Life-Cycle ManagementProcess for administering an automated information system or hardware support system over its whole life, with emphasis on strengthening early decisions…
Life-Cycle ModelA framework containing the processes, activities, and tasks involved in the development, operation, and support of the system, spanning the life of the…
Light Detection and Ranging (LIDAR)A precision probing instrument used to measure concentrations of different gasses or particulates in a given amount of atmosphere.
Light Replicas (LREP)Decoys that, by virtue of shape, closely approximate an RVs signature with little off-load penalty.
Limited AttackAn attack on the U.S. and its allies, which provides a stressing timeline, and is geographically distinct. Not an all-out attack or mass wave.
Limited Defense System (LDS)The development of systems, components, and architectures for a deployable anti-ballistic missile system (as described in section 232(a)(1) of the 1991…
Limited Operational Capability (LOC)A point in time when the first set of sensors and weapons can be employed to provide a limited protection system.
Limited ProductionThe initial production of a system in limited quantity. Part of an acquisition strategy to be used in test and evaluation for verification of design…
Limited Test Ban TreatyThe bilateral Treaty signed and ratified by the United States and the (former) U.S.S.R.
LinacA machine that uses electricity to form a stream of fast-moving subatomic particles. This creates high-energy radiation that may be used to treat cancer.
Line Item (Budget)A specific program end item with its own identity (e.g., B-1B Bomber).
Line of Sight (LOS)The line from sensor to target necessary for the commencement of the detection, acquisition, track, and identification of a target.
Line Replaceable Unit (LRU)An essential support item removed and replaced at field level to restore end item to an operationally ready condition.
Link Quality EvaluationThis testing of links to create bit error estimates and monitors natural or induced link interference.
Local EnvironmentThe ISTC Local Environment contained within each node simulates the element to the degree necessary to generate a realistic input to the Element Processor…
Lock OnSignifies that a tracking or target-seeking system is continuously and automatically tracking a target in one or more coordinates (e.g.
LODEA mineralized ledge, vein or mineral deposit in place.
LogisticsThe science of planning and carrying out the movement and maintenance of forces.
Logistics SupportThe supply and maintenance of materiel essential to proper operation of a system in the force.
Logistics Support Analysis (LSA)The selective application of scientific and engineering efforts undertaken during the acquisition process, as part of the systems engineering process, to…
Logistics Support Analysis Record (LSAR)A formal tool under MIL-STD 1388-2A that uses records/forms to document operations and maintenance requirements, RAM, task analyses, technical data…
Logistics SupportabilityThe degree to which planned logistics support (including test, measurement, and diagnostic equipment; spares and repair parts; technical data; support…
Long Lead ItemsThose components of a system for which the times to design and fabricate are the longest, and, therefore, to which an early commitment of funds may be…
Long Wavelength Infrared (LWIR)Thermal radiation emitted by a source in the electromagnetic spectrum encompassing infrared wavelengths of 6 to 30 microns.
LowA region of low pressure, marked as "L" on a weather map. A low center is usually accompanied by precipitation, extensive cloudiness, and moderate winds.
Low Earth Orbit (LEO)These satellites are at altitudes between 100 and 400 nautical miles. They have short duration revolutions (about 90 minutes), short visibility envelopes…
Low EndoatmosphereThat portion of the earth's atmosphere, generally below 40 km altitude. 170
Low-Rate Initial Production (LRIP)The production of a system in limited quantity to provide articles for operational test and evaluation, to establish an initial production base, and to…
LOWKATRERLow Weight Kinetic Energy Active Tracker.
LOWTRANAtmospheric and Interstellar Background Signature Model.