From Roush et al. (2007) Figure 15c and 15d, Hapke-Shkuratov averages
frequency (cm-1)         avg. imag. indx.       error avg. imag. indx.
3.000000000000000e+1	2.280000000000000e-2	0.0000000000000000
5.000000000000000e+1	4.120000000000000e-2	0.0000000000000000
7.000000000000000e+1	6.650000000000000e-2	0.0000000000000000
9.000000000000000e+1	1.136000000000000e-1	0.0000000000000000
1.100000000000000e+2	4.007000000000000e-1	0.0000000000000000
1.300000000000000e+2	7.991000000000000e-1	0.0000000000000000
1.500000000000000e+2	5.416000000000000e-1	0.0000000000000000
1.700000000000000e+2	1.157000000000000e+0	0.0000000000000000
1.900000000000000e+2	1.570500000000000e+0	0.0000000000000000
2.100000000000000e+2	1.902300000000000e+0	0.0000000000000000
2.300000000000000e+2	1.780400000000000e+0	0.0000000000000000
2.500000000000000e+2	1.099600000000000e+0	0.0000000000000000
2.700000000000000e+2	7.528000000000000e-1	0.0000000000000000
2.900000000000000e+2	7.931000000000000e-1	0.0000000000000000
3.100000000000000e+2	8.911000000000000e-1	0.0000000000000000
3.300000000000000e+2	6.212000000000000e-1	0.0000000000000000
3.500000000000000e+2	5.001000000000000e-1	0.0000000000000000
3.700000000000000e+2	4.370000000000000e-1	0.0000000000000000
3.900000000000000e+2	4.022000000000000e-1	0.0000000000000000
4.100000000000000e+2	4.001000000000000e-1	0.0000000000000000
4.300000000000000e+2	4.185000000000000e-1	0.0000000000000000
4.500000000000000e+2	4.375000000000000e-1	0.0000000000000000
4.700000000000000e+2	4.197000000000000e-1	0.0000000000000000
4.900000000000000e+2	3.764000000000000e-1	0.0000000000000000
5.100000000000000e+2	3.468000000000000e-1	0.0000000000000000
5.300000000000000e+2	3.465000100000000e-1	0.0000000000000000
5.500000000000000e+2	3.466000000000000e-1	0.0000000000000000
5.700000000000000e+2	3.756000000000000e-1	0.0000000000000000
5.900000000000000e+2	7.165000000000000e-1	0.0000000000000000
6.100000000000000e+2	6.438000000000000e-1	0.0000000000000000
6.300000000000000e+2	2.989000000000000e-1	0.0000000000000000
6.500000000000000e+2	1.900300000000000e-1	2.887200000000000e-5
6.700000000000000e+2	6.724400000000000e-1	6.656800000000000e-3
6.900000000000000e+2	1.370000000000000e-1	4.618800000000000e-4
7.100000000000000e+2	7.251600000000000e-2	1.789900000000000e-5
7.300000000000000e+2	5.331200000000000e-2	1.327900000000000e-5
7.500000000000000e+2	4.270600000000000e-2	6.927700000000000e-6
7.700000000000000e+2	3.580000000000000e-2	0.0000000000000000
7.900000000000000e+2	3.081100000000000e-2	1.327900000000000e-5
8.100000000000000e+2	2.719900000000000e-2	1.732500000000000e-6
8.300000000000000e+2	2.448900000000000e-2	1.270200000000000e-5
8.500000000000000e+2	2.240000000000000e-2	0.0000000000000000
8.700000000000000e+2	2.090000000000000e-2	0.0000000000000000
8.900000000000000e+2	1.998800000000000e-2	1.385700000000000e-5
9.100000000000000e+2	1.950000000000000e-2	0.0000000000000000
9.300000000000000e+2	1.950800000000000e-2	8.660200000000000e-6
9.500000000000000e+2	2.020000000000000e-2	0.0000000000000000
9.700000000000000e+2	2.180000000000000e-2	0.0000000000000000
9.900000000000000e+2	2.460000000000000e-2	0.0000000000000000
1.010000000000000e+3	2.950000000000000e-2	0.0000000000000000
1.030000000000000e+3	3.819900000000000e-2	1.152800000000000e-6
1.050000000000000e+3	5.521200000000000e-2	1.385800000000000e-5
1.070000000000000e+3	9.497000000000000e-2	8.083100000000000e-5
