land lineAn informal name for conventional telephone facilities. Note: Land lines include conventional twisted-pair lines, carrier facilities, and microwave radio…
land mobile serviceA mobile service between base stations and land mobile stations, or between land mobile stations. [NTIA] [RR] [47CFR]
land mobile stationA mobile station in the land mobile service capable of surface movement within the geographical limits of a country or continent. [NTIA] [RR] [47CFR]
land mobile-satellite serviceA mobile-satellite service in which mobile Earth stations are located on land. [NTIA] [RR]
land stationA station in the mobile service not intended to be used while in motion. [NTIA] [RR] [47CFR]
Landing PageThe page on which a visitor arrives after clicking on a link or advertisement.
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…
large prime factorsSpecially constructed large prime numbers, viz., p1, p2, q1, and q2, each > 2100, where p1|p-1, p2|p+1, q1|q-1, and q2|q+1, where p and q are the private…
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 Detection and Ranging (LIDAR)(LIDAR)An optical remote sensing technology which measures properties of scattered light to find range and/or other information of a distant target.
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 intelligence (LASINT)Technical and geolocation intelligence derived from laser systems; a subcategory of electro-optical intelligence. [JP 1-02]
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.
Latent FingerprintA fingerprint "image" left on a surface that was touched by an individual. The transferred impression is left by the surface contact with the friction…
lateral filingFile system in which files are accessed side to side, not front to back. Also used to describe furniture built to support this type of file system See…
lateral offset lossIn fiber optics, a loss of optical power at a splice or connector, caused by a lateral, i.e.
latitude-longitudeA spherical reference system used to measure locations on the Earth's surface. Latitude and longitude are angles measured from the Earth's center to…
LatticeThe regular periodic arrangement of atoms or molecules in a crystal of semiconductor material.
launch angleThe angle, with respect to the normal, at which a light ray emerges from a surface. 2.
Launch AzimuthMissile launch location measured in degrees clockwise from the local northpointing longitude line at the launch site. (USSPACECOM)
launch configurationA set of descriptive parameters used to create new EC2 instances in an Auto Scaling activity.
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 numerical aperture (LNA)The numerical aperture of an optical system used to couple (launch) power into an optical fiber.
launch permissionAn Amazon Machine Image (AMI) attribute that allows users to launch an AMI.
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…
launching fiberAn optical fiber used in conjunction with a source to excite the modes of another fiber in a particular fashion.
lay lengthIn communications cables--including fiber-optic cables--having the transmission media wrapped helically around a central member, the longitudinal distance…
layerA thematic set of spatial data described and stored in an ArcStorm database or a LIBRARIAN map library.
layer entityAn active element within a layer. [T1.630-1999]
layer functionA part of the activity of the layer entities. [T1.627-1993]
layer interfaceThe boundary between two adjacent layers in the model. [T1.110-1987]
layer serviceA capability of the (N) layer and the layers beneath it, which is provided to (N + 1) layer entities, at the boundary between the (N) layer and the (N +…
layer service elementsAn indivisible component of the layer service made visible to the service user via layer service primitives. [T1.110-1987]
layer service primitivesA means for specifying in detail the adjacent layer interactions. [T1.110-1987]
layer user dataData transferred between corresponding entities on behalf of the upper layer or layer management entities for which they are providing services. [T1.
Layered DefenseA defense that consists of several sets of weapons that operates at different phases in the trajectory of a ballistic missile.
layered protocolThe protocol reference model defined by layered structures based on and using the terminology of ITU-T Recommendations X.200 and X.210.
layered systemA system in which components are grouped, i.e., layered, in a hierarchical arrangement, such that lower layers provide functions and services that support…
layout managerAn object responsible for sharing the available space between multiple components within a graphical container.
lazinessThe quality that makes you go to great effort to reduce overall energy expenditure.