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Peacekeeper ICBM
The LGM-118 Peacekeeper, originally known as the MX for "Missile, Experimental", was a MIRV-capable intercontinental ballistic missile (ICBM) produced and deployed by the United States from 1985 to 2005. The missile could carry up to twelve Mark 21 reentry vehicles (although treaties limited its actual payload to 10), each armed with a 300-kiloton W87 warhead. Initial plans called for building and deploying 100 MX ICBMs, but budgetary concerns eliminated the final procurement; only 50 entered service. Disarmament treaties signed after the Peacekeeper's development led to its withdrawal from service in 2005. Studies on the underlying concept started in the 1960s. The idea was to allow the U.S. to absorb a sneak attack by the USSR with enough warheads surviving to attack the remaining Soviet missile silos. To do so, the missiles had to be highly accurate, be based in such a way that enough would survive a nuclear attack, carry a large number of warheads so the survivors would stil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1st Strategic Aerospace Division
The 1st Strategic Aerospace Division (1st STRAD) is an inactive United States Air Force organization. Its last assignment was with Strategic Air Command, assigned to Fifteenth Air Force, being stationed at Vandenberg Air Force Base, California. It was inactivated on 1 September 1991. The division directed and supervised heavy bombardment (1943–1945) and fighter (1944–1945) operations during World War II within the Eighth Air Force in the European Theater. Replacing the Eighth Air Force in Okinawa in June 1946, the division directed fighter reconnaissance and bomber organizations, and provided air defense for the Ryukyu Islands, Japan until December 1948. From 1954 to 1955, the division served as a holding unit at Westover Air Force Base, Massachusetts, for personnel of Eighth Air Force, who moved to the base as part of a transfer of Eighth's headquarters from Carswell Air Force Base, Texas. Activated again under the Air Research and Development Command in April 1957, it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circular Error Probable
In the military science of ballistics, circular error probable (CEP) (also circular error probability or circle of equal probability) is a measure of a weapon system's precision. It is defined as the radius of a circle, centered on the mean, whose perimeter is expected to include the landing points of 50% of the rounds; said otherwise, it is the median error radius. That is, if a given munitions design has a CEP of 100 m, when 100 munitions are targeted at the same point, 50 will fall within a circle with a radius of 100 m around their average impact point. (The distance between the target point and the average impact point is referred to as bias.) There are associated concepts, such as the DRMS (distance root mean square), which is the square root of the average squared distance error, and R95, which is the radius of the circle where 95% of the values would fall in. The concept of CEP also plays a role when measuring the accuracy of a position obtained by a navig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
