% N_ICE_WARREN08 Complex refractive index for ice % % This parameterisation is a compilation and merge of data across the EM % spectrum. The valid wavelength range is 44 nm to 2 m. The data are % valid for 266 K, no temperature variation is included. % % See further: Warren, S. G., and R. E. Brandt (2008), Optical % constants of ice from the ultraviolet to the microwave: A revised % compilation. J. Geophys. Res., 113, D14220, doi:10.1029/2007JD009744. % % FORMAT n = n_ice_warren08( lambda ) % % OUT n Complex refractive index % IN lambda Vector of wavelengths [m] % 2013-11-29 Created by Patrick Eriksson. function n = n_ice_warren08( lambda ) % la [um], real, imag dat = [ 4.430E-002 0.8228 1.640E-001 4.510E-002 0.8250 1.730E-001 4.590E-002 0.8255 1.830E-001 4.680E-002 0.8258 1.950E-001 4.770E-002 0.8263 2.080E-001 4.860E-002 0.8281 2.230E-001 4.960E-002 0.8347 2.400E-001 5.060E-002 0.8428 2.500E-001 5.170E-002 0.8483 2.590E-001 5.280E-002 0.8505 2.680E-001 5.390E-002 0.8497 2.790E-001 5.510E-002 0.8489 2.970E-001 5.640E-002 0.8519 3.190E-001 5.770E-002 0.8566 3.400E-001 5.900E-002 0.8647 3.660E-001 6.050E-002 0.8797 3.920E-001 6.200E-002 0.8970 4.160E-001 6.360E-002 0.9173 4.400E-001 6.530E-002 0.9400 4.640E-001 6.700E-002 0.9679 4.920E-001 6.890E-002 1.0093 5.170E-001 7.080E-002 1.0536 5.280E-001 7.290E-002 1.0986 5.330E-001 7.380E-002 1.1183 5.340E-001 7.510E-002 1.1449 5.310E-001 7.750E-002 1.1885 5.240E-001 8.000E-002 1.2273 5.100E-001 8.270E-002 1.2629 5.000E-001 8.550E-002 1.3117 4.990E-001 8.860E-002 1.3807 4.680E-001 9.180E-002 1.4091 3.800E-001 9.300E-002 1.4028 3.600E-001 9.540E-002 1.3948 3.390E-001 9.920E-002 1.3964 3.180E-001 1.033E-001 1.4047 2.910E-001 1.078E-001 1.3981 2.510E-001 1.100E-001 1.3886 2.440E-001 1.127E-001 1.3806 2.390E-001 1.140E-001 1.3772 2.390E-001 1.181E-001 1.3783 2.440E-001 1.210E-001 1.3929 2.470E-001 1.240E-001 1.4061 2.240E-001 1.272E-001 1.3999 1.950E-001 1.295E-001 1.3777 1.740E-001 1.305E-001 1.3607 1.720E-001 1.319E-001 1.3389 1.800E-001 1.333E-001 1.3210 1.940E-001 1.348E-001 1.3030 2.130E-001 1.362E-001 1.2871 2.430E-001 1.370E-001 1.2849 2.710E-001 1.378E-001 1.2851 2.890E-001 1.387E-001 1.2970 3.340E-001 1.393E-001 1.3151 3.440E-001 1.409E-001 1.3575 3.820E-001 1.425E-001 1.4130 4.010E-001 1.435E-001 1.4525 4.065E-001 1.442E-001 1.4845 4.050E-001 1.450E-001 1.5157 3.890E-001 1.459E-001 1.5484 3.770E-001 1.468E-001 1.5729 3.450E-001 1.476E-001 1.5915 3.320E-001 1.480E-001 1.6021 3.150E-001 1.485E-001 1.6077 