For the splitting functions of 0s(l)-0t(l+1) coupling pairs, the upper plots
show the correlation confidence level, in percent, for the lateral correlation of
the estimated splitting function and the predictions of Harvard model S12_WM13 and
Scripps model SH.10c.17.  A seperate line is shown for correlations at each (even)
structural degree.  Confidence levels for lateral correlations are discussed in the
paper "Correlations Between Global Features of Terrestrial Fields" [Mathematical
Geology, 16, 155-171, 1984], by D.H. Eckhardt.

     The lower two plots compare the root-mean-squared amplitudes of the estimated
splitting functions and model predictions at each structural degree.   This is done
using the function:  log(R); R=(estimated amplitude)/(predicted amplitude).