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Track-via-missile or TVM refers to a missile guidance technique which combines features of semi-active radar homing (SARH) and radio command guidance.This avoids the problems with terminal accuracy normally seen by command guided missiles, especially at long range.
Retransmission homing, also called "track-via-missile" or "TVM", is a hybrid between command guidance, semi-active radar homing and active radar homing. The missile picks up radiation broadcast by the tracking radar which bounces off the target and relays it to the tracking station, which relays commands back to the missile.
BAT radar guided bomb RBS-15F anti-ship missile (on right) under the wing of a JAS 39 Gripen fighter, 2007 Active radar homing missile seeker. Active radar homing (ARH) is a missile guidance method in which a missile contains a radar transceiver (in contrast to semi-active radar homing, which uses only a receiver) and the electronics necessary for it to find and track its target autonomously.
Semi-active radar homing (SARH) is a common type of missile guidance system, perhaps the most common type for longer-range air-to-air and surface-to-air missile systems. The name refers to the fact that the missile itself is only a passive detector of a radar signal—provided by an external ("offboard") source—as it reflects off the target [1] [2] (in contrast to active radar homing, which ...
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.
Electronics in the missile then keep it centered in the beam. It differs from semi-active radar homing (SARH) and semi-active laser homing (SALH) in which the target is illuminated by a powerful emitter, and a sensor in the head of missile detects the reflected emissions and directs it to the target.
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 monopulse receiver in the missile's nose receives the reflection of illumination energy from the target. The track-via-missile uplink sends this data through an antenna in the missile's tail back to the AN/MPQ-65 set. In the ECS, computers calculate the maneuvers that the missile should perform in order to maintain a trajectory to the ...