GOES Imager IR Weighting Functions

Which one is different?

WV channel is NOT a window channel--it doesn't sense the surface, only the atmosphere itself or high/deep clouds.

Weighting function peaks about one optical depth into the fluid; i.e. the WF peak moves up in moister atmospheres and down in dryer atmosperes, but it still doesn't see the surface, except possibly for mountains.

In this instance, the "half-power" points are about 350 mb and 650 mb, and the peak is about 450 mb.