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Space Assigned Number Authority(SANA) Registry

CCSDS Abbreviations

XML version of this registry
Created
2012-01-13
Last Updated
2015-04-07
Registration Policy
TBD
Registration Form
A new registration can be requested by completing this form.
Review authority
SEA
Signature
md5
I have reviewed all my changes.
Abbreviations References
16APSK
16-ary Amplitude and Phase Shift Keying
[131.3‑B‑1]
3-DES
Triple Data Encryption Standard
[350.0‑G‑2]
32APSK
32-ary Amplitude and Phase Shift Keying
[131.3‑B‑1]
3DES
Triple DES or triple DES
[350.2‑G‑1][350.0‑G‑2]
3GPP
Third-Generation Project
[313.0‑Y‑1]
720.3-G-1
Store and Forward Overlay
[Secretariat]
8PSK
8-ary Phase Shift Keying
[131.3‑B‑1]
AAC
Advanced Audio Coding
[706.1‑G‑1]
AAMS
Application AMS
[735.0‑G‑1][735.1‑B‑1][875.0‑M‑1]
ACI
Adjacent Channel Interference
[880.0‑G‑1]
ACK
Positive Acknowledgment
[727.0‑B‑4][720.1‑G‑3]
ACK or Ack
Acknowledgment or Acknowledgement
[875.0‑M‑1][880.0‑G‑1][714.0‑B‑2]
ACL
Access Control List
[350.4‑G‑1]
ACM
Adaptive Coding and Modulation
[131.2‑B‑1][131.3‑B‑1][131.4‑M‑1]
ACQ or Acq
Acquisition
[401.0‑B‑22]
AD
Acceptance Check (Bypass Flag = 0) and Data (Control Command Flag = 0)
[232.1‑B‑2]
AD
Area Director
[A02.1‑Y‑3]
ADC
Automated Data Collection
[880.0‑G‑1]
ADC
Automatic Data Capture
[880.0‑G‑1]
ADI
Authority and Data Descriptive Record Identifier
[610.0‑G‑5]
ADID
Authority and Description Identifier
[620.0‑B‑2][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1][643.0‑B‑1][644.0‑B‑3][645.0‑G‑1][646.0‑G‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][A31.0‑G‑1]
ADID
Authority Description Identifier
[621.0‑G‑1]
ADM
Attitude Data Message
[503.0‑B‑1][504.0‑B‑1][A01.2‑Y‑4.1][505.0‑B‑1]
ADR
Adaptive Data Rate
[740.0‑G‑1]
ADU
Application Data Unit
[620.0‑B‑2][621.0‑G‑1][645.0‑G‑1]
AE
Application-Entity
[910.2‑G‑1]
AEAD
Authenticated Encryption with Associated Data
[352.0‑B‑1]
AEM
Attitude Ephemeris Message
[504.0‑B‑1][505.0‑B‑1]
aem
Attitude Ephemeris Message tag
[505.0‑B‑1]
AES
Advanced Encryption Standard
[350.0‑G‑2][350.2‑G‑1][350.8‑G‑1][352.0‑B‑1]
AGC
Automatic Gain Control
[401.0‑B‑22][413.0‑G‑2][415.0‑G‑1]
AGVE
Air-Ground Voice Equipment
[706.2‑G‑1]
AIC
Archival Information Collection
[650.0‑M‑2]
AIF
Application Interface
[914.0‑M‑1]
aIMO
Advanced Information Management Object
[312.0‑G‑1]
AIO
Application Information Object
[312.0‑G‑1]
AIP
Archival Information Package
[312.0‑G‑1][650.0‑M‑2][651.0‑M‑1][651.1‑B‑1][652.0‑M‑1][661.0‑B‑1]
AIT
Assembly, Integration, and Test
[880.0‑G‑1]
AIU
Archival Information Unit
[650.0‑M‑2]
AIV
Assembly, Integration Verification
[660.0‑G‑1]
AIV
Assembly-Integration-Verification
[880.0‑G‑1]
AL
Authentication Layer
[913.1‑B‑1][914.1‑G‑1]
ALC
automatic level control
[414.1‑B‑1]
ALP
Application Layer Protocol
[714.0‑B‑2]
ALT
Altitude
[500.0‑G‑3]
AM
Amplitude Modulation
[401.0‑B‑22][880.0‑G‑1]
AM/AM
Amplitude-dependent amplitude distortion
[413.0‑G‑2]
AM/PM
Amplitude-dependent phase distortion
[413.0‑G‑2]
AMQP
Advanced Message Queuing Protocol
[520.0‑G‑3]
AMS
Asynchronous Message Service
[735.0‑G‑1][735.1‑B‑1][850.0‑G‑1][875.0‑M‑1]
AMS
Asynchronous Messaging Service
[734.0‑G‑1][520.0‑G‑3][734.0‑G‑1]
AMS
CCSDS Asynchronous Message Service
[520.1‑M‑1]
ANSI
American National Standards Institute
[311.0‑M‑1][610.0‑G‑5][621.0‑G‑1][880.0‑G‑1]
ANSI
(deprecated) American National Standards Institution
[620.0‑B‑2]
AOCS
Attitude and Orbit Control Software (application)
[875.0‑M‑1]
AOS
Advanced Orbiting Systems
[123.0‑B‑1][130.0‑G‑2][130.2‑G‑2][131.0‑B‑2][131.2‑B‑1][131.3‑B‑1][133.1‑B‑2][230.1‑G‑2][311.0‑M‑1][350.0‑G‑2][700.0‑G‑3][702.1‑B‑1][722.1‑M‑1][727.0‑B‑4][740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.14‑G‑1][910.3‑G‑3]
AP
Access Point
[880.0‑G‑1]
APD
Avalanche Photodiode
[880.0‑G‑1]
API
Application Program Interface
[311.0‑M‑1][714.0‑B‑2][910.0‑G‑2][910.0‑Y‑2][913.1‑B‑1][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][915.5‑M‑1][916.1‑M‑1][916.3‑M‑1]
API
Application Programmer’s Interface
[520.0‑G‑3]
API
Application Programming Interface
[312.0‑G‑1][520.1‑M‑1][521.0‑B‑2][521.1‑B‑1][523.1‑M‑1][650.0‑M‑2][850.0‑G‑1][880.0‑G‑1]
API
Applications Program Interface
[910.3‑G‑3]
APID
Application Identifier
[910.3‑G‑3]
APID
Application Process Identifier
[120.0‑G‑3][130.0‑G‑2][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][232.0‑B‑2][313.0‑Y‑1][350.0‑G‑2][722.1‑M‑1][727.0‑B‑4][732.0‑B‑2][734.0‑G‑1][740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.4‑B‑2][912.3‑B‑2]
APL
Applied Physics Laboratory
[720.3‑G‑1]
APM
Attitude Parameter Message
[504.0‑B‑1][505.0‑B‑1]
apm
Attitude Parameter Message tag
[505.0‑B‑1]
APP
Application (layer)
[880.0‑G‑1]
APP
A Posteriori Probability
[130.1‑G‑2]
AR
Agency Representative
[320.0‑B‑6]
ARQ
Automatic Repeat Queuing
[210.0‑G‑1][211.0‑B‑4][700.0‑G‑3][740.0‑G‑1]
ARQ
Automatic Repeat Request
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2][734.0‑G‑1][880.0‑G‑1]
ASA
Austrian Space Agency
[Agency List]
ASCII
American Standard Code for Information Interchange
[502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][506.1‑B‑1][508.0‑B‑1][520.1‑M‑1][521.0‑B‑2][610.0‑G‑5][620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1][641.0‑B‑2][641.0‑G‑2][643.0‑B‑1][644.0‑B‑3][645.0‑G‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][650.0‑M‑2][651.0‑M‑1][661.0‑B‑1]