1.090000000000000e+3	2.379900000000000e-1	4.561100000000000e-4
1.110000000000000e+3	1.402400000000000e+0	8.891200000000000e-3
1.130000000000000e+3	2.159400000000000e+0	2.078500000000000e-3
1.150000000000000e+3	1.737900000000000e+0	3.464000000000000e-4
1.170000000000000e+3	8.997300000000000e-1	2.713400000000000e-4
1.190000000000000e+3	3.269500000000000e-1	5.772700000000000e-5
1.210000000000000e+3	1.043400000000000e-1	1.616600000000000e-4
1.230000000000000e+3	5.621700000000000e-2	2.020700000000000e-5
1.250000000000000e+3	3.680500000000000e-2	5.196300000000000e-6
1.270000000000000e+3	2.661200000000000e-2	1.443400000000000e-5
1.290000000000000e+3	2.050000000000000e-2	5.774900000000000e-7
1.310000000000000e+3	1.650000000000000e-2	5.774900000000000e-7
1.330000000000000e+3	1.370000000000000e-2	0.0000000000000000
1.350000000000000e+3	1.160200000000000e-2	2.309400000000000e-6
1.370000000000000e+3	1.010000000000000e-2	0.0000000000000000
1.390000000000000e+3	8.922500000000000e-3	4.272000000000000e-6
1.410000000000000e+3	8.009400000000000e-3	0.0000000000000000
1.430000000000000e+3	7.271900000000000e-3	1.328100000000000e-6
1.450000000000000e+3	6.695700000000000e-3	0.0000000000000000
1.470000000000000e+3	6.257700000000000e-3	1.153400000000000e-7
1.490000000000000e+3	5.952100000000000e-3	2.309400000000000e-7
1.510000000000000e+3	5.796300000000000e-3	1.153400000000000e-7
1.530000000000000e+3	5.848600000000000e-3	3.462800100000000e-7
1.550000000000000e+3	6.267700000000000e-3	9.237699999999998e-7
1.570000000000000e+3	7.531800000000000e-3	3.465500100000000e-7
1.590000000000000e+3	1.191100000000000e-2	1.270200000000000e-5
1.610000000000000e+3	4.292300000000000e-2	3.729700000000000e-4
1.630000000000000e+3	1.581200000000000e-1	5.978999999999999e-4
1.650000000000000e+3	2.447100000000000e-2	8.198400000000000e-5
1.670000000000000e+3	4.026400000000000e-2	7.469800000000000e-5
1.690000000000000e+3	8.330800000000000e-2	2.214800000000000e-4
1.710000000000000e+3	2.054300000000000e-2	4.907500000000000e-5
1.730000000000000e+3	9.020100000000000e-3	5.711700000000000e-4
1.750000000000000e+3	5.823800000000000e-3	3.139300000000000e-4
1.770000000000000e+3	4.434600000000000e-3	2.026100000000000e-4
1.790000000000000e+3	3.605300000000000e-3	9.190600000000000e-5
1.810000000000000e+3	3.014900000000000e-3	7.119000000000000e-5
1.830000000000000e+3	2.510700000000000e-3	2.692700000000000e-4
1.850000000000000e+3	2.281600000000000e-3	2.996000000000000e-4
1.870000000000000e+3	2.155500000000000e-3	3.146900000000000e-4
1.890000000000000e+3	2.042600000000000e-3	3.373400000000000e-4
1.910000000000000e+3	1.939400000000000e-3	3.658700000000000e-4
1.930000000000000e+3	1.961700000000000e-3	3.757100000000000e-4
1.950000000000000e+3	2.038000000000000e-3	3.652500000000000e-4
1.970000000000000e+3	2.087400000000000e-3	3.611100000000000e-4
1.990000000000000e+3	2.098000000000000e-3	3.633900000000000e-4
2.020000000000000e+3	2.153100000000000e-3	3.828000000000000e-4
2.060000000000000e+3	2.631100000000000e-3	3.625600000000000e-4
2.100000000000000e+3	5.981200000000000e-3	8.579300000000000e-4
2.140000000000000e+3	8.377100000000000e-3	3.103200000000000e-3
2.180000000000000e+3	9.672000000000000e-3	3.483800000000000e-3
2.220000000000000e+3	1.409300000000000e-2	7.639900000000000e-3
2.260000000000000e+3	1.165000000000000e-2	5.698000000000000e-3
2.300000000000000e+3	6.976600000000000e-3	2.115300000000000e-3
2.340000000000000e+3	3.385500000000000e-3	1.820200000000000e-4
