Region: SPG

                                     tt21                  tt22             tt22/tt21         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.02885     0.01230     0.02930     0.01169     1.02197     0.03062
                  Rrs_412     0.01736     0.00409     0.01740     0.00415     1.00215     0.00290
                  Rrs_443     0.01281     0.00186     0.01283     0.00189     1.00160     0.00215
                  Rrs_469     0.01047     0.00032     0.01047     0.00032     1.00013     0.00007
                  Rrs_488     0.00730     0.00052     0.00731     0.00054     1.00163     0.00213
                  Rrs_531     0.00227     0.00003     0.00229     0.00001     1.00607     0.00827
                  Rrs_547     0.00162     0.00000     0.00163     0.00002     1.00850     0.01168
                  Rrs_555     0.00137     0.00003     0.00138     0.00004     1.00841     0.01134
                  Rrs_645     0.00019     0.00003     0.00019     0.00003     1.04063     0.05582
                  Rrs_667     0.00013     0.00002     0.00013     0.00002     1.01636     0.02031
                  Rrs_678     0.00014     0.00001     0.00014     0.00001     1.00901     0.01034
                  aot_869     0.09494     0.02727     0.09223     0.03088     0.96462     0.04811
                 angstrom     0.47458     0.21194     0.49849     0.24530     1.03853     0.05309