Region: SPG

                                         vt15                    vt21                   vt21/vt15
                     Prod       mean       stdev        mean       stdev        mean       stdev         R^2        mapd
                  chlor_a     0.02458     0.01164     0.02628     0.01275     1.06121     0.08489     0.97695     5.03556
                  Rrs_410     0.01686     0.00353     0.01708     0.00338     1.01566     0.01581     0.99801     1.33198
                  Rrs_443     0.01257     0.00211     0.01266     0.00204     1.00847     0.00854     0.99913     0.79975
                  Rrs_486     0.00739     0.00078     0.00743     0.00075     1.00721     0.00764     0.99796     0.84075
                  Rrs_551     0.00143     0.00011     0.00147     0.00008     1.02956     0.03610     0.85838     2.56488
                  Rrs_671     0.00012     0.00002     0.00013     0.00002     1.02647     0.02947     0.96994     3.49205
                  aot_862     0.07825     0.01751     0.07848     0.01743     1.00325     0.00366     0.99983     0.16707
                 angstrom     0.68055     0.19996     0.66926     0.20272     0.98160     0.02362     0.99482     1.85672
                  epsilon     1.04703     0.02169     1.04520     0.02182     0.99825     0.00205     0.99023     0.12344