Earth’s Gravitational Field

Earth's Topographic Surface

Geoid Separation: + N

Geoid

Gravity potential

results in a

gravity field

Gravity vector depends on:

geodetic latitude,

geodetic longitude,

and H (or h)

•

P

H

h

Geoid Separation: - N

• h is the geodetic height

• H is the orthometric height

• N is the separation of the geoid

Ellipsoid

of Revolution

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