Region: SIO

                                     at66                  tt21             tt21/at66         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.06791     0.02752     0.06482     0.02623     0.95916     0.07762
                  Rrs_412     0.01342     0.00238     0.01343     0.00242     1.00132     0.04510
                  Rrs_443     0.01065     0.00173     0.01062     0.00158     0.99970     0.02852
                  Rrs_469     0.00877     0.00115     0.00910     0.00100     1.04088     0.04366
                  Rrs_488     0.00686     0.00067     0.00681     0.00058     0.99397     0.02140
                  Rrs_531     0.00242     0.00012     0.00240     0.00013     0.99041     0.03062
                  Rrs_547     0.00179     0.00010     0.00176     0.00012     0.98258     0.03978
                  Rrs_555     0.00146     0.00009     0.00146     0.00013     1.00200     0.06780
                  Rrs_645     0.00020     0.00005     0.00023     0.00007     1.17562     0.37436
                  Rrs_667     0.00017     0.00003     0.00014     0.00002     0.84903     0.06390
                  Rrs_678     0.00017     0.00003     0.00016     0.00003     0.93752     0.06516
                  aot_869     0.06887     0.01787     0.07131     0.01691     1.05452     0.16634
                 angstrom     0.78958     0.21215     0.68640     0.21817     0.86808     0.15983