NOTE:  The Prairie Grass experiment included several "special observations", such as
mixing height, u*, w* and L.  These observations are contained in the PG.DAT file.
The PGRSURF.222 surface met input file in this folder incorporates these special 
observations, and the model outputs contained in the AERMOD folder are generated
based on these met inputs.  The NOSPECOB.SFC file in this folder contains the 
AERMET surface file generated without inclusion of these special observations.
AERMOD model performance in comparable between these two sets of met inputs.

RWB
