Undulation Of The Geoid

Because geophysical heights

H

"above sea level" refer to the geoid, but GPS positioning provides in a direct geometric fashion heights

h

above the GRS80 Reference Ellipsoid , it has become a matter of great importance to determine accurate representations, or maps, of geoid undulations

N = h -H,\,

over the territories of nations, to allow the inexpensive GPS technology to be harnessed for the precise determination of heights.

REFERENCE

	CATEGORIES ABOUT UNDULATION OF THE GEOID

	geophysics

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