Did you ever wonder what those strange conglomerations of letters meant? Here's your chance to find out what those NASA acronyms stand for. About Space and Astronomy presents the Guide to NASA Acronyms. From Standard Earth Observation Satellite to Support and Logistics Areas and Shuttle Landing Facility to Shuttle Imaging Microwave System, you'll find them here. This page lists acronyms starting with S. For others, click on the appropriate letter above or below.

[S]

S CHG: Supercharge
S PRES: Star Present
S TRK: Star Tracker
S&A: Science and Application
S&A: Safe and Arm (Device)
S&AD: Science and Applications Directorate
S&E: Science and Engineering (MSFC Directorate)
S-BD: S-Band
S-N: Stress Number
S/0: Shutoff
S/0: Switchover
S/8: Standby
S/A: Spacecraft Adapter
S/A: Safe and Arm
S/A: Scheduled/Actual
S/A: Site Activation
S/A: Subassembly
S/AC: Stabilization/Attitude Control
S/C: Stabilization and Control
S/C: Stripchart (Recorder)
S/C: Subcontractor
S/C: Splitter/Combiner
S/C: Software Contractor
S/C: Signal Conditioner
S/C: Sensor/Controller
S/C: Spacecraft
S/EOS: Standard Earth Observation Satellite
S/F: Safety Factor
S/F: Single Flow
S/G: Strain Gage
S/L: Shop/Laboratory
S/M: Scheduled Maintenance
S/M: Service/Maintenance
S/M: Structural/Mechanical
S/M: Systems management
S/N: Serial Number
S/N: Signal-to-Noise Ratio
S/P: Serial to Parallel
S/P: Signal Processor
S/R: Send and Receive
S/R: Shift Register
S/R: Stimulus/Response
S/S: Samples per Second
S/S: Single Sideband
S/S: Space Shuttle
S/S: Subsystem
S/Sys: Subsystem
S/U: Set Up
S/V: Space Vehicle
S/V: SuPply Valve
S/W: Software
SA: Safing Area
SA: Shaft Angle
SA: Single Access
SA: Site Activation
SA: Subaccount
SA: Supplemental Agreement
SA: Support Area
SAA: Safety Assurance Analysis
SAA: South Atlantic Anomaly
SAAC: Schedule Allocation and Control
SAALC: San Antonio Air Logistics Center
SAAM: Special Air Force Airlift Mission
SAAMA: San Antonio Air Material Area
SAAS: Shuttle Aerosurface Actuator Simulation
SAB: Shuttle Avionics Breadboard
SAB: Spacecraft Assembly Building
SAB: Storage and Assembly Building
SAB: SAC strategic Air Command (USAF)
SACS: SuPport Action Center
SACS: Software Avionics Command SuPport
SACS: Systems Software Avionics Command SuPport
SACS: SAD shuttle Authorized Document
SACS: Spacecraft Attitude Display
SACS: SYstems Allocation Document
SADEC: Spin Axis Declination
SADEC: SAE society of Automotive Engineers
SADEC: SAEF spacecraft Assembly and EncaPsulation Facility
SADEC: SAES
SADEC: stand-Alone Engine Simulator
SADEC: SAFE San Andreas Fault Experiment
SAEF: Spacecraft Assembly and Encapsulation Facility (KSC)
SAG E: Stratospheric Aerosol Gas Experiment
SAG E: SAIL Shuttle Avionics Integration Laboratory
SAIL: Shuttle Avionics Integration Laboratory (JSC)
SAL: Scientific Airlock
SAL: Shuttle Avionics Laboratory
SAL: SALC Sacramento Air Logistics Center
SAM: Shuttle Attachment ManiPulator
SAM: SYstem Activation and Monitoring
SAM: SAMP Shuttle Automated Mass Properties
SAM: SAMS Shuttle Attachment ManiPulator SYstem
SAMSO: Space and Missile SYstems Organization (USAF)
SAMSOR: SAMSO Regulation (now SDR)
SAMTEC: SPace and Missile Test Center (VAF CA)
SAMTEC: Space and Missile Test Center Manual
SAMTO: Space and Missi e Test Organization (VAFE3)
SAND: I
SAP: Site Activation Need Date
SAR: Strain Arrestor Plate
SAR: SafetY AnalYsis Report
SAR: Search and Rescue
SARP: Summary AnalYsis Report
SARP: SafetY AnalYsis RePort for Packaging
SART: Shuttle Astronaut Recruitment Program
SAS: Stimuli Analog Refresh Table
SAS: Solar Array SYstem
SAS: StabilitY Augmentation SubsYstem
SAS: StabilitY Augmented SYstem
SASTP: Stand-Alone Self-Test Program
SAT: "Saturate, Saturated"
SAT: Systems Approach to Training
SATAF: Shuttle Activation Task Force
SATO: Shuttle Attached Teleoperator
SATO: Supply and Transportation Operations
SATS: Shuttle Avionics Test System
SATS: Small Applications Technology Satellite
SAU: Signal Acquisition Unit
SAU: StraP Around Unit
SAVER: Shuttle Avionics Verification and Evaluation
