<h2>AAS 95-323</h2><h2>Operational Use of Swingby-an Interactive Trajectory Design and Maneuver Planning Tool - for Mission to the Moon and Beyond</h2><h4>J. Carrico, D. Conway and  D. Ginn, Computer Sciences Corporation, Lanham-Seabrook, MD, D. C. Folta and K. V. Richon, Goddard Space Flight Center, Greenbelt, MD</h4><h2> Abstract </h2>The National Aeronautics and Space Administration/Goddard Space Flight Center Flight Dynamics Division (FDD) has used the PC-based program Swingby to support missions to the Moon and the interior Sun-Earth/Moon Lagrange point.  Swingby facilitates rapid turnaround of mission support products; for example, the Flight Dynamics Facility used Swingby to deliver more than 55 maneuver plans during the first 8 days of the Clementine mission.  This productivity is a result of the rapid graphical and numeric feedback Swingby provides to mission analysis.  This paper describes the use of the Swingby system for missions to the Moon and Sun-Earth/Moon Lagrange points.<br><br>