FILTYP

     FILTYP is the filter type. Valid input are NONE, LIGHT and HEAVY.

     A LIGHT filter will smooth the data to allow a mesoscale analysis.
     A HEAVY filter will smooth the data to only a large scale analysis.
     A filter of NONE will not smooth the data.

     Only the wind data and the virtual potential temperature are
     filtered to aid in the computation of the derivatives needed
     for the shear and Scorer parameter calculations.