/usr/share/eccodes/definitions/mars/grib.swmm.fcmean.def is in libeccodes-data 2.6.0-2.
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 7 8 9 | alias mars.fcmonth = marsForecastMonth;
alias mars.number = perturbationNumber;
unalias mars.step;
alias mars.method = methodNumber;
if (class is "od") { alias mars.system = systemNumber; }
if (class is "me") { alias mars.system = systemNumber; }
if (class is "en") { alias mars.system = systemNumber; }
|