Did you ever wonder what those strange conglomerations of letters meant? Here's your chance to find out what those NASA acronyms stand for. About Space and Astronomy presents the Guide to NASA Acronyms. From Launch to Liquid Nitrogen - Launch Operations to Launch Window Display, you'll find them here. This page lists acronyms starting with L. For others, click on the appropriate letter above or below.

[L]

L: Launch
L: Left
L: Length
L: Level
L: Low
L: Lumen
L&C: Laboratory and Checkout
L&D: Landing and Deceleration
L&L: Launch and Landing
L&S: Logistics and SuPport
L&T: Laboratory and Test
L-BAND: S-Band 390 to 1550 MHz
L-L: Line-to-Line
L-P: Low Pressure
L/D: Length-to-Diameter
L/D: Lift-to-Drag (Ratio)
L/H: Local Horizontal
L/O: Lift-off
L/S: LLoad SYstem
L/S: Landing Site
L/T: Load Test
L02: Liquid Oxygen
LA: Launch Area
LA: Lanthanum
LA: Launch Abort
LA: Launch Azimuth
LA: Lightning Arrester
LA: Launch Aft
LA: Low Attitude
LAAD: Los Angeles Aircraft Division (Rockwell)
LACB: Landing Aids Control Building (SLF at KSC)
LACIE: Large Area Crop Inventory Experiment
LACIP: Large Area Crop Inventory Program
LAGEOS: Laser Geodynamic Satellite
LAGS: Launch Abort Guide Simulation
LAIR: Liquid Air
LAIU: Launch Abort Interface Unit
LAN: Local Area Network
LAPS: Left Aft Propulsion System (Subsystem)
LARS: Laminar Angular Rate Sensor
LARSSYAA: for Aircraft Analysis
LARSSYAA: Laboratory for Application of Remote Sensing System
LASCOT: Large Screen Color Television System
LASV: Low Altitude Supersonic Vehicle
LAT: Lateral
LAT: Latch
LAT: Large Angle Torque
LAT: Lot Acceptance Test
LAT: Latitude
LATS: LDEF Assembly and Transportation System
LB: Lower Brace
LB: Low Bay
LB: Load Bank
LB: Launch Bus
LB: Launch Boost
LBDT: Low Bay Dolly Tug
LBK: Left Bank
LBL: Left Buttock Line
LBM: Load Buffer Memory
LBNPD: Lower Body Negative Pressure Device
LBR: Low Bit Rate
LC: Left Center
LC: Launch Complex
LC: Launch Critical
LC: Launch Countdown
LCA: Load Controller (Control) Assembly
LCA: Launch Control Amplifier
LCA: Load controller assembly
LCB: Least Common Bit
LCC: Life Cycle Cost
LCC: Launch Control Center
LCC: Launch Commit Criteria
LCC: Launch Control Center (KSC)
LCCD: Launch Commit Criteria Document
LCD: Launch Countdown
LCF: LowCycle Fatigue
LCG: Liquid Cooled Garment
LCG: Liquid-cooled garment
LCH: LatLaunch
LCH: Latch
LCHTF: LowCYcle High Temperature Fatigue
LCL: Local
LCM: Least Common Multiple
LCMS: LowCost Modular Spacecraft
LCO: MMCUniform Central Number
LCOM: Logic Control OutPut Module
LCR: LowCross Range
LCS: Launch Control System
LCS: LauList of Command Signals
LCT: Launch Countdown
LCU: Line Coupling Unit
LCUG: Liquid Cooling under Garment
LCVG: Liquid Cooling and Ventilation Garment
LCVG: Liquid cooling and ventilation garment
LD: LatLoading Dock
LD: Lateral Direction
LDB: LauLogistics Data Bank
LDB: Launch Data Bus
LDEC: Lunar Docking Events Controller
LDEF: Long Duration ExPosure Facility
LDG: Landing
LDIU: Launch Data Interface Unit
LDMK: Landmark
LDR: LowData Rate
LDR: Low data rate
LDS: Landing/Deceleration Subsystem
LDS: "LanLanding, Deservicing, and Safing"
LDS: LanLoads
LDT: Linear Displacement Transducer
LE: Launch Escape
LE: LauLeading Edge
LEA: Logistics Engineering Analysis (Analyses)
LEB: Lower Equipment Bay
LEC: Lockheed Electronics Company
