HMF2 is the altitude of the peak density of the
F2 layer.
NMF2 is the peak density of the F2 layer.
H1/2 is the scale height at the topside half density point.
AAPDT is the Average Absolute Percent Difference of the
topside shape
AAPDB is the Average Absolute Percent Difference of the
bottomside shape
Total Average is the total average skill score of the skill scores of all
five metrics.