ECSS Terms and definitions

The Excel sheet with ECSS Definitions from the Active and Superseded ECSS Standards listed in the ECSS DOORS database is her available for download:

–> ECSS-Terms-and-Definitions_sorted_A-Z(exported from DOORS db 0.6-October2017).xlsx


  • "term ""performance""deleted "
  • (final) package
  • (intermediate) package
  • (original) date code
  • (primary) package
  • (quasi) static loads
  • (relifing) date code:
  • (risk) communication
  • (risk) index
  • (risk) management process
  • (risk) reduction
  • (risk) scenario
  • (risk) trend
  • (screw) thread
  • (total) non-ionising dose, (T)NID, or non-ionising energy loss (NIEL) dose
  • 1553 message
  • 24-hour equivalent noise exposure level
  • [launcher] production facilities
  • a turn of wire
  • A-basis design allowable (A-value)
  • a-weighting
  • abbreviated functional test (AFT)
  • aberration of light
  • ablated thickness
  • ablation
  • absolute knowledge error (AKE)
  • absolute performance error (APE)
  • absorbance, A
  • absorbed dose
  • absorptance
  • absorption
  • absorptivity
  • accelerance
  • accelerated testing
  • acceleration factor
  • acceptable weld
  • acceptance
  • acceptance authority media
  • acceptance level
  • acceptance margin
  • acceptance notification
  • acceptance of (risk)
  • acceptance temperature range
  • acceptance test
  • acceptance verification report
  • accident
  • accommodation coefficient
  • accuracy
  • accuracy of measurement
  • achieved availability
  • acknowledge
  • action level
  • active redundancy
  • activity
  • actuator
  • adjustable indenter tool
  • aerodynamic heating
  • ageing
  • agent
  • aggressive environment
  • aided tracking
  • air kerma
  • airborne particle
  • airborne particle cleanliness class
  • albedo
  • alert
  • alert level
  • alignment reference frame (ARF)
  • all fire
  • all weld metal tensile test specimen
  • allowable load
  • allowable temperatures
  • alpha sample
  • aluminium equivalent thickness
  • ambient dose equivalent, H*(d)
  • ambient humidity
  • ambient level
  • ambient temperature
  • anaerobic
  • analysis
  • analytical life
  • angle quantisation error
  • angular increment
  • angular random walk (ARW)
  • angular rate
  • angular rate measurement
  • angular white noise (AWN)
  • annular ring
  • anodizing
  • anomaly
  • anoxic
  • antenna factor
  • antenna farm
  • antenna port
  • antenna RF chain
  • antenna support structure
  • anti-aliasing filter
  • antistatic material
  • AOCS end-to-end tests
  • AOCS functional simulator
  • AOCS mode
  • Ap, Kp indices
  • apparent mass
  • applicable document
  • application process
  • application specific integrated circuit (ASIC)
  • application specific standard products (ASSP)
  • approval
  • approval authority
  • approving authority
  • arc-jet test
  • area analysis
  • area array device (AAD)
  • arm plug receptacle
  • armed
  • array antenna
  • array-fed reflector antenna
  • artwork
  • as-designed
  • as-manufactured
  • as-manufactured hole
  • aseptic
  • ASIC technology
  • aspect angle
  • aspect ratio
  • assembled article
  • assembled PCB
  • assembly
  • assembly house
  • associated test coupon
  • assurance
  • asynchronous data transmission
  • atmospheric albedo neutrons
  • attenuated total reflection
  • attitude and orbit control system (AOCS)
  • audit
  • audit criteria
  • audit evidence
  • auditee
  • auditor
  • auroral zone
  • authorization
  • auto ignition temperature
  • auto modal assurance criterion AutoMAC
  • autofrettage
  • automated optical inspection (AOI)
  • automatic code generation
  • automation
  • autonomous attitude determination
  • autonomous attitude tracking
  • autonomous star tracking
  • availability
  • avionics test bench
  • B-basis design allowable (B-value)
  • back-drilled hole
  • back-drilled via
  • background count
  • background subtraction
  • backward contamination
  • baffle
  • bakeout
  • ball grid array (BGA)
  • barbecue mode
  • bare solar cell
  • base laminate
  • base metal
  • baseline
  • basic copper
  • batch
  • batch (material)
  • batch lot
  • beam divergence
  • beam forming network (BFN)
  • beta sample
  • bias
  • bias instability
  • bifurcated (split) terminal
  • binder
  • bioaerosol
  • biobarrier(s)
  • bioburden
  • bioburden controlled
  • bioburden reduction
  • biocontamination
  • biodiversity
  • biological contamination
  • biological indicators
  • bit
  • bit error rate
  • black box
  • black light illumination
  • blank
  • blind via
  • blind-via-in-pad
  • blister
  • blistering
  • block diagram
  • bolt
  • bonding
  • bondply
  • boresight reference frame (BRF)
  • boss
  • bremsstrahlung
  • bridging
  • bubble
  • bubbles
  • buckling
  • buffeting
  • build-up
  • buried via
  • burning time, tb
  • burst pressure
  • business agreement
  • byte
  • calculated temperature range
  • calibration
  • CAN-ID
  • cap lift
  • capability
  • capillary driven loop (CDL)
  • capillary pumped loop (CPL)
  • cargo
  • cartography
  • cartridge
  • case temperature
  • catastrophic
  • catastrophic hazard
  • category 1 manufacturer
  • category 2 manufacturer
  • category A
  • category B
  • cause
  • cell
  • cell library
  • centralised
  • certification
  • chain
  • change control
  • channel
  • character
  • character level
  • characteristic velocity, C*
  • characterization
  • charge
  • charred thickness
  • chill-down
  • chip
  • circuit
  • cladding
  • class 1 change
  • class 2 change
  • clean area
  • clean zone
  • cleaning
  • cleaning efficacy
  • cleanliness
  • cleanliness (contamination) control
  • cleanliness (of a solid surface)
  • cleanliness and contamination control plan
  • cleanliness controlled area
  • cleanliness level
  • cleanliness requirement specification
  • cleanliness verification
  • cleanroom
  • climatic test
  • clinched-lead termination
  • close visual inspection
