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In a distribution, full width at half maximum (FWHM) is the difference between the two values of the independent variable at which the dependent variable is equal to half of its maximum value. In other words, it is the width of a spectrum curve measured between those points on the y -axis which are half the maximum amplitude.
A A&TWF – Acquisition and technology work force a – Army AA – Assembly area AA – Anti-aircraft AA – Aegis ashore AAA – Anti-aircraft artillery "Triple A" AAAV – Advanced Amphibious Assault Vehicle AAC – Army Air Corps AAD – Armored amphibious dozer AADC – Area air defense commander AAE – Army acquisition executive AAG – Anti-aircraft gun AAK – Appliqué armor kit (US ...
Five definitions of the beam width are in common use: D4σ, 10/90 or 20/80 knife-edge, 1/e 2, FWHM, and D86. The beam width can be measured in units of length at a particular plane perpendicular to the beam axis, but it can also refer to the angular width, which is the angle subtended by the beam at the source.
Echelon formation: a military formation in which members are arranged diagonally. Encirclement: surrounding enemy forces on all sides, isolating them. Enfilade: a unit (or position) is "enfiladed" when enemy fire can be directed along the long axis of the unit. For instance, a trench is enfiladed if the enemy can fire down the length of the trench.
Air units were designated as part of this structure as Aircraft, Fleet Marine Force, Pacific. [8] The headquarters of Fleet Marine Force, Pacific, was officially established on 17 September 1944. On 16 December 1946, the Fleet Marine Force, Atlantic, was established, serving a similar purpose for the U.S. Atlantic Fleet. [6]
In 1963, the U.S. Department of Defense established a designation system for rockets and guided missiles jointly used by all the United States armed services. [1] It superseded the separate designation systems the Air Force and Navy had for designating US guided missiles and drones, but also a short-lived interim USAF system for guided missiles and rockets.
Since the Airborne was designed to deploy rapidly into "hot" situations, its 1, 2, and 3 Commando units, with attached support—a total of 900 soldiers—were sent to Somalia late in 1992. The operation was called Operation Deliverance and formed part of the overall U.S.-led Operation Restore Hope.
Lists of military units and formations of World War II (60 P) Pages in category "Lists of military units and formations" The following 54 pages are in this category, out of 54 total.