Gravitational Acceleration

Gravitational acceleration (commonly denoted as g) is the acceleration experienced by a mass due to the Earth’s gravitational attraction. Its magnitude varies over the Earth’s surface due to differences in latitude, elevation, topography, and subsurface mass distribution.

In geodesy, gravitational acceleration is a fundamental observable for determining the Earth’s gravity field, geoid, and height systems. Measurements from terrestrial gravimeters, airborne surveys, and satellite gravimetry missions are used to model gravity variations, study mass redistribution processes (e.g., hydrology, cryosphere, solid Earth), and support precise positioning and reference frame realization.