Epoch to Time/Datetime from attribute metadata

[smangham]

Not quite sure if this is standard, but: It would be useful if we could get a function to convert an epoch into Astropy Time/Datetime by parsing the format from its metadata (e.g. if it has the attribute FORM_PTR: CDF_TIME_TT2000), then using the cdf_tt2000 Astropy format automatically.

So something like CDFAstropy.convert_to_astropy(cdf_file['Epoch'], attributes=cdf_file.varattsget('Epoch')). Or just adding a method to the CDF file itself e.g. cdf_file.to_astropy_time('Epoch').

[dstansby]

Definitely keen for this, PRs welcome 😄