Similar to Figure 7, but for six different frequency bands separately. Both α and β from Equation (8) are kept as free parameters in all cases. The bounds for x- and y-axes are kept fixed for comparison. The 1, 2, 3, and 6 cm data were taken from M. E. Shultz et al. (2022). The remaining two datasets are from this study. The blue dashed line represents the best-fit line from P. Leto et al. (2021), and the black solid line is the best-fit line from this work.