Region: SPG

                                         vt21                    vt23                   vt23/vt21
                     Prod       mean       stdev        mean       stdev        mean       stdev         R^2        mapd
                  chlor_a     0.02309     0.01237     0.02473     0.01323     1.07337     0.04891     0.99561     7.39235
                  Rrs_410     0.01778     0.00319     0.01727     0.00317     0.97100     0.01958     0.98854     2.66330
                  Rrs_443     0.01312     0.00197     0.01274     0.00196     0.96998     0.01537     0.98980     2.91655
                  Rrs_486     0.00756     0.00070     0.00737     0.00072     0.97502     0.01074     0.98866     2.82154
                  Rrs_551     0.00146     0.00008     0.00145     0.00009     0.99261     0.01860     0.90622     1.76523
                  Rrs_671     0.00013     0.00002     0.00013     0.00002     0.99087     0.04679     0.91244     4.53608
                  aot_862     0.07913     0.01795     0.07883     0.01785     0.99635     0.00616     0.99922     0.31109
                 angstrom     0.68855     0.18682     0.67922     0.18746     0.98990     0.06308     0.94159     4.80061
                  epsilon     1.04683     0.02179     1.04593     0.02154     0.99916     0.00484     0.94506     0.34827