Region: global

                                     tt18                  tt19             tt19/tt18         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.26064     0.03488     0.25879     0.03462     0.99292     0.01224
                  Rrs_412     0.00981     0.00053     0.00981     0.00053     0.99971     0.00173
                  Rrs_443     0.00780     0.00032     0.00780     0.00032     0.99957     0.00157
                  Rrs_488     0.00570     0.00016     0.00570     0.00016     0.99953     0.00111
                  Rrs_531     0.00253     0.00006     0.00252     0.00006     0.99754     0.00462
                  Rrs_547     0.00194     0.00005     0.00193     0.00005     0.99650     0.00706
                  Rrs_667     0.00020     0.00002     0.00020     0.00002     0.99008     0.01611
                  Rrs_678     0.00023     0.00002     0.00023     0.00002     0.99525     0.00933
                  aot_869     0.08752     0.00389     0.08904     0.00381     1.01750     0.01264
                 angstrom     0.73198     0.05244     0.73547     0.05337     1.00475     0.01102
                     nflh     0.00780     0.00078     0.00788     0.00078     1.01085     0.01260