LED: Light Emitting Diode
LED: Light-emitting diode
LEH: Launch/Entry Helmet
LEM: Launch Escape Monitor
LEM: Laboratory Environment Model
LEO: Low Earth Orbit
LER: Long Eye Relief (Optics)
LES: Launch Equipment Shop
LES: Launch Escape Subsystem
LESS: Leading Edge Structure Subsystem
LESS: Leading Edge Subsystem
LESS: Leading edge structure subsystem
LETF: Launch Equipment Test Facility
LETF: Launch Equipment Test Facility (KSC)
LF: Low Frequency
LF: Load Factor
LF: Left Forward
LF: Launch Forward
LF: Launch Facility
LFAF: Low Frequency Accelerometer Flutter
LFAM: Low Frequency Accelerometer Modes
LFAP: Low Frequency Accelerometer Pogo
LFC: Large Format Camera
LFO: Low Frequency Oscillator
LFOP: Landing and Ferry Operations Panel
LFRR: Low Frequency Radio Range
LG: Landing Gear
LG: Length
LGA: Low Gain Antenna
LGIU: Laser Gyro Interface Unit
LH: Left Hand
LH2: Liquid Hydrogen
LH2: Liquid hydrogen
LHA: Local Hour Angle
LHC: Left Hand Circular
LHCP: Left Hand Circular Polarization
LHCP: Left Hand Circularly Polarized
LHP: Left Hand Panel
LHS: Left Hand Side
LHe: Liquid Helium
LIB: Left Inboard
LIC: Load Interface Circuit
LID: Leadless inverted Device
LID: Logistics Identification Document
LIDAR: Laser-Radar
LIE: Left Inboard Elevon
LIM: Limit
LIMRC: LRU Identification and Maintenance Requirements Catal
LIMS: Logistics Inventory Management System
LIN: Liquid Nitrogen
LIN: Linear
LINJET: Liquid Injection Electric Thruster
LIQ: Liquid
LK: Leak
LK: Lock
LL: Low Level
LL: Lever Lock
LL: Lower Limit
LL: Lower Left
LL: Launch and Landing
LL: Launch Left
LL: Long Line
LL: Long Lead
LLCF: Launch and Landing Computational Facilities
LLI: Limited Life Item
LLIL: Long Leadtime Items List
LLOS: Landmark Line-of-Sight
LLP: Launch and Landing Project
LLPO: Launch and Landing Project Office
LLS: Launch and Landing Site
LLT: Long Leadtime
LM: Left Mid
LM: Long Module
LME: Launch Monitor Equipment
LMF: Lower Mid-Fuselage
LMG: Left Main Gear
LMK: Landmark
LMP: List of Measurement Points
LMS: Logistics Master Schedules
LMS: Load Measurement System
LMSC: Lockheed Missiles and Space Corporation
LN: Line
LN2: Liquid Nitrogen
LNCH: Launch
LNDG: Landing
LNG: Liquefied Natural Gas
LO: Lock-On
LO: Launch Operations
LO: Local Oscillator
LO2: Liquid oxygen
LOA: Landing Operations Area
LOA: Launch Operations Area
LOAP: List of Applicable Publications
LOB: Line of Balance
LOB: Left Outboard
LOC: Location
LOC: Localizer
LOC: Launch Operations Complex
LOCC: Launch Operations Control Center
LOE: Line of Effort
LOE: Level of Effort
LOE: Left Outboard Elevon
LOFAR: Low Frequency Acquisition and Ranging
LOFO: Low Frequency oscillation
LOGO: Limit of Government Obligation
LOI: Lunar Orbit Insertion
LOL: Limit of Liability
LOLI: Limited Operational-Life items
LON: Longitude
LONG: Longitude
LOR: Lunar Orbit Rendezvous
LORA: Level of Repair Analysis
LORAN: Long Range Navigation
LOS: Loss of Sync
LOS: Loss of Signal
LOS: Line of Sight
LOS: Lift-Off Simulator
LOT: Lift-Off Time
LOV: Limit of Visibility
LOV: Loss of Visibility
LOWG: Landing Operations Working Group
LOX: Liquid Oxygen (LO2
LP: Launch Pad
LP: Liquid Propellant
LP: Low Pressure
LPD: Landing Point Designator
LPD: Launch Procedure Document
LPDM: List of Physical Dimensions
LPF: Low Pass Filter
LPFT: LOPW Pressure Fuel Turboprop
LPFT: Low-pressure fuel turbopump
