Handling of collections of time series is analogous to handling collections of vertical profiles, described above. The choices of

1. a single interpolated time axis (using the default, GT=@LIN, regridding)

2. a super-set of all times axis (using "exact match," GT=@XACT, regridding)

should be considered. Choice 3, in which time would be handled as an independent variable, is possible, but awkward, due to the multiplicity of time encodings.