Preface

In the 7 years that have elapsed since the first version of this manual was distributed, there have been numerous changes in the SU package. These changes have been a result of both in-house activities here at CWP and, equally important, to the many contributions of code, bug fixes, extensions, and suggestions from SU users outside of CWP. After reviewing these many changes and extensions, and after much discussion with members of the worldwide SU user community, it has become apparent that a new manual was necessary.

This new version began in preparation for a short course on SU at the CREWES project at the University of Calgary. Many of the items that were in the original manual, such as information about obtaining and installing the package, have been have been moved to appendices. Additional sections describing the core collection of programs have been added. The entire manual has been expanded to include more detailed descriptions of the codes.

The intent is that you will be able to find your way around the package, via the help mechanisms, that you will learn to run the programs by running the demos, and finally will be able to see how to begin writing SU code, drawing on the source code of the package.