Left panel: Location of the Sun on August 2, 2012, at 16:00 UT, as indicated by the bull's-eye. The colored points mark the positions of the radio sources. The dotted line marks the ecliptic. Middle panel: The synoptic map of the electron density is shown at 10.8 R_⊙ for CR 2126, as calculated by the MAS model. The curved lines represent the ray paths of the Faraday RM from four radio sources at 16:00 UT, projected onto their points of closest approach to the Sun. The bull's-eyes mark the closest approach points; the crossed circle indicates the position of Earth; and the square represents the projected location of the radio source. Right panel: Comparison of model-predicted and observed RMs. The dashed line represents perfect agreement. The product of the MHD MAS model's electron densities and magnetic field intensities was scaled by a factor of 1.15 to match the Faraday rotation observations performed on August 2, 2012.