2.980E-001 1.494E-001 1.6156 2.740E-001 1.512E-001 1.6220 2.280E-001 1.531E-001 1.6311 1.980E-001 1.540E-001 1.6345 1.720E-001 1.550E-001 1.6363 1.560E-001 1.569E-001 1.6353 1.100E-001 1.580E-001 1.6309 8.300E-002 1.589E-001 1.6214 5.800E-002 1.610E-001 1.5818 2.200E-002 1.630E-001 1.5482 8.473E-003 1.650E-001 1.5225 3.263E-003 1.670E-001 1.5027 1.256E-003 1.690E-001 1.4870 4.837E-004 1.710E-001 1.4743 1.862E-004 1.730E-001 1.4635 7.165E-005 1.750E-001 1.4543 2.757E-005 1.770E-001 1.4462 1.061E-005 1.790E-001 1.4390 4.081E-006 1.810E-001 1.4326 1.570E-006 1.830E-001 1.4268 5.403E-007 1.850E-001 1.4215 1.829E-007 1.870E-001 1.4167 6.218E-008 1.890E-001 1.4122 2.113E-008 1.910E-001 1.4081 7.181E-009 1.930E-001 1.4043 2.440E-009 1.950E-001 1.4007 8.289E-010 1.970E-001 1.3974 2.816E-010 1.990E-001 1.3943 9.565E-011 2.010E-001 1.3914 3.249E-011 2.019E-001 1.3901 2.0E-011 2.100E-001 1.3801 2.0E-011 2.500E-001 1.3509 2.0E-011 3.000E-001 1.3339 2.0E-011 3.500E-001 1.3249 2.0E-011 3.900E-001 1.3203 2.0E-011 4.000E-001 1.3194 2.365E-011 4.100E-001 1.3185 2.669E-011 4.200E-001 1.3177 3.135E-011 4.300E-001 1.3170 4.140E-011 4.400E-001 1.3163 6.268E-011 4.500E-001 1.3157 9.239E-011 4.600E-001 1.3151 1.325E-010 4.700E-001 1.3145 1.956E-010 4.800E-001 1.3140 2.861E-010 4.900E-001 1.3135 4.172E-010 5.000E-001 1.3130 5.889E-010 5.100E-001 1.3126 8.036E-010 5.200E-001 1.3121 1.076E-009 5.300E-001 1.3117 1.409E-009 5.400E-001 1.3114 1.813E-009 5.500E-001 1.3110 2.289E-009 5.600E-001 1.3106 2.839E-009 5.700E-001 1.3103 3.461E-009 5.800E-001 1.3100 4.159E-009 5.900E-001 1.3097 4.930E-009 6.000E-001 1.3094 5.730E-009 6.100E-001 1.3091 6.890E-009 6.200E-001 1.3088 8.580E-009 6.300E-001 1.3085 1.040E-008 6.400E-001 1.3083 1.220E-008 6.500E-001 1.3080 1.430E-008 6.600E-001 1.3078 1.660E-008 6.700E-001 1.3076 1.890E-008 6.800E-001 1.3073 2.090E-008 6.900E-001 1.3071 2.400E-008 7.000E-001 1.3069 2.900E-008 7.100E-001 1.3067 3.440E-008 7.200E-001 1.3065 4.030E-008 7.300E-001 1.3062 4.300E-008 7.400E-001 1.3060 4.920E-008 7.500E-001 1.3059 5.870E-008 7.600E-001 1.3057 7.080E-008 7.700E-001 1.3055 8.580E-008 7.800E-001 1.3053 1.020E-007 7.900E-001 1.3051 1.180E-007 8.000E-001 1.3049 1.340E-007 8.100E-001 1.3047 1.400E-007 8.200E-001 1.3046 1.430E-007 8.300E-001 1.3044 1.450E-007 8.400E-001 1.3042 1.510E-007 8.500E-001 1.3040 1.830E-007 8.600E-001 1.3039 2.150E-007 8.700E-001 1.3037 2.650E-007 8.800E-001 1.3035 3.350E-007 8.900E-001 1.3033 3.920E-007 9.000E-001 1.3032 4.200E-007 