ASCP
AOS Synchronization and Coding Procedure
[912.11‑O‑1]
ASDC
Abstract Service Definition Conventions
[910.2‑G‑1][912.3‑B‑2]
ASE
Application-Service-Element
[910.2‑G‑1]
ASI
Asynchronous Serial Interface
[706.1‑G‑1]
ASI
Agenzia Spaziale Italiana
[Agency List]
ASIC
Application Specific Integrated Circuit
[131.3‑B‑1]
ASIC
Application Specific Integrated Chip
[880.0‑G‑1]
ASK
Amplitude-Shift Keying
[880.0‑G‑1]
ASM
Attached Synchronization Marker
[350.0‑G‑2][130.1‑G‑2][131.3‑B‑1][210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1]
ASM
Attached Sync Marker
[131.0‑B‑2]
ASM
Attached SYNC Marker
[131.2‑B‑1]
ASN.1
Abstract Syntax Notation One
[620.0‑B‑2][641.0‑B‑2][641.0‑G‑2][714.0‑B‑2][910.2‑G‑1][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][913.1‑B‑1][914.1‑G‑1]
ASN.1
Abstract Syntax Notation 1
[910.3‑G‑3]
ASO
Application-Service-Object
[910.2‑G‑1]
ASOI
Application Service Object Invocation
[910.2‑G‑1]
ATM
Asynchronous Transfer Mode
[706.2‑G‑1]
ATV
Automated Transfer Vehicle
[350.0‑G‑2][706.1‑G‑1][706.2‑G‑1]
ATV-CC
ATV Control Center
[706.1‑G‑1]
AV
All View (of DoDAF)
[311.0‑M‑1]
AVCHD
Advanced Video Coding High Definition
[706.1‑G‑1]
AVIRIS
Airborne Visible Infrared Imaging Spectrometer
[120.0‑G‑3]
AWGN
Additive White Gaussian Noise
[130.1‑G‑2][131.2‑B‑1][700.0‑G‑3][880.0‑G‑1]
AZ
Azimuth
[500.0‑G‑3]
AZEL
Azimuth-Elevation
[503.0‑B‑1]
AZEL
Azimuth and Elevation (antenna configuration)
[500.0‑G‑3]
b/s
bits per second
B2
Beagle 2
[740.0‑G‑1]
B_PDU
Bitstream Protocol Data Unit
[700.0‑G‑3]
BAB
Bundle Authentication Block
[734.0‑G‑1]
BB
BaseBand
[131.3‑B‑1]
BBFRAME
BaseBand Frame in the DVB-S2 standard
[131.3‑B‑1]
BBHEADER
Header of BBFRAME in the DVB-S2 standard
[131.3‑B‑1]
BC
Bypass of Acceptance Check (Bypass Flag = 1) and Control (Control Command Flag = 1)
[232.1‑B‑2]
BCC-HOSC
Backup Control Center HOSC
[706.1‑G‑1]
BCD
Binary Coded Decimal
[301.0‑B‑4][660.1‑G‑1]
BCH
Bose-Chaudhuri-Hocquenghem
[130.1‑G‑2][131.3‑B‑1][230.1‑G‑2][231.0‑B‑2]
BD
Bypass of Acceptance Check (Bypass Flag = 1) and Data (Control Command Flag = 0)
[232.1‑B‑2]
BER
Bit Error Rate
[130.1‑G‑2][210.0‑G‑1][211.0‑B‑4][401.0‑B‑22][413.0‑G‑2][415.0‑G‑1][700.0‑G‑3][706.1‑G‑1]
BER
Basic Encoding Rules (of ASN.1)
[914.1‑G‑1]
BER
Basic Encoding Rules
[913.1‑B‑1]
BER
Bit Error Ratio
[131.2‑B‑1]
BFSPO
Belgian Federal Science Policy Office
[Agency List]
BGP
Border Gateway Protocol
[135.0‑B‑4][702.1‑B‑1]
BI
Band-Interleaved
[123.0‑B‑1]
bi-phase-L
bi-phase-level modulation
[401.0‑B‑22]
BIH
Bureau International de l’Heure
[500.0‑G‑3]
BIL
Band-Interleaved-by-Line
[123.0‑B‑1]
BIP
Band-Interleaved-by-Pixel
[123.0‑B‑1]
BIPM
Bureau International des Poids et Mesures
[301.0‑B‑4]
BIT
Bit Error Rate
[211.1‑B‑3]
BLO
Phase Locked Loop Bandwidth
[401.0‑B‑22]
BLOB
Binary Large OBject
[520.1‑M‑1][521.0‑B‑2][523.1‑M‑1]
BNF
Backus-Naur-Form
[644.0‑B‑3]
BNSC
British National Space Centre
[210.0‑G‑1][401.0‑B‑22]
BOF
Birds-Of-a-Feather
[A02.1‑Y‑3]
BP
Bundle Protocol
[351.0‑M‑1][734.0‑G‑1]
BPE
Bit-Plane Encoder
[120.1‑G‑1][122.0‑B‑1]
BPSK
Binary Phase Shift Keying
[130.1‑G‑2][131.3‑B‑1][413.0‑G‑2][415.1‑B‑1]
BPSK
Binary Phase Shift Key
[910.11‑B‑1][910.14‑G‑1]
BPSK
binary phase-shift keying
[415.0‑G‑1]
BR
Buffer Register
[230.1‑G‑2]
BRI
Basic Rate Interface
[706.2‑G‑1]
BRM
Basic Reference Model
[910.2‑G‑1]
BS
Base Station
[880.0‑G‑1]
BSNR
bit SNR
[130.1‑G‑2]
BSP
Bundle Security Protocol
[734.0‑G‑1][880.0‑G‑1]
BSQ
Band-Sequential
[123.0‑B‑1]
BSS
Basic Service Set
[880.0‑G‑1]
BTG
Bit Transition Generator
[230.1‑G‑2][231.0‑B‑2]
BW
Bandwidth
[401.0‑B‑22][415.0‑G‑1]
BWA
Broadband Wireless Access
[880.0‑G‑1]
BWEM
BandWidth Efficient Modulation
[311.0‑M‑1]
BWEM
BandWidth Efficient Modulation
[311.0‑M‑1]
C
Conditional
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
C&A
Certification and Accreditation
[350.4‑G‑1]
C&DH
Command and Data Handling
[311.0‑M‑1][740.0‑G‑1]
C&S
Coding and Synchronization
[211.0‑B‑4][211.1‑B‑3][211.2‑B‑1]
C3I
Command, Control, Communications & Information
[735.0‑G‑1]
C3I
Command, Control, Communications, and Information
[A01.2‑Y‑4]
CA
Control Authority
[610.0‑G‑5][620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1][645.0‑G‑1]
CA
Certificate Authority
[350.8‑G‑1][352.0‑B‑1]
CA
Certification Authority
[350.6‑G‑1][350.8‑G‑1]
CA
Conjunction Assessment
[508.0‑B‑1]
CA_SDU
Channel Access Service Data Unit
[350.0‑G‑2]
CADMOS
Centre d'Aide au Développement des activités en Micro-pesanteur et des Opérations Spatiales
[706.1‑G‑1]
CADS
Control Authority Data Structures
[631.0‑G‑2][632.0‑B‑1]
CADU
Channel Access Data Unit
[120.0‑G‑3][131.0‑B‑2][131.3‑B‑1][700.0‑G‑3]
CAID
Control Authority Identifier
[620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
CAN
Controller Area Network
[880.0‑G‑1]
CAO
Control Authority Office
[621.0‑G‑1]
CAS
Chinese Academy of Sciences
[Agency List"]
CAST
Chinese Academy of Space Technology
[Agency List"]
Cat
Category
[401.0‑B‑22]
CBC
cipher block chaining OR cipher-block-chaining
[350.3‑G‑1]
CBC-MAC
Cipher Block Chaining Message Authentication Code
[352.0‑B‑1]
CBHE
Compressed Bundle Header Encoding
[734.0‑G‑1]
CC
Common Criteria
[350.4‑G‑1][350.8‑G‑1]
CCB
Change Control Board
[350.4‑G‑1]
CCD
Charge Coupled Device
[120.0‑G‑3]
CCD
Charge Coupled Device, an imaging sensor
[122.0‑B‑1]
CCIR
International Radio Consultative Committee
[401.0‑B‑22]
CCIR
International Coordinating Committee for Radio Frequencies
