Bugfix: Correct definitions of NCEP grid numbers 172 and 220

[JohnHalleyGotway]

Describe the Task

Issue NOAA-EMC/NCEPLIBS-w3emc#157 corrects the definition of NCEP Grid 172 and 220.

Once that issue has been fixed, those changes should be migrated to the MET library code. Specifically, look in src/libcode/vx_grid/find_grid_by_name.h at:

   { "G172", 'S', -60.0, -36.866, -139.806, 0.0,  0.0, -100.0,  12.7,   ncep_earth_radius_km,  690,  710 },
   { "G220", 'S', -60.0, -36.866, -139.806, 0.0,  0.0, -100.0,  25.4,   ncep_earth_radius_km,  345,  355 },

Those are the lines that will eventually change.

Time Estimate

2 hours

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[JohnHalleyGotway]

These commands demonstrate the problem in MET:

for GRID in `echo "G172 G220"`; do
   bin/regrid_data_plane GFS.grb2 ${GRID} ${GRID}.nc -field 'name="LAND";level="Z0";'
   bin/plot_data_plane ${GRID}.nc ${GRID}.ps 'name="LAND_Z0"; level="(*,*)";'
done

Rerunning the commands above after updating the grid definitions based on comments in NOAA-EMC/NCEPLIBS-w3emc#157 fixes the problem, as seen here:

[malloryprow]

@JohnHalleyGotway These look great! Ahhh what a relief to see them correct!