9.100E-001 1.3030 4.440E-007 9.200E-001 1.3028 4.740E-007 9.300E-001 1.3027 5.110E-007 9.400E-001 1.3025 5.530E-007 9.500E-001 1.3023 6.020E-007 9.600E-001 1.3022 7.550E-007 9.700E-001 1.3020 9.260E-007 9.800E-001 1.3019 1.120E-006 9.900E-001 1.3017 1.330E-006 1.000E+000 1.3015 1.620E-006 1.010E+000 1.3014 2.000E-006 1.020E+000 1.3012 2.250E-006 1.030E+000 1.3010 2.330E-006 1.040E+000 1.3009 2.330E-006 1.050E+000 1.3007 2.170E-006 1.060E+000 1.3005 1.960E-006 1.070E+000 1.3003 1.810E-006 1.080E+000 1.3002 1.740E-006 1.090E+000 1.3000 1.730E-006 1.100E+000 1.2998 1.700E-006 1.110E+000 1.2997 1.760E-006 1.120E+000 1.2995 1.820E-006 1.130E+000 1.2993 2.040E-006 1.140E+000 1.2991 2.250E-006 1.150E+000 1.2990 2.290E-006 1.160E+000 1.2988 3.040E-006 1.170E+000 1.2986 3.840E-006 1.180E+000 1.2984 4.770E-006 1.190E+000 1.2982 5.760E-006 1.200E+000 1.2980 6.710E-006 1.210E+000 1.2979 8.660E-006 1.220E+000 1.2977 1.020E-005 1.230E+000 1.2975 1.130E-005 1.240E+000 1.2973 1.220E-005 1.250E+000 1.2971 1.290E-005 1.260E+000 1.2969 1.320E-005 1.270E+000 1.2967 1.350E-005 1.280E+000 1.2965 1.330E-005 1.290E+000 1.2963 1.320E-005 1.300E+000 1.2961 1.320E-005 1.310E+000 1.2959 1.310E-005 1.320E+000 1.2957 1.320E-005 1.330E+000 1.2955 1.320E-005 1.340E+000 1.2953 1.340E-005 1.350E+000 1.2951 1.390E-005 1.360E+000 1.2949 1.420E-005 1.370E+000 1.2946 1.480E-005 1.380E+000 1.2944 1.580E-005 1.390E+000 1.2941 1.740E-005 1.400E+000 1.2939 1.980E-005 1.410E+000 1.2937 3.442E-005 1.420E+000 1.2934 5.959E-005 1.430E+000 1.2931 1.028E-004 1.440E+000 1.2929 1.516E-004 1.449E+000 1.2927 2.030E-004 1.460E+000 1.2924 2.942E-004 1.471E+000 1.2921 3.987E-004 1.481E+000 1.2920 4.941E-004 1.493E+000 1.2918 5.532E-004 1.504E+000 1.2916 5.373E-004 1.515E+000 1.2914 5.143E-004 1.527E+000 1.2912 4.908E-004 1.538E+000 1.2909 4.594E-004 1.563E+000 1.2903 3.858E-004 1.587E+000 1.2897 3.105E-004 1.613E+000 1.2890 2.659E-004 1.650E+000 1.2879 2.361E-004 1.680E+000 1.2870 2.046E-004 1.700E+000 1.2863 1.875E-004 1.730E+000 1.2853 1.650E-004 1.760E+000 1.2843 1.522E-004 1.800E+000 1.2828 1.411E-004 1.830E+000 1.2816 1.302E-004 1.840E+000 1.2811 1.310E-004 1.850E+000 1.2807 1.339E-004 1.855E+000 1.2805 1.377E-004 1.860E+000 1.2802 1.432E-004 1.870E+000 1.2797 1.632E-004 1.890E+000 1.2788 2.566E-004 1.905E+000 1.2780 4.081E-004 1.923E+000 1.2771 7.060E-004 1.942E+000 1.2762 1.108E-003 1.961E+000 1.2756 1.442E-003 1.980E+000 1.2750 1.614E-003 2.000E+000 1.2744 1.640E-003 2.020E+000 1.2736 1.566E-003 