[503.0‑B‑1][504.0‑B‑1]
CCITT
International Telegraph and Telephone Consultative Committee
[610.0‑G‑5][A31.0‑G‑1]
CCM
Constant Coding and Modulation
[131.3‑B‑1][131.4‑M‑1]
CCM
Counter with Cipher Block Chaining MAC
[350.3‑G‑1]
CCM
Counter with CBC-MAC
[352.0‑B‑1]
CCS
CCSDS Calendar Segmented Time Code
[301.0‑B‑4]
CCSDS
Consultative Committee for Space Data Systems
[most CCSDS books (too many to list)]
CCSDS CA
CCSDS Control Authority
[651.1‑B‑1]
CD-ROM
Compact Disk - Read Only Memory
[641.0‑G‑2][650.0‑M‑2]
CDAS
Command and Data Acquisition Services
[850.0‑G‑1]
CDF
Common Data Format
[647.1‑B‑1]
CDHS
Command and Data Handling Software (application)
[875.0‑M‑1]
CDM
Code Division Multiplexing
[880.0‑G‑1]
CDM
Conjunction Data Message
[508.0‑B‑1]
CDMA
Code Division Multiple Access
[415.0‑G‑1][415.1‑B‑1][500.0‑G‑3][880.0‑G‑1]
CDO
Content Data Object
[650.0‑M‑2]
CDS
Coded Data Set
[120.0‑G‑3][121.0‑B‑2][123.0‑B‑1]
CDS
Command and Data Handling System
[211.0‑B‑4]
CDS
CCSDS Day Segmented (time code)
[301.0‑B‑4][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3]
CE
Customer Edge
[706.1‑G‑1]
CELP
Code Excited Linear Predictive
[706.2‑G‑1]
CEM
Common Evaluation Methodology
[350.4‑G‑1]
CEOS
Committee on Earth Observation Satellites
[311.0‑M‑1]
CEP
Central Electronics Processor
[740.0‑G‑1]
CESG
CCSDS Engineering Steering Group
[313.0‑Y‑1][502.1‑Y‑1][A02.1‑Y‑3]
CF
Control Function
[910.2‑G‑1]
CFDP
CCSDS File Delivery Protocol
[123.0‑B‑1][130.0‑G‑2][210.0‑G‑1][311.0‑M‑1][312.0‑G‑1][720.1‑G‑3][720.3‑G‑1][722.1‑M‑1][727.0‑B‑4][734.0‑G‑1][740.0‑G‑1][850.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][A01.2‑Y‑4.1]
CFDP
(deprecated) CCSDS File Distribution Protocol
[520.0‑G‑3]
CGR
Contact Graph Routing
[734.0‑G‑1]
Ch
Channel
[211.1‑B‑3]
CIF
Client Interface
[914.0‑M‑1]
CIO
Conventional International Origin
[500.0‑G‑3]
CIP
Compression Identification Packet
[121.0‑B‑2]
CL
Convergence Layer
[734.0‑G‑1]
CLCW
(Deprecated.) Command Link Control Word
[200.0‑G‑6][700.0‑G‑3]
CLCW
Communications Link Control Word
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][230.1‑G‑2][232.0‑B‑2][232.1‑B‑2][732.0‑B‑2][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][916.3‑M‑1]
CLTC/BITTT
China Satellite Launch and Tracking Control General, Beijing Institute of Tracking and Telecommunications Technology
[Agency List]
CLTU
(Deprecated.) Command Link Transmission Unit
[200.0‑G‑6][350.0‑G‑2][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][916.1‑M‑1]
CLTU
Communications Link Transmission Unit
[230.1‑G‑2][231.0‑B‑2][521.1‑B‑1][740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][910.4‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
CLTU-
Forward CLTU service (operation prefix)
[912.1‑B‑3]
CLTU-
Enhanced Forward CLTU service (operation prefix)
[912.11‑O‑1]
CM
Complex Management
[910.11‑B‑1][910.14‑G‑1][910.3‑G‑3]
CM
content manager
[312.0‑G‑1]
CM
SLE Complex Management
[910.4‑B‑2]
CM-P
Complex Management Port
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
CMAC
Cipher-based MAC
[350.3‑G‑1]
CMAC
Cipher Based Message Authentication Code
[352.0‑B‑1]
CMC
CCSDS Management Council
[311.0‑M‑1][313.0‑Y‑1][502.1‑Y‑1][A01.2‑Y‑4.1][A02.1‑Y‑3]
CMD
command
[200.0‑G‑6]
Cmd
Telecommand
[401.0‑B‑22]
CMM
Carrier Modulation Mode
[200.0‑G‑6][230.1‑G‑2][231.0‑B‑2][910.11‑B‑1][910.14‑G‑1][912.11‑O‑1][912.1‑B‑3]
CMMI
Capability Maturity Model Integration
[350.1‑G‑1]
CNES
Centre National d’Etudes Spatiales
[Agency List][502.1‑Y‑1][401.0‑B‑2]
CNSA
China National Space Administration
[Agency List]
COBIT
Control Objectives for Information and related Technology
[350.7‑G‑1]
CODEC
Code-Decode
[706.2‑G‑1]
COHER or Coh
Coherent
[401.0‑B‑22]
Col-CC
Columbus Control Centre
[706.1‑G‑1]
COM
Common Object Model
[520.0‑G‑3]
COM
Component Object Model
[914.0‑M‑1][914.1‑G‑1][914.2‑G‑2]
COP
(Deprecated.) Command Operation Procedure
[200.0‑G‑6][700.0‑G‑3]
COP
Communications Operation Procedure
[132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][232.1‑B‑2][732.0‑B‑2][910.4‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
COP-1
Communications Operation Procedure 1
[910.0‑G‑2][910.0‑Y‑2]
COP-1
Communications Operations Procedure 1
[910.3‑G‑3]
COP-P
Communication Operations Procedure Proximity
[211.0‑B‑4]
COP-P
Communication Operations Procedure for Proximity links
[210.0‑G‑1]
CORBA
Common Object Request Broker Architecture
[661.0‑B‑1][914.1‑G‑1]
CORBA
Common Request Broker Architecture
[520.0‑G‑3]
COTS
Commercial-Off-The-Shelf
[350.1‑G‑1][880.0‑G‑1]
COTS
Commercial Off The Shelf
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
COTS
Commercial Off-The-Shelf
[706.1‑G‑1]
COVRS
Columbus On-board Video Reconstruction Service
[706.1‑G‑1]
CPA
Close after Peer Abort (Timer)
[913.1‑B‑1]
CPM
Continuous Phase Modulation
[413.0‑G‑2]
CPN
CCSDS Principal Network
[700.0‑G‑3]
CPU
Central Processing Unit
[914.2‑G‑2]
CR
Compression Ratio
[120.0‑G‑3]
CR
Codeblock Rejection
[230.1‑G‑2]
CRC
Communications Research Centre
[401.0‑B‑22]
CRC
Cyclic Redundancy Check
[131.3‑B‑1][131.4‑M‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][230.1‑G‑2][350.0‑G‑2][651.1‑B‑1][660.1‑G‑1][740.0‑G‑1]
CRC
Cyclic Redundant Code
[911.1‑B‑3][911.2‑B‑2]
CRC
Cyclic Redundancy Code
[130.1‑G‑2][700.0‑G‑3]
CRC
Cyclical Redundancy Check
[650.0‑M‑2][661.0‑B‑1]
CRL
Communications Research Laboratory
[401.0‑B‑22]
CRL
Certificate Revocation List
