Table 1. AVHRR Channels

Channel          Wavelength
 Number            (m)                            Primary Use
-------         ------------         -----------------------------------------
   1            0.58  -  0.68         Daytime cloud and surface mapping and
                                       normalized vegetation index
   2            0.725 -  1.10         Surface water delineation and normalized
                                       vegetation index
   3            3.55  -  3.93         Cloud mapping
   4           10.3   - 11.3          SST (sea surface temperature) and
                                       day/night cloud mapping
   5           11.5   - 12.5          SST