It then opens the table and adds all columns except the wavelength and error columns to the list. If a throughput column is parameterized, it removes the parameter value before adding it to the list. The substitution is done repeatedly, so iraf logicals in the directory file can be defined in terms of other iraf logicals. This task uses four environment variables to control its access to the database. These variables define the location of the Sybase and stdb executables and libraries.
All information is read from the database and the throughput tables.
The argument to mkcomptab is the name of the output file.