Repeat station measurements and observatory work in Austria 2009 – 2010

Paper type: 
Oral presentation

Repeat station measurements and observatory work in Austria 2009 – 2010

J. Berger, G. Duma, B. Leichter, R. Leonhardt

Central Institute for Meteorology and Geodynamics

Hohe Warte 38, A 1190 Vienna, Austria

barbara.leichter@zamg.ac.at

In 2009 and 2010, magnetic surveys have been performed to measure the 14 repeat stations in Austria, respectively. This repeat station network was established in the late 1990s.

The observatory data of Wien-Cobenzl (WIK) serves for reduction purposes. From 2008 on, a digital suspended dIdD system from GEM has been providing the reference values. Recently, another digital magnetometer, type LEMI, was installed. It is briefly reported on the operation of these two instruments.

A software was developed (Wolfram Mathematica / Python Programming) for the baseline determination of the two digital instruments from absolute measurements. The baseline is calculated by a Cubic Spline approximation using the full vector modulation. After revision, the repeat station data 2009 and 2010 will be forwarded to the WDC Edinburgh, in the MagNetE format.

The recent survey data are used to compute the present magnetic field in Austria and to update the geomagnetic maps. Frequently, the Austrian Geomagnetic Service is asked to provide magnetic declination data and maps for navigation purposes. The recent trend of secular variation of D is presented.

In 2010, the construction of a new geomagnetic observatory has started, at a site next to the modern Conrad observatory in Austria’s mountains. Magnetic recording will take place in underground tunnels, by reasons of temperature stability. It is reported on the current construction progress.

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