Two input files may be used (in addition to the basic guide star
catalogue). The first is a catalogue file. This is
a list of target names and positions in the format used by the WHT (see
``Observers' Guide, pp 35-36). It will normally be the catalogue used at
the telescope. Note that apparent coordinates have the equinox of the
date of observation. The second is a command file. This is a
list of commands identical in format to an interactive terminal session.
An example might look like:
CONFIG WHT CASS CATALOGUE TABBY.CAT ROTATOR 90 SOURCE SIAMESE ROTATOR 0 SOURCE ALLEY