SAWD: Solid Amine Water Desorbed
SB: Space Base
SB: Speed Brake
SB: Synchronization Base
SB: Synchronization Bit
SBA: Seat Back Assembly
SBA: Small Business Administration
SBA: Structure Borne Acoustic
SBAS: S-Band Antenna Switch
SBC: Speed Brake Command
SBCR: Stock Balance and Consumption Report
SBD: Schematic Block Diagram
SBE: Sub-Bit Encoder
SBHC: Speed Brake Hand Controller
SBP: San Luis Obispo (TACAN Station)
SBP: Sonic Boom Panel
SBS: Satellite Business System
SBTC: Speed Brake/Thrust Controller
SBTC: Speed brake/thrust controller
SBX: S-Band Transponder
SC: Scale
SC: Service Charge
SC: Signal Conditioner (S/C preferred)
SC: Statement of Capability
SC: Statement of Compatibility
SC: Support Contractor
SC: Surface Command
SCA: Schedule Change Authorization
SCA: Sequence Control Assembly
SCA: Shuttle Carrier Aircraft
SCA: simulation Control Area
SCA: Sneak Circuit Analysis
SCA: Shuttle carrier aircraft
SCA: Sequence control assembly
SCAMA: Station conferencing and monitoring arrangement
SCAN: Antenna Scan
SCAN: Selected Current Aerospace Notices
SCAPE: Self-Contained Atmospheric Protective Ensembly
SCAPE: Self-contained atmosphere protective ensemble
SCARS: Sneak Circuit Analysis Report Summary
SCAS: Subsystem COMPuter Application Software
SCAT: Space Communication and Tracking
SCATS: "Storage, Checkout, and Transport"
SCB: Specification Control Board
SCB: Simulation Control and Training SYstem
SCB: Schedule Change Board
SCB: Selection Control Board
SCB: Selector Control Box
SCB: Software Control Board
SCBD: Seller's Approved Configuration ase ine
SCC: Standard Cubic Centimeters
SCC: Safety Control Center
SCC: Simulation Control Center
SCCB: Site Configuration Control Board
SCCH: Standard Cubic Centimeters-per Hour
SCD: Source Control Document
SCD: Specification Control Document
SCD: Specification Control Drawing
SCD: Source Control Drawing
SCDA: "Safing, Cooldown, and Decontamination Area"
SCDP: Simulation Control Data Package
SCDR: Software Critical Design Review
SCDR: Shuttle Critical Design Review
SCDR: Seller Critical Design Review
SCDR: Subcontractor Critical Design Review
SCDU: Signal Conditioning and Display Unit
SCE: Signal Conditioning Equipment
SCEA: Signal Conditioning Electronics Assembly
SCF: Sequenced Compatibility Firing
SCF: Satellite Control Facility
SCF: Safing and DeServicing Facility
SCF: Sunnyvale Control Facility
SCF: Spacecraft Control Facility
SCF: Standard Charge Factor
SCF: Standard Cubic Feet
SCF: Statistical Collection File
SCF: Satellite Control Facility
SCFH: Standard Cubic Feet per Hour
SCFM: Standard Cubic Feet per Minute
SCFS: Standard Cubic Feed per Second
SCGSS: Super Critical Gas Storage System
SCHED: "Scheduled, Scheduling"
SCHEM: Schematics
SCIT: Standard Change Integration and Tracking
SCL: Specification Change Log
SCL: Secondary Coolant Loop
SCL: Secondary Coolant Line
SCLM: "Stability, Control, and Load Maneuvers"
SCM: Subsystem Configuration Monitoring
SCM: Subsystem Configuration Management
SCM: Site Configuration Message
SCM: System Control Module
SCM: System control module
SCMB: Development Configuration Management Board
SCMP: System Contractor Management Plan
SCN: Specification Change Notice
SCNP: Preliminary Specification Change Notice
SCNR: Scanner
SCOE: Special Checkout Equipment
SCP: Scanner Control Power
SCP: Specific Candle Power
SCR: Schedule Change Request
SCR: Stripchart Recorders
SCR: Software Change Request
SCR: Sneak Circuit Report
SCRG: SYstem Change Review Group (MSFC)
SCRL: Station Configuration Requirement List
SCRS: Stripchart Recording System
SCRS: Serialized Control and Reporting System
SCRSY: Serialized Control and Record SYstem
SCSG: Strain gauge signal conditioner
SCT: Scanning Telescope
SCU: Signal conditioner unit
SCiM: Standard Cubic Inches per Minute
SCiU: Spacecraft Interface Unit
SCiU: Selector Control Interface Unit
SD: Scaling and DisPlay
SD: Smoke Detector
SD: Space Division (AFSC)
SD: Space Division (Rockwell)
SD: Spare DisPosition
SD: Specification Document
SD L: Standard Distribution List
