The orbit until a satellite is placed into its final desired orbit (satellite orbit). In order for a satellite to orbit the Earth semi-permanently, it must be transported to an altitude of at least 200 km and accelerated to a certain speed (for example, at an altitude of 200 km, at least 7.8 km/s); this process is called the launch orbit. It is during this launch stage that a rocket is needed; once the satellite is placed into orbit, it will automatically orbit the Earth. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
人工衛星を目的の最終軌道(衛星軌道orbit)に投入するまでの軌道。人工衛星として半永久的に地球を周回するためには,衛星をある程度以上(通常200km以上)の高度に運搬し,さらにある速度以上(例えば高度200kmであれば約7.8km/s以上)に加速しなければならないが,この過程が打上げ軌道である。ロケットが必要とされるのはこの打上げの段階であり,いったん衛星軌道に投入されれば衛星は自動的に地球を周回する。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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