Fig. 7
Top left: \(R_n(a)\) spectra (Lowes 1966) of CIY4 and LCS-1 and the differences between CIY4 and LCS-1 and between CIY4 and MF7 for \(a=6371.2\,\hbox {km}\). Top right: degree correlations \(\rho _n\) between CIY4 and LCS-1 and CIY4 and MF7. Bottom: matrices of normalized coefficient differences, S(n, m), of CIY4 with respect to LCS-1 and MF7. All plots are for SH degrees \(n=15{-}100\) at epoch 2015.0