| s |
second |
| S+DX |
Speech Plus Duplex |
| SA |
Selective Availability |
| SA |
Service Area |
| SABM |
Set Asynchronous Balanced Mode |
| SAC |
Satellite Access Controller |
| SADA |
Solar Array Drive Assembly |
| SADE |
Solar Array Drive Electronics |
| SADM |
Solar Array Drive Mechanism |
| SAGR |
Supergroup Automatic Gain Regulator |
| SAN |
Satellite Access Node |
| SAO |
Signatory Affairs Office |
| SAP |
Second Audio Program |
| SAR |
Safety Assessment Report |
| SAR |
Search and Rescue |
| SAR |
Synthetic Aperture Radar |
| SAS |
Satellite Access Station |
| SAS |
Subscriber Authorisation System |
| SAT |
Supervisory Audio Tone |
| SBAI |
Selective Backward Alarm Indication |
| SBB |
SwiftBroadBand |
| SBC |
SC Bit Map Creation |
| SBC |
Single Board Computer |
| SBCA |
Satellite Broadcasting and Communications Association |
| SBS |
Satellite Base Station |
| SBSP |
Space Based Solar Power |
| S/C |
Spacecraft |
| S/C |
Suppressed Carrier |
| SC |
Satellite Channel |
| SC |
Service Channel |
| SC |
Subscriber Communicator |
| SCADA |
Supervisory Control and Data Acquisition |
| SCART |
Syndicat des Constructeurs d'Appareils Radio Recepteurs et Televiseurs |
| SCC |
Satellite Control Centre |
| SCC |
System Control Centre |
| SCCN |
System Co-ordination and Control Network |
| SCF |
Satellite Control Facility |
| SCOE |
Specialised Check Out Equipment |
| SCPC |
Single Channel Per Carrier |
| SCPDM |
Suppressed Clock Pulse Duration Modulation |
| SCR |
Silicon Controlled Rectifier |
| SCS |
System Control Segment |
| SCTO |
Stalled Call Timed Out |
| SCU |
Satellite Communications Unit |
| SCWHP |
Space Copper Water Heat Pipe |
| SD |
Speech Detector |
| SDA |
Space Domain Awareness |
| SDC |
Secondary DAMA Controller |
| SDCU |
Satellite Delay Compensation Unit |
| SDF |
Supergroup Distribution Frame |
| SDH |
Synchronous Digital Hierarchy |
| SDI |
Serial Digital Interface |
| SDL |
Specification and Description Language |
| SDLC |
Synchronous Data Link Control |
| SDMA |
Space Division Multiple Access |
| SDPSK |
Symmetrical Differential Phase Shift Keying |
| SDS |
Satellite Data Services |
| SDTV |
Standard Definition Television |
| SDU |
Satellite Data Unit |
| SECA |
Société Européene de Controle d'Access |
| SECAM |
Système Electronique Couleur Avec Mémoire (TV standard) |
| SECO |
Second Stage Engine Cut Off |
| SEM |
Space Environment Monitor |
| SEP |
Solar Electric Propulsion |
| SEP |
Spherical Error Probability |
| SES |
Satellite Earthstations and Systems |
| SES |
Severely Errored Seconds |
| SES |
Ship Earth Station |
| SES |
Standard Earth Station |
| SF |
Single Frequency |
| SF |
Static Fire |
| SFD |
Saturation Flux Density |
| SFDR |
Spurious Free Dynamic Range |
| SFN |
Single Frequency Network |
| SGDF |
Supergroup Distribution Frame |
| SGF |
Satellite Ground Facilities |
| SGICD |
Space-Ground Interface Control Document |
| SGSN |
Serving GPRS Support Node |
| SHA |
Sidereal Hour Angle |
| SHE |
Spacecraft Handling Equipment |
| SHF |
Super High Frequency |
| SHLV |
Super Heavy Lift Launch Vehicle |
| SI |
Service Information |
| S-DMB |
Satellite – Digital Multimedia Broadcasting |
| SI |
Speech Interpolation |
| SIA |
Satellite Industry Association |
| SIM |
Subscriber Identity Module |
| SIMP |
Satellite Interface Message Processor |
| SI-SAP |
Satellite Independent – Service Access Point |
| SIT |
Satellite Interactive Terminal |
| SIU |
Signalling Interface Unit |
| SiS |
Sound in Synch |
| SLIP |
Serial Line Internet Protocol |
| SLL |
Satellite Line Link |
| SLR |
Satellite Laser Ranging |
| SLS |
Sidelobe Suppression |
| SMA |
Search Mode Acquisition Procedure |
| SMA |
Semi Major Axis |
| SMATV |
Satellite Master Antenna Television |
| SMC |
Sheet Moulding Compound |
| SMC |
System Monitor Console |
| SMG |
Special Mobile Group |
| SMS |
Satellite Multiservice System |
| SMS |
Short Messaging System |
| SMS |
Subscriber Management System |
| SMT |
Surface Mount Technology |
| SMTP |
Simple Mail Transfer Protocol |
| SMY |
Solar Maximum Year |
| S/N |
Signal to Noise Ratio |
| SNA |
System Network Architecture |
| SNF |
System Noise Figure |
| SNG |
Satellite News Gathering |
| SNMC |
Service Provider Network Management Centre |
| SNMP |
Simple Network Management Protocol |
| SNMS |
