4, channel 4 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 Number of data points: 59 Wavenumber (cm-1) Filter response 670.874000 0.000000 675.270000 0.001342 677.701000 0.004338 679.522000 0.005813 682.105000 0.008804 685.299000 0.013316 686.380000 0.019456 687.327000 0.030236 688.303000 0.048741 689.299000 0.072654 690.188000 0.108933 690.776000 0.145224 691.554000 0.192324 692.323000 0.237107 692.679000 0.292722 693.009000 0.341385 693.314000 0.383095 693.912000 0.422476 694.553000 0.473444 695.332000 0.520545 696.081000 0.559920 696.671000 0.596983 697.550000 0.630172 698.246000 0.654869 699.067000 0.672608 699.566000 0.684951 700.371000 0.698054 701.144000 0.702660 701.884000 0.697996 702.460000 0.690247 703.020000 0.677863 703.697000 0.656204 704.348000 0.627591 704.711000 0.602853 705.514000 0.574235 706.105000 0.529400 707.014000 0.488416 707.488000 0.452856 707.954000 0.414980 708.711000 0.374001 709.454000 0.329160 709.923000 0.292056 710.521000 0.248766 711.149000 0.213973 711.498000 0.185373 711.861000 0.160635 712.381000 0.137436 712.906000 0.115782 713.709000 0.087164 714.249000 0.069372 715.088000 0.050797 716.242000 0.035300 717.560000 0.023659 718.888000 0.014337 720.988000 0.009620 723.098000 0.007220 726.868000 0.003984 730.487000 0.000754 734.871000 0.000000