SD L: Software Development Laboratory
SD/FS: Smoke Detector/Fire SuPpression
SD/FS: SuPPlier Documentation
SD/YVV: SD/Launch Base Div['si'on
SDA: Shaft Drive Axis
SDAF: Solid Rocket Booster Disassembly Facility
SDAF: Source Data Automatic)n
SDB: Shallow Draft Barge
SDC: Shallow Draft Board
SDC: Software DeveloPment COmPuter
SDC: Spares DisPosition Code
SDCL: SuPPlier Documentation Checklist
SDCP: Summary DeveloPment Cost Plan
SDCS: SAIL Data Communications SYstem
SDD: System Design Document
SDD: Software Design Document
SDD: Software DescriPtion Document
SDD: Shuttle Design Directive
SDE: Space Division Evaluator
SDF: System Development Facility (Breadboard)
SDF: Software Development Facility
SDF: Single Degree of Freedom
SDF: Safing and Deservicing Facility
SDG: Supplier Documentation Group
SDH: System Development Handbook
SDH: Software Development Handbook
SDI: Selective Dissemination of Information
SDIF: Software Development and Integration Facility
SDM: Subsystem Design Manuals
SDM: SYstem Definition Manual
SDM: Shuttle Data Management
SDN: Software Development Note
SDP: Supplier Data Package
SDP: Software Development Plan
SDP: Site Data Processor
SDP: Shuttle Data Processor
SDPC: Shuttle Data Processing Complex
SDPC: Shuttle Data Processing Complex
SDR: System Design Review
SDR: Spacelab DisPosition Record (ESA)
SDR: Space Division Regulation
SDR: Software Design Review
SDR: Software Design Requirements
SDRB: SUPPlier Documentation Review Board
SDRB: Software Design Review Board
SDRD: SuPplier Data Requirements Description
SDRD: SuPplier Documentation Review Data
SDRL: Supplier Data Requirements List
SDS: Software Design Specification
SDS: Steering Damping System
SDS: Shuttle Dynamic Simulation (Simulator)
SDSS: Space Division Shuttle Simulator
SDT: Structural Dynamic Test
SDT: Scaling and Display Task
SDT: Shuttle Data Tape
SDTA: structural Dynamic Test Article
SDVF: software DeveloPment and Verification Facilities
SE: support EquiPment
SE&I: System Element
SE&I: SYstems Engineering and Integration
SE/FAC: Support Eq uipm ent/Facility
SEA: Scanning Electrostatic Analysis
SEA: Silicon Elastimeter Ablator
SEACF: support Equipment Assembly and Checkout Facility
SEADS: shuttle Entry Air Data Sensor
SEADS: Shuttle EntrY Air Data System (Subsystem)
SEADS: Shuttle entry air data system
SEAID: SuPport Equipment Abbreviated Items Description
SEAPG: Support Equipment Acquisition Planning Group
SEARCHS: Simulation
SEARCHS: "Shuttle Engineer',ng Approach/Rollout Control Hybrid"
SEB: Scientific Equipment Bay
SEB: Support Equipment Building
SEB: Source Evaluation Board
SEB: SYstems Engineering Branch
SEC: Secondary
SEC: Sequential Events Controller
SEC: Secondary
SECO: Sustainer Engine Cutoff
SECS: Shuttle Events Control
SEE: Standard End Effector
SEE: Special Purpose End Effector
SEE: Subsystem
SEG: Segment
SEI: SuPPort EquiPment Installation
SEI: SYstem Engineering Groundrule
SEICO: SuPPort EquiPment Installation and Checkout
SEICO: System Engineering Instrumentation
SEL: "Select, Selector"
SEM: Seller's Engineering Memo
SEM: Space Environment Monitoring
SEM: System Engineering Management
SEM: Scanning Electron microscope
SEMS: Space Environment Monitor System
SEN: Sensor
SEND: Shared Equipment Need Date
SENS: Sensitivity
SEO: Special Engineering Order
SEOS: Synchronous Earth Observation Satellite
SEP: Separation
SEP: Source Evaluation Panel
SEP: SUPPort Equipment Package
SEPAP: Shuttle Electrical Power Analysis Program
SEPAR: Shuttle Electrical Power Analysis Report
SEPS: Solar Electric Propulsion System
SEQ: "Sequence,Sequencer"
SER: Serial
SERB: Systems Engineering Review Board
SERB: Shuttle Engineering Review Board
SERS: Shuttle Equipment Record System
SERV: Service
SERVO: Servomechanism
SES: SPecial Emphasis Study
SES: Shuttle Engineering Simulation
SESC: Shuttle Events Sequential Control
SESL: Space Environmental Simulation Laboratory
SEUL: Support Equipment Utilization List
SF: Sliding Filter
SF: Signaling Frequency
SF: Selection Filter
SF: Directorate)
