The current plane metadata is roughly:
position: ICRS (deg)
energy: (barycentric) wavelength (m)
time: MJD UTC (d)
polarization: list of states
These coordinate/reference systems and units are now listed in the "interoperable profile".
However, the CADC TAP service also provides some energy columns with frequency values because the typical query cannot be re-written in a way that can be (easily) indexed...
In principle, one could specify places to put values with alternate representations. This is most obvious for wavelength/frequency/energy/velocity, less so for position (icrs/other epochs/galactic?), and then maybe time frames....
The current plane metadata is roughly:
position: ICRS (deg)
energy: (barycentric) wavelength (m)
time: MJD UTC (d)
polarization: list of states
These coordinate/reference systems and units are now listed in the "interoperable profile".
However, the CADC TAP service also provides some energy columns with frequency values because the typical query cannot be re-written in a way that can be (easily) indexed...
In principle, one could specify places to put values with alternate representations. This is most obvious for wavelength/frequency/energy/velocity, less so for position (icrs/other epochs/galactic?), and then maybe time frames....