[350.6‑G‑1]
CRT
Cathode Ray Tube
[706.1‑G‑1]
CS
Configuration Server
[735.0‑G‑1]
CSA
Canadian Space Agency
[Agency List][401.0‑B‑22]
CSIRO
Commonwealth Scientific and Industrial Research Organization
[Agency List]
CSMA-CA
Carrier-sense, Multiple Access-Collision Avoidance
[880.0‑G‑1]
CSMA-CD
Carrier-sense, Multiple Access-Collision Detection
[880.0‑G‑1]
CSR
Communication Service Request
[706.1‑G‑1]
CSS
Cross Support Services
[506.0‑M‑1][A02.1‑Y‑3]
CSSA
Cross Support Services Area
[910.0‑G‑2][910.0‑Y‑2]
CSSI
Center for Space Standards and Innovation
[502.1‑Y‑1]
CSTS
Cross Support Transfer Services
[734.0‑G‑1][910.11‑B‑1][910.14‑G‑1]
CTB
Cargo Transfer Bag
[881.0‑M‑1]
CTI
Compression Technique Identification
[121.0‑B‑2]
CTL
Chip Tracking Loop
[414.0‑G‑1]
CUC
CCSDS Unsegmented Time Code
[872.0‑M‑1]
CUC
CCSDS Unsegmented [Time Code]
[301.0‑B‑4]
CVCDU
Coded Virtual Channel Data Unit
[120.0‑G‑3][350.0‑G‑2][700.0‑G‑3]
CW
Continuous Wave
[211.0‑B‑4]
CWE
Common Working Environment
[502.1‑Y‑1]
CWE
Collaborative Work Environment
[A02.1‑Y‑3]
D-ID
Domain Identifier
[135.0‑B‑4]
DACP
Device Abstraction Control Procedure
[871.2‑M‑1]
DAP
Device-specific Access Protocol
[871.0‑M‑1]
DARPA
Defense Advanced Research Projects Agency
[706.1‑G‑1]
DAS
Device Access Service
[850.0‑G‑1][871.0‑M‑1][871.1‑M‑1][871.2‑M‑1]
dB
decibel(s)
[401.0‑B‑22]
DB
Database
[660.0‑G‑1]
dB
Decibel
[413.0‑G‑2]
dB/K
decibel(s) per degree Kelvin
[401.0‑B‑22]
dBi
decibel(s) relative to an isotropically radiated signal
[401.0‑B‑22]
dBm
decibel(s) relative to one milliwatt
[401.0‑B‑22]
DBMS
Data Base Management System
[311.0‑M‑1][610.0‑G‑5][650.0‑M‑2]
DBMS
database management system
[312.0‑G‑1]
dBW
decibels referenced to one Watt
[910.11‑B‑1][910.14‑G‑1]
dBW
Decibel(s) relative to one Watt
[401.0‑B‑22]
DC
downconversion
[500.1‑G‑1]
DCA
Data Collection Agency
[506.0‑M‑1]
DCCP
Datagram Congestion Control Protocol
[880.0‑G‑1][A01.2‑Y‑4.1]
DCI
Digital Cinema Initiative
[706.1‑G‑1]
DCOM
Distributed COM
[914.1‑G‑1]
DCT
Design Control Table [Link]
[401.0‑B‑22]
DCTA
Departamento de Ciência e Tecnologia Aeroespacial
[Agency List]
DD
Data Dictionary
[610.0‑G‑5]
DDID
Data Description Identifier
[620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
DDL
Data Descriptive Language
[610.0‑G‑5]
DDL
Data Definition Language
[647.1‑B‑1]
DDL
Data Description Language
[621.0‑G‑1][645.0‑G‑1][646.0‑G‑1]
DDOR
Delta Differential One-way Ranging
[A01.2‑Y‑4.1]
DDOS
Distributed Denial-Of-Service
[350.1‑G‑1]
DDP
Data Description Package
[630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
DDPS
Device Data Pooling Service
[850.0‑G‑1][871.1‑M‑1]
DDR
Data Descriptive Record
[610.0‑G‑5]
DDR
Data Description Record
[312.0‑G‑1][620.0‑B‑2][621.0‑G‑1][644.0‑B‑3][645.0‑G‑1][646.0‑G‑1]
DDSAP
device discovery service access point
[854.0‑M‑1]
DDU
Description Data Unit
[620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][631.0‑G‑2][632.0‑B‑1][645.0‑G‑1]
DE
Development Ephemerides
[500.0‑G‑3]
DEC
Declination
[500.0‑G‑3]
DEC
Digital Equipment Corporation
[610.0‑G‑5]
DED
Data Entity Dictionary
[620.0‑B‑2][621.0‑G‑1][641.0‑G‑2][645.0‑G‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][651.0‑M‑1][651.1‑B‑1]
DEDSL
Data Entity Dictionary Specification Language
[312.0‑G‑1][311.0‑M‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][651.0‑M‑1][A01.2‑Y‑4.1]
DEDSL
Data Entity Specification Language
[652.0‑M‑1]
deg
Degree
[401.0‑B‑22]
DEL
Data Encoding Layer
[913.1‑B‑1][914.1‑G‑1]
Delta-DOR
Delta Differential One-Way Ranging
[500.1‑G‑1][503.0‑B‑1][506.1‑B‑1]
Delta-DOR
delta Differential One-way Range
[506.0‑M‑1]
DER
Distinguished Encoding Rules
[913.1‑B‑1]
DES
Device Enumeration Service
[850.0‑G‑1]
DES
Data Encryption Standard
[350.0‑G‑2][350.2‑G‑1]
DFC ID
Data Field Construction Identifier
[210.0‑G‑1][211.0‑B‑4][740.0‑G‑1]
DFC_ID
Data Field Construction Identifier
[133.1‑B‑2][702.1‑B‑1]
DFE
Direct-From-Earth
[734.0‑G‑1][740.0‑G‑1]
DFL
Data Field Length in the DVB-S2 standard
[131.3‑B‑1]
DFS
Dynamic Frequency Selection
[880.0‑G‑1]
DG
Data Group
[415.1‑B‑1]
DGS
Destination Gateway Set
[735.0‑G‑1]
DH
Diffie-Hellman
[350.6‑G‑1]
DI
dense-interrogator
[881.0‑M‑1]
DIF
Directory Interchange Format
[651.0‑M‑1]
DIL
Data Interchange Language
[645.0‑G‑1]
DIP
Dissemination Information Package
[312.0‑G‑1][650.0‑M‑2][652.0‑M‑1][661.0‑B‑1]
DIR
Certificate Repository
[350.6‑G‑1]
DLP
Digital Light Processing
[706.1‑G‑1]
DLR
Deutsches Zentrum für Luft- und Raumfahrt
[Agency List][401.0‑B‑22][706.1‑G‑1]
DMS
Destination Module Set
[735.0‑G‑1]
DMZ
demilitarized zone
[350.4‑G‑1]
DNRZ
Differential Non-Return to Zero
[401.0‑B‑22]
DNS
Domain Name Service
[734.0‑G‑1]
DNS
Domain Name System
[734.0‑G‑1]
DNSC
Danish National Space Center
[Agency List]
DO
data object
[312.0‑G‑1]
DOCSIS
Data Over Cable Service Interface Specifications
[880.0‑G‑1]
DoD
(U.S.) Department of Defense
[311.0‑M‑1]
DoDAF
DoD Architecture Framework
[311.0‑M‑1]
DOM
day of month
[301.0‑B‑4]
DOM
Document Object Model
[660.0‑B‑1]
DOR
Differential One-Way Ranging
[500.1‑G‑1][503.0‑B‑1][506.1‑B‑1]
DOR
Differential One-way Range
[506.0‑M‑1]
DORIS
Doppler Orbitography and Radiopositioning Integrated by Satellite
[503.0‑B‑1]
DOY
Day Of the Year
[506.1‑B‑1]
doy
day of year
[301.0‑B‑4]
DPA
Data Processing Agency
[506.0‑M‑1]
DPC
data processing center
[700.0‑G‑3]
DRG
Atmospheric Drag
[508.0‑B‑1]
DRM
Digital Rights Management
[650.0‑M‑2]
