Smithsonian Astrophysical Observatory, Cambridge, MA, USA
This code has been modified under the terms listed below and is made
available under the same terms.

Copyright (C) 1996 Schwartz Computer Consulting Services

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation, and that the name of SCCS not be used in advertising or
publicity pertaining to distribution of the software without specific,
written prior permission.  SCCS makes no representations about the
suitability of this software for any purpose.  It is provided "as is"
without express or implied warranty.