Abstract:
We present the preliminary results of the modeling of the three
dimensional structure of the magnetic field above the aclive regions observed
with Advanced Stokes polarimeter and Dick Dunn telescope at National Solar
Observatory, USA. The observed photospheric magnetograms are extrapolated
to chromospheric heights using the Fourier expansion technique to compute the
potential (current-free) magnetic field in Cartesian geometry. The photospheric
surface is assumed to be fiat, but the tilt of the boundary plane with respect
to the plane of the sky is taken into account, depending on the location of the
active region. The best fit of the observed and computed scatter plot is achieved
by considering the height of the chromospheric emission at 800 km.
