Correlations between B_SFA and parameters returned by the inversion schemes. Top panel: Pearson correlation coefficients, P, between B_SFA and the values returned by the S1 inversions for every pixel in Table 2. A value of 1 indicates perfect positive correlation (red), while a value of −1 indicates perfect negative correlation (blue). A value of 0 represents complete un-correlation. Bottom panel: same but for S2 inversions, where B_SIR was not included as a free parameter. The correlation between B_SFA and B_SIR is, therefore, undefined.