Region: global

                        at18                at20           at20/at18         
          Prod     mean     stdev      mean     stdev      mean     stdev
       nLw_412     1.674     0.066     1.602     0.066     0.957     0.008
       nLw_443     1.456     0.055     1.391     0.057     0.955     0.004
       nLw_490     1.127     0.033     1.087     0.033     0.965     0.002
       nLw_510     0.479     0.013     0.461     0.013     0.962     0.002
       nLw_555     0.349     0.010     0.329     0.010     0.942     0.003
       nLw_670     0.030     0.001     0.028     0.001     0.911     0.004
       chlor_a     0.300     0.041     0.318     0.047     1.055     0.020
        eps_78     1.039     0.008     1.042     0.008     1.003     0.000
       tau_865     0.116     0.005     0.116     0.005     0.992     0.001
  angstrom_510     0.290     0.037     0.304     0.037     1.052     0.006