MDMesoscale Discussion- When conditions actually begin to shape up for severe weather, SPC (Storm Prediction Center) often issues a Mesoscale Discussion…
MDAAbbreviation for multiple drop array. See: microdroplet array.
mean time between failures (MTBF)A measure of the reliability of an item. Defined as the total functioning life of an item divided by the total number of failures within the population…
mean time to repair (MTTR)The total elapsed time for corrective maintenance divided by the total number of corrective maintenance actions during a given period of time.
Measure of Effectiveness (MOE)The quantitative expression (sometimes modified by subjective judgment) of the success of a system in achieving a specified objective.
Medium Earth Orbit (MEO)Space vehicles characterized by orbits between 400 and 10,000 nautical miles, longer duration revolution (2 to 12 hours), longer visibility envelopes (10…
Medium Extended Air Defense System (MEADS)A lightweight, highly transportable, low-to-medium altitude air defense and theater missile defense system designed to protect critical fixed and…
Medium Power LasersLasers that radiate power less than 1 MW, normally used to detect, identify, track, and designate a target vehicle.
Medium Wavelength Infrared (MWIR)Thermal radiation emitted by a source in the electromagnetic spectrum encompassing infrared wavelengths of 3 to 6 microns. 180
Memorandum of Agreement (MOA)(1) In contract administration, an agreement between a program manager and a Contract Administration Office, establishing the scope of responsibility of…
MESFETMetal Schottky -Gate Field Effect Transistor.
MesosphereThe atmospheric shell between about 20 km and about 70 to 80 km, extending from the top of the stratosphere (the stratopause) to the upper temperature…
Methods EngineeringThe technique that subjects each operation of a given piece of work to close analysis to eliminate every unnecessary element or operation and to approach…
MICOMU.S. Army Missile Command, Redstone Arsenal, AL.
Mid-Course Defense Segment (MDS)The portion of the BMDS that defeats ballistic missiles during the period of flight between boost and atmospheric reentry.
Midcourse (MC) PhaseThat portion of a ballistic missile's trajectory between the boost phase and the reentry phase when reentry vehicles and penaids travel at ballistic…
Midcourse GuidanceThe guidance applied to a missile between termination of the boost phase and the start of the terminal phase of flight. 182
Midcourse Space Experiment (MSX)Designed to provide demonstrations of midcourse acquisition and tracking from space, technology integration of optics, focal plane arrays, signal…
Milestone Decision AuthorityThe individual designated in accordance with criteria established by the Under Secretary of Defense for Acquisition and Technology to approve entry of an…
Milestones (MS)Major decision points that separate the phases of an acquisition program.
Military CapabilityThe ability to achieve a specified wartime objective (win a war or battle, destroy a target set). It includes four major components: a).
Military Operational RequirementsThe formal expression of a military need, the response to which results in development or acquisition of items, equipment, or systems.
Military RequirementAn established need justifying the timely allocation of resources to achieve a capability to accomplish approved military objectives, missions, or tasks.
Military Satellite (MILSAT)A satellite used for military purposes, such as navigation or intelligence gathering. 183
Military Strategy SelectionThe determination of: (1) what targets to defend and their priorities in order to achieve the selected national strategy, and (2) the type of attackers…
Military UtilityThe military worth of a system performing its mission in a competitive environment, including versatility (or potential) of the system.