Abstract

We present new techniques for measurements of magnetic fields in solar chromosphere - corona by observations its free-free microwave emission in intensity and polarization. We discuss the results of such measurements with Nobeyama imaging at ν =17 GHz and Beijing vector magnetograph for typical photospheric active region structures (isolated spots, plages, bipolar active regions). We discovered strong differences of photospheric and chromospheric field patterns and discuss possible explanations. These results may be useful for problems of 3D reconstruction of magnetic fields through its photospheric boundary values extrapolations.