Since the absolute gravity measurements in Croatia planned for 1999 were cancelled for known reasons, it was decided to cooperate with the team from EOST, University of Strasbourg, France. The first measurements, in Dubrovnik, were performed on August 26-29, 1999, with the absolute gravimeter FG5-206. The second campain, in Osijek, was planned for the end of November 1999, but the French team had a serious trouble with the instrument. Therefore, the measurements in Osijek are delayed for spring 2000. The results of the measurements in Dubrovnik are presented in this report, together with the measurements of vertical gravity gradient, locations of eccentric safety stations and determination of normal orthometric heights for all gravity points.
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In 1994, for the investigation of the present-day tectonics in the area of the Adriatic Sea a GPS network of 22 stations distributed over Croatia (17), Slovenia (3), and Italy (2) was established. In 1996, the network was extended towards the south and the west by 7 new stations. Three GPS campaigns in 1994, 1996, and 1998 were conducted within this network. Processing ofthe data from 1994 and 1996 was completed by the Bundesamt fur Kartographie und Geodasie in Frankfurt/Main using the Bernese GPS Software (Version 4.0). Based on an analytical surface deformation theory applied to the velocities derived within the CRODYN'94 and CRODYN'96 campaigns, the Adriatic Sea area indicates three different defermotion zones.
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