Elevation Red Coeff. Green Coeff. Blue Coeff. 90 1.000 1.000 1.000 80 1.001 1.002 1.003 70 1.005 1.010 1.014 60 1.013 1.025 1.035 55 1.018 1.036 1.050 50 1.025 1.050 1.070 45 1.034 1.068 1.097 40 1.046 1.092 1.132 35 1.063 1.125 1.180 30 1.085 1.172 1.249 25 1.118 1.242 1.356 20 1.170 1.356 1.535 15 1.263 1.574 1.892