  • closed-loop ECLSS
  • co-ordinate modal assurance criterion CoMAC
  • co-planarity
  • coating
  • coating lot
  • code coverage
  • coding
  • coherence function
  • cold flow
  • cold redundancy
  • cold redundant bus
  • cold solder joint
  • collected volatile condensable material (CVCM)
  • collective assembled devices
  • column grid array (CGA)
  • combined loads
  • command
  • command packet
  • commandability
  • commandable vital function
  • commercial component
  • commissioning
  • common cause failure
  • common mode failure
  • common mode voltage
  • communication bus system latency
  • communication device
  • communication frame (CF)
  • communication service
  • compatibility
  • compatibility life
  • compatible
  • competent assessor
  • complex mode indicator function
  • complex mode shape
  • component
  • component bare solar cell
  • component density
  • component lead
  • component type TIDS
  • component type TNIDS
  • composite
  • composite material
  • composite over-wrap
  • composite over-wrapped pressure vessel (COPV)
  • composite over-wrapped pressurized component (COPC)
  • composite over-wrapped pressurized structure (COPS)
  • composite over-wrapped special pressurized equipment (COSPE)
  • composite pressure vessel (CPV)
  • composite pressurized structure (CPS)
  • composite sandwich construction
  • composite structure
  • compound parameter
  • compression
  • concurrent engineering
  • condensable hydrocarbon
  • condition
  • conducted emission (CE)
  • conductive coating
  • conductive layer
  • conductive material
  • conductor
  • confidentiality
  • configurable code
  • configuration
  • configuration baseline
  • configuration control
  • configuration control board
  • configuration definition document
  • configuration document
  • configuration identification
  • configuration item
  • configuration management
  • configuration status
  • configuration status accounting
  • configuration verification
  • configured item
  • confirmation
  • confirmation body
  • conformal coating
  • conformance
  • conformity
  • connection
  • consequence tree
  • constant conductance heat pipe (CCHP)
  • constrained DOF
  • constraint
  • consumer
  • contact angle
  • contact discharge method
  • contact vacuum evaporation batch
  • container
  • containment
  • contaminant
  • contaminant environment
  • contaminant gas
  • contaminate, to
  • contamination
  • contamination budget
  • contamination potential
  • contamination sensitive
  • content addressable memory
  • context of use
  • continuation test
  • continuous slowing down approximation range (CSDA)
  • contract
  • contributing loads
  • control character
  • control code
  • control function
  • control system
  • controlled ambient conditions
  • controlled area
  • controlled environment
  • controlled ICD
  • controlled vacuum conditions
  • coordinate system
  • correct attitude
  • correct attitude threshold
  • corrective action
  • corrective maintenance
  • correlation
  • corridor
  • corrosion
  • corrosion resistant alloys
  • corrosion-resistant aluminium alloys
  • corrosion-Resistant Steel (CRES)
  • cost estimating
  • cost reimbursement contract
  • COTS
  • COTS, OTS, MOTS software
  • coupon
  • cover layer (flexible circuit)
  • coverglass
  • coverglass coating lot
  • coverlay
  • crack
  • crack aspect ratio, a/c
  • crack growth rate
  • crack growth retardation
  • crack tip plastic zone
  • crack-like defect
  • cracked solder joint
  • crazing
  • creep
  • crew
  • crew station
  • crew systems
  • crewed space segment element
  • crimping configuration
  • crimping tool
  • critical
  • critical charge
  • critical crack size
  • critical flaw
  • critical initial defect, CID
  • critical item
  • critical material
  • critical mechanical part
  • critical net
  • critical operation
  • critical path
  • critical pressure
  • critical process
  • critical software
  • critical speed
  • critical stress-intensity factor
  • critical structure
  • critical surface
  • critical track
  • critical zone
  • criticality
  • cross support
  • cross-section
  • cross-strapping
  • cryo-pumping
  • cryogenic control system (CCS)
  • cryogenic temperature range
  • cryostat
  • cumulated angular increments
  • current
  • current overshoot decay time
  • current overshoot recovery time
  • customer
  • cycle
  • cyclic data transmission
  • cyclic loading
  • D-value
  • D-value, D10 value
  • damage tolerance
  • damage tolerance threshold strain
  • damage tolerant
  • damped natural frequency
  • damping
  • data bus system
  • data character
  • data exchange
  • data integrity
  • data origin authentication
  • data rate
  • data report
  • data sheet
  • data signalling rate
  • data-strobe
  • dataset
  • datation
  • de-orbiting
  • de-serialization
  • deactivated code
  • deactivation
  • deadband
  • debubbling
  • decision
  • decision coverage
  • decoding
  • decompression
  • decontamination
  • deep space
  • deep-dielectric charging
  • defect
  • deflagration
  • deformed interconnector
  • degrading factors of environment
  • degrees of freedom
  • delamination
  • deliverable output force (FL)
  • deliverable output torque (TL )
  • delta qualification
  • delta verification
  • departure
  • dependability
  • dependent DOF
  • depressurization
  • depth of discharge (DOD)
  • derating
  • design
  • design allowable
  • design authority
  • design burst pressure
  • design factor
  • design flow
  • design for test (DFT) structure
  • design iteration
  • design limit load (DLL)
  • design load (DL)
  • design parameters
  • design rules check
  • design temperature range
  • design ultimate load (DUL)
  • design ultimate stress
  • design yield load (DYL)
  • design yield stress
  • designer
  • destination
  • destination address
  • destination identifier
  • destination list
  • destructive physical analysis
  • destructive physical analysis (DPA)
