時間：2011-07-29 09:39來源：藍(lán)天飛行翻譯 作者：航空 點擊：次
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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. |
