uPROBLEM: Interpolate surface pressure along a flight
track from FNMOC
surface pressure files which cover CONUS every 6 hours and are in GRiB format.
uINPUT: foray and track name, path to GRiB files; OUTPUT: new
data file in foray
Pa to mb, GRiB reader, 3D interpolation
uCONSTRAINTS: Must interface with existing database
uUSERS: Myself, members of my Branch