dprofile:
   Program extracts a profile at a given position.
   You must specify a longitude, latitude pair and
   at least one filename

   Usage: dprofile lon lat files...

   Fields to extract are set in extract files 
   ( extract.daily, extract.weekly etc etc)

   Required files:
   regional.grid.[ab]
   regional.depth.[ab]
   + input files of daily, restart or weekly type