SF: "Safe, R and QA (R&QA), and Protective Services (KSC"
SF: Safe
SF: Subcontractor Furnished
SF: Star Field
SF: Static Firing
SF: Scale Factor
SF: Safety Factor
SF-SOO: KSC Safety Operations Office
SFA: Sun Finder Assembly
SFACI: Software Flight Article Configuration Inspection
SFC: Specific Fuel Consumption
SFC: Selection Filter Control
SFCS: Survival Flight Control System
SFD: Crossfeed
SFDS: System Functional Design Specification
SFDT: Site Format Dump Tape
SFEX: Solar Flare X-ray Polarimeter
SFL: Secondary Freon Loop
SFME: Storable Fluid Management ExPeriment
SFO: Space Flight Operations
SFOM: Shuttle Flight Operations Manual
SFOP: Safety Operating Procedure (KSC)
SFP: Summary Flight Plan
SFP: Single Failure Point
SFPA: Single Failure Point Analysis
SFPPL: Short Form Provisioning Parts List
SFPS: Single Failure Point Summary
SFS: Shuttle Flight Status
SFSS: Satellite Field Service Station
SFT: Simulated Flight Test
SFT: Shaft
SFT: Static Firing Test
SFTA: Structural Fatigue Test Article
SFTF: Static Firing Test Facility
SFTWE: Software
SFU: Standard Firing Unit
SFW: Software
SFWE(M): Static Feed Water Electrolysis (Module)
SG: gnal Generator
SG LS: Space Ground Link Station
SGC: abilized Ground Cloud
SGLS: Space-ground link system
SGLSY: Space Ground Link SYstem
SGMT: Simulated Greenwich Mean Time
SGOS: Shuttle Ground Operations Simulation (Simulator)
SGP: Single Ground Point
SGS: Steep Glide Slope
SGSC: Strain Gage Signal Conditioner
SH LD: Shield
SH2: Supercritical Hydrogen
SHA: System Hazard Analysis
SHA: Sidereal Hour Angle
SHAG: Simplified High Accuracy Guidance (Honeywell)
SHDN: Shutdown
SHE: SuPercritical Helium
SHERB: Sandia Human Error Rate Bank
SHF: Super High Frequency
SHLB: Simulation Hardware Load Boxes
SHLDR: Shoulder
SHORAN: Short Range Navigation
SHP: Shaft HorsePower
SHRD: Shroud
SHRD: Supplemental Heat Rejection Devices
SHS: Simulation Hardware System
SHTR: Shutter
SHUTDN: Shutdown
SIA: Software Impact Assessment
SIA: Solar Inertial Attitude
SIA: Shuttle Induced Atmosphere
SID: Standard Interface Document
SID: System Interface Document
SID: Simulator Interface Devices
SID: Shuttle Integration Device
SIE: Shuttle Interface Equipment Services
SIES: "Supervision, Inspection, Engineering, and"
SIG: Signal
SIG CONDR: Signal Conditioner
SIG GEN: Signal Generator
SIL: Systems Integration Laboratory
SIL: Sound Interference Level
SIL: Silver
SILTS: Shuttle Infrared Leeside Temperature Sensing
SILTS: Shuttle infrared leeside temperature sensing
SIMAS: System
SIMAS: Shuttle Information Management Accountability
SIMFAC: Simulation Facility
SIMR: Systems Integration Management Review
SIN: Sine
SIP: SYstems Integration Office
SIP: Strain Isolator Pad
SIP: Scientific Instrument Package
SIP: Separation Instrument Package
SIP: Strain isolation pad
SIPS: Small Instrument Pointing System
SIR: Shuttle Imaging Radar
SIR: System Interface Requirements
SIR: Systems Integration Review
SIR: Software Initiated Restart
SIR-A: Shuttle Imaging Radar@A
SIRR: Software Integration Readiness Review
SISWG: STS Integrated Schedule Working Group
SIT: Software Integrated Test
SIT: Shuttle Interface Test
SIT: Situation
SIT: SSV Integrated Test
SIT: Shuttle Integrated Test
SIU: Signal interface unit
SIVE: Shuttle Interface Verification EquiPment
SKD: "Singer, Kearfott Division"
SL: Sea Level
SL: SPacelab
SL: Shelf Life
SL: Sound Level
SL: Seal
SL&I: System Load and initialization
SL-SS: Spacelab Subsystems
SL-SSS: Spacelab Subsystem(s) Segment
SLA: Support and Logistics Areas
SLA: ERNO Spacelab Product Assurance Department
SLAC: Stanford Linear Accelerator Center
SLAHTS: Stowage List and Hardware Tracking System
SLAK: Spacelab Late Access Kit
SLAM: Side Load Arrest Mechanism
SLAR: Side Looking Airborne Radar
SLC: Space Launch Complex
SLC: ERNO SPacelab Project Control
SLCA: ERNO Spacelab Contract Administration
SLCC: ERNO Spacelab Configuration Management
SLCL: ShoP/Lab Configuration Layout
SLD: Stiff-Leg Derrick
SLE: ERNO Spacelab Engineering
SLEMU: SPacelab Engineering Model Unit
SLF: Shuttle Landing Facility (OLF)
