Relative variance error 100*(Var(frc)/Var(obs)-1)
Relative peak error 100*(MeanPeak(frc)/MeanPeak(obs)-1), a) as is, b) unbiased
Miss rate, 20 cm tolerance. 100*(N_(|frc-obs|<20)/N_total), a) as is, b) unbiased
Peak miss rate, tolerance level= 0.1. 100*(N_(0.9<|frc/obs|<1.1)/N_total), a) as is, b) unbiased
Largest prediction error, a) as is, b) unbiased
