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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 Martin B-57 Canberra is an American-built, twin-engined tactical bomber and reconnaissance aircraft that entered service with the United States Air Force (USAF) in 1953. The B-57 is a license-built version of the British English Electric Canberra, manufactured by the Glenn L. Martin Company. Initial Martin-built models were virtually identical to their British-built twinjet counterparts; Martin later modified the design to incorporate larger quantities of US-sourced components and produced the aircraft in several variants.
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.
The AGM-12 Bullpup is a short-range air-to-ground missile developed by Martin Marietta for the US Navy. It is among the earliest precision guided air-to-ground weapons and the first to be mass produced. It first saw operational use in 1959 on the A-4 Skyhawk, but soon found use on the A-6 Intruder, F-100 Super Sabre, F-105 Thunderchief, F-4 Phantom II, F-8 Crusader, and P-3 Orion in both Navy and US Air Force service, as well as NATO allies. The weapon was guided manually via a small joystick in the aircraft cockpit, which presented a number of problems and its ultimate accuracy was on the order of 10 metres (33 ft), greater than desired. In the 1960s it was increasingly supplanted by fully automatic weapons like the AGM-62 Walleye and AGM-65 Maverick.
The Martin MGM-1 Matador was the first operational surface-to-surface cruise missile designed and built by the United States. It was developed after World War II, drawing upon their wartime experience with creating the Republic-Ford JB-2, a copy of the German V-1. The Matador was similar in concept to the V-1, but it included a radio command that allowed in-flight course corrections. This allowed accuracy to be maintained over greatly extended ranges of just under 1000 km. To allow these ranges, the Matador was powered by a small turbojet engine in place of the V-1's much less efficient pulsejet.
Ground-directed bombing (GDB) is a military tactic for airstrikes by ground-attack aircraft, strategic bombers, and other equipped air vehicles under command guidance from aviation ground support equipment and/or ground personnel. Often used in poor weather and at night, the tactic was superseded by an airborne computer predicting unguided bomb impact from data provided by precision avionics Equipment for radar GDB generally included a combination ground radar/computer/communication system and aircraft avionics for processing radioed commands.
The 1st Combat Evaluation Group was a Strategic Air Command (SAC) unit. It was formed on 1 August 1961 to merge the 3908th Strategic Standardization Group for SAC aircrew evaluation with the 1st Radar Bomb Scoring Group that had originated from the 263rd Army Air Force Base Unit which transferred from 15th AF to directly under Strategic Air Command c. 1946. The 1CEVG formed after SAC switched to low-level tactics to counter Soviet surface-to-air missiles and SAC had "developed a Radar Bomb Scoring field kit for use in NIKE Systems" in early 1960 for scoring SAC training missions against US Hercules SAM sites. The 1CEVG headquarters included an Office of History and a "standardization and evaluation school" for command examiners.
The Reeves AN/MSQ-77 Bomb Directing Central, Radar was a United States Air Force automatic tracking radar/computer system for command guidance of aircraft. It was often used during Vietnam War bomb runs at nighttime and during bad weather. Developed from the Reeves AN/MSQ-35, the AN/MSQ-77 reversed the process of Radar Bomb Scoring by continually estimating the bomb impact point before bomb release with a vacuum tube ballistic computer. Unlike "Course Directing Centrals" which guided aircraft to a predetermined release point, the AN/MSQ-77 algorithm continuously predicted bomb impact points during the radar track while the AN/MSQ-77's control commands adjusted the aircraft course. A close air support regulation prohibited AN/MSQ-77 Combat Skyspot bombing within 1,000 yd (910 m) of friendly forces unless authorized by a Forward Air Controller, and "on several occasions" strikes were as close as 273 yd (250 m).
Radar Bomb Scoring is a combat aviation ground support operation used to evaluate Cold War aircrews' effectiveness with simulated unguided bomb drops near radar stations of the United States Navy, the USAF Strategic Air Command, and Army Project Nike units. USAF RBS used various ground radar, computers, and other electronic equipment such as jammers to disrupt operations of the bomber's radar navigator, AAA/SAM simulators to require countermeasures from the bomber, and Radar Bomb Scoring Centrals for estimating accuracy of simulated bombings. Scores for accuracy and electronic warfare effectiveness were transmitted from radar sites such as those at Strategic Range Training Complexes.
The Reeves AN/MSQ-35 Bomb Scoring Central was a United States Air Force dual radar system with computerized plotting board. It was used by the 1st Combat Evaluation Group to evaluate the accuracy of Strategic Air Command bomber crews.
