Abstract
<p>A recent stage of the magnetic surveying activities in the Czech Republic was started in the fifties by setting up a basic network of the first order. It consists of 199 points. Complete measurements of three components, D, H, and Z, were carried out in 1976-78 and 1994-96. Since 1970 six selected points have been revisited approximately every two years. Five of them are situated close to the Czech boundaries, the last one inland. The repeat station network was complemented by another inland station in 2003. The repeat station measurements, together with the data from neighboring observatories, were now used to reduce the data from the last magnetic survey to the epoch 2010.5 and new magnetic charts were drawn. The accuracy of the results and their comparison with IGRF model is also discussed.</p>
Highlights
The first magnetic survey on Czech territory was carried out by K
The International Geomagnetic Reference Field (IGRF) is in general not suitable for approximating a reference field on such small areas as the Czech Republic, it was shown [Hejda et al 1999] that the IGRF approximates the measured magnetic field on Czech territory surprisingly well
The fit obtained by the linear model based on repeat station measurements is one order more accurate and should be given priority
Summary
The first magnetic survey on Czech territory was carried out by K. Inclination and horizontal intensity at 24 sites (including the Prague Observatory) in Bohemia and derived magnetic maps for 1845 [Kreil and Fritsch 1846]. Measurements of the vertical and horizontal components were carried out in 1957-58 and supplemented by reduced values of declination obtained during a former campaign [Bouška et al 1960].
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