Returns datetimes giving start and end times in the OMNI/Qin-Denton data
The update function in toolbox retrieves all available hourly Qin-Denton data, and this function accesses that and looks up the start and end times, returning them as datetime objects.
Parameters: | dbase : string (optional)
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Returns: | omnirange : tuple
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Examples
>>> import spacepy.omni as om
>>> om.omnirange()
(datetime.datetime(1963, 1, 1, 0, 0), datetime.datetime(2011, 11, 30, 23, 0))
>>> om.omnirange(dbase='OMNI2hourly')
(datetime.datetime(1963, 1, 1, 0, 0), datetime.datetime(2011, 11, 30, 23, 0))