Region: AerMidway

                                     tt17                  tt18             tt18/tt17         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.09021     0.05586     0.07230     0.03701     0.85884     0.20068
                  Rrs_412     0.01052     0.00378     0.01157     0.00284     0.48905     7.15225
                  Rrs_443     0.00819     0.00210     0.00887     0.00174     1.11504     0.18901
                  Rrs_488     0.00567     0.00092     0.00604     0.00070     1.07870     0.10551
                  Rrs_531     0.00214     0.00025     0.00219     0.00021     1.02969     0.06468
                  Rrs_547     0.00158     0.00018     0.00159     0.00018     1.00439     0.04711
                  Rrs_667     0.00014     0.00004     0.00013     0.00004     0.92742     0.37699
                  Rrs_678     0.00014     0.00004     0.00015     0.00004     1.10420     0.26747
                  aot_869     0.09438     0.03735     0.09437     0.03735     0.99989     0.00776
                 angstrom     0.67183     0.31682     0.67590     0.31758     1.00842     0.01057
                     nflh     0.00354     0.00208     0.00549     0.00217     2.21127     2.37737