The user can choose among various options for doing the coordinate transformation. The output table will contain the computed coordinates. This table can be used as standard stars table in case a multi step astrometric calibration is needed.

`ASTROMET/COMPUTE` computes the RA,Dec coordinates from X,Y
coordinates directly from the transformation parameters, while it
obtains X,Y from the RA,Dec ones in an iterative manner. Also
note that the equinox of the computed coordinates is the same as the
standard star catalogue (which is NOT necessarily the same as
its epoch) and is 2000.0 in case the PPM catalogue is used.