Parameters of land reference points in the Gdynia region and the Free-air anomaly grid of the South Baltic

The data was registered during the campaign to verify the catalog value of the absolute point coordinates [point 5403 (POLREF-GORA DONAS)] of the national gravimetric control network. The data was recorded in two three-hour stationary measurement campaigns at the following points: Rozewie of the EUREF-POL network, Góra Donas POLREF, and mareograph points in the port of Gdynia and Gdańsk. The following receivers were used: Leica GS18 receiver was set up in Rozewie, the Leica GS15 on Góra Donas, the GS07 in Gdańsk and the GS18 in Gdynia. Moreover, the database contains archived data from ground base station systems (GBAS) available for the analyzed region. The systems are; Leica SmartNet and ASG-EUPOS. Other data included in the database are the gravimetric data of the free-air correction for the eastern part of the South Baltic Sea of the Polish Exclusive Economic Zone. The datasets allow you to estimate the consistency of values and make calculations of satellite data accuracy based on ground systems supporting the GNSS measurement data. Marine gravity measurements were recorded from the deck of ships. The linking of the land measurement campaign with the gravimetric measurement campaign shows mutual dependencies. It indicates the measurements preparation importance and the extent to which the assumed output values affect the practical use of the measurements results for the needs of ultra-precise inertial navigation.