Geofizika, Vol. 41 No. 1, 2024.
Professional paper
https://doi.org/10.15233/gfz.2024.41.3
Results of the magnetometer inter-comparisons during the 2nd Cycle of Geomagnetic Information Renewal in the Republic of Croatia
Igor Mandić
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
*
Dino Curman
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Eugen Vujić
; University Hospital Centre Zagreb, University of Zagreb, Zagreb, Croatia
* Corresponding author.
Supplements: Mandic_Supporting_materials.pdf
Abstract
Between 2017 and 2021, the 2nd Geomagnetic Information Renewal Cycle was carried out on the Croatian Geomagnetic Repeat Stations Network (CGRSN). On several occasions, before and after the survey at CGRSN, the magnetometers used in the survey were tested at the Lonjsko Polje Geomagnetic Observatory (LON). This paper presents the methods and results of these tests. The results verified the correctness of the used magnetometers and confirmed that their absolute accuracy is within the targeted measurement accuracy at the secular point. Despite the favourable results, a detail analysis revealed the presence of a small magnetic offset. This offset was introduced during the comparison process and did not affect the CGRSN measurements results in any way. In this paper, we share our experience which could be instructive for other observers performing similar work. Further testing is needed to determine the exact direction and magnitude of this systematic offset.
Keywords
geomagnetic measurements; absolute instruments; repeat stations; geomagnetic observatory; instrument inter-comparison
Hrčak ID:
320435
URI
Publication date:
31.7.2024.
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