Launch site | Vandenberg Space Force Base, California, US | ||||||||
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Location | 34°48′16″N120°32′46″W / 34.804329°N 120.546165°W | ||||||||
Short name | OSTF | ||||||||
Operator | United States Air Force | ||||||||
Launch pad(s) | 3 | ||||||||
Launch history | |||||||||
First launch | 1960 | ||||||||
Last launch | 1965 | ||||||||
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The Operational Silo Test Facility (OSTF) is a former United States Air Force intercontinental ballistic missile launch facility at Vandenberg Space Force Base, California, United States. It was a developmental launch site for the silo-based Titan and Atlas missile series. [1]
The site was originally constructed for Titan I tests. On 12 December 1960, a fully fueled Titan was lifted to the surface in preparation for launch when the silo elevator collapsed. The missile fell back down into the silo and exploded, damaging the facility so badly that it was abandoned. The first launch of a silo-based missile would take place 1,200 feet (370 m) to the northwest inside the Silo Launch Test Facility (SLTF). [2]
The OSTF complex also included silos for launching Atlas E and F missiles; coffin types for the former and elevator types for the latter. [3] Atlas testing began rather ignominiously when Missile 27E exploded at liftoff on 7 June 1961, putting OSTF-1 (also designated Site F or 576 Foxtrot) [3] out of use for seven months. The facility went on to host another nine Atlas E launches before being decommissioned in 1966. [3]
Operational tests were designed as practice drills for ballistic missile crews and also engineering tests of the missile and silo equipment—they would travel to Vandenberg Air Force Base and launch a randomly selected missile from the inventory, which was then equipped with telemetry and Range Safety destruct packages. Some launches tested reentry vehicles or Nike-Zeus target missiles.
OSTF-2 (also designated Site G or 576 Golf) [4] hosted seven Atlas F launches between 1962 and 1965. This facility received its own baptism of fire on 4 October 1963 when Missile 45F tipped over at liftoff after one engine failed to start. Damage to the silo was not that serious and it hosted the final Atlas R&D flight two months later. Then on 2 April 1964, a repeat disaster happened when Missile 3F failed in virtually identical fashion to 45F. This time OSTF-2 was not used again for six months, after which it hosted the finale Atlas ICBM test, Missile 106F, on 8 January 1965 and was then decommissioned from service. [4]
An intercontinental ballistic missile (ICBM) is a ballistic missile with a range greater than 5,500 kilometres (3,400 mi), primarily designed for nuclear weapons delivery. Conventional, chemical, and biological weapons can also be delivered with varying effectiveness, but have never been deployed on ICBMs. Most modern designs support multiple independently targetable reentry vehicle (MIRVs), allowing a single missile to carry several warheads, each of which can strike a different target. The United States, Russia, China, France, India, the United Kingdom, Israel, and North Korea are the only countries known to have operational ICBMs. Incidentally, Pakistan is the only nuclear-armed state that does not possess ICBMs.
Titan was a family of United States expendable rockets used between 1959 and 2005. The Titan I and Titan II were part of the US Air Force's intercontinental ballistic missile (ICBM) fleet until 1987. The space launch vehicle versions contributed the majority of the 368 Titan launches, including all the Project Gemini crewed flights of the mid-1960s. Titan vehicles were also used to lift US military payloads as well as civilian agency reconnaissance satellites and to send interplanetary scientific probes throughout the Solar System.
The SM-65 Atlas was the first operational intercontinental ballistic missile (ICBM) developed by the United States and the first member of the Atlas rocket family. It was built for the U.S. Air Force by the Convair Division of General Dynamics at an assembly plant located in Kearny Mesa, San Diego.
Vandenberg Space Force Base, previously Vandenberg Air Force Base, is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.
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Titan IV was a family of heavy-lift space launch vehicles developed by Martin Marietta and operated by the United States Air Force from 1989 to 2005. Launches were conducted from Cape Canaveral Air Force Station, Florida and Vandenberg Air Force Base, California.
The Titan Missile Museum, also known as Air Force Facility Missile Site 8 or as Titan II ICBM Site 571-7, is a former ICBM site located about 40 km (25 mi) south of Tucson, Arizona in the United States. It was constructed in 1963 and deactivated in 1984. It is now a museum run by the nonprofit Arizona Aerospace Foundation and includes an inert Titan II missile in the silo, as well as the original launch facilities.
