Evaluation of satellite-network is becoming an important issue in development of satellite network, and characteristics of satellite-network topology will have great effect on the system capacity. However, the study on effect of topologic characteristics is still lacked. It emphasizes on security capacity of satellite networks. The key elements are described. By simulation analyzing, it shows the relationship between topologic characteristics and anti-destruction as an example. It can provide solid basis for research in the area of satellite network topologic characteristics and index system.
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