Longwave IR Window Channel (10.7 micron)

Thick Stratus/Fog Emissivity (Page 5 of 10)

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A conceptual representation of the interaction between infrared radiation at 10.7 microns and thick stratus cloud A GOES-8 10.7 micron longwave infrared channel image of a stratus cloud deck

A typical stratus cloud or fog is opaque to earth-emitted infrared energy, thus the satellite senses radiation emitted from cloud top. Since these clouds have an emissivity of almost 1 at 10.7 microns, the brightness temperature sensed by the satellite can be used to estimate cloud top temperature.

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