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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:


SD  (1) Side Display
(2) Storm Detection. It is the designation for the hourly transmitter radar observations from the NWS and ARTCC radars. Individual SD.s are combined and transmitted once an hour as collectives (SDU.s) over the aviation teletype circuits.
SDD Standard Disk Drive SDI Source Destination Identifier SDM Speaker Drive Module SDRL Supplier Data Requirements List SDU Satellite Data Unit Search In this mode,the DMS scans from 0 mile to the outer
range for a reply pulse pair after transmitting an inter-rogation pulse pair. SEC Secondary SED Secondary EICAS Display SEI Standby Engineer Indicator SEL Select
SELCAL  S e l e c t i ve Calling System. A system used in conjunc-tion with HF and VHF communication systems that a l l ows a ground-based radio operator to call a single a i rc raft or group of airc raft without the airc raft per-sonnel monitoring the ground station radio fre q u e n c y.
Sensitivity  An instruction given to the TCAS equipment for 
Level  control of its threat volume. 
Command 
SEPC  Secondary Electrical Power Contactor 
SEPP  Stress Evaluation Prediction Program 
SERNO  Serial Number 
SEU  (1) Single Event Upset 
(2) Seat Electronics Unit 
SFE  Supplier Furnished Equipment 
SG  Signal Generator 
SGPNS  Enhanced Ground Proximity Warning System 
SI  (1) Standby Instruments 
(2) Supporting Interrogator 
SICAS  Secondary Surveillance Radar Improvements and 
Collision Avoidance System 
SICASP  Secondary Surveillance Radar Improvements and 
Collision Avoidance System Panel 
SID  Standard Instrument Departure 
Sidetone  The reproduction of sounds in a headset (or speaker) 
from the transmitter of the same communication set. 
This allows a person to hear his/her own voice when 
transmitting. 
SIF  Standard Interchange Format 
SIGMETS  Significant Meteorological Observations 
SIL  (1) Systems Integration Lab 
(2) Service Information Letter 
Simplex  A communication operation that uses only a single 
channel for transmit and receive operations. 
Communications can take place in only one direction 
at a time. 
SIP  Single In-line Package 
SITA  Societe Internationale de Telecommunications 
Aeronautiques 
SIU  Satellite Interface Unit 

Skywave  A radio wave that is reflected by the ionosphere. 
Depending upon the state of the ionosphere,the 
reflected radio wave may propagate along the layer of 
the ionosphere or be reflected at some angle. It is 
also known as ionospheric or indirect wave. 

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