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  2. Full width at half maximum - Wikipedia

    en.wikipedia.org/wiki/Full_width_at_half_maximum

    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.

  3. Glossary of military abbreviations - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_military...

    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 ...

  4. List of U.S. government and military acronyms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._government...

    List of initialisms, acronyms ("words made from parts of other words, pronounceable"), and other abbreviations used by the government and the military of the United States. Note that this list is intended to be specific to the United States government and military—other nations will have their own acronyms.

  5. Beam diameter - Wikipedia

    en.wikipedia.org/wiki/Beam_diameter

    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.

  6. Military designation of days and hours - Wikipedia

    en.wikipedia.org/wiki/Military_designation_of...

    (NATO). The "D" may stand for "Day". [3] E-Day The unnamed day on which a NATO exercise commences. (NATO) F-Hour The effective time of announcement by the U.S. Secretary of Defense to the Military Departments of a decision to mobilize Reserve units. (US) G-Day The unnamed day on which an order, normally national, is given to deploy a unit ...

  7. Rapid Engineer Deployable Heavy Operational Repair Squadron ...

    en.wikipedia.org/wiki/Rapid_Engineer_Deployable...

    Units are self-sufficient, 404-person mobile squadrons, capable of rapid response and independent operations in remote, high-threat environments worldwide. They provide heavy-repair capability and construction support when requirements exceed normal base civil engineer (Prime BEEF) capabilities and where U.S. Army engineer support is not ...

  8. U.S. Navy and U.S. Marine Corps Aircraft Squadron Designations

    en.wikipedia.org/wiki/U.S._Navy_and_U.S._Marine...

    Although most World War II era carrier-based fighter units have routinely performed ground attack missions, some squadrons have been specifically designated as VBF during the course of war. VBF designation was discontinued after the war, and until the introduction of the McDonnell-Douglas F/A-18 Hornet the Navy squadrons flying tactical ...

  9. List of established military terms - Wikipedia

    en.wikipedia.org/wiki/List_of_established...

    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.