  • detail specification
  • detected defect
  • detection time
  • detector
  • detonation
  • detonator
  • detrimental deformation
  • development
  • development step
  • development test prior qualification
  • deviation
  • device
  • device telecommand
  • dew point
  • dewar
  • dewetting
  • DHS core element
  • DHS data interchange bus
  • DHS peripheral element
  • die lot
  • dielectric
  • differential pressure
  • diffuse reflection
  • diffusivity
  • dig
  • dimensioning
  • dimensioning case
  • direct effect
  • direct flux
  • direct manpower cost
  • direct measurement method (DMM)
  • directional dose equivalent
  • discharge coefficient, Cd
  • discipline
  • discolouration
  • discrepancy
  • disinfection
  • displacement damage
  • disposal
  • dissimilar metals
  • dissipative material
  • distribution function f(x,v)
  • disturbed solder joint
  • domain
  • dominant and recessive states of CANbus signals
  • dominant bit level
  • dose
  • dose equivalent
  • dose profile
  • dose rate
  • double insulation
  • downstream
  • draining
  • drilled hole
  • driver
  • driving point residue
  • drops
  • dross
  • dry humidity
  • dry mass
  • dry-out
  • dust
  • dwell time
  • dynamic compliance
  • dynamic load
  • dynamic reduction (also referred as dynamic condensation)
  • dynamic stiffness
  • dynamic wave soldering machine
  • Earth Exploration-Satellite service
  • Earth infrared
  • economic conditions
  • effective D-value
  • effective dose
  • effective length
  • effective mass
  • effective modal mass
  • effective sample area
  • effectiveness
  • efficiency
  • eigenfrequency
  • ejected mass
  • electric thruster
  • electrical bonding
  • electrical clearance
  • electrical connection
  • electrical field
  • electrical rule check
  • electro-explosive device
  • electromagnetic compatibility (EMC)
  • electromagnetic compatibility control
  • electromagnetic environmental effects
  • electromagnetic interference (EMI)
  • electromagnetic interference safety margin (EMISM)
  • electronic processing unit
  • electrostatic
  • electrostatic breakdown
  • electrostatic charge
  • electrostatic discharge
  • electrostatic discharge (ESD)
  • electrostatic discharge sensitive (ESDS)
  • electrostatic shield
  • element
  • elementary function
  • EM quality level hybrid
  • embedded space segment element
  • emergency
  • emission
  • emittance (_)
  • emittance (e)
  • encapsulated bioburden
  • end effect
  • end item
  • end of flight or final mass
  • end of packet marker
  • End of Packet marker (EOP)
  • end tail
  • end-user
  • energetic material
  • energetic particle
  • engine inlet pressure
  • engineering authority
  • engineering model
  • engineering qualification model
  • enhanced low dose rate sensitivity (ELDRS)
  • entity
  • envelope
  • environment
  • environmental control and life support (ECLS)
  • environmental control and life support system (ECLSS)
  • environmental tests
  • equipment
  • equivalent dose
  • equivalent fluence
  • equivalent LET
  • erosive burning
  • Error End of Packet marker (EEP)
  • error index
  • error recovery scheme
  • ESD protected area
  • ESD protective material
  • ESD protective packaging
  • essential function
  • etchback
  • eutectic alloy
  • evaluated process
  • event
  • event report
  • ex-situ measurement
  • exchange level
  • exchange structure
  • exclusion angle (EA)
  • execution notification
  • execution verification report
  • exfoliation
  • existing software
  • exosphere
  • experiment
  • explosive component
  • explosive function
  • explosive subsystem
  • explosive train
  • explosively actuated device
  • exposed surfaces
  • exposure temperature range
  • exposure time
  • extender protocol identifier
  • exterior surfaces
  • external charging
  • external field
  • external interface
  • external pressure
  • extrapolated range
  • F10.7 flux
  • fabrication
  • factor of safety (FOS)
  • fail operational
  • fail safe
  • fail-safe
  • fail-safe structure
  • failure
  • failure cause
  • failure effect
  • failure mode
  • failure mode and effects analysis (FMEA)
  • failure mode, effects and criticality analysis (FMECA)
  • failure propagation
  • failure scenario
  • failure tolerance
  • false attitude
  • false star
  • fastener
  • fatigue
  • fault
  • fault condition
  • fault coverage
  • fault current emission
  • fault current tolerance
  • fault tolerance
  • fault voltage emission
  • fault voltage tolerance
  • feature
  • ferrule
  • fibre
  • fibre failure
  • field cleaning
  • field programmable gate array (FPGA)
  • field strength
  • filler
  • filler metal
  • fillet
  • fine pitch
  • finite element model FEM
  • finite life range
  • firmware
  • Firsov scattering
  • fitting
  • fixed price contract
  • flammability
  • flaw
  • flexibility
  • flexible
  • flexible PCB
  • flight dynamics (FD)
  • flight model
  • flight operations
  • flight segment
  • flight spare
  • floorplan
  • flow control token (FCT)
  • fluence
  • fluid hammer
  • flushing
  • flushing or purging
  • flutter
  • flux
  • flux activity
  • foil
  • foldback current limiter (FCL)
  • forced vibration
  • formal system
  • forward contamination
  • Fourier transformation
  • FOV spatial error
  • FR4
  • fracture critical item
  • fracture limited life item
  • fracture toughness
  • frame
  • franchised distributor
  • free DOF
  • free molecular flow regime
  • free vibration
  • frequency bandwidth
  • frequency coordinator
  • frequency response assurance criterion FRAC
  • frequency response function FRF
  • frozen ICD
  • frozen outputs
  • FTIR spectrometer
  • full cone field of view
  • full functional test (FFT)
  • fully regulated bus
  • function
  • function tree
  • functional analysis
  • functional description
  • functional FMEA
  • functional FMECA
  • functional transducer
  • fundamental resonance
  • fused multiple optical head configuration
