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自1982年樱花2号(CS-2)通信卫星发射以来,原日本国铁将它作为事故、灾害及大规模地震等信息的紧急用回线。随后1989年2月又发射了性能更佳的樱花3号(CS-3)通信卫星,由于卫星寿命的延长和可靠性的提高以及运用时限的扩大,其利用范围也扩大了。利用通信卫星的地面局配置有仙台、新泻、东京、静罔等固定地面局和三浦半岛的地震检测地面局,另外还配置了静罔移动车载局。其
Since the launch of the CS-2 communications satellite in 1982, the former Japan National Railways has used it as an emergency callback for information on accidents, disasters and large-scale earthquakes. Subsequently, the better-performing Sakhalin-3 (S-3) communications satellite was launched in February 1989 and its use has also been expanded due to the longer life expectancy and increased reliability of the satellites, as well as the expanded time frame for their use. The ground station using communications satellites is equipped with the Seismic Detection Ground Station of Sendai, Niigata, Tokyo, Miura and other fixed ground stations and the Miura Peninsula, as well as the static car-free station. its