FOC Instrument Science Report 063 "The FOCSIM Beginner's Manual - 8/92 by W. Hack Abstract excerpted from the report: This manual introduces a user to the FOC simulator FOCSIM which runs under IRAF on some UNIX systems and the VAX science cluster at STScI. The manual starts with a discussion of how FOCSIM was designed to work and what calculations FOCSIM was designed to perform. It then proceeds to walk the user through simple simulation explaining in some detail the necessary procedures to run and the nature of the parameters FOCSIM expects as input. Upon completing the first simulations, some of the more advanced uses of FOCSIM is discussed briefly. The appendices include examples of FOCSIM's output products as well as listings of the source object spectral catalogs available to FOCSIM.
