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Large-scale small satellite networks are playing an increasing important role in nowadays communication systems, due to its economic prospects and advantages in high bandwidth and low latency. Establishing a satellite network simulation platform for experimental verification of satellite networking and routing mechanisms can effectively reduce deployment costs. However, existing network simulators cannot support large-scale small satellite network simulations well because of the unbearable network simulation overhead or the lack of corresponding satellite simulation modules. In this paper, we introduce a lightweight, integrated large-scale small satellite network simulation platform. With a light simulation engine and abstract mode focused on the network layer, the developed simulation platform can effectively reduce the calculation overhead, increase the network simulation scale (more than 1000 satellite …