Super typhoon Haiyan makes landfall
Super typhoon Haiyan
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The Spectral Responses - Vegetation System

Last measurements before flight...

The following tables represent spectral response values for each of the spectral bands.
Full camera measurements after integration are available for B0 (Blue), B2(Red), B3(Near Infrared) and B4(SWIR) : they were obtained in October 1996 during the vacuum tests of the entire instrument and are the last ones before the flight of the instrument. No other measurement of spectral response is planned...

Compared to the previous ones, they are slightly better, especially for the blue band which shows higher response for lower wavelength.

All spectral responses are presented on the following figure :

Spectral responses

The following tables give the relative contribution to the energy measurement of the spectral bands for each wavelength (sum of all contributions for each spectral band equals 1.00) assuming constant spectral illumination.. (A text file is also available)

B0 (Blue)
Wavelength Relative response Wavelength Relative response
415 0,000 460 0,122
420 0,001 465 0,119
425 0,005 470 0,112
430 0,020 475 0,099
435 0,043 480 0,066
440 0,066 485 0,028
445 0,086 490 0,009
450 0,103 495 0,003
455 0,117 500 0,001
B2 (Red)
Wavelength Relative response Wavelength Relative response
580 0,000 690 0,097
590 0,000 700 0,060
600 0,001 710 0,032
610 0,020 720 0,016
620 0,076 730 0,007
630 0,102 740 0,003
640 0,107 750 0,001
650 0,112 760 0,001
660 0,119 770 0,000
670 0,125 780 0,000
680 0,121  
B3 (NIR)
Wavelength Relative response Wavelength Relative response
730 0,000 850 0,082
740 0,001 860 0,080
750 0,004 870 0,077
760 0,014 880 0,070
770 0,033 890 0,053
780 0,054 900 0,028
790 0,070 910 0,012
800 0,079 920 0,005
810 0,083 930 0,002
820 0,083 940 0,001
830 0,083 950 0,001
840 0,083 960 0,000
B4 (SWIR)
Wavelength Relative response Wavelength Relative response
1520 0,000 1670 0,095
1530 0,001 1680 0,085
1540 0,001 1690 0,061
1550 0,002 1700 0,035
1560 0,003 1710 0,020
1570 0,006 1720 0,013
1580 0,012 1730 0,008
1590 0,024 1740 0,005
1600 0,043 1750 0,003
1610 0,070 1760 0,002
1620 0,092 1770 0,001
1630 0,103 1780 0,001
1640 0,106 1790 0,001
1650 0,105 1800 0,001
1660 0,103