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Read in hourly emission files

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I'm using WRF-Chem to simulation regional air pollution, and I use hourly emission files which are linked as:
wrfchemi_00z_d01 and wrfchemi_12z_d01
Each of these two files contain 12 hourly emissions, and I want daily emissions to stay the same (read the same files).

How should I set the namelist? Right now I'm doing:
auxinput5_interval_m = 86400
io_form_auxinput5 = 2

However, in the running log files (rsl.out.*), I only see the history of reading the first hour emission:

mediation_integrate: med_read_wrf_chem_emissions: Open file wrfchemi_00z_d01
mediation_integrate: med_read_wrf_chem_emissions: Read emissions for time 2014-01-01_00:00:00

But there is no history like that for wrfchemi_12z_d01 or for other hours. How do I make sure the emission file is read by WRF-Chem every hour?

Thank you very much in advance!

You will need to set the interval to match 1 hour (because you have emission values every hour), so:
auxinput5_interval_m = 60

Note that this value must be in minutes, not seconds.