5 and 6 and Table 2 show the results of using the reflectance ratio and the three-band models,
respectively, for the WO, ST-10, and ST-30 data sets. The largest R2
(0.982) (smallest LOO RMSE = 13.4 μg/L) was observed for the
three-band model when the ST-10 data was used (Fig. 6(b)).