LPFTP: Low Pressure Fuel Turbopump
LPG: Last Page Generator (Distribution List Used in All OMT'S)
LPG: Liquid Propellant Gun
LPLWS: Launch Pad Lightning Warning System
LPM: Lines per Minute
LPOP: Low Pressure Oxidizer Turbopump
LPOT: Low-pressure oxidizer turbopump
LPOTP: Low Pressure Oxidizer Turbopump
LPOX: Low Pressure Oxygen
LPR: Line Printer
LPS: Launch Processing (Processor) System
LPS: Liters Per Second
LPS: Launch processing system
LPS/CDS: LPS/Central Data Subsystem
LPTTL: Low Power Transistor-Transistor Logic
LPW: Lumens per Watt
LR: Landing Radar
LR: Launch Right
LR: Left Rudder
LR: Lower Right
LR/LD: Line Receiver/Line Driver
LRECL: Logical Records of Fixed Length
LRF: Liquid Rocket Fuel
LRO: Large Radio Observatory
LRR: Launch Readiness Review
LRSI: Low Temperature Reusable Surface Insulation
LRSI: Low-temperature reusable surface insulation
LRU: Line Replaceable Unit
LRU: Line-replaceable unit
LRV: Long Range Video
LRV: Launch Readiness Verification
LS: Limit Switch
LS: Launch Sequence
LS: Landing Side
LS: Left Side
LS: Life Science
LS/ST: Light Shield/Star Tracker
LSA: Launch Services Agreement
LSA: Logistics Support Analysis
LSAH: Launch Site Accommodations Handbook
LSAP: Launch Sequence Applications Program
LSB: Lower Side Band
LSB: Least Significant Bit
LSC: Linear Shaped Charge
LSCA: Logistics Support Cost Analysis
LSD: Low Speed Data
LSD: Landing Ship Dock
LSE: Launch Support Equipment
LSE: Life Support Equipment
LSF: Laboratory Simulation Facility
LSFE: Life Sciences Flight Experiment
LSI: Large Scale Integration
LSID: Launch Sequence and Interlock Document
LSM: Life Science Module
LSM I: Logistics Support Management Information
LSO: Landing Support Officer
LSO: Large Solar Observatory
LSP: Least Significant Portion
LSPDF: Life Science Payloads Development Facility
LSR: Launch Site Recovery
LSR: Land Sea Rescue
LSRM: Life Science Research Module
LSS: "Landing, Separation Simulator"
LSS: Life Support Subsystem
LSS L: Life Sciences Space Laboratory
LSSF: Life Sciences Support Facility
LSSM: Launch Site Support Manager
LSSP: Launch Site Support Plan
LSSRC: Life Sciences Shuttle Research Centrifuge
LSST: Launch Site Support Team
LST: Large Space Telescope
LST: Large Stellar Telescope
LST: Launch Support Team
LST: Liquid Storage Tank
LST: Local Standard Time
LSTE: Launch Site Transportation Equipment
LSU: Life Support Umbilical
LT: Lead Time
LT: Light
LT: Lef t
LTA: Lower Torso Assembly
LTD: Limited
LTD: Lift-to-Drag
LTG: Lighting
LTG: Linear Tangent Guidance
LTM: Lead Time Matrix
LUB: Lubricate
LUS: Liquid Upper Stage
LUT: Launcher-Umbilical Tower
LV: Loading Valve
LV: Low Voltage
LV: Load Vertical
LV: Launch Vehicle
LV: Lift Vector
LV: Limit Value
LVDC: Launch Vehicle Digital Computer
LVDT: Linear Variable Differential Transformer
LVDT: Linear Voltage Differential Transformer
LVL: Level
LVLH: Local Vertical/Local Horizontal
LVLH: Local vertical/local horizontal
LW: Launch Window
LWD: Left Wing Down
LWD: Launch Window Display
LWG: Logistics Working Group
LWHS: Light-Weight Headset
LWHS: Lightweight headset
LWR: Lower
LWS: Lightning Warning System
LaRC: "Langley Research Center (Hampton, VA)"
LeRC: "Lewis Research Center (Cleveland, OH)"
Li: Lithium
LiOH: Lithium Hydroxide
LiOH: Lithium hydroxide

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