Movesmrg must be run after Met4moves and MOVES and before Mrggrid.
Movesmrg must be run three times to compute on-roadway and off-network (including vapor venting) emissions processes individually, since the emission rate calculation methods in SMOKE for these categories are quite different. Once all three emissions processes have been computed, the emission output files can be merged (optionally along with other 2-D sectors separate from onroad) using Mrggrid which combines any number of 2-D or 3-D hourly, gridded, and speciated emission data files.
For its RPD and RPV (but not RPP) lookup table calculations, Movesmrg uses the gridded hourly temperatures in GMT, and then adjusts the hour of the RPD and RPV lookup tables from local time to GMT to get the emission rates for the reference county for the appropriate month. The key lookup fields for the factors are hourly temperature and average speed for the RPD lookup table calculation, and hourly temperature and hour of the day in local time for the RPV table calculation.
For its RPP (but not RPD or PPV) lookup table calculations, Movesmrg uses the RPP lookup table as an input file for the emission rates that depend not on the gridded hourly temperatures, but on the temperature profiles output by Met4moves. The emissions estimates based on the RPP table are computed for the temporal averaging period specified for the temperature profiles, rather than using hourly gridded meteorology.