Abstract
<p>The status of the Croatian Geomagnetic Repeat Stations Network (CGRSN) and Croatian Geomagnetic Network for Field Mapping (CGNFM), completed in 2010, was described. Standard and new survey practices as well as reduction techniques were presented. The CGRSN data reduced in reference to the L'Aquila (AQU), Grocka (GCK) and Tihany (THY) observatories using weighted averages were given for the epoch 2008.5. Detailed pictures of Dalmatia's geomagnetic field of 2008.5 and the corresponding anomaly, obtained from the CGNFM data were shown.</p>
Highlights
Geomagnetic measurements on the Croatian territory started approximately 207 years ago; a short history can be found in Brkić et al [2003]
The normal field annual change was found close to the IGRF-11 annual change, their differences reconfirmed the need for continuation of the repeat stations surveys when highest accuracies are needed
In order to provide continuous observations, more reliable and independent reductions and models, establishment of a national observatory would be an essential step
Summary
Geomagnetic measurements on the Croatian territory started approximately 207 years ago; a short history can be found in Brkić et al [2003]. The aim of this paper was to present the Croatian Basic Geomagnetic Network (CBGN) upon completion in 2010, and to investigate the results of the third campaign carried out in 2008 – the geomagnetic field and anomalies of Dalmatia. 2. Croatian Geomagnetic Repeat Stations Network The Croatian Basic Geomagnetic Network (Figure 1). Consists of the Croatian Geomagnetic Repeat Stations Network (CGRSN) and Croatian Geomagnetic Network for Field Mapping (CGFNM); there is no national observatory present. The Croatian Geomagnetic Repeat Stations Network was established in 2004 [Brkić et al 2006], expanded in 2008, and reached its present form in 2009, when two repeat stations were destroyed and dislocated (Table 1 and Figure 1). The average distance between repeat stations was approximately 178 km
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