DRP
Distributed Reservation Protocol
[880.0‑G‑1]
DRTS
Data Relay Test Satellite
[706.1‑G‑1]
DRVID
Differenced Range vs. Integrated Doppler
[401.0‑B‑22]
DSA
Digital Signature Algorithm
[350.3‑G‑1][352.0‑B‑1]
DSN
Deep Space Network
[130.1‑G‑2][350.4‑G‑1][415.0‑G‑1][500.0‑G‑3][500.1‑G‑1][502.1‑Y‑1][506.0‑M‑1][A01.2‑Y‑4.1]
DSO
data store object
[312.0‑G‑1]
DSP
Digital Signal Processing
[706.2‑G‑1]
DSS
Digital Speech Standard
[706.2‑G‑1]
DSS
Digital Signature Standard
[350.3‑G‑1][352.0‑B‑1]
DSSS
Direct Sequence Spread Spectrum
[415.0‑G‑1][415.0‑G‑1][415.1‑B‑1][880.0‑G‑1]
DSST
Draper Semi-Analytic Satellite Theory
[502.0‑B‑2]
DTD
Document Type Declaration
[647.3‑B‑1]
DTD
Document Type Definition
[505.0‑B‑1][651.0‑M‑1][651.1‑B‑1][660.0‑G‑1]
DTE
Direct-To-Earth
[734.0‑G‑1][740.0‑G‑1]
DTN
Delay/Disruption Tolerant Networking
[521.1‑B‑1][734.0‑G‑1][735.0‑G‑1][735.1‑B‑1]
DTN
Delay Tolerant Networking
[880.0‑G‑1]
DTN
Delay Tolerant Network
[720.3‑G‑1]
DTN
Disruption Tolerant Networking
[A01.2‑Y‑4.1]
DTNRG
Delay Tolerant Networking Research Group
[734.0‑G‑1]
DTTL
Data Transition Tracking Loop
[414.0‑G‑1]
DTV
Digital TV
[706.1‑G‑1]
DU
Data Unit
[910.4‑B‑2]
DUA
Data Usage Agency
[506.0‑M‑1]
DV
Dissimilar Voice
[706.2‑G‑1]
DVB
Digital Video Broadcasting
[706.1‑G‑1]
DVB
Digital Video Broadcasting project
[131.3‑B‑1]
DVB-S2
DVB System of second generation for satellite broadcasting
[131.3‑B‑1]
DVIS
Digital Voice Intercommunications Subsystem
[706.2‑G‑1]
DVS
Device Virtualisation Service
[850.0‑G‑1][871.1‑M‑1][871.2‑M‑1]
DWT
Discrete Wavelet Transform
[120.1‑G‑1][122.0‑B‑1]
DWT
diagram of the transform
[120.1‑G‑1]
E-R
entity-relationship
[312.0‑G‑1]
E/S
Earth-to-Space
[401.0‑B‑22]
EAC
European Astronaut Centre
[706.1‑G‑1]
EAD
Encoded Archival Description
[651.0‑M‑1]
EAS
Electronic Article Surveillance
[880.0‑G‑1]
EAST
Enhanced Ada SubseT
[312.0‑G‑1][644.0‑B‑3][645.0‑G‑1][647.1‑B‑1][651.0‑M‑1]
Eb
Energy per data bit
[401.0‑B‑22]
Eb/No
Energy per data bit to Noise ratio in a 1 Hz bandwidth
[401.0‑B‑22]
Eb/No
Energy per bit to Noise spectral density ratio
[413.0‑G‑2]
Eb/No
bit Energy and Noise power spectral density No ratio
[131.3‑B‑1]
EBNF
Extended Backus-Naur Form
[913.1‑B‑1]
ebXML
electronic business using eXtensible Markup Language
[312.0‑G‑1]
ECC
Elliptic Curve Cryptography
[350.3‑G‑1]
ECCS
European Cooperation for Space Standardization
[880.0‑G‑1]
ECDSA
Elliptic Curve Digital Signature Algorithm
[350.3‑G‑1][352.0‑B‑1]
ECDSA
Elliptic Curve DSA
[350.3‑G‑1]
ECG
Electrocardiogram
[880.0‑G‑1]
ECI
Earth Centered Inertial
[502.0‑B‑2]
ECMA
European Computer Manufacturers Association
[880.0‑G‑1]
ECS
EOSDIS Core System
[312.0‑G‑1]
ECSS
European Coordination for Space Standardization
[A02.1‑Y‑3]
EDAC
Error Detection and Correction
[350.0‑G‑2]
EDG
European Data Grid
[312.0‑G‑1]
EDS
Emergency Detection System
[351.0‑M‑1]
EDU
Exchange Data Unit
[620.0‑B‑2][622.0‑B‑1][631.0‑G‑2][632.0‑B‑1][645.0‑G‑1]
EEG
Electroencephalogram
[880.0‑G‑1]
EES
Earth Exploration Service
[401.0‑B‑22]
EESS
Earth Exploration Satellite Service
[413.0‑G‑2]
EESS
Earth Exploration Satellites Systems
[131.3‑B‑1]
EGM
Earth Gravitational Model, Earth Geopotential Model
[502.0‑B‑2]
EGSE
Electrical Ground Support Equipment
[850.0‑G‑1]
EGSE
Electrical Ground System Equipment
[660.0‑G‑1]
EID
Endpoint Identifier
[734.0‑G‑1]
EIRP
Equivalent (or Effective) Isotropic Radiated Power
[910.11‑B‑1][910.14‑G‑1]
EIRP
Effective Isotropic Radiated Power
[131.4‑M‑1][415.0‑G‑1]
EIRP
Equivalent Isotropically Radiated Power
[401.0‑B‑22][880.0‑G‑1]
EJB
Enterprise Java Beans
[914.1‑G‑1]
EL
Elevation
[500.0‑G‑3]
ELEV
Elevation
[401.0‑B‑22]
EM
Electromagnetic
[880.0‑G‑1]
EMC
Electromagnetic Compatibility
[880.0‑G‑1]
EME2000
Earth Mean Equator and Equinox of J2000 (Julian Date 2000)
[502.0‑B‑2][504.0‑B‑1]
EME2000
Earth Mean Equator and Equinox of J2000 (Epoch J2000)
[508.0‑B‑1]
EMI
Electromagnetic Interference
[880.0‑G‑1]
ENCAP
Encapsulation (Packet Service)
[702.1‑B‑1]
EOD
Even/Odd Detector
[230.1‑G‑2]
EOF
End of File
[621.0‑G‑1][720.1‑G‑3][727.0‑B‑4]
EOF
End-of-file
[620.0‑B‑2]
EOL
End of Line
[641.0‑G‑2]
EOP
Earth Orientation Parameters
[502.0‑B‑2]
EOS
Earth Observing System
[312.0‑G‑1]
EOSDIS
EOS Data and Information System
[312.0‑G‑1]
EP
Encapsulation Packet Protocol
[734.0‑G‑1]
EPC
Electronic Product Code
[880.0‑G‑1][881.0‑M‑1]
EPI
Encapsulated Protocol Identifier
[133.1‑B‑2][722.1‑M‑1]
ERT
Earth Receive Time
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
ES-ID
End System Identifier
[135.0‑B‑4‑S]
Es/No
Energy per symbol to Noise spectral density ratio
[131.3‑B‑1][413.0‑G‑2]
Es/No
channel symbol Energy and Noise power spectral density No ratio
[131.3‑B‑1]
ESA
European Space Agency
[Agency List][130.1‑G‑2][210.0‑G‑1][230.1‑G‑2][312.0‑G‑1][401.0‑B‑22][415.0‑G‑1][415.1‑B‑1][500.0‑G‑3][502.1‑Y‑1][506.0‑M‑1][610.0‑G‑5][706.1‑G‑1][910.0‑G‑2][910.0‑Y‑2][A01.2‑Y‑4.1]
ESB
enterprise service bus
[312.0‑G‑1]
ESB
Extension Security Block
[734.0‑G‑1]
ESOC
European Space Operations Center
[502.1‑Y‑1][500.1‑G‑1]
ESU
external storage unit
[500.1‑G‑1]
ETSI
European Telecommunications Standards Institute
[131.3‑B‑1][211.0‑B‑4][706.2‑G‑1][880.0‑G‑1][881.0‑M‑1]
EUMETSAT
European Organization for the Exploitation of Meteorological Satellites
[Agency List]
EUTELSAT
European Telecommunications Satellite Organization
[Agency List]
EVA
Extra-Vehicular Activity
[706.1‑G‑1][880.0‑G‑1]
