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LRO
LRO Lunar reconnaissance orbiter; C adds camera
(NASA).
LROPS, L-Rops Long-range operations.
LRP Lead-replacement petrol.
LRPA Long-range patrol aircraft.
LRQA Lloyd’s Register Quality Assurance [office,
Croydon] (UK).
LRR 1 Long-range [surveillance] radar.
2 Launch readiness review (KSC).
LRRA Low-range radar altimeter.
LRRR Laser ranging retro-reflector.
LRS 1 Load relief system.
2 Laser reference system.
3 Long-range strike.
LRSI Low-temperature reusable surface insulation
(usually 99% pure silica-fibre felted tiles).
LRSO Long-range stand-off; M adds missile.
LR 3 Laser ranging retro-reflector.
LRTS Long-range tactical surveillance.
LRU Line-replaceable unit.
LRV 1 Lunar rover vehicle.
2 Launch and recovery vehicle.
LRVD Lower rotating ventral door.
LS 1 Loudspeaker.
2 Landmarks subsystem.
3 Lavatory service vehicle.
4 Prefix: the last message I sent ...
5 Lecture series.
6 Loiter speed.
7 Left side.
8 Legacy software.
9 Landing site.
LSA 1 Logistics support analysis [R adds records].
2 Local-surface airspeed.
3 Low situational awareness.
4 Low-sidelobe antenna.
5 Light sport aircraft.
6 Lowest safe altitude.
LSAB London Society of Air-Britain.
LSAC Logistics supply analysis centre.
LSALS Lost survivor and asset locating system, detects
chemical plume in ocean from crashed aircraft.
LSALT See LSA6.
LSAM Lunar-surface access module.
LSAR Logistics support analysis records.
LSAS Longitudinal-stability augmentation system.
LSAT Logistic shelter, air-transportable.
LSB 1 Lower sideband.
2 Least significant bit.
3 Learned Society Board (RAeS).
LSC Logistics support costs.
LSD 1 Large-screen display.
2 Least significant digit
3 Lithium sulphur dioxide.
LSEV Less-stealthy export version.
LSF Load-sheet fuel.
LSFFAR Low-speed folding-fin aircraft rocket.
LS-FR Low-speed frame relay; AD adds access device,
SAD service access device.
LSH Light-support helicopter.
LSI 1 Large-scale integration (microelectronics).
2 Lead system[s]-integrator.
3 Large systems integrator.
LSIC Large-scale integrated circuit.
l.t.
LSIRR Limb-scanning IR radiometer.
LSJ Lifesaving jacket.
LSJSPO Lethal Strike Joint Systems Project Office
(DoD).
LSK 1 Line-select key.
2 Luftstreitkräfte, East German [DDR] air force
1949–90.
LSL Landing ship, logistic.
LSLT Line-of-sight link terminal (UAV).
LSM Linear synchronous motor.
LSMU Laser-communications space measurement
unit.
LSN Local sub-network.
LSO 1 Landing safety officer (manages aircraft-carrier
projector sight).
2 Landing signals officer; T adds trainer.
3 Limited strategic option.
LSP 1 Large-screen projection.
2 Logistics support plan.
3 Longitudinal short-period.
4 Link state PDU [protocol data unit].
5 Locus of subvehicle points.
6 Laser shock peening.
LSQ Line squall.
LSR Loose snow on runway.
LSRS Littoral surveillance radar system.
LSS 1 Local speed of sound.
2 Large space structure.
3 Lighting sensor system.
4 Land survey system [at crash site].
5 Linear-scanning seeker.
6 Laboratory-system specification (stealth).
LSSAS Longitudinal static-stability augmentation
system.
LSSM 1 Local scientific survey module.
2 Large-scale shared memory.
LSSS Lightweight SHF satcom system.
LSST 1 Lightweight secure Satcom terminal.
2 Laser spot seeker/tracker.
LST 1 Laser spot tracker.
2 Lightweight satellite terminal.
3 Lavatory servicing trailer.
4 Local sidereal [or standard] time.
5 Local Solar Time [on planet].
LSTAT Life support for trauma and transport.
LSU 1 Lavatory servicing unit.
2 Legacy software upgrade.
LSV 1 Laser speckle velocimetry.
2 Lavatory servicing vehicle.
LT 1 Low-pressure turbine.
2 Low temperature.
3 Lithium tantalate.
4 Turn left after takeoff.
5 Local time.
6 Launch time.
7 Laplace transform.
8 Linear token.
L/T Ratio of lift to thrust in jet-lift aircraft hovering or
moving slowly in ground effect; subscripts, v ground
vortex, h hover suckdown, w jet wake and f fountain.
LT Tail moment arm; sometimes now called tail length,
and written l t or l T .
lt Light, lighted.
l.t. Low tension (electrical).
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