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Comparison Continued
Note the obvious differences between thermal IR (usually just called IR) and water vapor IR (usually just called water vapor) images from the same satellite at the same time
     Infrared has more discrete areas of clouds; water vapor is more continuous
     It is easy to tell from thermal IR the cloud top temperature; water vapor is more ambiguous
     The presence of the polar front jet is easy to see in water vapor imagery, even without the presence of a comma cloud or baroclinic leaf