engleski

CGPS Stattion collocated at Split tide gauge

Split tide gauge is located in the town’ s port, on a small peer near Harbour-Master’ s building. The tide gauge benchmark PN-165 (TGBM) was installed on the Master’ s building, which had been erected on the bedrock near a city center. There is an auxiliary benchmark (R-1) on the tide gauge edifice. Historical precise levelling that took place during last 50 years did not show any significant changes in height between Harbour-Master’ s TGBM and tide-gauge auxiliary benchmark. The benchmark established on the concrete roof of the tide gauge during CROREF96-CRODYN96 GPS campaign was used to determine the height of Antenna Reference Point (ARP) above the national datum. An optimal choice for Split CGPS station was Ashtech Micro-Z CGRS receiver with Dorne-Margolin antenna. The station is powered by external power supply and equipped with GSM modem for communication with the instrument and downloading the data. CGPS station was installed on 4 May 2004 and daily files (station name SPLT) are available starting from 5 May 2004. RINEX files obtained from the instruments are compressed using Hatanaka compression software, version 2.4 and uploaded to the ESEAS-RI Data Server (European Sea Level Service). Preliminary analysis of the data showed that the observing site was well selected, and that the measurements will enable long-term analysis of the vertical land movements in this region. The problems which were encountered during different stages CGPS collocation are also going to be stressed and presented.

Sea level; tides; tide gauge

nije evidentirano