Fig. 2.
Statistical distribution of the amplitudes (Ij)ℓ defined in Eq. (16) of the spherical harmonic components of Stokes I (black) and Stokes Q (red) at the unit optical depth for disc-centre line of sight of the Ca I 4227 Å line in a 3D snapshot model of the solar atmosphere (Carlsson et al. 2016) calculated using a very fine GT quadrature (20 × 20 points per octant).
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