Region: SPG

                                     tt18                  tt19             tt19/tt18         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.02486     0.00868     0.02449     0.00856     0.98540     0.05475
                  Rrs_412     0.01840     0.00261     0.01839     0.00260     0.99930     0.00259
                  Rrs_443     0.01339     0.00156     0.01338     0.00155     0.99910     0.00269
                  Rrs_488     0.00745     0.00049     0.00744     0.00048     0.99900     0.00309
                  Rrs_531     0.00225     0.00009     0.00224     0.00009     0.99594     0.01176
                  Rrs_547     0.00160     0.00008     0.00159     0.00008     0.99422     0.01808
                  Rrs_667     0.00012     0.00002     0.00012     0.00002     0.97764     0.05743
                  Rrs_678     0.00014     0.00002     0.00013     0.00002     0.98820     0.03510
                  aot_869     0.08053     0.01921     0.08255     0.01999     1.02525     0.03795
                 angstrom     0.58467     0.22331     0.59406     0.22273     1.02028     0.05843
                     nflh     0.00438     0.00106     0.00447     0.00107     1.02222     0.05638