Power spectral density of (a) V_sc and (b) B (MAG—grey, SCM—blue). The least-squares fits (vertically shifted for clarity) and the break frequency (f_b) using Equation (1) are shown by the black dashed lines and the diamond marker, respectively. Thin grey dashed lines indicate the flat analog-to-digital converter and the frequency dependent SCM noise floors. (c) V_sc and B spectra compensated by the sub-ion range scaling ﹩({f}^{-{\alpha }_{1}}P(f))﹩. The compensated spectra shown are faded for SNR ≲2.