Table4.2.10.191 https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-2-10-191.shtml IRTSEC Seconds Prior To Initial Reference Time (Defined In Section 1) s MOSF Meridional Overturning Stream Function m3 s-1 DSLOBS Days Since Last Observation d