Combat Skyspot was the ground-directed bombing (GDB) operation of the Vietnam War by the United States Air Force using Bomb Directing Centrals and by the United States Marine Corps using Course Directing Centrals. Combat Skyspot's command guidance of B-52s and tactical fighters and bombers—"chiefly flown by F-100's"—at night and poor weather was used for aerial bombing of strategic, close air support, interdiction, and other targets. Using a combination radar/computer/communications system at operating location in Southeast Asia, a typical bombing mission had an air command post turn over control of the mission to the radar station, and the station provided bomb run corrections and designated when to release bombs.
Reeves Instrument Corporation (RICO) was a Cold War manufacturer of computer and radar systems for the United States. The corporation was the Project Cyclone laboratory operator for simulation of guided missiles, and RICO developed several Strategic Air Command combination (radar/computer/communications) systems.
The AN/MPQ-2 Close Cooperation Control Unit was a truck-mounted pautomatic tracking radar/computer/communication system for aircraft command guidance, e.g., missile tracking, and for Radar Bomb Scoring. It was introduced shortly after the end of World War II. For ground directed bombing (GDB), an operator would manually plot a target on the "Blind Bombing Plotting Sheet", then use the manual "E6B computer and bombing tables" to plot the release point for striking the target, after which a radar operator used the AN/MPQ-2 to acquire a track of the bomber near an initial point during which allowed ground control of the bomb run to the release point.
The Western Electric M-33 Antiaircraft Fire Control System was an X-Band "Gunfire Control Radar", for aiming antiaircraft artillery by computer control. Developed for mobility via 3 trailers, the "M-33 system could compute, for the 90-mm. and 120-mm. guns, firing data for targets with speeds up to 1,000 mph", and for targets at 120,000 yards had similar gun laying accuracy as "SCR-584 type radars" at 70,000 yards. The system included a telescopic "target selector" on a tripod near the guns for additional measurement of aircraft "azimuth and elevation data [to] be transmitted to the computer and utilized as gun directing data."
The AN/TPQ-2 Close Air Support System was a post-World War II radar/computer/communications system for automatically tracking an aircraft and guiding it to a predetermined bomb release point. The system was the predecessor of the General Electric AN/MPQ-14 Course Directing Central deployed to the Korean War for ground-directed bombing.
Matador Automatic Radar Control (MARC) was a command guidance system for the Martin MGM-1 Matador ground launched cruise missile that used combination radar/computer/communication centrals for ground-directed bombing. As for the earlier ground central used with the X-10 aircraft,* MARC had an "Air Link" from the ground for control and an airborne AN/APW-11A radar transponder on the missile for ranging. A series of "MSQ sites". each with a mobile AN/MSQ-1A central in 3 vans had an automatic tracking radar to geolocate the Matador up to ~600 nmi. MARC provided command guidance during the "mid-course phase" after Matador/MARC contact was established following the missile launch off the Zero Length Launcher and until an MSQ transmitted the dive ("dump") command to start the flight path toward the target. Originating in the Caltech/Martin "ZEL Project" and developed as part of weapon system "Project MX 771" at the "Air Force Missile Test Center, Cocoa, Florida"; MARC had accuracy at "crossover into enemy territory" of ~500 ft (150 m) and—at an AN/MSQ-1A range of 165 nautical miles —a CEP of 2,700 ft (820 m).
The Reeves AN/MSQ-51 Aerial Target Control Central (ATCC) was a combination radar/computer/communications system developed 1961-3 for United States Navy "aerial target out-of-sight control". In addition to the "Target Control System AN/SRW-4D" with radios and "Antenna Assemblies for Target Control and Communications ", the ATCC included acquisition/surveillance and tracking radars, a Mark X IFF/SIF, and an analog computer. The ATCC's automatic tracking radar was derived from the Western Electric M-33 gun laying radar and could process double-pulse 9340-9370 MHz beacon returns from transponders up to 400,000 yd away from the AN/MSQ-51 transmitting 9215-9285 MHz radar pulses. If an ATCC was equipped with a "Telemetry Receiving Station", IRIG channels 5-14 could also be received from QF-9G and Q-2C unmanned aerial vehicles. Other ATCC-controlled drones included the QF-9F, KDA-1, KDA-4, KDB-1 and KD2R-5. For "RF communications " to command the drone was a "Collins Radio Co. Model 618T-3" Single Sideband Transceiver (SST) with Control Unit 714E-2 for 28,000 channels. The 1000 watt voice radio system had 2 UHF AN/GRC-27 sets "with Control-Indicator 6-806/GR" for 1750 channels
The 3903rd Radar Bomb Scoring Group was a military evaluation unit under direct command of Strategic Air Command (SAC) headquarters for scoring simulated bomb runs using automatic tracking radar stations. Initially an Army Air Forces Base Unit (AAFBU) and then a squadron, the 3903rd RBS Group was personnel, assets, and detachments were redesignated the 1st Radar Bomb Scoring Group and then the 1CEVG Radar Bomb Scoring Division when the RBS Group merged with the 3908th Strategic Standardization Group in 1961, the year RBS Express trains began to be used for low-altitude Boeing B-52 Stratofortress operations..
