Region: SPG

                                     vt01                  vt02             vt02/vt01         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.03380     0.01120     0.02588     0.00857     0.76700     0.02661
                  Rrs_410     0.01861     0.00388     0.01868     0.00387     1.00452     0.00226
                  Rrs_443     0.01363     0.00237     0.01349     0.00236     0.98991     0.00184
                  Rrs_486     0.00802     0.00091     0.00800     0.00089     0.99749     0.00253
                  Rrs_551     0.00175     0.00014     0.00158     0.00015     0.90135     0.01593
                  Rrs_671     0.00014     0.00002     0.00008     0.00002     0.52672     0.06754
                  aot_862     0.07107     0.02511     0.07105     0.02512     0.99962     0.00043
                 angstrom     0.80545     0.24591     0.80556     0.24581     1.00017     0.00061