2.041E+000 1.2728 1.458E-003 2.062E+000 1.2718 1.267E-003 2.083E+000 1.2707 1.023E-003 2.105E+000 1.2694 7.586E-004 2.130E+000 1.2677 5.255E-004 2.150E+000 1.2663 4.025E-004 2.170E+000 1.2648 3.235E-004 2.190E+000 1.2633 2.707E-004 2.220E+000 1.2609 2.228E-004 2.240E+000 1.2591 2.037E-004 2.245E+000 1.2587 2.026E-004 2.250E+000 1.2582 2.035E-004 2.260E+000 1.2573 2.078E-004 2.270E+000 1.2564 2.171E-004 2.290E+000 1.2545 2.538E-004 2.310E+000 1.2525 3.138E-004 2.330E+000 1.2504 3.858E-004 2.350E+000 1.2482 4.591E-004 2.370E+000 1.2459 5.187E-004 2.390E+000 1.2435 5.605E-004 2.410E+000 1.2409 5.956E-004 2.430E+000 1.2382 6.259E-004 2.460E+000 1.2337 6.820E-004 2.500E+000 1.2270 7.530E-004 2.520E+000 1.2232 7.685E-004 2.550E+000 1.2169 7.647E-004 2.565E+000 1.2135 7.473E-004 2.580E+000 1.2097 7.392E-004 2.590E+000 1.2071 7.437E-004 2.600E+000 1.2043 7.543E-004 2.620E+000 1.1983 8.059E-004 2.675E+000 1.1776 1.367E-003 2.725E+000 1.1507 3.508E-003 2.778E+000 1.1083 1.346E-002 2.817E+000 1.0657 3.245E-002 2.833E+000 1.0453 4.572E-002 2.849E+000 1.0236 6.287E-002 2.865E+000 1.0001 8.548E-002 2.882E+000 0.9747 1.198E-001 2.899E+000 0.9563 1.690E-001 2.915E+000 0.9538 2.210E-001 2.933E+000 0.9678 2.760E-001 2.950E+000 0.9873 3.120E-001 2.967E+000 1.0026 3.470E-001 2.985E+000 1.0180 3.880E-001 3.003E+000 1.0390 4.380E-001 3.021E+000 1.0722 4.930E-001 3.040E+000 1.1259 5.540E-001 3.058E+000 1.2089 6.120E-001 3.077E+000 1.3215 6.250E-001 3.096E+000 1.4225 5.930E-001 3.115E+000 1.4933 5.390E-001 3.135E+000 1.5478 4.910E-001 3.155E+000 1.5970 4.380E-001 3.175E+000 1.6336 3.720E-001 3.195E+000 1.6477 3.000E-001 3.215E+000 1.6405 2.380E-001 3.236E+000 1.6248 1.930E-001 3.257E+000 1.6108 1.580E-001 3.279E+000 1.5905 1.210E-001 3.300E+000 1.5714 1.030E-001 3.322E+000 1.5559 8.360E-002 3.345E+000 1.5396 6.680E-002 3.367E+000 1.5241 5.312E-002 3.390E+000 1.5086 4.286E-002 3.413E+000 1.4949 3.523E-002 3.436E+000 1.4827 2.887E-002 3.460E+000 1.4710 2.347E-002 3.484E+000 1.4604 1.921E-002 3.509E+000 1.4502 1.586E-002 3.534E+000 1.4411 1.326E-002 3.559E+000 1.4328 1.130E-002 3.624E+000 1.4146 8.146E-003 3.732E+000 1.3924 6.672E-003 3.775E+000 1.3850 6.966E-003 3.847E+000 1.3750 8.248E-003 3.969E+000 1.3623 1.112E-002 4.099E+000 1.3526 1.471E-002 4.239E+000 1.3447 1.867E-002 4.348E+000 1.3406 2.411E-002 4.387E+000 1.3401 2.656E-002 4.444E+000 1.3412 2.990E-002 4.505E+000 1.3444 3.179E-002 4.547E+000 1.3473 3.090E-002 4.560E+000 1.3482 3.007E-002 4.580E+000 1.3491 2.883E-002 