Regional Gravity Model of Greece Based on Satellite, Marine and Terrestrial Data

Abstract

Greece is a country structured by land, several islands and sea. A regional gravity model of such a country demands the involvement of several types of gravity data in order to cover all its territory. In this paper, we present the development of a regional combined gravity model of Greece and its surrounding area, by integrating terrestrial, marine (shipborne and altimetry-derived gravity data) and satellite data (GOCE and GRACE data). These kinds of data, especially the terrestrial and marine ones, have passed quality and validation control since they were collected from different organizations, which means that they probably have been acquired and processed with different parameters and formulas. Following that, their integration was accomplished with the application of the least-squares collocation (LSC). Therefore, a newly combined regional gravity model of Greece and its surrounding areas has been developed. This gravity model can be valuable for regional geological and geophysical studies of Greece, since it provides homogeneously the distribution of Complete Bouguer anomaly (CBA) all over Greece, with updated gravity data and in good agreement with the initial gravity datasets that have been used.

Application of High-Resolution Aeromagnetic and Gamma-ray Spectrometry Surveys for Litho-Structural Mapping in Southwest China

“…We primarily utilized the software Oasis Montaj [23,24] (Geosoft Inc., Toronto, ON, Canada) to process the airborne geophysical data, as it is well-suited for handling and the aeromagnetic data ranged from 16.71 to 15.87 pT, while the static noise of the magnetic diurnal variation ranged from 0.97 to 3.81 pT. The resolution of the airborne gamma-ray spectrometry, using a NaI crystal (137Cs), ranged from 7.7% to 11.2%.…”

“…We primarily utilized the software Oasis Montaj [23,24] (Geosoft Inc., Toronto, ON, Canada) to process the airborne geophysical data, as it is well-suited for handling and…”

“…We primarily utilized the software Oasis Montaj [23,24] (Geosoft Inc., Toronto, ON, Canada) to process the airborne geophysical data, as it is well-suited for handling and visualizing extensive geophysical datasets. Preprocessing was performed on the raw data obtained from aeromagnetic and gamma-ray spectrometry surveys, which involved standard leveling and necessary corrections, such as airplane background correction, cos-mic rays background correction, Compton scattering correction, air radon background correction, and height correction.…”