# extracted from http://www.astrium-geo.com/files/pmedia/public/r453_9_spectralsensivity.xls
# second column HRG1, third column HRG2
1520  0.017621  0.011053
1525  0.023435  0.015040
1530  0.029350  0.019075
1535  0.037979  0.024832
1540  0.046512  0.030694
1545  0.064786  0.043297
1550  0.083118  0.056146
1555  0.124605  0.087844
1560  0.167284  0.119802
1565  0.241562  0.182893
1570  0.315263  0.246690
1575  0.403123  0.331254
1580  0.489303  0.415451
1585  0.574851  0.512975
1590  0.663255  0.610214
1595  0.759651  0.722942
1600  0.855599  0.835711
1605  0.931922  0.918279
1610  1.000000  1.000000
1615  0.993938  0.994631
1620  0.990559  0.987500
1625  0.933298  0.932127
1630  0.879297  0.878240
1635  0.863832  0.857780
1640  0.842239  0.834729
1645  0.867815  0.859401
1650  0.893320  0.882876
1655  0.892712  0.894704
1660  0.839853  0.904971
1665  0.771605  0.848830
1670  0.690387  0.792455
1675  0.606945  0.685860
1680  0.528699  0.578332
1685  0.445688  0.468272
1690  0.366310  0.359075
1695  0.289841  0.286564
1700  0.226845  0.214266
1705  0.166283  0.171699
1710  0.126591  0.128638
1715  0.086297  0.101239
1720  0.065866  0.073910
1725  0.045501  0.057965
1730  0.035759  0.042407
1735  0.026495  0.034093
1740  0.022138  0.025856
1745  0.017731  0.021480
1750  0.014650  0.017093
1755  0.011559  0.014145
1760  0.009057  0.011192
1765  0.006659  0.009015
1770  0.005161  0.006875
1775  0.003671  0.005480
1780  0.003050  0.004121
1785  0.002424  0.003379
1790  0.001918  0.002650
1795  0.001428  0.002264
1800  0.001428  0.001878
