Petras Petroškevičius, Eimuntas Paršeliūnas, Romuald Obuchovski, Dominykas Šlikas, Rosita Birvydienė, Raimundas Putrimas, Boleslovas Krikštaponis, Ričardas Kolosovskis, Arūnas Būga, Darius Popovas

The gravity survey and the gravimetric map of the territory of Lithuania

Abstract We presented a concept of a modern gravimetric-geodetic survey, the data processing and analysis of gravimetric observations and, ultimately, a new gravimetric map of the territory of Lithuania. In this connection, we outlined the applied algorithms for calculating free-air gravity anomalies and Bouguer anomalies, as well as assessed their accuracy and the accuracies of other parameters. The following accuracies were obtained: 0.021 mGal for uncertainties of gravity acceleration according to differences detected at control points, 0.025 m for coordinates, 0.015 m for ellipsoidal heights, 0.073 mGal for Bouguer anomalies, and 0.326 mGal for interpolated Bouguer anomalies. We further described the content of the gravimetric map. The map shows gravity measurement points together with their recorded value of Bouguer anomaly. Isoanomalies of gravity acceleration are drawn every 2 mGal. The scale of the map is 1:200,000. The printed version of the gravimetric map of the territory of Lithuania consists of 15 pages (50 × 50 cm).

Doi https://doi.org/10.5200/baltica.2022.1.6

Keywords gravity acceleration; gravimetric measurements; gravimetric network; gravity anomalies; gravimeter; calibration coefficients

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