/usr/share/eccodes/definitions/mars/grib.esmm.em.def is in libeccodes-data 2.0.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #assert(local=31)
alias mars.fcmonth = forecastMonth;
unalias mars.step;
alias mars.date = referenceDate;
|