exp
exponent
[401.0‑B‑22]
EXPCON
Experiment Control (application)
[875.0‑M‑1]
F
Forward
[211.1‑B‑3]
f or Freq
Frequency
[401.0‑B‑22]
F-AOSSP
Forward AOS Space Packet
[910.3‑G‑3]
F-AOSVCA
Forward AOS Virtual Channel Access
[910.3‑G‑3]
F-cVCDU
Forward Coded Virtual Channel Data Unit
[910.3‑G‑3]
F-pVCDU
Forward Proto Virtual Channel Data Unit
[910.3‑G‑3]
F-VCDU
Forward Virtual Channel Data Unit
[910.3‑G‑3]
FAF
Forward All Frames
[910.4‑B‑2]
FARM
Frame Acceptance and Reporting Mechanism
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][200.0‑G‑6][232.0‑B‑2][232.1‑B‑2][700.0‑G‑3][732.0‑B‑2][740.0‑G‑1]
FARM-1
Frame Acceptance and Reporting Mechanism version 1
[912.3‑B‑2]
FARM-P
Frame Acceptance and Rejection Mechanism Proximity
[210.0‑G‑1]
FARM-P
Frame Acceptance and Reporting Mechanism for Proximity
[211.1‑B‑3][211.2‑B‑1]
FARM-P
Frame Acceptance and Reporting Mechanism Proximity
[211.0‑B‑4]
FAS
File Access Service
[850.0‑G‑1][873.0‑M‑1]
fc
RF carrier frequency
[401.0‑B‑22]
FCC
Federal Communications Commission
[880.0‑G‑1][881.0‑M‑1]
F chip
chip rate
FCLTU
Forward Communications Link Transmission Unit
[910.11‑B‑1][910.14‑G‑1]
FCT
Flight Control Team
[706.2‑G‑1]
fd
Doppler frequency shift
[401.0‑B‑22]
FD
Frame Descriptor
[131.2‑B‑1]
FD(n)
File Data Segment
[720.1‑G‑3]
FDD
Frequency Division Duplex
[880.0‑G‑1]
FDDI
Fiber Distributed Data Interface
[706.1‑G‑1]
FDIR
Fault Detection Isolation and Recovery
[735.0‑G‑1]
FDIR
Fault Detection, Isolation, and Recovery
[875.0‑M‑1]
FDM
Frequency Division Multiplexing
[880.0‑G‑1]
FDMA
Frequency Division Multiple Access
[500.0‑G‑3][880.0‑G‑1]
FDMA
frequency-division multiple access
[415.0‑G‑1]
FDS
Flight Dynamics System
[660.0‑G‑1]
FDU
Frame Data Unit
[132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][232.1‑B‑2][732.0‑B‑2]
FDU
File Delivery Unit
[720.1‑G‑3][727.0‑B‑4]
FEC
Forward Error Correction
[130.1‑G‑2][131.3‑B‑1][311.0‑M‑1][350.0‑G‑2]
FECF
Frame Error Control Field
[131.0‑B‑2][132.0‑B‑1][231.0‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
FECFRAME
Forward Error Correction in the DVB-S2 standard
[131.3‑B‑1]
FEP
Front End Processor
[706.1‑G‑1]
FER
Frame Error Rate
[130.1‑G‑2][131.3‑B‑1][131.4‑M‑1]
FER
Frame Error Ratio
[131.2‑B‑1]
FG
Functional Group
[350.0‑G‑2][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
FGDC
Federal Geographic Data Committee
[651.0‑M‑1]
FHSS
Frequency Hopping Spread Spectrum
[880.0‑G‑1][881.0‑M‑1]
FIFO
First In First Out
[211.0‑B‑4][735.0‑G‑1][735.1‑B‑1]
FIFO
First In – First Out
[912.3‑B‑2]
FIFO
First In, First Out
[873.0‑M‑1]
FIFO
First-In-First-Out
[120.1‑G‑1]
FIN
Finished (receiver to sender)
[720.1‑G‑3]
FIPS
Federal Information Processing Standard
[352.0‑B‑1][914.1‑G‑1]
FIPS
Federal Information Processing Standard(s)
[350.3‑G‑1]
FITS
Flexible Image Transport System
[641.0‑G‑2][647.1‑B‑1][650.0‑M‑2][652.0‑M‑1]
FM
Frequency Modulation
[401.0‑B‑22][880.0‑G‑1]
FM
Frame Marker
[131.2‑B‑1]
FMS
File Management Service
[850.0‑G‑1][873.0‑M‑1]
FN or Fn
Footnote
[401.0‑B‑22]
FOP
Frame Operation Procedure
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][200.0‑G‑6][232.0‑B‑2][232.1‑B‑2][732.0‑B‑2][912.3‑B‑2][914.2‑G‑2][916.3‑M‑1]
FOP
Frame Operations Procedure
[700.0‑G‑3]
FOP-P
Frame Operations Procedure-Proximity
[210.0‑G‑1]
FOP-P
Frame Operations Procedure – Proximity
[211.0‑B‑4]
FOP-P
Frame Operations Procedures for Proximity
[211.1‑B‑3][211.2‑B‑1]
FOV
Field of View
[880.0‑G‑1]
FPGA
Field Programmable Gate Array
[311.0‑M‑1][850.0‑G‑1]
FPGA
Field-Programmable Gate Array
[415.0‑G‑1][706.1‑G‑1][740.0‑G‑1]
FPS
Frame Per Second
[706.1‑G‑1]
FPSS
File and Packet Store Services
[873.0‑M‑1]
FS
Fundamental Sequence
[120.0‑G‑3][121.0‑B‑2]
FS
File Services
[850.0‑G‑1]
FSA
Federal Space Agency
[Agency List]
fsc
Subcarrier frequency
[401.0‑B‑22]
FSH
Frame Secondary Header
[130.0‑G‑2][132.0‑B‑1][910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3][910.4‑B‑2]
FSK
Frequency-Shift Keying
[880.0‑G‑1]
FSK
Frequency Shift Keying
[401.0‑B‑22][413.0‑G‑2]
FSO
Free Space Optics
[880.0‑G‑1]
FSP
Forward Space Packet
[910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][912.3‑B‑2][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][916.3‑M‑1]
FSP
Forward Space Packets
[910.0‑G‑2][910.0‑Y‑2]
FTCF
Forward Telecommand Frame
[910.3‑G‑3][912.3‑B‑2]
FTCF
Forward Telecommand Frames
[910.0‑G‑2][910.0‑Y‑2]
FTCVCA
Forward Telecommand Virtual Channel Access
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
FTP
File Transfer Protocol
[130.0‑G‑2][350.1‑G‑1][350.4‑G‑1][610.0‑G‑5][650.0‑M‑2][651.1‑B‑1]
FTS
File Transfer Service
[850.0‑G‑1]
Fwd
Forward
[740.0‑G‑1][910.4‑B‑2]
FWD
Forward
[912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
Fwd
forward link (from network element to satellite)
[415.0‑G‑1]
G/T
Antenna gain to system noise temperature ratio
[506.0‑M‑1]
G/T
Antenna gain divided by the receiving system’s noise temperature in degrees Kelvin (usually expressed in dB)
[401.0‑B‑22]
Galileo
Galileo Space Segment
[500.0‑G‑3]
GB
Gigabyte
[651.1‑B‑1]
GCM
Galois/Counter Mode
[352.0‑B‑1]
GCRF
Geocentric Celestial Reference Frame
[502.0‑B‑2][508.0‑B‑1]
GDS
Ground Data System
[740.0‑G‑1]
GDS
Ground Domain Services
[910.0‑G‑2][910.0‑Y‑2]
gen 2
The second generation global protocol operating in the UHF range. The current choice for many retail supply chain carton and pallet compliance applications, starting in 2006.
