If rgsc is run with no command line arguments or with a ? or "help", a brief description with a list of command line arguments and current parameter values is printed and the program exits.
CDNORTH and CDSOUTH should be set to the pathnames of the root directories of the two volumes of the GSC CD-ROMs. If there is only one drive, set both to that drive's pathname and swap CD-ROMs as needed; rgsc will fail gracefully if it cannot find the regions it is looking for on the current disk.
Output for each source found is of the format:
region.source RA Dec Magnitude Class Number [Plate(s)]
where the position format is controlled by the -deg, -hms, -col, and -tab switches.