  • galling
  • galvanic corrosion
  • gas generators
  • gas-tight area
  • generalized mass
  • generally clean
  • geocentric solar magnetospheric coordinates (GSM)
  • geometrical mathematical model (GMM)
  • glass compression
  • glass meniscus
  • graveyard orbit
  • ground displacement voltage
  • ground plane
  • ground segment
  • ground segment customer
  • ground segment element
  • ground segment equipment
  • ground segment operations
  • ground segment subsystem
  • ground segment supplier
  • ground segment system
  • ground support equipment
  • ground support equipment GSE
  • ground system
  • grounding
  • guidance navigation and control functions (GNC)
  • half-rectangular field of view
  • half-stack
  • haloing
  • handbook
  • handled or handling
  • handling
  • hard coded (or Hardcoded) data
  • hardware FMEA
  • hardware FMECA
  • hardware-software interaction analysis
  • hazard
  • hazard acceptance
  • hazard analysis
  • hazard control
  • hazard elimination
  • hazard manifestation
  • hazard minimization
  • hazard reduction
  • hazard scenario
  • hazard tree
  • hazardous
  • hazardous command
  • hazardous event
  • hazardous fluid container
  • HDL model
  • health status
  • heat affected zone (HAZ)
  • heat dissipation
  • heat flux
  • heat leak
  • heat lift
  • heat pipe (HP)
  • heat pipe diode (HPD)
  • heat sink
  • heat storage
  • heat transport capability
  • heater latching current limiter (HLCL)
  • hemispherical emittance (eh)
  • HEPA particle filter
  • heterosphere
  • high density interconnect (HDI)
  • high frequency PCB
  • high priority command
  • high Priority telecommand (HPC)
  • high priority telemetry
  • high speed signal
  • high temperature range
  • high voltage
  • high-efficiency particulate air filter
  • hole wall pull away
  • homosphere
  • hook terminal
  • host receive buffer
  • host system
  • host transmit buffer
  • hot redundancy
  • hot redundant bus
  • hot spot temperature
  • hot structure
  • housekeeping telemetry
  • HTE
  • human centred design
  • human factors
  • human-machine system
  • hump effect
  • hybrid
  • hybrid circuit
  • hybrid microcircuit
  • hybrid welding
  • hydrogen embrittlement
  • hypergolic propellants
  • hypoxic
  • icicles
  • ICRU Soft Tissue
  • ICRU sphere
  • identification
  • idle data
  • ignition time, tign
  • image download
  • image output time
  • impact
  • impact damage
  • impedance
  • implementation document
  • improper response
  • impulse bit
  • in process correction
  • in-process testing
  • in-situ measurement
  • inadvertent response
  • incident
  • inclusion
  • inclusions
  • independent multiple optical head configuration
  • indication
  • indirect effect
  • indirect flux
  • indirect measurement method (IMM)
  • individual (risk)
  • individual error source
  • induced contaminant environment
  • induced environment
  • induced space environment
  • inertial frame
  • inertial reference frame (IRF)
  • inertial resistance force (FD)
  • inertial resistance torque(TD)
  • information system
  • information/documentation management
  • informative
  • infrared reflector
  • infrared spectroscopy
  • infrared test
  • inhibit
  • initial crack size
  • initial mass
  • initiation
  • initiator
  • initiator user application
  • input axis misalignment
  • input filter charge time
  • input overshoot charge
  • input port
  • input range
  • inspectability
  • inspection
  • instantaneous availability
  • instruction
  • insulation thickness (ej)
  • insulator
  • integrated single optical head configuration
  • integration
  • integration testing
  • integration time
  • intellectual property (IP) core
  • inter-fibre failure
  • interchangeability
  • interconnect defect (ICD)
  • interconnect stress test (IST)
  • interconnected cell
  • interface
  • interface actor
  • interface control document (ICD)
  • interface definition document (IDD)
  • interface end
  • interface identification document
  • interface plane
  • interface requirement document (IRD)
  • interface responsible
  • interfacial connection
  • interlayer
  • internal charging
  • internal dielectric charging
  • internal field
  • internal interface
  • internal pressure
  • interplanetary magnetic field
  • intralayer
  • intrinsic wire strength
  • ion engine
  • ionisable contaminant
  • ionising dose
  • ionising radiation
  • ionizing radiation
  • irradiance
  • isochronous data transmission
  • isochronous service
  • isolating material
  • isotropic
  • IST coupon
  • J2000.0
  • jitter
  • job card
  • joint
  • JTC
  • junction temperature
  • key personnel
  • knowledge error
  • L or L shell
  • L or L-shell
  • L shell
  • laminate
  • lap joint
  • latching current limiter (LCL)
  • latching or locking
  • launch base
  • launch campaign
  • launch complex
  • launch operations
  • launch range
  • launch segment
  • launch segment element
  • launch segment equipment
  • launch segment subsystem
  • launch segment system
  • launch service
  • launch system
  • launch vehicle
  • launcher
  • launcher element
  • launcher stage
  • launcher system
  • lay-length
  • lay-out
  • LCL class
  • LCL switch dissipative failure
  • lead time (supplier delay)
  • leak-before-burst (LBB)
  • lens antenna
  • LET Threshold
  • life cycle
  • life profile
  • lifetime
  • lightning indirect effects
  • limit aero-thermal heat flux
  • limit load (LL)
  • limit temperatures
  • limit testing
  • limited service life items
  • limited-life product
  • line
  • line impedance stabilization network (LISN)
  • linear energy transfer (LET)
  • linear system
  • liner
  • link
  • link destination
  • link interface
  • link receiver
  • link source
  • link transmitter
  • link-character
  • lint-free
  • liquid rocket engine
  • load enhancement factor, LEF
  • load ratio
  • load spectrum
  • loaded mass
  • loading event
  • local design factor (KLD)
