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In navigation satellite constellation system, the visibility relationship between satellites changes continuously because of the continual movement of satellite, which makes the link selection to be a big challenge. This study considers the navigation satellite constellation that has inter-ISL and intra-ISL, and takes satellite-link states into comprehensive consideration. Through the comparison of the shortest path scheme and K-shortest path scheme, a kind of ISL scheme with beam restriction for navigation constellation is proposed, and the simulation is done to show the effectiveness of supposed scheme. Finally this paper draws some useful conclusions.

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