International Gravity Formula

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Formula used to determine the gravitational acceleration at a given latitude (gϕ) for a model of the Earth that comprises a rotating, oblate spheroid. gϕ= g0(1 + α sin2 ϕ + β sin2 ϕ), where g0 is the value at the equator, of 978.0318 gals, and the constants α and β are 0.0053024 and -0.0000058.

Subjects: Earth Sciences and Geography.

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