  • local SCET
  • locally-critical function
  • logical address
  • logical model
  • logistic delay
  • long duration effect
  • loop heat pipe (LHP)
  • loss of mission
  • lot
  • lot acceptance
  • low voltage differential signalling
  • lubrication
  • lug
  • machine oil
  • machine welding
  • macrocell
  • magnetic local time (MLT)
  • main body
  • maintainability
  • maintenance
  • maintenance book
  • maintenance level of attitude tracking
  • major nonconformances
  • major reconfiguration function
  • manual welding
  • manufacturer
  • margin
  • margin philosophy
  • margin policy factor (KMP)
  • mark
  • mass flow rate
  • mated bioburden
  • material
  • material design allowable
  • maximum cryogenic heat load
  • maximum cryogenic temperature
  • maximum design pressure (MDP)
  • maximum expected acceleration
  • maximum expected acoustic spectrum
  • maximum expected operating pressure (MEOP)
  • maximum expected random vibration spectrum
  • maximum expected shock
  • maximum expected sinusoidal vibration environment
  • Maxwellian distribution
  • Mb/s
  • mean availability
  • mean down time
  • mean free path
  • mean knowledge error (MKE)
  • mean organ absorbed dose
  • mean performance error (MPE)
  • mean range
  • mean time between failures
  • mean time between outages
  • mean time to failure
  • mean time to outage
  • mean time to repair
  • mean up time
  • measling
  • measling/measles
  • measurement date
  • mechanical damage
  • mechanical part
  • mechanical properties
  • mechanical pump driven loop (MPDL)
  • mechanical reference frame (MRF)
  • mechanical testing
  • mechanism
  • membrane filter
  • memory
  • message
  • metadata
  • metal core
  • metal core PCB
  • metallic pressure vessel (MPV)
  • metallic pressurized component (MPC)
  • metallic pressurized structure (MPS)
  • metallic special pressurized equipment (MSPE)
  • meteoroid stream
  • meteoroids
  • Meteorological-Satellite service
  • metric
  • micro-organism
  • micro-yield
  • microvia
  • microvia layers
  • migration
  • mil
  • milling
  • minimum bend radius
  • minimum impulse bit
  • minimum switch-on temperature
  • minor nonconformances
  • mission
  • mission critical
  • mission exploitation
  • mission information
  • mission life
  • mission operations
  • mission operations data
  • mission phase
  • mission products
  • mission-critical function
  • mixture ratio
  • mobility
  • modal analysis
  • modal assurance criterion MAC
  • modal confidence factor MCF
  • modal DOFs (also referred as modal coordinates)
  • modal identification
  • modal parameters
  • modal participation factor
  • modal scale factor MSF
  • modal survey test MST
  • mode
  • mode indicator function MIF
  • mode shape
  • mode transition
  • model
  • model factor (KM)
  • model philosophy
  • modification
  • modified condition and decision coverage
  • molar absorptivity, _
  • molecular column density (MCD)
  • molecular contaminant
  • molecular contamination
  • monitoring
  • multi-layer anti-reflection coating
  • multi-layer circuit board
  • multi-variate mode indicator function MMIF
  • multilayer
  • multilayer PCB
  • multimaster-capable, event-oriented message transmission
  • multipaction
  • multiple bit upset (MBU)
  • multiple cell upset (MCU)
  • multiple star tracking maintenance level
  • multiple-axis configuration
  • nano-Tesla
  • natural environment
  • natural frequency
  • natural space environment
  • near ultraviolet (NUV) radiation
  • necessary bandwidth
  • need
  • net positive suction pressure NPSP
  • netlist
  • network
  • network level
  • nick
  • NIEL or NIEL rate or NIEL coefficient
  • night sky test
  • NMT master
  • NMT slave
  • no fire
  • no-flow prepreg
  • node
  • noise
  • nominal aero-thermal heat fluxes
  • nominal condition
  • nominal cryogenic heat load
  • nominal cryogenic temperature
  • nominal nameplate capacity
  • nominal temperatures
  • non affected thickness(es)
  • non essential loads
  • non-corrosion-resistant aluminium alloys
  • non-corrosion-resistant steel
  • non-critical structure
  • non-functional pad
  • non-hazardous LBB failure mode
  • non-plated hole
  • non-shedding
  • non-volatile residue
  • non-volatile residue (NVR)
  • nonconformance
  • nonconformity
  • normal mode shape
  • normal pitch
  • normal-character
  • normative
  • not operating
  • notching
  • notification
  • nozzle
  • NULL
  • number of layers
  • nut
  • OBCP code
  • OBCP engine
  • OBCP language
  • OBCP step
  • OBCP system
  • object path
  • obscuration factor
  • obscuration factor (OF)
  • observability
  • observable symptoms
  • occupancy states
  • occupied bandwidth
  • octet
  • off-loading
  • off-the-shelf
  • offgassing
  • offgassing product
  • omnidirectional flux
  • on-board autonomy
  • on-board control procedure
  • on-board file system
  • on-board memory
  • on-board monitoring
  • on-board operations procedure
  • on-board operations schedule
  • on-board parameter
  • on-board software
  • one sided tolerance limit
  • open-loop ECLSS
  • operability
  • operating conditions
  • operation
  • operational
  • operational modes
  • operational validation
  • operations
  • operations customer
  • operations nomenclature
  • operations supplier
  • operator error
  • optical head
  • optical system
  • orbital debris
  • organ equivalent dose
  • orthogonality check
  • out-of-band emission
  • outage
  • outgassed quantity
  • outgassing
  • outgassing rate
  • output bandwidth
  • output port
  • output transformation matrix
  • overall (risk)
  • overkill
  • overshield
  • Overview
  • oxygen concentration limit during the combustion of polymeric materials
  • package
  • packaged charge
  • packaging
  • packet
  • packet cargo
  • packet level
  • packing
  • pad
  • panel
  • parameter
  • parameter validity
  • parametric release
  • part
  • partial image download
  • partial pressure
