The program is written in standard C and has been compiled on the CRAY, Alpha, SGI, SUN, HP, Amiga, MS-DOS (gcc) with using the standard source code. The program does not handle spectral files nor files with complex packing. The program can be compiled to either use the NCEP operational GRIB tables or the NCEP/NCAR Reanalysis GRIB table as the default table in cases of ambiguity. Information includes range of values, grid type, etc. In addition the program can produce a non-inventory description of the GRIB records. The output formats of wgrib include: text, binary (system dependent), big endian IEEE and GRIB. The inventories can be manipulated to select the records to decode. There are three types of inventories (regular, short, and verbose) which can be viewed as a human-readable index file. The command wgrib both inventories and decodes GRIB-1 files.
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