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We analyze spectropolarimetric observations of the chromospheric Ca II 8542line taken by the Interferometric Bidimensional Spectrometer (IBIS) at the DunnSolar Telescope and photospheric Fe I 6302 lines obtained with the SolarOptical Telescope (SOT) of Spectro-polarimeter (SP) on board the Hinodesatellite. The data were obtained on 2012 January 29 targeting NOAA activeregion (AR) 11408 and AR 11410. By using the center-of-gravity (COG) method wecompute the line-of-sight (LOS) field strength for observed lines of Fe I6301.5/6302.5 with SP spacecraft at every places in the active region. Also, weconstruct a COG map for the chromospheric IBIS data of Ca II 8542 line incomparison with COG maps derived from the SP of field strength. We found thephotospheric field strength ranges up to 2 kG in plages and up to 2 kG orhigher values inside the umbral region. In the case of chromospheric fieldstrength, the LOS field inside the umbral region increases up to 800 G, and thefield strength decreases toward the edges of sunspot.

The chromospheric magnetic field in active regions derived from spectropolarimetry of Ca II 8542