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Remote sensing is the field of integrating the information, technology, and analysis of data collected by both satellite and airborne sensor systems of the earth's surface, atmosphere, and near subsurface. Remote sensing could generally be described as the observation of objects or phenomena from afar, and is the opposite of in situ observation where those measuring are in direct contact with objects or phenomena. But since the 1950s, when the term was coined by Ms. Evelyn L. Pruitt of the U.S. Naval Office of Research, the term has come to mean more specifically the use of aerial photography and satellite imagery for monitoring the earth's surface (including atmosphere, and more recently, some substrate). The mechanism that acquires the information is referred to as a sensor, ...

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