A gravity zone is defined by the boundaries for both the geographical latitude ϕ (boundary values ϕ1 and ϕ2) and the altitude above sea level.The boundary values shall be chosen as integer multiples of 1° (exceptionally 0,5° is also allowed) and 100 m, respectively.

Location of test

Height in meters above sea level:

Latitude in °:

Gravitational acceleration = - ms²

Target location

Height in meters above sea level:

Latitude in °:

Gravitational acceleration = - ms²

This is the formula being used (from the WELMEC Directive 90/384/EEC)

 

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