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The term "remote sensing" refers to the techniques of measurement and interpretation of phenomena from a dis- tance. Prior to the mid-1960's the interpretation of film images was the primary means for remote sensing of the (5) Earth's geologic features. With the development of the optomechanical scanner, scientists began to construct digital multispectral images using data beyond the sensitivity range of visible light photography. These images are constructed by mechanically aligning pictorial representations of such (10)phenomena as the reflection of light waves outside the vis- ible spectrum, the refraction of radio waves, and the daily changes in temperature in areas on the Earth's surface. Digital multispectral imaging has now become the basic tool in geologic remote sensing from satellites.
Approximate Word count = 471
Approximate Pages = 1.9
(250 words per page double spaced)
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