SLF: Shuttle landing facility (KSC)
SLI: ERNO Spacelab Integration and Test
SLL: Shelf Life Limit
SLM: Sound Level Meter
SLN: ERNO SPacelab Payload
SLO: ERNO Spacelab Operations
SLOS: Star Line of Sight
SLP: ERNO Spacelab Program Office
SLPB: Spacelab Program Board
SLRV: Shuttle Launched Research Vehicle
SLS: Secondary Landing Site
SLS: Sortie Lab Simulator
SLS: Spacelab Simulator
SLS: Statement Level Simulator
SLS: Spacelab simulator
SLSA: Shuttle Logistics Support Aircraft
SLSMS: Spacelab Support Module Simulator
SLT: ERNO Spacelab Technology
SLV: Space Launch Vehicle
SM ES: "Shuttle Mission Eng',neering Simulator"
SM ES: Shuttle Mission Evaluation Simulation (Simulator)
SM IA: Serial Multiplexer Interface Adapter
SM&S: Systems Management and Sequencing
SM/PM: System Management/Performance Monitor
SMAB: Solid Motor Assembly Building
SMAB: Solid Motor Assembly Building
SMAG: Star Magnitude
SMART: Shuttle Meeting Action - Item Review Tracking
SMB: Space Meteorology Branch
SMCH: Standard Mixed Cargo Harness
SMD: Special Measuring Device
SMD: Special Measuring Service
SMD: Spacelab Mission DeveloPment
SMDC: Shielded Mild Detonating Cord
SMEAR: Span/Mission Evaluation Action Request
SMG: Superconduction Magnetic Energy Storage
SMG: SPaceflight Meteorology Group
SMIR: Shuttle Multispectral Infrared Radiometer
SML: Structure Mold Line
SMMD: Specimen Mass Measurement Device
SMP: software Management Plan
SMPM: Structural Materials Property Manual
SMPTRB: Shuttle Main Propulsion Test Requirement Board
SMQ: structure Module Qualification Test
SMR: "source, Maintenance, and RecoverabilitY (Code)"
SMRD: Spin Motor Rotational Detector
SMRD: Spin Motor Run Discrete
SMRM: solar Maximum Repair Mission
SMS: Shuttle mission simulator
SMSi: Standard Manned Space Flight Initiator
SMT: Selective Message Transaction
SMTAS: Shuttle Model Test and Analysis System
SMU: Speaker/microphone unit
SMVP: Shuttle Master Verification Plan
SMVRD: Shuttle Master Verification Requirements Document
SNF: SYstem Noise Figure
SNR: Signal-to-Noise Ratio
SNSO: Space Nuclear SYstems Office
SNSR: Sensor
SO FT: Square Feet
SOA R: Shuttle Orbital Applications and Requirements
SOARS: Shuttle Operation Automated Reporting System
SOATS: SLPport Operation Automated Training System
SOCA R: Shuttle Operational Capability Assessment Report
SOCH: Spacelab Orbiter Common Hardware
SODB: Shuttle Operational Data Book
SODB: Start of Data Block
SODS: Shuttle Operational Data System
SODS: Skylab Orbit-Deorbit System
SOF: Safety of Flight
SOFI: Spray-on Foam Insulation
SOFT: Space Operations and Flight Techniques
SOH: Start of Heading
SOL: Solar
SOL: Solenoid
SOL: Squelch
SOLN: Solution
SOMF: Start of Minor Frame
SOMS: Shuttle orbiter medical system
SOMS: Shuttle orbiter medical system
SOP: Secondary Oxygen Pack
SOP: Spacelab OPportunity Payload
SOP: Subsystem(s) Operating Procedure
SOP: Systems Operation Plan
SOP: Standard Operating Procedure
SOP: Subsystem operating program
SOPC: Shuttle Operations Planning Complex
SOPC: Shuttle Operations and Planning Center
SOR: "Stable Orbit Rendez,o,s"
SOR: Specification Operational Requirement
SORPTR: South Repeater
SORTIE: Short Term Mission
SOT: Strap-on Tank
SOTS: Suborbital Tank Separation
SP: Shoulder Pitch
SP: Shuttle Projects Office (KSC)
SP: Signal Processor
SP: Single Pole
SP: Single Precision
SP: Solar Physics
SP: Spare
SP: Spin
SP: Standard or Peculiar
SP: Static Pressure
SP&S: Special Processes and Sequencing
SP-AF: Air Force STS Liaison Office (KSC Shuttle)
SP-AF: Air Force Support Office (KSC)
SP-FGS: Flight and Ground Systems Office (KSC Shuttle)
SP-ILS: Integrated Logistics Support Office (KSC Shuttle)
SP-LMO: Logistics Management Office (KSC)
SP-OPI: OPerations Planning and Integration Office (KSC
SP-OPI: Shuttle)
SP-OSO: Off-Site Offices (KSC Shuttle)
SP-PAI: Project Assessment and Integration Staff (KSC)
SP-PCO: Program Control Office (KSC Shuttle)
SP-PMS: Performance Management Systems Office (KSC)
SP-SMO: Site Management Office (KSC Shuttle)
SPA: Space Processing Application