  • particle
  • particle fallout
  • particle size
  • particulate
  • particulate contaminant
  • particulate contamination
  • particulate contamination (PAC)
  • parts engineer
  • parts procurer
  • passivation
  • passive intermodulation product
  • passive intermodulation products (PIM)
  • passive redundancy
  • path address
  • payload
  • PCB manufacturer
  • PCB technology
  • peelable
  • peeling
  • peer-entity authentication
  • performance
  • performance drift error (PDE)
  • performance error
  • performance reproducibility error (PRE)
  • performance test
  • permanent degradation of space segment function
  • permanent mission degradation
  • permanent molecular deposition (PMD)
  • personal dose equivalent (individual dose equivalent)
  • phase margin
  • photovoltaic assembly
  • photovoltaic assembly (PVA)
  • physical channel
  • physical layer operation procedure
  • physical level
  • pick-up
  • pickling
  • piece part
  • pits
  • pixel field of view
  • pixel spatial error
  • planetary protection
  • plasma
  • plasma wind-tunnel
  • plate
  • plated hole
  • plated through-holes (PTH )
  • plated-through hole
  • plugged via
  • plume
  • POGO
  • polarity test
  • polymer
  • population
  • port
  • portability (a quality characteristic)
  • positive control
  • positive indication of status
  • positively locked
  • post weld sample
  • potential fracture critical item, PFCI
  • potting compound
  • power quality requirements
  • pre-cleaning
  • pre-heating time
  • pre-test analysis
  • precision cleaning
  • preconditions body
  • predicted temperature range
  • preliminary ICD
  • prepreg
  • preservation
  • pressurant
  • pressure component (PC)
  • pressure drop coefficient
  • pressure vessel (PV)
  • pressurization
  • pressurized hardware (PH)
  • pressurized structure (PS)
  • pressurized system
  • preventive action
  • preventive maintenance
  • primary cell or battery
  • primary discharge
  • primary function
  • primary structure
  • priming
  • printed circuit board (PCB)
  • probability of correct attitude determination
  • probability of false attitude determination
  • probability of invalid attitude solution
  • procedure
  • process
  • process control monitor
  • process FMECA
  • process identification document
  • process parameter
  • process performance index
  • procurement authority
  • procurement lot
  • producibility
  • product
  • product assurance
  • product item
  • product life cycle
  • product tree
  • production lot
  • production run
  • project
  • project factor (KP)
  • project requirements document
  • projected peak-to-peak insulation distance
  • projected range
  • proof factor (jproof)
  • proof load
  • proof pressure
  • proof test
  • propagation time
  • propellant
  • propellant gauging
  • propellant mass
  • propulsion system
  • protected structure
  • protection device
  • proto flight test
  • protocol
  • protocol identifier
  • protoflight model
  • protoflight test
  • prototype device
  • prototype test
  • provision
  • proximate orbits
  • pseudo-ECL (PECL)
  • purging
  • pyrogen igniter
  • pyromechanism
  • pyrotechnic device
  • pyrotechnic igniter
  • qualification
  • qualification authority
  • qualification by similarity
  • qualification coupon
  • qualification level
  • qualification margin
  • qualification model
  • qualification temperature range
  • qualification test (system level)
  • qualified parts
  • qualified process
  • quality
  • quality assurance
  • quality characteristics (software)
  • quality control
  • quality factor
  • quality model (software)
  • quality representative
  • quantifiable structure variable
  • quartz crystal microbalance (QCM)
  • R-ratio
  • rack
  • radiant power, P
  • radiated emission (RE)
  • radiation
  • radiation belt
  • radiation design margin (RDM)
  • radiation lot acceptance test (RADLAT)
  • radiation verification test (RVT)
  • radiation weighting factor
  • radiative sink temperature
  • radio frequency (RF)
  • radiofrequency (RF)
  • RadPack
  • ram
  • ram direction
  • random load
  • rate random walk (RRW)
  • rating
  • raw material
  • re-acceptance
  • re-compression
  • re-orbiting
  • re-pressurization
  • re-weld
  • reaction time
  • reader
  • real mode shape
  • real-time
  • receiver
  • recessive bit level
  • recharge ratio (k)
  • reciprocity
  • reciprocity law
  • recovered mass loss (RML)
  • recurring product
  • red-plague
  • redesign
  • reduced functional test (RFT)
  • redundancy
  • redundancy master
  • redundant bus
  • redundant node
  • reference corner
  • reflectance, R
  • reflector antenna
  • reflux mode
  • regression testing (software)
  • relative biological effectiveness (RBE)
  • relative knowledge error (RKE)
  • relative performance error (RPE)
  • reliability
  • relieving loads
  • relifing
  • relifing procedures
  • remaining Factor
  • repair
  • repair welding
  • repeatability
  • repetitive overload
  • reply
  • reply packet
  • report
  • reporting data
  • repository path
  • representative production lot
  • representative sample
  • reprocessing
  • request
  • request for approval (RFA)
  • required factor, Kr
  • requirement
  • requirement traceability
  • residual hazard
  • residual life
  • residual mass
  • residual risk
  • residual strength
  • residual stress
  • resin
  • resin starvation
  • resistance soldering
  • resolution
  • resolved (risk)
  • resolved hazard
  • resonance
  • resonance frequency
  • resonance search
  • resource
  • response
  • response vector assurance criterion RVAC
  • reticule
  • retrigger interval
  • retriggerability
  • retriggerable latching current limiter (RLCL)
  • return flux
  • reusability
  • reverberation time (T60)
  • reversion
  • review
  • review authority
  • review item
  • review item discrepancy (RID)
  • review prerequisite
  • review team
  • review team leader
  • review_-of-_design
  • rework
  • RF chain
