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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 ...
Since the missile is typically being launched after the target was detected using a powerful radar system, it makes sense to use that same radar system to track the target, thereby avoiding problems with resolution or power, and reducing the weight of the missile. Semi-active radar homing (SARH) is by far the most common "all weather" guidance ...
This problem is avoided in the semi-active radar homing (SARH) concept. In these systems, the ground station still illuminates the target with its radar, but the receiver is on the missile. The reflection of the original signal off the target produces another cone-like beam, but one that is narrowest at the target.
This combined both a radar transmitter and receiver in the missile, making it unnecessary for the pilot to keep the aircraft aimed at the target after firing the missile, [18] unlike Semi-active radar homing (SARH) missiles which require continuous radar-assisted guidance throughout flight. This allowed the aircraft that fired the AAM-N-3 to ...
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.
The missile, designated R-23, entered service in January 1974, the SARH version as the R-23R, the IR version R-23T. The R-23R, weighing 222 kg (489 lb), used a monopulse radar which gave it better ECM resistance compared to the AIM-7E-2.
The Talos missile also had surface-to-surface capabilities. [8] The RGM-8H Talos-ARM was a dedicated anti-radar homing missile for use against shore-based radar stations. Initial testing of the RGM-8H was performed in 1965, and soon after, it was deployed in Vietnam on Chicago, Oklahoma City, and Long Beach, attacking North Vietnamese SAM radars.
This leads to one of the most common types of radar-based missile guidance, semi-active radar homing, or SARH. This places a small receiver in the nose of the missile that listens for the signals reflected off the target, and therefore grows more accurate and powerful as the missile approaches the target.