amplitude

amplitude

(1) The difference between the greatest value of a quantity and its average value. Distinguished from range, which is the difference between the greatest value and the least value.

(2) The angle, at an observer, measured in a horizontal plane from east or west to a celestial body. The term is used in this sense only for bodies whose centers are on the celestial horizon, and is prefixed with E if the body is rising and W if it is setting. It is given the prefix N or S to agree with the body's declination.

(3) Angular distance north or south of the prime vertical.

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Part of Speech: noun
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Industry/Domain: Earth science
Category: Mapping science
Company: American Congress on Surveying & Mapping
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