Marine Gravimetry and Its Improvements to Seafloor Topography Estimation in the Southwestern Coastal Area of the Baltic Sea

Marine gravimetry provides high-quality gravity measurements, particularly in coastal areas. After the update of new sensors GFZ’s air-marine gravimeter Chekan-AM, measurements showed a significant improvement from first campaign DENEB2017 with an accuracy 0.3/2=0.21 mGal @ 1 km along tracks, which is at highest level marine gravimetry. Then, these were used to assess data derived satellite altimetry (about 3 mGal) and finding that bias ?1.5 exists study area. Additionally, ship soundings existing seafloor topography models. We found SRTM model SIO 2 m, while regional EMODnet reaches lever sub-meters. Furthermore, 0.7 m jumps above 5 near coast Sweden. Finally, combined anomalies sounding are reveal fine structure ocean topography. Our estimated more accurate than digital elevation sets such as EMODnet, models and, furthermore, shows some detailed The well crucial for future geoid determination, 3D-navigation resource exploration Baltic Sea.