The General Electric AN/TPQ-1O Course Directing Central was a light-weight, two-unit, helicopter transportable, ground based bombing system developed for use by the United States Marine Corps to provide highly accurate, day/night all weather close air support. This self-contained system was designed to guide an aircraft, equipped with the proper control equipment, to a release point for accurate all-weather delivery of ordnance and supplies to a preselected target. The AN/TPQ-10 and its operators were known as an ‘’Air Support Radar Team’’ (ASRT) and were employed by the Marine Air Support Squadrons within the Aviation Combat Element.
References
- ↑ http://radar.tpub.com/TM-11-487C-1/TM-11-487C-10445.htm ""Close Support Control Set AN/MSQ-1 directs aircraft for close-support bombing missions, provides information for bomb scoring, and guides and records the flight of guided missiles. Guidance is accomplished by transmitting coded radar pulses to the aircraft or missile, or by transmitting voice or coded pulses to the pilot. For communication with the pilot, the VHF transmitting and receiving equipment of Communications Central AN/GSC-1 is used. The AN/MSQ-1 [Trailer V-38] and Radar Set AN/MPS-9 [in Trailer K-78] are used together. ["Power Units (not supplied)]"
- ↑ Article title
- ↑ [ dead link ]
- ↑ "3903rd Radar Bomb Scoring Group" (KoreanWar Bulletin Board). KoreanWar.org. Retrieved 2012-05-20.
Major Bennett was my uncle and responsible for my having spent 30 great years in the USAF. He was stationed at Mac Dill AFB, Florida with an RBS unit in 1947… 52…until…53 … On the MSQ-1, we operated in the same manner, but later learned [for the MSQ-2] that we should have entered the target coordinates into the new digital/analog computer, AND THEN 'ZEROED' THEM OUT AGAIN. The computer would remember the offset and track accordingly. Unfortunately, we did not know that without the TO's. By leaving them in, like the 584, we effectively located the target's position over the top of ourselves. … Det. 12…McClellan AFB, Sacramento, Calif. This was previously Det. D and moved here from Spokane, Wash. It was located at a radio site about 4 miles S.E. of the base near Fair Oaks, in farms and orchards. I was stationed here about 1951 to 1952. Some personnel there were Capt. Wallace Fry, C.O., WOJG William Johnson, 1st Sgt. Sadler, Nelson Vaughn, William Morris, Horvath, Burdick, Wallace and Fox. It was from here that several detachments were marshalled that went to Korea. … was discharged in 1956 at Manhattan Beach Air Force Station on Long Island. … 1 May 70 - 1 May 74…Jim Cooper…statesboro, matagorda, cedar key,udorn, linebacker, quinter, park, presque isle, ashland, wellington, altus, hollis
- ↑ Operational Suitability Test of the RB-57A Aircraft (Interim Report: Project No. APG/TAT/122-A). Vol. DTIC AD-046 931. Eglin AF Base, Fla: Air Proving Ground Command. 4 May 2000 [14 September 1954].
Radar contact was frequently lost by the ground station when the aircraft was in banks of 15-20 degrees or more. This was attributed to the location of the [AN/APS-11A transponder] antennae on the aircraft. … All drops consisted of three bombs individually released with the aircraft intended to be directly over the target when the second bomb exploded. Bursting altitudes were computed for one-half of release altitude. … The RB-57A is suitable for night photographic reconnaissance when operating within range of either ground radar or Shoran installations
- ↑ LMSD-1 Radar Command Guidance System (abstract), Lockheed Aircraft Corp, 1957, retrieved 2013-04-02– via Google Books,
A study was initiated in April 1955 to determine the most practicable command guidance system for the XQ-5 Target developmental flight-test program. Three such systems were considered: the system then in use on the X-7A Ramjet Test Vehicle; the system being developed under the X-7A contract using the (AN/APW-11) coding compatible with the MSQ-1 Command Guidance Station; and the Sperry Microwave Command Guidance System. From the initial studies it was determined that the system used on the X-7A Vehicle was the only one that could be made available in time for incorporation into the first three experimental targets.
- ↑ Citation 11 at https://fas.org/spp/military/program/6555th/6555C2-1.htm