2.380000000000000e+3	2.003600000000000e-3	3.919800000000000e-4
2.420000000000000e+3	1.398400000000000e-3	4.621000000000000e-4
2.460000000000000e+3	1.043600000000000e-3	4.599500000000000e-4
2.500000000000000e+3	8.468000000000000e-4	4.530900000000000e-4
2.540000000000000e+3	7.210400000000000e-4	4.378100000000000e-4
2.580000000000000e+3	7.043500000000000e-4	4.363000000000000e-4
2.620000000000000e+3	6.356200000000001e-4	4.364500000000000e-4
2.660000000000000e+3	6.436100000000000e-4	4.510500000000000e-4
2.700000000000000e+3	6.629800000000000e-4	4.652100000000000e-4
2.740000000000000e+3	7.233400000000000e-4	4.885400000000000e-4
2.780000000000000e+3	8.200000000000000e-4	5.254000000000000e-4
2.820000000000000e+3	9.203300000000000e-4	5.525100000000000e-4
2.860000000000000e+3	1.029800000000000e-3	5.982300000000001e-4
2.900000000000000e+3	1.160300000000000e-3	6.295900000000000e-4
2.940000000000000e+3	1.333500000000000e-3	6.618500000000000e-4
2.980000000000000e+3	1.608300000000000e-3	6.447400000000000e-4
3.020000000000000e+3	1.992300000000000e-3	5.978500000000000e-4
3.060000000000000e+3	2.645500000000000e-3	3.915000000000000e-4
3.100000000000000e+3	3.480200000000000e-3	2.800200000000000e-4
3.140000000000000e+3	4.498800000000000e-3	1.153400000000000e-7
3.180000000000000e+3	5.857900000000000e-3	1.039100000000000e-6
3.220000000000000e+3	8.064100000000000e-3	5.769500000000000e-7
3.260000000000000e+3	1.200100000000000e-2	1.154400000000000e-6
3.300000000000000e+3	2.020000000000000e-2	4.991899999999999e-7
3.340000000000000e+3	4.242100000000000e-2	2.482700000000000e-5
3.380000000000000e+3	1.345000000000000e-1	2.309400000000000e-4
3.420000000000000e+3	2.433900000000000e-1	2.424800000000000e-4
3.460000000000000e+3	1.009000000000000e-1	0.0000000000000000
3.500000000000000e+3	1.343800000000000e-1	8.660800000000000e-5
3.540000000000000e+3	3.077800000000000e-1	5.946700000000001e-4
3.580000000000000e+3	1.118600000000000e-1	7.505400000000000e-5
3.620000000000000e+3	3.460700000000000e-2	4.044500000000000e-3
3.660000000000000e+3	1.421400000000000e-2	5.536700000000000e-3
3.700000000000000e+3	7.502000000000000e-3	4.618400000000000e-3
3.740000000000000e+3	4.823100000000000e-3	3.369000000000000e-3
3.780000000000000e+3	3.395200000000000e-3	2.573100000000000e-3
3.820000000000000e+3	2.640400000000000e-3	1.916600000000000e-3
3.860000000000000e+3	2.157700000000000e-3	1.438200000000000e-3
3.900000000000000e+3	1.812700000000000e-3	1.104300000000000e-3
3.940000000000000e+3	1.538100000000000e-3	8.830500000000000e-4
3.980000000000000e+3	1.373200000000000e-3	6.660600000000000e-4
4.009770000000000e+3	1.149400000000000e-3	3.411700000000000e-4
4.029060000000000e+3	1.139500000000000e-3	3.398200000000000e-4
4.048350000000000e+3	1.075100000000000e-3	3.154700000000000e-4
4.067640000000000e+3	9.924000000000000e-4	3.174600000000000e-4
4.086920000000000e+3	9.602300000000000e-4	3.116900000000000e-4
4.106200000000000e+3	9.234000000000000e-4	3.067000000000000e-4
4.125500000000000e+3	8.544900000000000e-4	2.961800000000000e-4
4.144790000000000e+3	7.574600000000000e-4	2.613100000000000e-4
4.164060000000001e+3	6.043000000000000e-4	2.293000000000000e-4
4.183350000000000e+3	4.637400000000000e-4	2.000600000000000e-4
4.202630000000000e+3	3.707200000000000e-4	1.752300100000000e-4
4.221920000000000e+3	3.065900000000000e-4	1.570800000000000e-4
4.241220000000000e+3	2.658100000000000e-4	1.433800000000000e-4
