Subsatellite Point
Subsatellite point is the point on the Earth's surface directly below a satellite in orbit. It is also known as the nadir point. At this point, the satellite appears to be stationary in the sky. The subsatellite point changes continuously as the satellite moves in its orbit. The subsatellite point is an important concept in satellite communication and remote sensing as it helps in determining the coverage area of a satellite and the location on the Earth's surface where the satellite is pointing its sensors.
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