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Terrain contour matching, or TERCOM, is a navigation system used primarily by cruise missiles. It uses a contour map of the terrain that is compared with measurements made during flight by an on-board radar altimeter. A TERCOM system considerably increases the accuracy of a missile compared with inertial navigation systems (INS). The increased accuracy allows a TERCOM-equipped missile to fly closer to obstacles and at generally lower altitudes, making it harder to detect by ground radar.
The cruise missiles that employ a TERCOM system include:
A cruise missile is an unmanned self-propelled guided vehicle that sustains flight through aerodynamic lift for most of its flight path and whose primary mission is to place an ordnance or special payload on a target. Cruise missiles are designed to deliver a large warhead over long distances with high precision. Modern cruise missiles are capable of traveling at high subsonic, supersonic, or hypersonic speeds, are self-navigating, and are able to fly on a non-ballistic, extremely low-altitude trajectory.
The TomahawkLand Attack Missile (TLAM) is a long-range, all-weather, jet-powered, subsonic cruise missile that is primarily used by the United States Navy and Royal Navy in ship and submarine-based land-attack operations.
Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missile's target accuracy is a critical factor for its effectiveness. Guidance systems improve missile accuracy by improving its Probability of Guidance (Pg).
The Kh-55 is a Soviet/Russian subsonic air-launched cruise missile, designed by MKB Raduga in the 1970s. It has a range of up to 2,500 km (1,350 nmi) and can carry nuclear warheads. Kh-55 is launched exclusively from bomber aircraft and has spawned a number of conventionally armed variants mainly for tactical use, such as the Kh-65SE and Kh-SD, but only the Kh-101 and Kh-555 appear to have been put into service. The Kh-55 was not the basis of the submarine and ground-launched S-10 Granat or RK-55 Relief designed by NPO Novator. The RK-55 is very similar to the air-launched Kh-55 but the Kh-55 has a drop-down turbofan engine and was designed by MKB Raduga.
The North American Aviation AGM-28 Hound Dog was a supersonic, turbojet-propelled, nuclear armed, air-launched cruise missile developed in 1959 for the United States Air Force. It was primarily designed to be capable of attacking Soviet ground-based air defense sites prior to a potential air attack by B-52 Stratofortress long range bombers during the Cold War. The Hound Dog was first given the designation B-77, then redesignated GAM-77, and finally AGM-28. It was conceived as a temporary standoff missile for the B-52, to be used until the GAM-87 Skybolt air-launched ballistic missile was available. Instead, the Skybolt was cancelled within a few years and the Hound Dog continued to be deployed for a total of 15 years until its replacement by newer missiles, including the AGM-69 SRAM and then the AGM-86 ALCM.
Active radar homing (ARH) is a missile guidance method in which a missile contains a radar transceiver and the electronics necessary for it to find and track its target autonomously. The NATO brevity code for an air-to-air active radar homing missile launch is fox three.
The AGM-86 ALCM is an American subsonic air-launched cruise missile (ALCM) built by Boeing and operated by the United States Air Force. This missile was developed to increase the effectiveness and survivability of the Boeing B-52H Stratofortress strategic bomber. The missile dilutes an enemy's forces and complicates air defense of its territory.
An air-to-surface missile (ASM) or air-to-ground missile (AGM) is a missile designed to be launched from military aircraft at targets on land or sea. There are also unpowered guided glide bombs not considered missiles. The two most common propulsion systems for air-to-surface missiles are rocket motors, usually with shorter range, and slower, longer-range jet engines. Some Soviet-designed air-to-surface missiles are powered by ramjets, giving them both long range and high speed.
The Hsiung Feng IIE is a surface-to-surface land-attack cruise missile system developed by the National Chung-Shan Institute of Science and Technology (NCSIST) in Taiwan.
The Babur, is an all-weather, subsonic cruise missile developed and designed by the National Defence Complex (NDC) of Pakistan.
A land-attack missile (LAM) is a naval surface-to-surface missile that is capable of effectively attacking targets ashore, unlike specialized anti-ship missiles, which are optimized for striking other ships. Some dual-role missiles are suitable for both missions.
The P-270 Moskit is a Soviet supersonic ramjet powered anti-ship cruise missile. Its GRAU designation is 3M80, air launched variant is the Kh-41 and its NATO reporting name is SS-N-22 Sunburn. The missile system was designed by the Raduga Design Bureau during the 1970s as a follow-up to the P-120 Malakhit. The Moskit was originally designed to be ship-launched, but variants have been adapted to be launched from land, underwater (submarines) and air, as well as on the Lun-class ekranoplan. The missile can carry conventional and nuclear warheads. The exact classification of the missile is unknown, with varying types reported. This uncertainty is due to the secrecy surrounding an active military weapon. The missile has been purchased and exported to the People's Liberation Army Navy (China) and Egyptian Navy (Egypt).
The Kh-25/Kh-25M is a family of Soviet lightweight air-to-ground missiles with a modular range of guidance systems and a range of 10 km. The anti-radar variant (Kh-25MP) is known to NATO as the AS-12 'Kegler' and has a range up to 40 km. Designed by Zvezda-Strela, the Kh-25 is derived from the laser-guided version of the Kh-23 Grom. The Kh-25 remains in widespread use despite the apparent development of a successor, the Kh-38.
The Kh-59 Ovod is a Russian cruise missile with a two-stage solid-fuel propulsion system and 200 km range. The Kh-59M Ovod-M is a variant with a bigger warhead and turbojet engine. It is primarily a land-attack missile; the Kh-59MK variant targets ships.
Guidance, navigation and control is a branch of engineering dealing with the design of systems to control the movement of vehicles, especially, automobiles, ships, aircraft, and spacecraft. In many cases these functions can be performed by trained humans. However, because of the speed of, for example, a rocket's dynamics, human reaction time is too slow to control this movement. Therefore, systems—now almost exclusively digital electronic—are used for such control. Even in cases where humans can perform these functions, it is often the case that GNC systems provide benefits such as alleviating operator work load, smoothing turbulence, fuel savings, etc. In addition, sophisticated applications of GNC enable automatic or remote control.
The CJ-10 is a second-generation Chinese land-attack cruise missile. It is derived from the Kh-55 missile. It is reportedly manufactured by the China Aerospace Science and Industry Corporation Third Academy and the China Haiying Electro-Mechanical Technology Academy.
The SSM-700K C-Star (Haeseong) is a ship-launched sea-skimming surface-to-surface anti-ship cruise missile developed by the South Korean Agency for Defense Development (ADD), LIG Nex1 and the Republic of Korea Navy in 2003. The missiles are deployed on KDX-II and KDX-III destroyers as of 2006, each carrying 8 and 16 of the missiles respectively, and on Ulsan-class frigates.
The YJ-22 is a LACM development of the anti-ship C-802 with a 400 km range, and possible Satellite guidance/terrain mapping guidance currently said to be under development, Initial Operational Capability was expected after 2005. This 135-kilometer range system would be the first Chinese cruise missile to incorporate BeiDou Navigation Satellite System-assisted navigation. Satellite-aided guidance could be augmented by terrain contour matching TERCOM guidance. Some sources believe BeiDou-aided navigation could result in cruise missiles like the YJ-22 to achieve accuracies of up to 10 meters.
The Mobin is an Iranian multi-purpose ground-launched unmanned aerial vehicle (UAV). The UAV was first displayed on 27 August 2019 at the MAKS air show held at Zhukovsky International Airport, Russia. The Mobin is the first UAV of its kind in the world, designed to penetrate enemy defenses and get past incoming missiles. The UAV entered service in Iran in 2018 and had been cleared for export.