Region: SPG

                                         vt21                    vt22                   vt22/vt21
                     Prod       mean       stdev        mean       stdev        mean       stdev         R^2        mapd
                  chlor_a     0.02309     0.01237     0.02496     0.01329     1.08526     0.05244     0.99563     8.09496
                  Rrs_410     0.01778     0.00319     0.01726     0.00316     0.97051     0.01881     0.98925     2.71440
                  Rrs_443     0.01312     0.00197     0.01273     0.00195     0.96970     0.01446     0.99083     2.94034
                  Rrs_486     0.00756     0.00070     0.00737     0.00071     0.97429     0.00945     0.99137     2.77147
                  Rrs_551     0.00146     0.00008     0.00145     0.00008     0.99516     0.01378     0.94325     1.30915
                  Rrs_671     0.00013     0.00002     0.00013     0.00002     1.01312     0.03002     0.96227     1.47725
                  aot_862     0.07916     0.01795     0.07822     0.01775     0.98825     0.00731     0.99893     0.96049
                 angstrom     0.68847     0.18678     0.68201     0.18951     0.99550     0.08178     0.90981     6.90716
                  epsilon     1.04682     0.02179     1.04625     0.02166     0.99948     0.00616     0.91199     0.48859