Space Launch Complex 3 (SLC-3) is a launch site at Vandenberg Space Force Base that consists of two separate launch pads. SLC-3E (East) was used by the Atlas V launch vehicle before it was decommissioned in August 2021 with the final launch taking place on November 10, 2022 at 09:49, while SLC-3W (West) has been demolished.
Space Systems Command (SSC) is the United States Space Force's space development, acquisition, launch, and logistics field command. It is headquartered at Los Angeles Air Force Base, California, and manages the United States' space launch ranges.
The 576th Flight Test Squadron is a United States Air Force unit assigned to Air Force Global Strike Command. The 576th is stationed at Vandenberg Space Force Base, California. The unit was first established in January 1943 as the 576th Bombardment Squadron. After training with Consolidated B-24 Liberators in the United States, the squadron deployed to the European Theater of Operations, where it participated in the strategic bombing campaign against Germany. The squadron was awarded a Distinguished Unit Citation for its actions in an attack on Gotha, Germany in February 1944. Following V-E Day, the squadron returned to the United States and was inactivated. It was again active between September 1947 and November 1949 in the reserve, but does not appear to have been fully manned or equipped with tactical aircraft at this time.
The SM-65D Atlas, or Atlas D, was the first operational version of the U.S. Atlas missile. Atlas D was first used as an intercontinental ballistic missile (ICBM) to deliver a nuclear weapon payload on a suborbital trajectory. It was later developed as a launch vehicle to carry a payload to low Earth orbit on its own, and later to geosynchronous orbit, to the Moon, Venus, or Mars with the Agena or Centaur upper stage.
The SM-65E Atlas, or Atlas-E, was an operational variant of the Atlas missile. It first flew on October 11, 1960, and was deployed as an operational ICBM from September 1961 until April 1966. Following retirement as an ICBM, the Atlas-E, along with the Atlas-F, was refurbished for orbital launches as the Atlas E/F. The last Atlas E/F launch was conducted on March 24, 1995, using a rocket which had originally been built as an Atlas E.
The SM-65F Atlas, or Atlas-F, was the final operational variant of the Atlas missile, only differing from the Atlas E in the launch facility and guidance package used. It first flew on 8 August 1961, and was deployed as an operational ICBM between 1961 and 1966. Following retirement as an ICBM, the Atlas-F, along with the Atlas-E, was refurbished for orbital launches as the Atlas E/F.
Launch Complex 576 is a group of rocket launch pads at Vandenberg Space Force Base. The pads were used from 1959 until 1971 to launch SM-65 Atlas missiles. The site was also known as Complex ABRES. Pads in Area 576 include 576A-1, 576A-2 and 576A-3, 576B-1, 576B-2 and 576B-3, 576-C, 576-D, 576-E, OSTF-1 and OSTF-2.
Launch Complex 11 (LC-11) at Cape Canaveral Space Force Station, Florida, is a launch complex used by Atlas missiles between 1958 and 1964. It is the southernmost of the launch pads known as Missile Row. When it was built, it, along with complexes 12, 13 and 14, featured a more robust design than many contemporary pads, due to the greater power of the Atlas compared to other rockets of the time. It was larger, and featured a concrete launch pedestal that was 6 metres (20 ft) tall and a reinforced blockhouse. The rockets were delivered to the launch pad by a ramp on the southwest side of the launch pedestal.
A missile launch facility, also known as an underground missile silo, launch facility (LF), or nuclear silo, is a vertical cylindrical structure constructed underground, for the storage and launching of intercontinental ballistic missiles (ICBMs), intermediate-range ballistic missiles (IRBMs), medium-range ballistic missiles (MRBMs). Similar facilities can be used for anti-ballistic missiles (ABMs).
The 6555th Aerospace Test Group is an inactive United States Air Force unit. It was last assigned to the Eastern Space and Missile Center and stationed at Patrick Air Force Base, Florida. It was inactivated on 1 October 1990.
Launch Complex 576A, also known as Area 576, is a group of rocket launch pads at Vandenberg Air Force Base. The pads at the complex were used from 1959 until 1971 to launch SM-65 Atlas missiles. The site was also known as Complex ABRES. Pads in Area 576A include 576-A-1,2,3
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