📅  最后修改于: 2021-01-07 05:31:50             🧑  作者: Mango
从通信的角度看,卫星系统的发展历史悠久。下面以表格形式显示了一些重要事件:
Year | Description |
---|---|
1945 | Arthur C. Clarke publishes an essay titled “Extra Terrestrial Relays” |
1957 | First satellite, SPUTNIK |
1960 | First Reflecting communication satellite, ECHO |
1963 | First Geostationary satellite, SYNCOM |
1965 | First Commercial geostationary satellite, “Early Bird” (INTEKSAT I): 240 duplex telephone channels or 1 TV channel, 1.5 year lifetime. |
1976 | Three MARISAT satellites for maritime communication. |
1982 | First mobile satellite telephone system, INMARSAT – A |
1988 | First satellite system for mobile phones and data communication, INMARSAT -C |
1993 | First digital satellite telephone system |
1998 | Global satellite systems for small mobile phones. |