'Data gathering by remote sensing' may sound highly technical and even very esoteric, but like Monsieur Jourdain, the character from Molière's Bourgeois gentilhomme, who did not realize that he had been speaking prose for over forty years, all of us, except those who are unsighted, have been doing it all our lives. Remote sensing is simply the collection of information from a distance1 about an object or an area without any direct physical contact. As has been pointed out, '[t]he most obvious example of a remote sensor and closest to man is his eyes. The eyes...
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