For the empirical corrections, 𝑃22 is divided into three different scattering regions, which are the forward scattering, side scattering, and the back-scattering regions and four different parameter regimes, namely \(N<256\ \text{and}\ N\ge256\ \text{with}\ x_m\le0.6\ \text{and}\ xm>0.6\). A unique Legendre polynomial for the angular dependency of the deviation from the RDG approximation is fitted for each of the T-matrix runs (Equation 1).