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Input

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