SPA: Signal Processor Assembly
SPA: Shared Peripheral Area
SPA: Servo Power Amplifier
SPA: S-Band Power Amplifier
SPA: Signal processor assembly
SPA: Steering position amplifier
SPACE: Spacecraft Prelaunch Automatic Checkout Equipment
SPAD: Subsystem Positioning Aid Device
SPAD: Shuttle Payload Accommodation Document
SPADS: Shuttle Problem Analysis Data System
SPADS: Shuttle Problem Action Data System
SPAF: Simulation Processor and Formatter
SPAH: Spacelab Payload Accommodations Handbook
SPAN: Spacecraft Analysis
SPART: Space Research and Technology
SPAS: Shuttle Pallet Satellite (German)
SPC: Starting Point Code
SPC: Shipping and Packing Cost
SPC: Stored Program Command
SPC: Synoptic Properties Code
SPC: Shuttle processing contractor
SPCC: STS Processing Control Center
SPCU: Simulation Process Control Unit
SPCW: Stored Program Command Word
SPD: Standard Practice Directive
SPD: Speed
SPD R: Software Preliminary Design Review
SPDB: Subsystem Power Distribution BC)x
SPDBK: Speed Brake
SPDCI: Standard Payload Display and Control Interface
SPE: Solid Polymer Electrolysis
SPE: Static Phase Error
SPEC: Specialist Function
SPEC: Specification
SPECT: Spectrometer
SPEE: Special Purpose End Effector
SPF: Single Point Failure
SPF: Software Production Facility
SPF: Spacelab Processing Facility
SPFA: Single Point Failure Analysis
SPFP: Single Point Failure Potential
SPG: Signal Point Ground
SPG: Single Point Ground
SPHER: Spherical
SPI: Surface Position Indicator
SPI: Surface position indicator
SPIAP: Shuttle/Payload Integration Activities Plan
SPICE: SPacelab Payload Integration and Coordination in
SPICE: Europe
SPIDF: Support Planning Identification File
SPIDPO: Office (JSC)
SPIDPO: Shuttle Payload Integration and Development Progra
SPIDPO: Shuttle Payload Integration and Development Program Office
SPIF: Standard Payload Interface Facility
SPIF: Shuttle Payload Integration Facility
SPII: Shuttle Program Implementation Instruction
SPIMS: Shuttle Program Information Management System
SPKB: Speed Brake
SPKR: Speaker
SPL: Scratch Pad Line
SPL: Serialized Parts List
SPL: Sound Pressure Level
SPL: System Programming Language
SPLX: Simplex
SPLY: Supply
SPM: Subsystem Project Manager
SPMS: Special Purpose Manipulator System
SPN: Shuttle Project Notice (KSC)
SPND: Suspend
SPO: Spare Parts Order
SPO: Shuttle Projects Office
SPO: SYstem Program Office
SPOC: Shuttle Payload Operations Contractor
SPOM: STS Planning and Operations Management
SPP: Simulation Planning Panel
SPP: Solar Physics Payload
SPPIL: Shuttle Preferred Pyrotechnic Items List
SPPL: Spare Parts Provisioning List
SPPP: Spacelab Payloads Processing Project
SPR: Software Problem Report
SPR: Subcontractor Performance Review
SPRAG: STS Payloads Requirements and AnalYsis Group
SPRT: Sequential Probability Ratio Test
SPS: Service Propulsion Subsystem
SPS: Shuttle Procedures Simulator
SPS: Statement of Prior Submission
SPS: Samples per Second
SPS: Secondary Propulsion System
SPS: Solar Power Satellite
SPT: Support
SPT: Steering position transducer
SPTD: Supplemental Provisioning Technical Documentation
SPVPF: Shuttle Payload Vertical Processing Facility
SR: Statement of Requirements
SR: Sunrise
SR: Status Register
SR: Status Report
SR: Status Review
SR: Support Request
SR: Standard Repair
SR: Shift Register
SR: Scan Ratio
SR: Support Room
SR&Q: "Safety, Reliability, and Quality"
SR&QA: "Safety, Reliability, and Quality Assurance"
SRA: Spin Reference Axis
SRA: Support Requirements Analysis
SRAG: Space Radiation Analysis Group
SRB: Solid Rocket Booster
SRB: Solid rocket booster
SRBAB: SRB Assembly Building
SRBDF: SRB Disassembly Facility
SRBPF: Solid Rocket Booster Processing Facility
SRC: Sample Return Container
SRCB: Software Requirements Change Board
SRCB: Software Requirements Control Board
SRCBD: Software Requirements Change Board Directive
SRCBD: Software Requirements Control Board Directive
SRCH: Search
SRD: Shuttle Requirements Definition
SRD: Shuttle Requirements Document
SRD: SYstems Requirements Document
SRDH: Subsystems Requirement Definition Handbook
