Undulation of the geoid — is a somewhat old fashioned name for the separation N between the geoid and the reference ellipsoid of the Earth.Because geophysical heights H above sea level refer to the geoid, but GPS positioning provides in a direct geometric fashion heights… … Wikipedia
Undulation — may refer to:* Lateral undulation, the most primitive of vertebrate locomotor patterns * Law of Undulation, an invention of C. S. Lewis * Undulation of the geoid, the separation between the geoid and the reference ellipsoid of the Earth … Wikipedia
geoid — geoidal, adj. /jee oyd/, n. 1. an imaginary surface that coincides with mean sea level in the ocean and its extension through the continents. 2. the geometric figure formed by this surface, an ellipsoid flattened at the poles. [1880 85; < Gk… … Universalium
Geoidundulation — Geoid|undulation, Geoidhöhe, senkrechter Abstand zwischen dem Erdellipsoid (Erde) und dem Geoid. Die mittlere Abweichung zwischen dem Erdellipsoid und dem Geoid beträgt ± 30 m, extreme Werte werden südlich Indien ( 110 m) und bei Neuguinea (+… … Universal-Lexikon
Vertical deflection — The vertical deflection (deflection of the plumb line, astro geodetic deflection) at a point on the earth is a measure of how far the direction of the local gravity field has been shifted by local anomalies such as nearby mountains. (Here gravity … Wikipedia
Geodesy — (pronEng|dʒiːˈɒdɪsi [OED] ), also called geodetics, a branch of earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three dimensional time varying… … Wikipedia
Erdgestalt — Als Erdfigur (oder auch Erdgestalt) wird eine mathematisch möglichst einfach definierbare Annäherung an die Form der Erde bezeichnet. Eine solche Bezugsfläche wird in vielen Bereichen der Geowissenschaften für Berechnungen und für… … Deutsch Wikipedia
Physical geodesy — [ NOAA)] Physical geodesy is the study of the physical properties of the gravity field of the Earth, the geopotential, with a view to their application in geodesy.Measurement procedureTraditional geodetic instruments such as theodolites rely on… … Wikipedia
Outline of geophysics — Seismic velocities and boundaries in the interior of the Earth sampled by seismic waves. The following outline is provided as an overview of and topical guide to geophysics: Geophysics – the physics of the Earth and its environment in space; also … Wikipedia
