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Preset guidance is the simplest type of missile guidance. From the distance and direction of the target, the trajectory of the flight path is determined. Before firing, this information is programmed into the missile's guidance system, which, during flight, maneuvers the missile to follow that path.
Missile Guidance Speed Image RIM-7 Sea Sparrow: Semi-active radar homing: Mach 4: RIM-66 Standard: Command midcourse and Terminal Semi-active radar homing: Mach 3.5: FIM-92 Stinger: Infrared homing: Mach 2.54: MIM-104 Patriot: Command midcourse and Terminal Semi-active radar homing: Mach 5: RIM-116 Rolling Airframe Missile: Infrared homing ...
The Guidance Replacement Program replaces the NS20A Missile Guidance Set with the NS50 Missile Guidance Set. The newer system extends the service life of the Minuteman missile beyond the year 2030 by replacing aging parts and assemblies with current, high reliability technology while maintaining the current accuracy performance.
The program was scrapped in the early 1990s at the end of the Cold War, but elements of it live on in today's Missile Defense Agency, which oversees the ground-based midcourse defense system.
Command guidance is a type of missile guidance in which a ground station or aircraft relay signals to a guided missile via radio control or through a wire connecting the missile to the launcher and tell the missile where to steer to intercept its target. This control may also command the missile to detonate, even if the missile has a fuze.
Typically the missile is steered with a joystick, and its path is observed through a periscope-type telescopic sight. The missiles are usually equipped with a magnesium flare in the base that automatically ignites on launch and allows the gunner to visually track the fast-moving missile in a manner similar in concept to tracer ammunition.
The guidance system operates while the missile is in alert status, thus enabling the missile to be launched in less than one minute. Once the missile is launched, the guidance system cannot be changed or affected from the ground, a feature which prevents enemy interference with the planned trajectory of the missile.
The missile travels attain a peak speed of Mach 17, or one mile every five seconds. A Dark Eagle battery has four trailer-based launchers carrying two canistered missiles apiece.