SRDH: System Requirements Definition Handbook
SRE: STDN Ranging Equipment
SRF: Shuttle Refurbishment Facility
SRH: Subsystems Requirements Handbook
SRM: Standard Reference Material
SRM: SPecification Requirements Manual
SRM: Solid Rocket Motor
SRM: Solid rocket motor
SRMC: Stimulus/Response Measurements Catalog
SRN: Software Release Notice
SRO: Supervisor Range Operations
SRPA: Spherical Retarding Potential Analyzer
SRR: Site Readiness Review
SRR: Shuttle Requirements Review
SRR: Software Requirements Review
SRR: System Requirements Review
SRS: Software Requirements Specification
SRS: Simulated Remote Station
SRS: Support Requirements System
SRS: Specification Revision Sheet
SRSF: SRB Refurbishment and Subassembly Facility
SRSF: SRB Receiving and Subassembly Facility
SRSR: Schedule and Resources Status Report
SRSS: Shuttle Range Safety System
SRT: Supporting Research and Technology
SRT: Station Readiness Test
SRT: Specification Requirements Table
SRT: Special Rated Thrust
SRT: Shuttle Requirements Traceability
SRU: Space Replaceable Units
SRU: ShOP-Replaceable Unit
SRU: Shop Replacement Unit
SRVL: Survival
SS: System Software
SS: Single String
SS: Subsystem
SS: Station Set
SS: Space Station
SS: System Summary
SS: Space Shuttle
SS: System Specification
SS: Sunset
SS: Shuttle System
SS: Single Sideband
SS&A: Space Systems and Applications
SSA: S-Band Single Access
SSA: Shuttle Simulation Aircraft
SSA: Space Suit Assembly
SSA 1/0: GCOS Program Element Name
SSAT: SPace Shuttle Access Tower (now FSS)
SSAT: Shuttle Service and Access Tower
SSB: Single Sideband
SSB: Source Selection Board
SSBC: Summary Sheet Bar Chart
SSC L: Shuttle System Commonality List
SSCA: Surface Sampler Control Assembly
SSCHS: Space Shuttle Cargo Handling System
SSCP: Small Self-Contained Payloads
SSCSP: Space Shuttle Crew Safety Panel
SSD: Spacecraft Software Division
SSD: System Summary Display
SSDD: Software System Design Document
SSDH: Subsystem Data Handbook
SSDS: Space Station Data System
SSE: Space Shuttle Engines
SSE: Subsystem Element
SSE: SubsYstem Support Equipment
SSEOS: Space Shuttle Engineering and Operations Support
SSF: SRB Storage Facility
SSFGSS: Space Shuttle Flight and Ground System Specification
SSFL: Santa Susana Field Laboratory
SSFS: Space Shuttle Functional Simulator
SSHB: Station Set Handbook
SSIBD: Shuttle System Interface Block Diagram
SSID: Shuttle Stowage Installation Drawing
SSIP: Systems Software Interface Processing
SSITP: Shuttle System Integrated Test Plan
SSL: System Software Loader
SSM B: Space Shuttle Maintenance Baseline
SSM E: Space Shuttle Main Engine
SSM EC: Space Shuttle Main Engine Controller
SSME: Space shuttle main engine
SSMECA: Space Shuttle Main Engine Controller Assembly
SSMECA: SSM E Controller Assembly
SSOP: Space Systems Operating Procedure(s)
SSP: Standard Switch Panel
SSP: Space Shuttle Program
SSP: Small Sortie Payload
SSPC: Spacelab Stored Program Command
SSPD: Shuttle System Payload Data
SSPD: Shuttle System Payload Description
SSPD: Shuttle System Payload Definition (Study)
SSPDA: Space Shuttle Payload Data Activity
SSPDB: Subsystem Power Distribution Box
SSPDS: Space Shuttle Payload Data Study
SSPGSE: Space Shuttle Program Ground Support Equipment
SSPM: Space Shuttle Program Manager
SSPO: Space Shuttle Program Office
SSPP: SYstem Safety Program Plan
SSPPSG: Space Shuttle Payload Planning Steering Group
SSPRO: Space Shuttle Program Resident Office
SSPS: Space Shuttle Program schedule
SSPTF: Santa Susana Propulsion Test Facility (see SSFL)
SSR: Shop Support Request
SSR: Station Set Requirement
SSR: System Requirements Review
SSR: Staff SuPport Room
SSRD: Station Set Requirements Documents
SSRN: System Software Reference Number
SSRR: Station Set Requirements Review
SST: Single System Trainer
SST: Subsystem Terminal on Spacelab
SST: Structural Static Test
SST: SPacecraft Systems Test
SSTC: Space Shuttle Test Conductor
SSUS-A: SSUS for Atlas-Centaur Class Spacecraft
SSUS-D: SSUS for Delta Class Spacecraft
SSUSP: Spinning Solid Upper Stage Project