Satellite Network Management System |
| SNR |
Signal to Noise Ratio |
| SNT |
System Noise Temperature |
| SOC |
Satellite Operations Centre |
| SOC |
Satellite Operation Complex |
| SOCC |
Satellite Operations Control Centre |
| SoD |
Services on Demand |
| SOF |
Start of TDMA Frame |
| SOI |
Silicon on Insulator |
| SOM |
Start Of Message |
| SORF |
Start of Receive Frame |
| SORMF |
Start of Receive Multiframe |
| SOS |
Space Operation Service |
| SOTF |
Start of Transmit Frame |
| SOTMF |
Satcom On The Move |
| SOTMF |
Start of Transmit Multiframe |
| SoW |
Statement of Work |
| SP |
Service Provider |
| SP |
Space |
| SPAC |
Special Purpose Acquisition Company |
| SPADE |
SCPC PCM Access Demand Assigned Equipment |
| SPC |
Single Parity Check |
| SPC |
Stored Program Control |
| SPCC |
Service Provider Control Centre |
| SPELDA |
Structure Porteuse Externe de Lancement Double Ariane |
| SPI |
Special Position Identification |
| SPL |
Sound Pressure Level |
| SPM |
Signal Processing Modem |
| SPoF |
Single Point of Failure |
| SPRE |
Satellite Position Reporting Equipment |
| SPS |
Signalling, Protocols and Switching |
| SPS |
Standard Positioning Service |
| SR |
Shift Register |
| SRARQ |
Selective Repeat Automatic Repeat Request |
| SRB |
Secondary Reference Burst |
| SRB |
Solid Rocket Booster |
| SRD |
Satellite Receiver Decoder |
| SRE |
Speech Recognition Equipment |
| SRF |
Service Request Flag |
| SRH |
Service Request Handling |
| SRP |
Signal Reference Point |
| SRP |
Supersonic Retro Propulsion |
| SRS |
Space Research Service |
| SRT |
Secondary Reference Terminal |
| SRWI |
Short Range Wireless Interface |
| SS |
Satellite Switching |
| SS |
Signalling System |
| SS |
Speed Spectrum |
| SS7 |
Signalling System No 7 |
| SSA |
Space Situational Awareness |
| SSB |
Single Side Band |
| SSB-SC |
Single Side Band - Suppressed Carrier |
| SSB-SC-AM |
Single Side Band - Suppressed Carrier - Amplitude Modulation |
| SSB-SC-ASK |
Single Side Band - Suppressed Carrier - Amplitude Shift Keying |
| SSB-SC-PAM |
Single Side Band - Suppressed Carrier - Pulse Amplitude Modulation |
| SSC |
Satellite Signalling Channel |
| SSC |
Satellite Situation Centre |
| SSC |
Satellite Switching Centre |
| SSE |
Spread Spectrum Encoder |
| SSFC |
Sequential Single Frequency Code |
| SSG |
Small Signal Gain |
| SSLO |
Solid State Local Oscillator |
| SSM |
Satellite System Monitor |
| SSM |
Secondary Surface Mirror |
| SSMA |
Spread Spectrum Multiple Access |
| SSO |
Sun Synchronous Orbit |
| SSOG |
Satellite System Operations Guide |
| SSP |
Signalling and Switching Processor |
| SSP |
Space Based Solar Power |
| SSPA |
Solid State Power Amplifier |
| SSR |
Steady State Reception Procedure |
| SSRA |
Spread Spectrum Random Access |
| SSSF |
Self Scanner Stop Failure |
| SSSO |
Specialised Satellite Service Operator |
| SST |
Satellite to Satellite Tracking |
| SST |
Space Surveillance and Tracking |
| SS-TDMA |
Satellite Switched Time Division Multiple Access |
| SSTM |
Station to Station Traffic Matrix |
| SSTO |
Single Stage To Orbit |
| SSU |
Secondary Sampling Unit |
| SSU |
Sequential Shunt Unit |
| SSU |
Single Subscriber Unit |
| SSU |
Stratospheric Sounding Unit |
| SSUS |
Solid Spinning Upper Stage |
| ST |
Standard Time |
| ST |
Successful Termination |
| STA |
Spacial Temporary Authorisation |
| STA |
Structural Test Article |
| STAR |
Satellite Telecommunications with Automatic Routing |
| STBY |
Standby |
| STC |
Sub Technical Committee |
| STCC |
Spacecraft Technical Control Centre |
| STDN |
Space Tracking and Data Network |
| STE |
Spacecraft Test Equipment |
| STE |
Supergroup Translating Equipment |
| STL |
Satellite Time and Location |
| STM |
Structural Thermal Model |
| STM |
Synchronous Transport Module |
| STP |
Space Test Program |
| STR |
Symbol Timing Recovery |
| STS |
Space Transportation System |
| STU |
Satellite Terminal Unit |
| SUM |
Software User Manual |
| S-UMTS |
Satellite – Universal Mobile Telephone System |
| SV |
Space Vehicle |
| SVC |
Switched Virtual Circuit |
| SVN |
SubVersioN |
| SVT |
System Verification Test |
| S/W |
Software |
| SW |
Switch |
| SWaP |
Size, Weight and Power |
| SWOF |
Switchover Operation Failure |
| SWR |
Standing Wave Ratio |
| SYLDA |
System de Lancement Double Ariane |
| SYZ |
Synthesiser |
