terms:latitude_correction
(1) A correction of gravity data because ol variation in centrifugal force resulting from the earth's rotation as the distance to the earth's axis varies with latitude q and for variation of the earth's radius because of polar flattening. The International Gravity Formula (1930) for such variation is
g = 978,049 (1 + 0.0052884 sin2q – 0.0000059 sin22q) mgal.
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The latitude correction amounts to 1.307 sin2q mgal/mile = 0.812 sin2q mgal/km.
(2) A gyrocompass correction for the rotation of the horizontal north vector is a function of latitude. (The horizontal north vector is tangent to the earth and hence the rotation is the result of the earth curvature.)
terms/latitude_correction.txt · Last modified: 2023/11/22 08:41 by 127.0.0.1