4.260500000000000e+3	2.381100000000000e-4	1.307500000000000e-4
4.279800000000000e+3	2.203800000000000e-4	1.219700000000000e-4
4.299080000000000e+3	2.108500000000000e-4	1.160600000000000e-4
4.318370000000000e+3	2.063800000000000e-4	1.139400000000000e-4
4.337640000000000e+3	2.058500000000000e-4	1.142500000000000e-4
4.356939999999999e+3	2.100800000000000e-4	1.171000000000000e-4
4.376229999999999e+3	2.217400000000000e-4	1.257300000000000e-4
4.395510000000000e+3	2.484900000000000e-4	1.430000000000000e-4
4.414800000000000e+3	2.519300000000000e-4	1.417500000000000e-4
4.434080000000000e+3	2.359000000000000e-4	1.346900000000000e-4
4.453370000000000e+3	2.334300000000000e-4	1.334500000000000e-4
4.472650000000000e+3	2.437700000000000e-4	1.412300000000000e-4
4.491939999999999e+3	2.770700000000000e-4	1.592900000000000e-4
4.511229999999999e+3	2.947700000000000e-4	1.601100000000000e-4
4.530520000000001e+3	2.698300000000000e-4	1.528800000000000e-4
4.549820000000000e+3	2.471100000000000e-4	1.430900000000000e-4
4.569090000000000e+3	2.369900000000000e-4	1.376100000000000e-4
4.588380000000000e+3	2.321900000000000e-4	1.351400000000000e-4
4.607680000000000e+3	2.212700000000000e-4	1.277100000000000e-4
4.626950000000000e+3	2.063200000000000e-4	1.176600000000000e-4
4.646229999999999e+3	1.914200000000000e-4	1.085200000000000e-4
4.665530000000000e+3	1.791400000000000e-4	1.012200000000000e-4
4.684830000000000e+3	1.692500000000000e-4	9.531700000000000e-5
4.704110000000000e+3	1.588600000000000e-4	8.855800000000000e-5
4.723400000000000e+3	1.477700000000000e-4	8.197400000000000e-5
4.742689999999999e+3	1.365500000000000e-4	7.556000000000000e-5
4.761970000000000e+3	1.276700000000000e-4	6.894900099999999e-5
4.781260000000000e+3	1.198100000000000e-4	6.499300000000001e-5
4.800540000000000e+3	1.151200000000000e-4	6.237999999999999e-5
4.819830000000000e+3	1.132600000000000e-4	6.270600000000001e-5
4.839120000000000e+3	1.142000000000000e-4	6.051600000000000e-5
4.858400000000000e+3	1.111400000000000e-4	6.024400000000000e-5
4.877689999999999e+3	1.115500000000000e-4	6.102300000000000e-5
4.896970000000000e+3	1.166000000000000e-4	6.476700000000000e-5
4.916250000000000e+3	1.252100000000000e-4	7.070000000000000e-5
4.935540000000000e+3	1.381700000000000e-4	7.942700000000000e-5
4.954840000000000e+3	1.597100000000000e-4	9.353100000000000e-5
4.974130000000000e+3	1.975500000000000e-4	1.178900000000000e-4
4.993410000000000e+3	2.775600000000000e-4	1.733900000000000e-4
5.060729999999999e+3	6.647500000000000e-4	3.120600000000000e-4
5.165290000000000e+3	1.028500000000000e-3	3.612700000000000e-4
5.274260000000000e+3	2.094600000000000e-4	8.290800000000000e-5
5.387930000000000e+3	5.066200000000000e-5	1.617200000000000e-5
5.506610000000000e+3	4.198600000000000e-5	1.431400000000000e-5
5.630630000000000e+3	6.435600000000001e-5	2.598300000000000e-5
5.760370000000000e+3	6.302100000000001e-5	2.190800000000000e-5
5.896229999999999e+3	2.185000000000000e-5	6.856100000000000e-6
6.038650000000000e+3	1.807500000000000e-5	5.723300000000000e-6
6.188120000000000e+3	2.431900000000000e-5	6.846700000000000e-6
6.345180000000000e+3	3.716900000000000e-5	1.267300000000000e-5
6.510420000000000e+3	6.762500000000000e-5	2.847800000000000e-5
6.684490000000000e+3	8.381100000000000e-5	4.201600000000000e-5
6.868130000000000e+3	9.961500000000000e-5	5.244100000000000e-5
7.062150000000000e+3	4.421300000000000e-5	1.468500000000000e-5
7.267440000000000e+3	2.218600000000000e-5	6.318300000000000e-6