  • RF elements
  • RF lens
  • RF reflector
  • rigid
  • rigid body motion matrix
  • rigid double-sided PCB
  • rigid multilayer PCB
  • rigid PCB
  • rigid single-sided PCB
  • rigid-flex double-sided PCB
  • rigid-flex multilayer PCB
  • rigid-flex PCB
  • rigid/flex
  • ripple
  • risk
  • RLCL class
  • robustness
  • rosin
  • rosin-soldered joint
  • rotating machinery
  • router
  • routing
  • routing notification
  • routing switch
  • routing verification report
  • run on and run off tabs
  • safe
  • safe haven
  • safe life
  • safe life structure
  • safe state
  • safe-life
  • safety
  • safety approval authority
  • safety audit
  • safety critical function
  • safety critical mechanism
  • safety management system
  • safety policy
  • safety representative
  • safety risk
  • safety status parameter
  • safing
  • sample de-treat or re-treat
  • sample repair
  • sampling plan
  • scale factor error
  • scale factor non linearity
  • scale factor non linearity error
  • scatter factor
  • scavenging (leaching)
  • scenario propagation time
  • scheduling
  • scrap
  • scratch
  • screening
  • sculptured flex
  • sealed container
  • secondary arc
  • secondary cell or battery
  • secondary characteristic
  • secondary structure
  • security
  • segment
  • selective plating
  • self-signed certificate
  • sensing reference frame (SRF)
  • sensitive devices
  • sensitive item
  • sensitive surface
  • sensitive volume (SV)
  • sensitivity
  • sensitivity analysis
  • sensor settling time
  • separated single optical head configuration
  • sequential
  • sequential firing
  • sequential via
  • sequentially laminated multilayer PCB
  • serialization
  • service
  • service data unit
  • service life
  • service-provider
  • service-user
  • severity
  • severity of safety consequence
  • shank
  • sheet
  • shelf-life
  • shield
  • shipment lot
  • shock load
  • shock response spectrum (SRS)
  • shop traveller
  • side load
  • sign test
  • signal
  • signal analysis
  • signal conditioner
  • signal level
  • signal-to-noise ratio
  • silting
  • simplex
  • simulant
  • single event burnout (SEB)
  • single event dielectric rupture (SEDR)
  • single event disturb (SED)
  • single event effect (SEE)
  • single event functional interrupt (SEFI)
  • single event gate rupture (SEGR)
  • single event hard error (SEHE)
  • single event latch-up (SEL)
  • single event snapback (SESB)
  • single event transient (SET)
  • single event upset (SEU)
  • single layer anti-reflection coating
  • single point failure
  • single star tracking maintenance probability
  • single word multiple bit upset (SMU)
  • single-axis configuration
  • single-event upset (SEU), single-event effect (SEE), single-event latch-up (SEL)
  • singular input
  • sink
  • size of FE model
  • sizing
  • sizing pressure
  • skew
  • skip plating
  • slicing
  • sliver
  • SMAC (Spacecraft Maximum Allowable Concentration)
  • smear
  • soft magnetic material
  • software
  • software component
  • software intensive system
  • software item
  • software observability
  • software problem
  • software product assurance
  • software unit
  • solar absorbance (as)
  • solar absorptance (a)
  • solar absorptance (as)
  • solar array
  • solar cell
  • solar cell anti-reflection coating
  • solar cell assembly
  • solar cell assembly (SCA)
  • solar constant
  • solar energetic particle event (SEPE)
  • solar flare
  • solar panel
  • solar simulation test
  • solder
  • solder balling (solder balls)
  • solder coating
  • solder icicle
  • solder pad
  • solder stand-off
  • solder-cup terminal
  • solderability
  • soldering
  • soldering pad
  • soldering time
  • solid rocket motor
  • source
  • source format
  • space debris
  • space mission
  • Space Operation service (SO)
  • space programme
  • space qualified parts
  • Space Research service (SR)
  • space segment
  • space segment element
  • space segment equipment
  • space segment operations
  • space segment status
  • space segment subsystem
  • space segment system
  • space system
  • space system model
  • space test centre
  • spacecraft
  • spacecraft elapsed time (SCET)
  • spacing
  • spatter
  • special NDI
  • special pressurized equipment
  • special process
  • specific area
  • specific impulse, ISP
  • specification
  • specimen
  • spectral grade
  • spectrum control
  • splice
  • sporadic flux
  • sporicide
  • spurious emission
  • stability
  • stability margin
  • stack
  • stacking
  • stain
  • stakeholder
  • stand-alone space segment element
  • standard
  • standard evaluation circuit
  • standard NDI
  • star image
  • star magnitude
  • star tracking
  • start-up
  • start-up phase
  • statement
  • statement coverage
  • statement of work
  • static
  • static reduction (also referred as static condensation)
  • statistical ensemble
  • statistical process control
  • steady-state availability (asymptotic availability)
  • steady-state vibration
  • stellar reference frame (SRF)
  • step
  • sterile
  • sterility
  • sterility assurance level
  • sterilization
  • sterilization process
  • sticking coefficient
  • stiffness
  • stimulation
  • stimuli
  • stopping power
  • storage
  • storage area
  • storage long duration
  • storage site
  • storage zone
  • stress intensity factor, K
  • stress lines
  • stress relief
  • stress test
  • stress-corrosion
  • stress-corrosion cracking, SCC
  • structural design
  • structural model
  • structural-thermal model
  • structure
  • stud
  • stud termination
  • sub-cooling
  • sub-feature
  • subservice
  • subservice entity
  • subservice provider
  • subservice user
  • substrate
  • subsystem
  • success
  • success criteria
  • sun survivability
  • supplier
  • support segment
  • support system
  • surface accommodation
  • surface charging
  • surface cleanliness of chemicals (SCC)
  • surface cleanliness of particles (SCP)
