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距离“关门”只剩不到4小时 北斗卫星成功传回了信号 - 通信技术 - cnBeta.COM
source link: https://www.cnbeta.com/articles/tech/787207.htm
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距离国际电联规定的频率申请失效最后期限只剩不到4个小时。期盼已久的北斗导航卫星信号终于传回，等待的人群欢呼雀跃。中国是继美国、俄罗斯之后世界上第三个拥有自主卫星导航系统的国家。然而，这个建设过程却困难重重。
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