Example of disagreement in orientation of B_θ and B_φ Magnetic field vector components of an active region in the southern hemisphere, which passed the central meridian on 19 November 2015. Upper panels show radial (B_r), meridional (B_θ) and zonal (B_φ) field from SDO/HMI and lower panels from SOLIS/VSM. Meridional (middle) and zonal (right) components depict opposite orientation. Red/blue represent positive/negative polarities scaled between ±50 G (see color bars on the right side of figure).