grb1to2.pl

v1.0 5/2014: first public release for CPASW 2014 based on opn_grib1to2.pl
v1.1 5/2014: fixed Mercator conversion: dx and dy in meters instead of km
v1.2 8/2014: fix to make -grid_templates work
v1.3 2/2015: fix to make -gmerge work
v1.4 7/2015  added -anl option in cases where grib1 does specify
             if data is anl or fcst, requires new grib1to2_metadata.pl
             requires wgrib2 v2.0.3+ for negative forecast hours
v1.4 11/2015 updated grib1to2_metadata.pl
v1.5 12/2015 removed references to $HOME and $home, now auxillary files must be in same directory
              as grb1to2.pl.

v1.5.1 9/2016  global_template.g2 modified with valid Code Table 4.3
               eliminates warning: ** WARNING input Code Table 4.3 = 255 (undefined) **
               changed error message from "mkfifo failed" to "mkfifo failed - directory write protected?"
               note: did not update ftp site with new grb1to2.pl (change not worthy of site update)

v1.5.2 10/2018  for global gaussian grids, make dlon more precise (360/$nx) instead of grib1 value.
                so that GrADS will identify field as global (nlon * dlon = 360).  Note: top Gaussian
                lat is still grib1 value (xx.xxx precision). 
                Need to decide whether to improve precision for all fields

		grib1to2_metadata.pl  (called by grb1to2.pl)

v1.7 1/2021     wgrib2 v3.0.1 can be compiled to use ECMWF names, need to run grb1to2.pl using
                ncep names.

8/2021		update grib1_metadata.pl for CLWMR (grib1) for NARR
		with wgrib2 v3.0.0+, translat CLWMR -> CLLMR

# 3/14/2011 - make the grib1 > grib2 metadata converter into a perlscript
# v1.0
# 3/2014: copied grib1to2_meta.pl to grib1to2_metadata.pl, this version
#         retains earth, radius, center, subcenter and process id of grib file
#         introduced with grib1to2_v3.pl
# 4/2/2014: set BVF2, PV___ to IMGD
# 4/3/2014: valid XX-YYhr -> XX-YY hour ave fcst, T=XXXK, added dot for XXX.XXK, PREIX -> IMGD
#           MAXVIG XX hr fcst -> GRPL (XX-1)-XX hour max fcst
# 4/8/2014 RERRVAR -> REV
# 1/13/2016: old ecmwf Z (m**2/s**2) -> HGT (m)
#                this is wrong now ecmwf Z -> GP
#                ecmwf GH (m) -> HGT (m)
# 1/19/2016: added ens mean, ens spread, ENS=xxx
# 4/7/2016: added ECMWF: 10U 10V 2T
# 9/7/2016: added ECMWF: 2D  (2 meter dewpoint temperature)
# 6/22/2017: added ECMWF: R, W, MSL, SP, TCC
# 11/21/2017: added support for minutes time units

7/2023	v1.7.1  bug fix, -wgrib2 wgrib2_executable doesn't work