arlmet.archives.Archive.step

Archive.step: ClassVar[Timedelta]

The time between one time step and the next inside a file, as a pandas.Timedelta: the spacing of the file’s index records, the product’s own time resolution. It is not how much time one file covers (the file span). HRRR has a step of 1 hour and its files hold 6 time steps, a 6-hour block. NAM 12 km has a step of 3 hours and its files hold 8 time steps, 00:00 to 21:00 of a calendar day, so a file’s last time step is one step before the file’s end, and a run that reaches past 21:00 needs the next day’s file.

See also

arlmet.File.times

The valid times of the time steps in one file.

Archive.paths_for_range

The archive paths that cover a time range.

Archive.start_date

The earliest date in the archive.

Examples

>>> from arlmet.archives import ARCHIVES, get_archive
>>> ARCHIVES["nam12"].step
Timedelta('0 days 03:00:00')
>>> get_archive("hrrr").step
Timedelta('0 days 01:00:00')