3, channel 3 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at  http://ntrs.nasagov/search.jsp?R=19760014184
Number of data points:
47
Wavenumber (cm-1)   Filter response
      666.134000       0.000000
      667.359000       0.001486
      669.805000       0.003584
      671.634000       0.004189
      673.780000       0.007090
      676.089000       0.012302
      677.512000       0.023022
      678.327000       0.033799
      679.158000       0.047675
      679.696000       0.063904
      680.104000       0.084796
      680.973000       0.136654
      681.864000       0.193160
      682.763000       0.251216
      683.557000       0.318584
      684.487000       0.382838
      685.612000       0.455602
      686.461000       0.503585
      687.278000       0.545369
      687.807000       0.590281
      688.415000       0.620458
      688.645000       0.635940
      689.151000       0.645970
      689.779000       0.649788
      690.345000       0.641208
      690.740000       0.628768
      691.369000       0.602353
      691.705000       0.578291
      692.318000       0.548777
      693.053000       0.513049
      694.221000       0.472631
      694.819000       0.440017
      695.178000       0.420604
      695.745000       0.381791
      696.410000       0.332117
      696.915000       0.280907
      697.549000       0.225034
      697.765000       0.176952
      698.551000       0.121065
      699.196000       0.067517
      700.250000       0.034860
      701.246000       0.020814
      703.325000       0.010543
      704.983000       0.007288
      707.698000       0.002385
      710.885000       0.000538
      715.602000       0.000000