Transcription of PRINCIPLES OF REMOTE SENSING
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PRINCIPLES OF REMOTE SENSING
PRINCIPLES OF REMOTE SENSINGS hefali AggarwalPhotogrammetry and REMOTE SENSING DivisionIndian Institute of REMOTE SENSING , Dehra DunAbstract : REMOTE SENSING is a technique to observe the earth surface or theatmosphere from out of space using satellites (space borne) or from the air usingaircrafts (airborne). REMOTE SENSING uses a part or several parts of theelectromagnetic spectrum. It records the electromagnetic energy reflected or emittedby the earth s surface. The amount of radiation from an object (called radiance) isinfluenced by both the properties of the object and the radiation hitting the object(irradiance). The human eyes register the solar light reflected by these objects andour brains interpret the colours, the grey tones and intensity variations.
microwave region is the measure of relative return from the earth’s surface, ... very high spatial resolution sensor system. ... SPECTRUM EMR is a dynamic form of energy that propagates as wave motion at a velocity of c = 3 x 1010 cm/sec. The parameters that characterize a wave motion are wavelength (λ), frequency (ν) and velocity (c) (Fig ...
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