2 Operating Instructions

ASTROM is run by means of the following command

All the parameters are optional, and may appear in any order. The parameters input and report default to astrom.dat and astrom.lis; the summary defaults to the terminal. If log or fits is not specified, no corresponding file is generated. A parameter can be defaulted either by leaving it out or by using a pair of double-quotes. The specifiers input= and report= are optional; if they are omitted, they are assigned to the first and second unqualified filenames. Thus

would read the input file astrom.input, and write a report on the default astrom.lis.

reads astrom.input, and produces its report on astrom.report, plus a number of FITS files with names beginning wcsout (see Section 4 below). The specifiers input=- and report=- cause the input to be read from, and the report to be written to, the standard input and output respectively.

A summary report normally appears on the command terminal, but can be sent to a file by giving the file’s name as the summary= parameter. This should be monitored and any reference stars with large residuals noted. The input file can then be edited as necessary and the job rerun. Finally, the report file can be printed in the normal way. An example report file is reproduced in Appendix B. For further details on the log and FITS files, see Section 4.