engleski

Azimuth determination and analysis on the repeat stations network in Croatia

The continental part of the CGRSN (Croatian Geomagnetic Repeat Stations Network) network consisting of 8 repeat stations was established and surveyed in 2004. The network has reached its actual shape in 2008 after the setup of two additional repeat stations on the island of Lošinj and Palagruža. Due to the usage of different instrumentation and coordinate determination methodology during the network setup in 2004 and 2008, as well as due to the heterogeneity of the realization of the CSRS, within the survey in 2010 the CGRSN network was observed with GNSS (Global Navigation Satellite System) receivers Trimble R8 and Topcon Hyper PRO and coordinates were determined with GPPS (Geodetic Precision Positioning Service) service of the CROPOS (CROatian POsitiong System) system. The coordinate transformation based on the T7D model as well as the transformation using unique transformation parameters were carried out and subsequently the azimuth values were calculated from the obtained coordinates. The comprehensive analysis of the results was presented and the corrections for the transition of the azimuth values determined in heterogeneous realization of the national CSRS to the homogeneous and global ETRF2000 were given.

repeat stations network; declination; azimuth; GNSS; coordinates transformation

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