针对高度动态变化的卫星网络，提出一种基于动态拓扑图的可视化方法。动态拓扑图可视化的难点在于如何保持动态可视化过程中的稳定性，从而使用户容易地感知到网络中所发生的拓扑变化。根据卫星网络的动态变化特点，构建连续的动态拓扑图模型；设计一种保持布局稳定性的策略，并基于力引导思想提出一种动态拓扑图布局算法；以Iridium系统为典型实例，验证本文的可视化方法的合理性和可行性。实验表明，该方法能够以清晰的可视化图像支持用户对卫星网络动态拓扑的感知和理解。%A visualization method based on dynamic topological graph specific to satellite networks changing over time is proposed.The challenge of dynamical topological graph visualization lies in how to preserve the dynamic stability during visualization process and facilitate the perception of dynamic change of networks for users.Firstly,a continuous dynamical topological graph model was built,based on the analysis of dynamic characteristic of satellite networks.Then,a strategy for preserving dynamic stability of layout was designed and a dynamical topological graph layout algorithm was proposed,based on force-directed.Finally,the Iridium system was taken as a representative instance and the rationality and feasibility of our approach was validated.The experiment illustrated that the visualization results of our approach effectively supports the perception and understanding of dynamic topological of satellite networks.
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