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Glossary of Avionics Terms & Acronyms 航空电子术语和缩写词词典

时间:2011-07-29 09:39来源:蓝天飞行翻译 作者:航空 点击:


SL  Sensitivity Level 
S/L  Sub-Level 
Slant Range  The line-of-sight distance from the aircraft to a DME 
ground station. 
SLEP  Service Life Extension Program 
SLM  Standard Length Message 
SLS  Side-Lobe Suppression. A system that prevents a 
transponder from replying to the side-lobe interroga-
tions of the SSR. Replying to side-lobe interrogations 
would supply false replies to the ATC ground station 
and obscure the aircraft location. 
SLV  Sync Lock Valve 
SMC  System Management and Communication 
SMD  Surface Mount Device 
SMGCS  Surface Movement Guidance and Control Systems 
SMI  Standard Message Identifiers 
SMR  Surface Movement Radar 
SMSO  Space and Missile Systems Organization 
SMT  (1) Aileron/Rudder Servo Mount 
(2) Elevator Servo Mount 
(3) Servo Mount 
(4) Stabilizer Trim Servo Mount 
(5) Station Management 
SNR  Signal-to-Noise Ratio 
SOIT  Satellite Operational Implementation Team 
SOP  Standard Operating Procedure 
SOS  Silicon On Sapphire 
SPATE  Special Purpose Automatic Test Equipment 

SPC  Statistical Process Control 
SPD  Speed 
SPE  Seller Purchased Equipment 
Speed of Light  Represented by the symbol c and has a value of 2.9979250 x 10 metres/second or 983,571,194 feet/second. 
SPI  Special Position Identification 
SPIP  Designation for a transponder ident pulse. 
SPKR  Speaker 
SPM  (1) Surface Position Monitor (2) Stabilizer Position Modules 
Spoking  Spoking refers to a display presentation which radi-ates outward from the display origin like the spokes on a wagon wheel. 
SPR  Sync Phase Reversal (term used in Mode S transpon-ders) 
SPS  Standard Positioning Service 
SQ or Sql  Squelch 
Squall Line  A squall line is a line of thunderstorms and develop-ing thunderstorms. 
Squawk  Reply to interrogation signal (XPD). 
Squelch  A control and/or circuit which reduces the gain in response of a receiver. The squelch is used to elimi-nate the output noise of the receiver when a signal is not being received. 
Squitter  (1) The random pulse pairs generated by the ground station as a filler signal. (2) The transmission of a specified reply format at a minimum rate without the need to be interrogated (filler pulses transmitted between interrogations) [XPD]. (3) Spontaneous Transmission generated once per sec-ond by transponders. 
SR  SwissAir 
SRADD  Software Requirements And Design Description 

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