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Modify interval between metgrid output files

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Can you please tell me if there is an option to set the metgrid output files interval? For now, the interval is the same as the interval of the input data:
interval_seconds = 3600 will result in hourly metgrid files. Is there a way to set the interval higher (e.g. daily) such that I will have less but larger metgrid files (i.e., instead of 24 metgrid files per day with 1MB I would like to have 1 metgrid file per day with ~24 MB). I couldn't find it in the documentation.

Thank you very much!
If I've understood correctly, you would like to write several time periods to the same metgrid file, similarly to what can be done with the WRF "frames_per_outfile" option. Unfortunately, the metgrid program is only able to write one netCDF file per time period.