Large OpticsThe technology of constructing and employing mirrors over 1 m aperture to direct and control high power beam weapons/systems with large coverage, or to…
LasantA material that can be stimulated to produce laser light. Many materials can be used as lasants ; these can be in solid, liquid, or gaseous form…
Laser Guided WeaponA weapon that uses a seeker to detect laser energy reflected from a laser marker/designated target and, through signal processing, provides guidance…
Laser Imaging RadarA technology whereby a laser beam can be used in a way similar to the use of a radar beam to produce a high-quality image of an object.
Laser OpticsTechnology associated with the use and control of laser beams with flux greater than 1 watt/cm2.
Laser SeekerA device based on a direction sensitive receiver that detects the energy reflected from a laser designated target and defines the direction of the target…
Laser Target Designating SystemA system that is used to direct (aim or point) laser energy at a target. The system consists of the laser designator or laser target marker with its…
Laser TrackerA device that locks on to the reflected energy from a laser marked/designated and defines the direction of the target relative to itself.
Laser WeaponsDevices, such as photon generators, which produce a narrow beam of coherent radiated power greater than 1 MW.
Launch AzimuthMissile launch location measured in degrees clockwise from the local northpointing longitude line at the launch site. (USSPACECOM)
Launch DetectionInitial indication by any one of a variety of sensors that a booster has been launched from some point on the surface of the earth, with initial…
Launch Point DeterminationWith computer methods, uses missile track observation to estimate the point on the earths surface from which the missile was launched, expressed in terms…
Launch Under Attack (LUA)Execution by National Command Authorities of Single Integrated Operational Plan forces subsequent to tactical warning of strategic nuclear attack against…
Launch VerificationConfirmation of a detection of a booster launch by receiving a report from a sensor separate and independent of the sensor that initially detected a…
Layered DefenseA defense that consists of several sets of weapons that operates at different phases in the trajectory of a ballistic missile.
Lead Component/ ServiceThe DoD Component designated by SECDEF to be responsible for management of a system acquisition involving two or more DoD Components in a joint program.
Least PrivilegeThis principle requires that each subject in a system be granted the most restrictive set of privileges (or lowest clearance) needed for the performance…
LILifted Index. A common measure of atmospheric instability. Its value is obtained by computing the temperature that air near the ground would have if it…
LIDARAn instrument similar to a radar but uses a laser to generate light pulses rather than radio waves, generally used to measure aerosol content and particle…
life cycleThe sequence of events from a given developmental stage in one generation to the same stage in the following generation.
Life Cycle of a Weapon SystemAll phases of the system's life including research, development, test and evaluation, production, deployment (inventory), operations and support, and…
Life JacketThe life support storage container for a Brilliant Pebbles singlet. The life jacket contains subsystems that perform power, communications, and…
Life-Cycle Cost (LCC)The total cost to the Government of acquisition and ownership of that system over its useful life.