This PR adds CellFileCollection, CellFileCollectionStack, and SwathFileCollection classes to src/read_native/ragged_array_ts.py, defining methods for dealing with multifile collections of ASCAT data using xarray, as well as an xarray_io.py file which defines reader/writer classes for specific ASCAT products that can be used by the Collections in ragged_array_ts.py.
This PR adds CellFileCollection, CellFileCollectionStack, and SwathFileCollection classes to src/read_native/ragged_array_ts.py, defining methods for dealing with multifile collections of ASCAT data using xarray, as well as an xarray_io.py file which defines reader/writer classes for specific ASCAT products that can be used by the Collections in ragged_array_ts.py.