IMAGE Spacecraft Dynamics Tapley, M. IMAGE's Radio Plasma Imager (RPI) antenna system includes four wire antennas of length 250 meters (initially), deployed and held extended from the core body by centrifugal force. The attitude control system on image consists only of an electromagnetic torque rod, the polarity of which is switched in phase with the spin rate to act against the Earth's magnetic field to add angular momentum to the core body. During the in-orbit checkout and deployment phase of IMAGE, there was an unanticipated forced precession of the core body driven by the spin-plane wire antennas of the radio plasma imager. After the initial deployment of approximately 120 meters of each wire, the wire spin axis and the core body spin axis were parallel. At the next perigee pass, the torque rod drove the core body to a new spin axis, at which point the interaction of the wires with the core body became manifest. The core body was essentially driven in a forced gyroscopic precession about the normal to the wire spin plane. The wire angular momentum was also driven, but because the wires contained the vast majority of the system angular momentum, the wire spin plane moved much more slowly than the core body. A second, and much slower, motion of the spin axis became apparent during the past year, as the spin axis moved relative to the orbit normal. Gravity gradient torques on the antenna spin plane are believed to be driving this motion. We analyze and describe these system motions, and describe what is being done to achieve the desired spin orientation for IMAGE. _______________ To be presented at the Magnetospheric Imaging Workshop, Yosemite National Park, California, U.S.A., Feb. 5-8, 2002.