[880.0‑G‑1]
GEO
Geostationary Earth Orbit
[131.4‑M‑1]
GEO
Geosynchronous Earth Orbit
[350.1‑G‑1][351.0‑M‑1][415.0‑G‑1]
GEO
Geostationary Orbit
[415.1‑B‑1]
GF
Galois Field
[130.1‑G‑2][131.0‑B‑2]
GHRS
Goddard High Resolution Spectrometer
[120.0‑G‑3]
GHz
Gigahertz
[401.0‑B‑22][413.0‑G‑2]
GIS
Geographic Information System
[652.0‑M‑1]
GISTDA
Geo-Informatics and Space Technology Development Agency
[Agency List]
GLONASS
Global Navigation Satellite System
[500.0‑G‑3]
GM
Greenwich Mean
[500.0‑G‑3]
GMAC
Galois Message Authentication Code
[352.0‑B‑1]
GMAP
ID Global Multiplexer Access Point Identifier
[732.0‑B‑2]
GMAP ID
Global Multiplexer Access Point Identifier
[132.0‑B‑1][133.0‑B‑1][232.0‑B‑2]
GMSK
Gaussian Minimum Shift Keying
[413.0‑G‑2]
GMSK
Gaussian Minimum Shift Key
[910.11‑B‑1][910.14‑G‑1]
GMST
Greenwich Mean Sidereal Time
[500.0‑G‑3]
GMT
Greenwich Mean Time
[301.0‑B‑4]
GN
Ground Network
[415.0‑G‑1]
GND
Ground
[401.0‑B‑22]
GNS
Global Navigation System
[500.0‑G‑3]
GNSS
Global Navigation Satellite System
[503.0‑B‑1]
GOP
Group of Pictures
[706.1‑G‑1]
GPS
Global Positioning System
[350.1‑G‑1][351.0‑M‑1][401.0‑B‑22][500.0‑G‑3][500.1‑G‑1][502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][506.1‑B‑1][520.0‑G‑3]
GRC
Greenwich Rotating Coordinate Frame
[502.0‑B‑2]
GRND
Ground
[875.0‑M‑1]
GRS
Gamma-Ray Spectrometer
[120.0‑G‑3]
GS
Generic Stream
[131.3‑B‑1]
GS
Ground Station
[521.1‑B‑1]
GSCID
Global Spacecraft Identifier
[320.0‑B‑6]
GSFC
Goddard Space Flight Center
[120.1‑G‑1][130.1‑G‑2][502.1‑Y‑1][610.0‑G‑5]
GSOC
German Space Operations Centre
[706.1‑G‑1]
GTAG
Global Tag
GTIN
Global Trade Item Number
GUID
Globally Unique Identifier
[914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1]
GVCID
Global Virtual Channel Identifier
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][232.0‑B‑2][232.1‑B‑2][702.1‑B‑1][732.0‑B‑2][915.2‑M‑1][915.5‑M‑1]
GVCID
Global VCID
[910.4‑B‑2]
h
Hours
[401.0‑B‑22]
H/W
Hardware
[311.0‑M‑1]
HA
Hour angle
[500.0‑G‑3]
HBR
Heartbeat Receive (Timer)
[913.1‑B‑1]
HBT
Heartbeat Transmit (Timer)
[913.1‑B‑1]
HCI
Human Computer Interface
[520.0‑G‑3]
HD
High Definition
[706.1‑G‑1]
HDF
Hierarchical Data Format
[647.1‑B‑1]
HDLC
High-Level Data Link Control
[130.2‑G‑2]
HDMI
High Definition Multimedia Interface
[706.1‑G‑1]
HDR
header
[200.0‑G‑6]
HDSDI
High Definition Serial Digital Interface
[706.1‑G‑1]
HDTV
High Definition Television
[706.1‑G‑1]
HDV
HDTV Video
[706.1‑G‑1]
HEO
High Eccentric Orbit
[131.4‑M‑1]
HEO
High Earth Orbit
[500.0‑G‑3]
Hex
Hexadecimal
[320.0‑B‑6]
HFMS
Hierarchical File Management System
[650.0‑M‑2]
HIS
Hyper Spectral Imager
[120.0‑G‑3]
HMAC
Hash-based Message Authentication Code
[350.3‑G‑1][350.8‑G‑1][351.0‑M‑1][352.0‑B‑1]
HNSC
Hellenic National Space Committee
[Agency List]
HOSC
Huntsville Operations Control Center
[706.1‑G‑1]
HRDL
High Rate Data Links
[706.1‑G‑1]
HRFM
High Rate Frame Multiplexer\
[706.1‑G‑1]
HSI
Hyper Spectral Imager
HST
Hubble Space Telescope
[120.0‑G‑3]
HTML
HyperText Markup Language
[505.0‑B‑1]
HTTP
HyperText Transfer Protocol
[910.11‑B‑1][910.14‑G‑1]
Hz
Hertz
[401.0‑B‑22][506.0‑M‑1]
I&D
Integrate-and-Dump
[413.0‑G‑2]
I/O
Input/Output
[211.1‑B‑3][211.2‑B‑1]
I/Q
I divided by Q
[415.1‑B‑1]
IA
Implementing Arrangement
[506.0‑M‑1]
IA
Information Assurance
[350.8‑G‑1]
IA
Information Assurance
[350.8‑G‑1]
IAB
Internet Architecture Board
[714.0‑B‑2]
IANA
Internet Assigned Numbers Authority
[313.0‑Y‑1]
IAS
Internal Audio System
[706.1‑G‑1]
IAU
International Astronomical Union
[500.0‑G‑3][502.0‑B‑2][504.0‑B‑1]
IBM
International Business Machines
[610.0‑G‑5]
IC
Integrated Circuit
[881.0‑M‑1]
ICA
International Council on Archives
[651.0‑M‑1]
ICD
Interface Control Document
[500.0‑G‑3][502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][508.0‑B‑1][740.0‑G‑1]
ICD
International Code Designator
[A31.0‑G‑1]
ICMP
Internet Control Message Protocol
[714.0‑B‑2][913.1‑B‑1]
ICRF
International Celestial Reference Frame
[500.0‑G‑3][502.0‑B‑2][503.0‑B‑1][504.0‑B‑1]
ICRS
International Celestial Reference System
[500.0‑G‑3]
ICS
Instrument Configuration Subfield
[121.0‑B‑2]
ICS
Inter-orbit Communication System
[706.1‑G‑1]
ICV
Integrity Check Value
[350.0‑G‑2]
ID
Identifier
[130.0‑G‑2][130.2‑G‑2][200.0‑G‑6][506.0‑M‑1][610.0‑G‑5][620.0‑B‑2][621.0‑G‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][651.1‑B‑1][722.1‑M‑1][871.0‑M‑1][871.2‑M‑1][910.4‑B‑2][914.0‑M‑1][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1][A31.0‑G‑1]
IDEA
International Data Encryption Algorithm
[350.2‑G‑1]
IDS
Intrusion Detection System
[350.4‑G‑1][350.8‑G‑1]
IDSN
Integrated Services Digital Network
[350.4‑G‑1]
IDT
