Table 4.11 https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-11.shtml Successive times processed have same forecast time, start time of forecast is incremented. Successive times processed have same start time of forecast, forecast time is incremented. Successive times processed have start time of forecast incremented and forecast time decremented so that valid time remains constant. Successive times processed have start time of forecast decremented and forecast time incremented so that valid time remains constant. Floating subinterval of time between forecast time and end of overall time interval.(see Note 1) Missing