<h2>AAS 97-136</h2>
<h2>MULTIBODY MODELING OF COMMUNICATIONS SATELLITE DYNAMICS  FOR GROUND-BASED SIMULATIONS                                                            </h2>
<h4>  J. E. Cochran, Jr., Y-M Cheng, S. Cho and S. Yoon, Auburn University J. M. Kim, Electronics and Telecommunications Research Institute, Korea                            </h4>
<h2> Abstract </h2>
 This paper addresses the problem of developing an attitude dynamics module for a  ground-based simulation of a communications satellite.  To meet this requirement,  par of a multi-body dynamics code written by the second author to model missile  launcher dynamics has been used.  The multi-body core of the previously developed  program has been greatly improved and used to model the dynamics of Koreasat by  treating it as a collection of rigid and flexible bodies.  Representative models  are included in a test simulation to validate the dynamics module.  Results  otained during the process of development will be presented.