Orbit for geostationary satellites. If an artificial satellite is launched at an altitude of about 35,900 km above the equator and made to revolve in a circular orbit, its period will be 23 hours, 56 minutes, and 4 seconds, the same as the Earth's rotation period. If it revolves from west to east above the equator, it will appear to be stationary from the Earth's perspective. Therefore, satellites in geostationary orbit are important for communication and navigation. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
静止衛星をつくる軌道。人工衛星を赤道上の高度約3万 5900kmのところに打上げ,円軌道を回るようにすると,その周期は 23時間 56分4秒となり,地球の回転周期と同じになる。そこで赤道の上空を西から東に回るようにすれば,地上からは1点に静止しているようにみえる。したがって,静止軌道上の衛星は通信や航行のために重要である。
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