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Terrain Mapping
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. Description Optical contour matching The Goodyear Aircraft Corporation ATRAN (''Automatic Terrain Recognition And Navigation'') system for the MGM-13 Mace was the earliest known TERCOM system. In August 1952, Air Materiel Command initiated the mating of the Goodyear ATRAN with the MGM-1 Matador. This mating resulted in a production contract in June 1954. ATRAN was difficult to jam and was not range-limited by line-of sight, but its range was restricted by the availability of radar maps. In t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cruise Missile
A cruise missile is an unmanned self-propelled guided missile that sustains flight through aerodynamic lift for most of its flight path. Cruise missiles are designed to deliver a large payload over long distances with high precision. Modern cruise missiles are capable of traveling at high Aerodynamics#Incompressible aerodynamics, subsonic, Supersonic speed, supersonic, or Hypersonic speed, hypersonic speeds, are self-navigating, and are able to fly on a non-Ballistics, ballistic, extremely low-altitude trajectory. History The idea of an "aerial torpedo" was shown in the British 1909 film ''The Airship Destroyer'' in which flying torpedoes controlled wirelessly are used to bring down airships bombing London. In 1916, the Americans, American Aircraft pilot, aviator Lawrence Sperry built and patented an "aerial torpedo", the Hewitt-Sperry Automatic Airplane, a small biplane carrying a TNT charge, a Sperry autopilot and barometric altitude control. Inspired by the experiments, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spy Satellite
A reconnaissance satellite or intelligence satellite (commonly, although unofficially, referred to as a spy satellite) is an Earth observation satellite or communications satellite deployed for military or intelligence applications. The first generation type (i.e., Corona and Zenit) took photographs, then ejected canisters of photographic film which would descend back down into Earth's atmosphere. Corona capsules were retrieved in mid-air as they floated down on parachutes. Later, spacecraft had digital imaging systems and downloaded the images via encrypted radio links. In the United States, most information available about reconnaissance satellites is on programs that existed up to 1972, as this information has been declassified due to its age. Some information about programs before that time is still classified information, and a small amount of information is available on subsequent missions. A few up-to-date reconnaissance satellite images have been declassifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kh-55
The Kh-55 (, also known as RKV-500; NATO reporting name: AS-15 "Kent") is a Soviet/Russian subsonic air-launched cruise missile, designed by MKB Raduga in the 1970s. It has a range of up to 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-555 appears 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'' (SS-N-21"Sampson" and SSC-X-4"Slingshot") designed by NPO Novator. The RK-55 is very similar to the air-launched Kh-55 (AS-15 "Kent") but the Kh-55 has a drop-down turbofan engine and was designed by MKB Raduga. Development In the late 1960s, the "Ekho" study conducted by the GosNIIAS institute concluded that it would be more effective to deploy many small, subsonic cruise missiles than the much more expensive supersonic missiles then in favo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C-602
The YJ-62 () is a Chinese subsonic land-attack and anti-ship cruise missile. It is manufactured by the China Aerospace Science and Industry Corporation Third Academy. Description In a September 2014 article published in Joint Forces Quarterly, the YJ-62 is credited with a warhead, a speed of , and a sea-skimming terminal attack height of ; The missile has an inertial guidance system using GPS and BeiDou data, and an active terminal sensor. A 2017 China Maritime Studies Institute (CSMI) report credits the active radar seeker with an acquisition range of . In 2015, the United States Navy's Office of Naval Intelligence considered the YJ-62 to have longer range than the of the C-602 export version, Figures of at least 400 km have been given. The 2017 CSMI report notes that such long range suggests that the missile receives targeting from other platforms. YJ-62A is credited with a range of up to . C-602 The C-602 is the export version of the YJ-62, claimed to have a ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BGM-109 Tomahawk
The BGM-109 Tomahawk () Land Attack Missile (TLAM) is an American long-range, all-weather, jet-powered, Subsonic flight, subsonic cruise missile that is primarily used by the United States Navy and Royal Navy in ship and submarine-based land-attack operations. Developed at the Applied Physics Laboratory of Johns Hopkins University under James H. Walker near Laurel, Maryland, the Tomahawk emerged in the 1970s as a modular cruise missile first manufactured by General Dynamics. The Tomahawk aimed to fulfill the need for a medium- to long-range, low-altitude missile with diverse capabilities. Its modular design allows for compatibility with a range of warheads, including high-explosive, submunitions, and bunker-busters. The Tomahawk can use a variety of guidance systems, including Global Positioning System, GPS, Inertial navigation system, inertial navigation, and TERCOM, terrain contour matching. Over a dozen variants and upgraded versions have been developed since the original desi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AGM-129 ACM
The AGM-129 ACM (Advanced Cruise Missile) was a low-observable, subsonic, turbofan-powered, air-launched cruise missile originally designed and built by General Dynamics and eventually acquired by Raytheon Missile Systems. Prior to its withdrawal from service in 2012, the AGM-129A was carried exclusively by the US Air Force's B-52H Stratofortress bombers. Early development In 1982 the US Air Force began studies for a new cruise missile with low-observable characteristics after it became clear that the AGM-86B cruise missile would have difficulty penetrating future air defense systems. The AGM-86B relied on low-altitude flight to penetrate the Soviet air defense system centered on surface to air missiles. The deployment of the airborne early warning systems, together with the Zaslon PESA radar on MiG-31 and Myech radar on Su-27 interceptors, all three " look-down/shoot-down" radars, reduced the likelihood that the low-altitude AGM-86B would reach its target. The soluti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AGM-86
