Pershing II Weapon System - Pershing Professionals Organization

2-4. TYPICAL OPERATION - CONTINUED.COVERFigure 2-4. Typical Positioning of Containers for Missile Assembly(EL Tractor to Curbside of EL)2-5. TYPICAL TRAJECTORY.A typical PI1 missile trajectory is shown in figure 2-5. The three trajectory phases are:a. Boost Phase. This phase occurs from lift-off until the end of powered flight. During this time the PACcontrols:0 First stage separation after burnout0 Second stage ignition0 Second stage separation and thrust termination0 Steering and guidance.b. Midcourse Phase. This phase occurs from the end of powered flight (thrust termination) until reentry to theatmosphere. During this time, the PAC controls the vane control system (VCS) and reaction control system(RCS). These aid guidance of the reentry vehicle (RV).c. Terminal Phase. This phase starts at atmospheric reentry and continues until warhead detonation. ThePAC compares stored target data with data obtained from radar. Using this target data comparison, the PACcontrols the RV fins for final guidance.