SSiS: Space Station Information System
ST: Star Tracker
ST: Spacelab Technology
ST: SPace Telescope
ST: Static
ST: Sequential Timer
ST: Special Tooling
ST: Self Test
ST: Starter
ST: SimPlification Task
ST: Structural
ST: Star tracker
STA: Static Test Article
STA: Station
STA: Structural Test Article
STA: Shuttle Training Aircraft
STA: Structural test article
STA R: Scientific and Technical Report
STA R: Shuttle Turnaround AnalYsis Report
STAB: "Stabilize, Stabilizer"
STADAC: Station Data Acquisition and Control
STADAN: Satellite Tracking and Data Acquisition Network
STADAN: Space Tracking and Data Acquisition Network
STADN: Space Tracking and Acquisition Network
STADU: System Termination and Display Unit
STAG: Shuttle Turnaround AnalYsis Group
STARR: "Schedule, Technical, and Resources Report"
STAT: Status
STAT: Statistics
STBD: Starboard
STBY: Standby
STC: Standard Test Configuration
STC: Systems Test Complex
STC: Spacecraft Test Conductor
STC: Satellite Test Center
STCP: Short-Term Cost Plan
STD: Standard
STD: Shuttle Test Director
STD L: Standard Distribution List (letter denoting which list
STD L: follows)
STDN: Spaceflight Tracking and Data Network
STDN: Space Tracking and Data Network
STDN: Space flight tracking and data network
STDY: Steady
STE: Special Test EquiPment
STE: System Test Engineer
STF: Spin Test Facility (see DSTF)
STF: Structural Fatigue Test
STG: Stage
STIL: Software Test and Integration Laboratory
STIRD: SAIL Test Implementation Requirements Document
STL: Space Technology Laboratories
STLOS: Star Line of Sight
STM: Signal Termination Module
STM: Static Test Model
STM: Support Test Manager
STN: Software Trouble Note
STO: Stow
STOCC: Space Telescope Operations Control Center
STP: Space Test Program
STP: Self-Test Program
STP: Shuttle Technology Panel
STP: Subsystem Test Plan
STP: Space Technology Payload
STPH: Static Phase Error
STR: Structure
STR: System Test Review
STR L: Structural
STRB: Strobe
STRCH: Stretch
STRFLD: Star Field
STRG: Steering
STRG: String
STRUC: Structure
STRUCT: Structure
STS: Structural Transition Section
STS: Space Transportation System
STS: Shuttle Test Station
STS: Space transportation system
STS R: System Test Summary Report
STSG: Shuttle Test Group
STSOPO: Off ice (JSC)
STSOPO: Shuttle Transportation Systems Operations Program
STT: Spacelab Transfer Tunnel
STU: Special Test Unit
STU: Star Tracker Unit
SUB: Substitute
SUBJ: Subject
SUMS: Shuttle upper atmosphere mass spectrometer
SUP: Supply
SUP: Support
SUPCRIT: Supercritical
SUPPR: Suppression
SUPSALV: Supervisor of Salvage (U.S. Navy)
SUPT: Support
SUPV: Supervisor
SURE: Shuttle Users Review and Evaluation
SURF: Surface
SURS: Standard Umbilical Retraction System
SUTAGS: Shuttle Uplink Text and Graphics Scanner
SVA&C: Shuttle Vehicle Assembly and Checkout
SVAB: Shuttle Vehicle Assembly Building
SVAC: Shuttle Vehicle Assembly and Checkout (Facility)
SVAFB: South Vandenberg Air Force Base
SVB: Shuttle Vehicle Booster
SVB: Space Vehicle Booster
SVDS: Space Vehicle Dynamic Simulator
SVRR: Software Verifir-ation Readiness Review
SW/PM: System Management/Performance Monitor
SWA: Support Work Authorization
SWAA: "SPacelab Window Adapte, Assembly"
SWAD: Subdivision of Work Authorization Document
SWAT: Stress Wave Analysis Technique
SWG: Software Working Group
SWOB: "Salaries, Wages, Overhead, and Benefits"
SWP: Safe Working Pressure
SWR: Standing Wave Ratio
SWT: Supersonic Wind Tunnel
SWT: Sextant
SXT: Sextant
SY: System
SY: Shoulder Yaw
SYM: Symbol
SYMM: Symmetrical
SYN: Synthetic
SYN: Synchronous
SYNC: Synchronize
SYNCOM: Hughes Spin Stabilized Spacecraft
SYNCOM: Synchronous Communication Satellite (Hughes)
SYS: System
SYSTRAN: Systems Analysis Translator
SiMCOM: Simulation Complex
Sims: Shuttle Inventory Management System
Sims: Shuttle Imaging Microwave System
Sols: Spacelab/Orbiter Interface Simulator
Station (KS: Station (KSC)

For more NASA acronyms, select a letter below or at the top of the page to continue with the About Astronomy and Space Guide to NASA Acronyms.