Radial profile of the magnetic field strength B: results from this work (see inset) and comparison with the profile inferred from Faraday rotation measurements of radio sources occulted by the corona (r ≈ 5−14  R_⊙; green line). Different colors identify the results obtained in the quasi-perpendicular (blue area) and quasi-parallel (red area) cases using both HiRAS (r ≈ 1.8−2.2  R_⊙) and WIND (r ≈ 2.8  R_⊙) data. The power law of the form B(r) = 3.76  r^-2.29  G derived by Mancuso & Garzelli (2013; dotted line) nicely matches the two sets of data.