Assessment of recent global geopotential models based on the Auvergne test area data

Abstract The gravitational field is important for many natural phenomena related to earth dynamics, especially mass transport. Its precise determination essential sciences such as geodesy, geophysics and oceanography. Determining the earth’s same determining potential. Since this potential a harmonic function outside earth, spherical series are often used represent gravity field. Global Geopotential Models (GGMs) sets of coefficients representing at different wavelengths. GGMs developed by scientists published International Centre Gravity Earth (ICGEM). When structure examined, it seen that they consist degrees various data groups. accuracy resolution provided each GGM vary depending on degree model developing GGM. Also, geodetic quantities potential, geoid undulation, deflection vertical components, gravity, anomaly values can be derived from within framework mathematical principles. In study, heights, free-air test points using produced in recent years have been investigated. study area contains 98000 chosen Auvergne France. Within scope undulations, values, anomalies all seven compared with ground-truth statistical results obtained.