A GEOMAGNETIC REFERENCE MODEL FOR ALBANIA, SOUTH-EAST ITALY AND THE IONIAN SEA FROM 1990 TO 2005 WITH PREDICTION TO 2008.

Abstract

From the three-component magnetic field observations taken from 1988 to 2005 during the measurement of Albanian and Italian magnetic repeat station network, as well as from a selected set of Ørsted satellite total field measurements, a geomagnetic reference model is determined for the region comprising the Albanian territory, the south-east part of the Italian Peninsula and the Ionian Sea. This model is designed to represent the components X,Y,Z and the total intensity F of the main geomagnetic field for epochs between 1990 and 2005 with prediction to 2008. The model is based on an expansion of the magnetic potential in terms of spherical cap harmonics applied to a cap of semi angle 8≅ . The model can be used as a reference model to reduce magnetic surveys undertaken in the area during the time of validity of the model, including also epochs up to 2008 for which the model is predictive.