Here is a good place to start:
Mr Paradigmoia..... apparent means not real
One have to use those formulas only if is using a completely different type of measurement (two narrow bands) that we use from space satellites in order to recalculate the actual (total) emissivity of the terrain ( and discover nice things like military installations ).
You seem unable to understand that or most probably you don't want to!
No more food for Trolls here babe !