were established, and the basic transmission model of space electromagnetic wave was analyzed. The models on the computer were implemented, and the results were contrasted with the data of STK, which indicate that this model is of high believability. The models are of transplantable, expansibility, high precision and easy-to-use.