4.719E+000 1.3470 1.940E-002 4.904E+000 1.3379 1.347E-002 5.000E+000 1.3325 1.240E-002 5.100E+000 1.3268 1.220E-002 5.200E+000 1.3212 1.302E-002 5.263E+000 1.3176 1.380E-002 5.400E+000 1.3100 1.683E-002 5.556E+000 1.3013 2.232E-002 5.714E+000 1.2933 3.256E-002 5.747E+000 1.2917 3.539E-002 5.780E+000 1.2906 3.883E-002 5.814E+000 1.2902 4.270E-002 5.848E+000 1.2904 4.643E-002 5.882E+000 1.2915 5.045E-002 6.061E+000 1.3015 6.439E-002 6.135E+000 1.3083 6.560E-002 6.250E+000 1.3152 6.360E-002 6.289E+000 1.3167 6.265E-002 6.329E+000 1.3178 6.170E-002 6.369E+000 1.3187 6.101E-002 6.410E+000 1.3194 6.031E-002 6.452E+000 1.3201 5.964E-002 6.494E+000 1.3207 5.899E-002 6.579E+000 1.3214 5.780E-002 6.667E+000 1.3219 5.700E-002 6.757E+000 1.3229 5.680E-002 6.897E+000 1.3242 5.428E-002 7.042E+000 1.3244 5.161E-002 7.143E+000 1.3236 4.940E-002 7.246E+000 1.3229 4.840E-002 7.353E+000 1.3218 4.600E-002 7.463E+000 1.3200 4.440E-002 7.576E+000 1.3183 4.290E-002 7.692E+000 1.3158 4.041E-002 7.812E+000 1.3123 3.911E-002 7.937E+000 1.3086 3.819E-002 8.065E+000 1.3047 3.760E-002 8.197E+000 1.3007 3.724E-002 8.333E+000 1.2964 3.700E-002 8.475E+000 1.2917 3.677E-002 8.696E+000 1.2835 3.654E-002 8.929E+000 1.2735 3.664E-002 9.091E+000 1.2655 3.706E-002 9.259E+000 1.2561 3.789E-002 9.524E+000 1.2387 4.026E-002 9.804E+000 1.2151 4.450E-002 1.000E+001 1.1926 5.008E-002 1.020E+001 1.1659 6.461E-002 1.031E+001 1.1501 7.500E-002 1.042E+001 1.1323 8.800E-002 1.053E+001 1.1136 1.080E-001 1.064E+001 1.0971 1.340E-001 1.075E+001 1.0867 1.680E-001 1.087E+001 1.0833 2.040E-001 1.100E+001 1.0886 2.480E-001 1.111E+001 1.1023 2.800E-001 1.136E+001 1.1439 3.410E-001 1.163E+001 1.1983 3.790E-001 1.190E+001 1.2546 4.090E-001 1.220E+001 1.3194 4.220E-001 1.250E+001 1.3822 4.220E-001 1.282E+001 1.4412 4.030E-001 1.299E+001 1.4683 3.890E-001 1.316E+001 1.4928 3.740E-001 1.333E+001 1.5132 3.540E-001 1.351E+001 1.5300 3.350E-001 1.370E+001 1.5458 3.150E-001 1.389E+001 1.5596 2.940E-001 1.408E+001 1.5701 2.710E-001 1.429E+001 1.5775 2.460E-001 1.471E+001 1.5762 1.980E-001 1.515E+001 1.5637 1.640E-001 1.538E+001 1.5559 1.520E-001 1.563E+001 1.5481 1.420E-001 1.613E+001 1.5353 1.280E-001 1.639E+001 1.5302 1.250E-001 1.667E+001 1.5294 1.230E-001 1.695E+001 1.5306 1.160E-001 1.724E+001 1.5303 1.070E-001 1.818E+001 1.5141 7.900E-002 1.832E+001 1.5104 7.752E-002 1.861E+001 1.5043 7.455E-002 1.887E+001 1.4982 7.200E-002 1.923E+001 1.4939 7.600E-002 1.961E+001 1.4963 7.500E-002 2.000E+001 1.4986 6.700E-002 