This file generated: 15/10/2019
README file for NIMBUS-6 HIRS filter functions
April 24th, 2013
Data are extracted from HIRS_filters.pdf file using a digitizing software named engauge (http://digitizer.sourceforge.net/)
PDF pages are converted to png images (kpdf), digitized (engauge) and saved to csv files and imported to a xls file.
Original SRF plots are dated November/December 1972
Original PDF file HIRS_filters.pdf was provided by Ronald Glumb (ITT Exelisinc),
file should be available at http://ntrs.nasagov/search.jsp?R=19760014184
This HIRS instrument has 17 channels (16 IR, 1 VIS)
Page one of the PDF file mentions (all cm-1):
Filter set cent. Freq HalfBW
1 Proto 669.1 2.8
2 Flight-2 678.8 13.7
3 Proto 690.1 12.6
4 Flight-1 701.6 15.9
5 Fligt-1 716.5 17.5
6 Flight-1 732.3 17.6
7 Proto 749.1 18.4
8 Flight-2 899.6 34.6
9 Flight-1 1228.2 63.4
10 Flight-2 1494.9 87.6
11 Flight-1 2190.8 20.6
12 Proto 2211.9 22.5
13 Flight-1 2244.2 21.6
14 Flight-1 2274.5 35.2
15 Flight-1 2357.6 23.0
16 Proto 2692.4 296.9
17 Proto 14443.0 892.2
Central frequency and bandwidth calculated from the digitised data are slightly
different but in good agreement, see filter function section
We used the option --central-wv-method CENTROID to calculate the central frequency
Download all SRFs: rtcoef_nimbus_6_hirs_srf.tar.gz
|
Channel 01 Central wavenumber/wavelength: 668.815 cm-1 / 14.952 microns Comment: 1, channel 1 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch01.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch01.png |
|
|
Channel 02 Central wavenumber/wavelength: 679.009 cm-1 / 14.727 microns Comment: 2, channel 2 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch02.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch02.png |
|
|
Channel 03 Central wavenumber/wavelength: 689.759 cm-1 / 14.498 microns Comment: 3, channel 3 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch03.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch03.png |
|
|
Channel 04 Central wavenumber/wavelength: 701.389 cm-1 / 14.257 microns Comment: 4, channel 4 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch04.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch04.png |
|
|
Channel 05 Central wavenumber/wavelength: 716.733 cm-1 / 13.952 microns Comment: 5, channel 5 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch05.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch05.png |
|
|
Channel 06 Central wavenumber/wavelength: 732.093 cm-1 / 13.659 microns Comment: 6, channel 6 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch06.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch06.png |
|
|
Channel 07 Central wavenumber/wavelength: 749.125 cm-1 / 13.349 microns Comment: 7, channel 7 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch07.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch07.png |
|
|
Channel 08 Central wavenumber/wavelength: 899.741 cm-1 / 11.114 microns Comment: 8, channel 8 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch08.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch08.png |
|
|
Channel 09 Central wavenumber/wavelength: 1222.936 cm-1 / 8.177 microns Comment: 9, channel 9 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch09.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch09.png |
|
|
Channel 10 Central wavenumber/wavelength: 1493.738 cm-1 / 6.695 microns Comment: 10, channel 10 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch10.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch10.png |
|
|
Channel 11 Central wavenumber/wavelength: 2190.396 cm-1 / 4.565 microns Comment: 11, channel 11 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch11.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch11.png |
|
|
Channel 12 Central wavenumber/wavelength: 2211.983 cm-1 / 4.521 microns Comment: 12, channel 12 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch12.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch12.png |
|
|
Channel 13 Central wavenumber/wavelength: 2243.968 cm-1 / 4.456 microns Comment: 13, channel 13 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch13.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch13.png |
|
|
Channel 14 Central wavenumber/wavelength: 2273.024 cm-1 / 4.399 microns Comment: 14, channel 14 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch14.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch14.png |
|
|
Channel 15 Central wavenumber/wavelength: 2357.189 cm-1 / 4.242 microns Comment: 15, channel 15 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch15.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch15.png |
|
|
Channel 16 Central wavenumber/wavelength: 2692.356 cm-1 / 3.714 microns Comment: 16, channel 16 digitised from file HIRS_filters.pdf provided by Ronald Glumb (ITT Exelisinc) at http://ntrs.nasagov/search.jsp?R=19760014184 SRF data: rtcoef_nimbus_6_hirs_srf_ch16.txt SRF plot: rtcoef_nimbus_6_hirs_srf_ch16.png |
|