Add a medium parameter to WaveCoord.coord
Allows to indicate if the coordinate array of a WaveCoord object must be returned in air or vacuum, convertion is automatic according to the CTYPE. Raises a ValueError if the conversion is not possible.
Allows to indicate if the coordinate array of a WaveCoord object must be returned in air or vacuum, convertion is automatic according to the CTYPE. Raises a ValueError if the conversion is not possible.