Vector magnetogram of the FOV and a zoom-in area of R1 obtained from GST/NIRIS after removing the 180° ambiguity in the transverse field. The blue and red contours indicate the magnetic field Bz at −2300G, −1700G, −900G, 50G, and 150G respectively. The vertical component of vector magnetic field Bz in grey scale is overlaid with arrows. The arrows indicate the strength and direction of the transverse magnetic field.