2.041E+001 1.4956 5.500E-002 2.083E+001 1.4877 4.500E-002 2.222E+001 1.4575 2.900E-002 2.260E+001 1.4486 2.750E-002 2.305E+001 1.4390 2.700E-002 2.360E+001 1.4282 2.730E-002 2.460E+001 1.4102 2.890E-002 2.500E+001 1.4030 3.000E-002 2.600E+001 1.3854 3.400E-002 2.857E+001 1.3404 5.122E-002 3.100E+001 1.2969 8.615E-002 3.333E+001 1.2641 1.348E-001 3.448E+001 1.2530 1.615E-001 3.564E+001 1.2445 1.895E-001 3.700E+001 1.2371 2.227E-001 3.824E+001 1.2317 2.528E-001 3.960E+001 1.2243 2.853E-001 4.114E+001 1.2054 3.240E-001 4.276E+001 1.1742 3.945E-001 4.358E+001 1.1549 4.521E-001 4.458E+001 1.1496 5.535E-001 4.550E+001 1.1853 6.782E-001 4.615E+001 1.2543 7.684E-001 4.671E+001 1.3474 8.254E-001 4.736E+001 1.4725 8.458E-001 4.800E+001 1.5874 8.158E-001 4.878E+001 1.6841 7.414E-001 5.003E+001 1.7505 6.191E-001 5.128E+001 1.7649 5.353E-001 5.275E+001 1.7668 4.780E-001 5.350E+001 1.7687 4.599E-001 5.424E+001 1.7792 4.468E-001 5.500E+001 1.7955 4.214E-001 5.574E+001 1.8052 3.860E-001 5.640E+001 1.8041 3.508E-001 5.700E+001 1.7940 3.196E-001 5.746E+001 1.7805 2.981E-001 5.840E+001 1.7410 2.659E-001 5.929E+001 1.6930 2.569E-001 6.000E+001 1.6610 2.785E-001 6.100E+001 1.6419 3.076E-001 6.125E+001 1.6396 3.146E-001 6.250E+001 1.6372 3.471E-001 6.378E+001 1.6471 3.748E-001 6.467E+001 1.6596 3.902E-001 6.558E+001 1.6754 4.024E-001 6.655E+001 1.6945 4.115E-001 6.760E+001 1.7167 4.167E-001 6.900E+001 1.7466 4.167E-001 7.053E+001 1.7780 4.089E-001 7.300E+001 1.8185 3.830E-001 7.500E+001 1.8419 3.543E-001 7.629E+001 1.8504 3.340E-001 8.000E+001 1.8617 2.944E-001 8.297E+001 1.8669 2.679E-001 8.500E+001 1.8688 2.519E-001 8.680E+001 1.8699 2.390E-001 9.080E+001 1.8698 2.140E-001 9.517E+001 1.8681 1.913E-001 1.000E+002 1.8654 1.706E-001 1.200E+002 1.8499 1.151E-001 1.600E+002 1.8268 6.684E-002 2.100E+002 1.8114 4.282E-002 3.000E+002 1.7989 2.549E-002 5.000E+002 1.7908 1.405E-002 1.300E+003 1.7868 5.173E-003 5.000E+003 1.7861 1.337E-003 1.900E+004 1.7861 3.574E-004 3.900E+004 1.7861 1.839E-004 6.100E+004 1.7861 1.294E-004 8.600E+004 1.7861 1.058E-004 1.100E+005 1.7861 9.675E-005 1.400E+005 1.7861 9.360E-005 1.800E+005 1.7861 9.613E-005 2.400E+005 1.7861 1.066E-004 3.400E+005 1.7861 1.312E-004 5.400E+005 1.7861 1.895E-004 1.000E+006 1.7861 3.348E-004 2.000E+006 1.7861 6.596E-004]; % Data and interpolation approach taken from % http://www.atmos.washington.edu/ice_optical_constants/ b = interp1( log(dat(:,1)), [dat(:,2),log(dat(:,3))], log(lambda*1e6) ); n = b(:,1) + i*exp(b(:,2));