  • surface cleanliness particles (SCP) classification
  • surface particle concentration
  • surge
  • survival mode
  • susceptibility
  • susceptibility threshold
  • switch-on capability
  • switch-on response time
  • symbol rate
  • sympathetic firing
  • synchronous data transmission
  • synchrotron radiation
  • synergism
  • synoptic display
  • synthetic parameter
  • system
  • system authority
  • system element
  • system engineering
  • system interface temperature point
  • tailoring
  • tape-lift
  • tape-lift sample
  • target
  • target format
  • target user application
  • task
  • tearing interconnector
  • technical data package
  • technical description
  • technical memorandum
  • technical requirements specification
  • technology review board
  • technology samples
  • telecommand
  • telecommand function
  • telemetry
  • telemetry link
  • temperature cycle
  • temperature difference
  • temperature gradient
  • temperature mean deviation (DTmean)
  • temperature reference point (TRP)
  • temperature stability
  • temperature standard deviation (_)
  • temperature uniformity
  • temperature variation
  • temporal noise
  • temporary degradation of space segment function
  • temporary mission degradation
  • terminal
  • terminal post
  • termination point
  • termination/terminal area
  • test
  • test analysis model TAM
  • test antenna
  • test block
  • test campaign
  • test case
  • test design
  • test equipment
  • test facility
  • test factors (KA and KQ)
  • test fluid
  • test pad
  • test pattern
  • test personnel
  • test piece
  • test procedure
  • test process
  • test script
  • test set-up
  • test specimen
  • test vehicle
  • testability
  • tether
  • thermal ambient test
  • thermal balance test
  • thermal component
  • thermal design case
  • thermal mathematical model (TMM)
  • thermal model
  • thermal node
  • thermal performance temperature range
  • thermal protection subsystem (TPS)
  • thermal shunt
  • thermal vacuum test
  • thermo elastic error
  • thermomechanically affected zone (THAZ)
  • thermosphere
  • thick coatings
  • thin film contamination
  • third party
  • threaded fastener
  • threshold limit value
  • threshold stress intensity range, DKth
  • throttling
  • through-bulkhead initiator (TBI)
  • through-going via
  • thrust
  • thrust centroid time
  • thrust chamber assembly (TCA)
  • thrust coefficient, CF
  • thrust misalignment
  • thrust out-centring
  • thrust vector control
  • thruster
  • tile
  • tilt for HP
  • tilt for LHP
  • time reference point
  • time synchronization cycle (TSC)
  • time to current overshoot
  • Time-Code
  • timing parameters
  • tinning
  • tip
  • tissue weighting factor
  • tolerance
  • tombstoning
  • total impulse
  • total ionising dose
  • total ionizing dose level (TIDL)
  • total mass loss (TML)
  • total non-ionizing dose level (TNIDL)
  • toxic
  • toxic hazard index (T)
  • traceability
  • traceability information (trace code)
  • track
  • trackable objects
  • trained inspector
  • tranquilization phase
  • transaction
  • transducer
  • transducer sensitivity
  • transfer line
  • transient
  • transient load
  • transition range
  • transmissibility
  • transmission medium
  • transmittance, T
  • transmitter
  • transport
  • traveller
  • treatment side of foil
  • triboelectric effect
  • tribology
  • trimming
  • trip-off
  • trip-off time
  • triple point
  • turbo pump
  • turret terminal
  • two-phase heat transport equipment (TPHTE)
  • two-phase loop (TPL)
  • ullage volume
  • ULPA particle filter
  • ultimate aero-thermal heat fluxes
  • ultimate cryogenic heat load
  • ultimate cryogenic temperature
  • ultimate design factor of safety (FOSU)
  • ultimate strength
  • ultimate temperature
  • ultrasonic bath
  • ultraviolet reflector
  • uncertainties
  • uncertainty
  • uncoated area
  • uncontrolled humidity
  • underfill
  • undervoltage protection (UVP)
  • unit
  • unit acceptance test temperature range
  • unit internal design temperature range
  • unit qualification test temperature range
  • unit test
  • unreachable code
  • unresolved (risk)
  • unstabilized stainless steel
  • unwanted emissions
  • upper part [A5]
  • upper stage [A5]
  • upstream
  • usability (a quality characteristic)
  • user
  • user application
  • UVP switch-off response time
  • vacuum
  • vacuum ultraviolet (VUV) radiation
  • valid population
  • validated design
  • validated process
  • validation
  • validity
  • validity flag
  • valve manoeuvring time
  • valve response time
  • variable amplitude spectrum
  • variable conductance heat pipe (VCHP)
  • VCM-test
  • venting
  • verification
  • Verification Control Board (VCB)
  • verification level
  • verification matrix
  • verification report
  • via
  • viable particle
  • viscosity
  • visibly clean
  • visibly clean highly sensitive
  • visibly clean plus ultraviolet
  • visibly clean sensitive
  • visibly clean standard
  • visual damage threshold (VDT)
  • visual inspection
  • vital function
  • vital telecommand
  • void
  • voids
  • volatile hydrocarbon
  • wafer lot
  • waiver
  • waiver request
  • wake
  • wake direction
  • walk-through
  • warm-up duration
  • watchdog body
  • watchdog step
  • water hammer
  • water vapour regained (WVR)
  • wave number, v
  • wave soldering
  • wave-soldering equipment
  • weave exposure
  • weave texture
  • weld heat affected zone (HAZ)
  • weld test record
  • welder
  • welding
  • welding inspector
  • welding operator
  • welding procedure specification (WPS)
  • welding supervisor
  • welding verification test plan
  • weldment
  • wetting
  • wicking
  • wire
  • wire-wrapped connection
  • witness sample
  • word
  • work breakdown structure
  • work instruction
  • work package
  • workpiece
  • world magnetic model
  • worm shaped bulge
  • worst case analysis
  • writer
  • X,Y direction
  • yield design factor of safety (FOSY)
  • yield strength
  • Z direction