7.485030000000000e+3	1.307900000000000e-5	4.443500000000000e-6
7.716050000000000e+3	8.848200000000000e-6	3.537400100000000e-6
7.961780000000000e+3	8.868100000000000e-6	3.328800000000000e-6
8.223680000000000e+3	1.100000000000000e-5	3.388200000000000e-6
8.503400000000000e+3	1.076700000000000e-5	3.447100000000000e-6
8.802820000000000e+3	4.930400000000000e-6	2.510600000000000e-6
9.124090000000000e+3	4.004100000000000e-6	2.090800000000000e-6
9.469700000000000e+3	3.734800000000000e-6	2.020900000000000e-6
9.842520000000000e+3	4.537900000000000e-6	2.113400000000000e-6
1.024590000000000e+4	4.460200000000000e-6	2.202100000000000e-6
1.068376000000000e+4	3.258600000000000e-6	1.812600000000000e-6
1.116071000000000e+4	2.973200000000000e-6	1.598200000000000e-6
1.168224000000000e+4	2.827100000000000e-6	1.462400000000000e-6
1.225490000000000e+4	2.583800000000000e-6	1.452500000000000e-6
1.259446000000000e+4	2.570600000000000e-6	1.449000000000000e-6
1.275510000000000e+4	2.524200000000000e-6	1.458300000000000e-6
1.291990000000000e+4	2.514800000000000e-6	1.445300000000000e-6
1.308900000000000e+4	2.526100000000000e-6	1.516600000000000e-6
1.326260000000000e+4	2.459400000000000e-6	1.517100000000000e-6
1.344086000000000e+4	2.278100000000000e-6	1.370300000000000e-6
1.362398000000000e+4	2.249500000000000e-6	1.386300000000000e-6
1.381216000000000e+4	2.238500000000000e-6	1.392700000000000e-6
1.400560000000000e+4	2.206000000000000e-6	1.368600000000000e-6
1.420455000000000e+4	2.151000000000000e-6	1.288500000000000e-6
1.440922000000000e+4	2.125200000000000e-6	1.263100000000000e-6
1.461988000000000e+4	2.147700000000000e-6	1.283100000000000e-6
1.483679000000000e+4	2.109900000000000e-6	1.221700000000000e-6
1.506024000000000e+4	2.122000000000000e-6	1.286800000000000e-6
1.529052000000000e+4	2.060100000000000e-6	1.186300000000000e-6
1.552795000000000e+4	2.083100000000000e-6	1.255500000000000e-6
1.577287000000000e+4	2.058700000000000e-6	1.238300000000000e-6
1.602564000000000e+4	1.996000000000000e-6	1.168600000000000e-6
1.628664000000000e+4	1.939900000000000e-6	1.109700000000000e-6
1.655629000000000e+4	1.970500000000000e-6	1.157100000000000e-6
1.683502000000000e+4	1.953900000000000e-6	1.121700000000000e-6
1.712329000000000e+4	2.032200000000000e-6	1.248000000000000e-6
1.742160100000000e+4	1.979000000000000e-6	1.123100000000000e-6
1.773050000000000e+4	1.897900000000000e-6	9.468600000000000e-7
1.805054000000000e+4	2.013600000000000e-6	1.090300000000000e-6
1.838235000000000e+4	2.077300000000000e-6	1.143900000000000e-6
1.872659000000000e+4	2.167400000000000e-6	1.239500000000000e-6
1.908397000000000e+4	2.115100000000000e-6	1.087100000000000e-6
1.945525000000000e+4	2.179600000000000e-6	1.069000000000000e-6
1.984127000000000e+4	2.258400000000000e-6	1.098600000000000e-6
2.024291000000000e+4	2.324100000000000e-6	1.141500000000000e-6
2.066116000000000e+4	2.385200000000000e-6	1.080700000000000e-6
2.109705000000000e+4	2.399800000000000e-6	9.958799999999998e-7
2.155172000000000e+4	2.481200000000000e-6	1.030700000000000e-6
2.202643000000000e+4	2.525000000000000e-6	1.032900000000000e-6
2.252252000000000e+4	2.642100000000000e-6	1.061000000000000e-6
2.304147000000000e+4	2.738400000000000e-6	1.083900000000000e-6
2.358491000000000e+4	2.863000000000000e-6	1.126500000000000e-6
2.415459000000000e+4	2.952500000000000e-6	1.136900000000000e-6
2.475247000000000e+4	3.073200000000000e-6	1.236000000000000e-6