Distinguish between LEO system and GEO system.

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Orbital period 24 hours 10 to 40 minutes
Satellite height 35,800 km 500 to 1500 km
Propagation loss Highest least
Advantages Covers large geographical area, only three GEO satellites are needed to cover earth

LEO satellite provides better signal strength. It has least signal propagation delay since it is closest to earth.
Disadvantages Considerable time delay in the signal, which is not favorable for point to point communication.

Very costly, Atmospheric drag effects are more which cause gradual orbital disorientation
Orbital period 24 hours 10 to 40 minutes


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