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-52G and B-52H Stratofortress strategic bombers, allowing the aircraft to deliver its payload from a great distance. The missile dilutes an enemy's forces ability to respond and complicates air defense of its territory. The concept started as a long-range drone aircraft that would act as a decoy, distracting Soviet air defenses from the bombers. As new lightweight nuclear weapons emerged in the 1960s, the design was modified with the intent of attacking missile and radar sites at the end of its flight. Further development extended its range so much that it emerged as a weapon allowing the B-52s to launch their attacks while still well outside Soviet airspace, saturating their defenses with hundreds of tiny, low-flying targets that were extremely difficult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supersonic Low Altitude Missile
The Supersonic Low Altitude Missile or SLAM was a U.S. Air Force nuclear weapons project conceived around 1955, and cancelled in 1964. SLAMs were conceived of as unmanned nuclear-powered ramjets capable of delivering thermonuclear warheads deep into enemy territory. The development of ICBMs in the 1950s rendered the concept of SLAMs obsolete. Advances in defensive ground radar also made the stratagem of low-altitude evasion ineffective. Although it never proceeded beyond the initial design and testing phase before being declared obsolete, the design contained several radical innovations as a nuclear delivery system. Conceived role The SLAM was designed to complement the doctrine of mutually assured destruction and as a possible replacement for, or augment to, the Strategic Air Command system. In the event of nuclear war it was intended to fly below the cover of enemy radar at supersonic speeds and deliver thermonuclear warheads to roughly 16 targets. Innovations The use of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Positioning System
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geopositioning. A satellite navigation system with global coverage is termed global navigation satellite system (GNSS). , four global systems are operational: the United States's Global Positioning System (GPS), Russia's Global Navigation Satellite System (GLONASS), China's BeiDou Navigation Satellite System (BDS), and the European Union's Galileo. Two regional systems are operational: India's NavIC and Japan's QZSS. ''Satellite-based augmentation systems'' (SBAS), designed to enhance the accuracy of GNSS, include Japan's Quasi-Zenith Satellite System (QZSS), India's GAGAN and the European EGNOS, all of them based on GPS. Previous iterations of the BeiDou navigation system and the present Indian Regional Navigation Satellite System (IRNSS), operationally known as NavIC, are examples of stand-alone operating regional navigation satellite systems (RNSS). Satellite navigation devices d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Radar Homing
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 passive radar, receiver) 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 (code word), Fox Three. Advantages There are two major advantages to active radar homing: * As the missile is tracking the target it is going to be much closer to the target than the launching platform during the terminal phase, thus the missile's tracking can be much more accurate and better resistant to electronic countermeasures. Active radar homing missiles have some of the best kill probability, kill probabilities, along with missiles employing track-via-missile guidance. * Because the missile is totally autonomous during the terminal phase, the launch platform does not need to have its radar enabled at all during this phase, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OTR-23 Oka
The OTR-23 Oka (; named after Oka River) was a mobile theatre ballistic missile () deployed by the Soviet Union near the end of the Cold War to replace the obsolete SS-1C 'Scud B'. It carried the GRAU index 9K714 and was assigned the NATO reporting name SS-23 Spider. The introduction of the Oka significantly strengthened Soviet theatre nuclear capabilities as its range and accuracy allowed it not only to strike hardened NATO targets such as airfields, nuclear delivery systems, and command centers, but moving targets as well. It also had a fast reaction time, being able to fire in approximately five minutes, and was nearly impossible to intercept, thereby allowing it to penetrate defenses. Development During the mid-1960s the Soviets began developing a replacement for the R-17 Elbrus (NATO reporting name: SS-1C Scud B), which had some serious drawbacks including slow launching time, dangerous fuel, and poor accuracy. After starting with some design concepts in 1965−1971, d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS-12 Scaleboard
The TR-1 Temp (, Temp-S, meaning 'Speed') was a mobile theatre ballistic missile developed and deployed by the Soviet Union during the Cold War. It was assigned the NATO reporting name SS-12 Scaleboard and carried the industrial designation 9M76 and the GRAU index 9К76. A modified version was initially identified by NATO as a new design and given the SS-22 reporting name, but later recognized it as merely a variant of the original and maintained the name Scaleboard. The Temp entered service in the mid-1960s. The TR-1 was designed as a mobile weapon to give theatre commanders nuclear strike capability. The weapon used the same mobile launcher ( MAZ-543) as the R-17 Elbrus missile but had an environmental protective cover that split down the middle and was only opened when the missile was ready to fire. All were decommissioned in 1988–1989 as part of the INF treaty banning such weapons. Operators ;: The Soviet Armed Forces were the only operator of the TR-1 Temp. It was also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