Interdigital Transducer
[880.0‑G‑1]
IEC
International Electrotechnical Commission
[502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][652.1‑M‑1][880.0‑G‑1][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1][A31.0‑G‑1]
IEC
International Electrotechnical Committee
[311.0‑M‑1]
IEEE
Institute of Electrical and Electronics Engineers
[313.0‑Y‑1][503.0‑B‑1][521.0‑B‑2][880.0‑G‑1][881.0‑M‑1]
IERS
International Earth Rotation and Reference Systems Service
[500.0‑G‑3][502.0‑B‑2]
IERS
International Earth Rotation and Reference Systems
[301.0‑B‑4]
IETF
Internet Engineering Task Force
[313.0‑Y‑1][350.2‑G‑1][651.1‑B‑1][A01.2‑Y‑4.1][A02.1‑Y‑3]
IF
Interface
[506.0‑M‑1]
IF
intermediate frequency
[500.1‑G‑1]
IFMS
intermediate frequency modem system
[500.1‑G‑1]
IFRB
International Frequency Registration Board
[401.0‑B‑22]
IGS
Interconnecting Ground Segment
[706.1‑G‑1]
IID
Interface Identifier
[914.0‑M‑1][914.2‑G‑2]
IIRV
Improved Inter-Range Vector
[502.0‑B‑2]
IKE
Internet Key Exchange
[350.6‑G‑1]
IKI
Institute of Space Research
[Agency List]
IMAX
Image Maximum
[706.1‑G‑1]
IMO
information management object
[312.0‑G‑1]
IMS
Integrated Management Subsytem
[706.1‑G‑1]
IMS
IP Multimedia Subsystem
[706.2‑G‑1]
IMS
Inventory Management System
[880.0‑G‑1]
IMU
Inertial Measurement Unit
[500.0‑G‑3]
IMU
Inertial Measurement Unit
[500.0‑G‑3]
INFOSEC
Information Security
[351.0‑M‑1]
INPE
Instituto De Pesquisas Espaciais
[401.0‑B‑22]
INPE
Instituto Nacional de Pesquisas Espaciais
[Agency List]
IO
information object
[312.0‑G‑1]
IOAG
Interagency Operations Advisory Group
[734.0‑G‑1][A02.1‑Y‑3]
IP
Internet Protocol
[130.0‑G‑2][130.2‑G‑2][350.6‑G‑1][351.0‑M‑1][702.1‑B‑1][706.1‑G‑1][706.2‑G‑1][714.0‑B‑2][734.0‑G‑1][873.0‑M‑1][880.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][913.1‑B‑1][914.1‑G‑1][914.2‑G‑2]
IP
Interaction Pattern
[521.1‑B‑1][523.1‑M‑1]
IP-MUX
IP Multiplexer, demultiplexer
[706.2‑G‑1]
IPE
Internet Protocol Extension
[702.1‑B‑1][722.1‑M‑1]
IPoC
IP over CCSDS
[702.1‑B‑1]
IPR
intellectual property rights
[350.7‑G‑1]
IPS
Intrusion Prevention System
[350.4‑G‑1]
IPSec
Internet Protocol Security
[351.0‑M‑1][352.0‑B‑1][880.0‑G‑1]
IPSec
IP Security
[734.0‑G‑1]
IPU
Image Processing Unit
[706.1‑G‑1]
IPv4
Internet Protocol Version 4
[210.0‑G‑1][211.0‑B‑4][702.1‑B‑1]
IPv6
Internet Protocol Version 6
[210.0‑G‑1][702.1‑B‑1]
IPv6
Internet Protocol, Version 6
[133.1‑B‑2]
IPX
Internetwork Packet Exchange
[706.2‑G‑1]
IR
Infrared
[880.0‑G‑1]
IrDA
Infrared Data Association
[880.0‑G‑1]
IRIG
Inter-Range Instrumentation Group
[706.1‑G‑1][706.2‑G‑1]
IRM
IERS Meridian
[500.0‑G‑3]
IRP
IERS Reference Pole
[500.0‑G‑3]
IRTF
Internet Research Task Force
[734.0‑G‑1]
ISA
Interconnection Security Agreement
[350.4‑G‑1][350.4‑G‑1][350.8‑G‑1]
ISACA
Informations Systems Audit and Control Association
[350.7‑G‑1]
ISAS
Institute of Space and Astronautical Science
[401.0‑B‑22]
ISBN
International Standard Book Number
[650.0‑M‑2][661.0‑B‑1]
ISDN
Integrated Services Digital Network
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
ISI
Intersymbol Interference
[880.0‑G‑1]
ISI
Inter-Symbol Interference
[413.0‑G‑2]
ISM
Industrial, Scientific and Medical
[880.0‑G‑1]
ISM
Industrial, Scientific, and Medical
[881.0‑M‑1]
ISMS
Information Security Management System
[350.7‑G‑1]
ISN
Initial Sequence Number
[714.0‑B‑2]
ISO
International Organization for Standardization
[620.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][610.0‑G‑5][622.0‑B‑1][641.0‑B‑2][641.0‑G‑2][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][650.0‑M‑2][651.0‑M‑1][651.1‑B‑1][652.0‑M‑1][652.1‑M‑1][661.0‑B‑1][722.1‑M‑1][880.0‑G‑1][881.0‑M‑1][910.2‑G‑1][910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1][A31.0‑G‑1]
ISO-BRM
ISO/IEC Basic Reference Model
[311.0‑M‑1]
ISP1
Internet SLE Protocol One
[913.1‑B‑1][914.1‑G‑1][914.2‑G‑2]
ISPR
International Standard Payload Rack
[706.1‑G‑1]
ISRO
Indian Space Research Organization
[Agency List][401.0‑B‑22]
ISS
International Space Station
[350.0‑G‑2][350.1‑G‑1][706.1‑G‑1]
IT
Information Technology
[350.1‑G‑1][350.4‑G‑1]
ITRF
International Terrestrial Reference Frame
[500.0‑G‑3][502.0‑B‑2][504.0‑B‑1][508.0‑B‑1]
ITRS
International Terrestrial Reference System
[500.0‑G‑3][502.0‑B‑2]
ITU
International Telecommunication Union
[131.4‑M‑1][211.1‑B‑3][401.0‑B‑22][413.0‑G‑2][706.1‑G‑1]
ITU-R
International Telecommunication Union - Radiocommunications
[880.0‑G‑1]
ITU-T
International Telecommunication Union – Telecommunications
[706.2‑G‑1]
ITU/RR
International Telecommunication Union Radio Regulations
[401.0‑B‑22]
IUP
Implementation Under Test
[A02.1‑Y‑3]
IV
Initialization Vector
[350.0‑G‑2]
IVA
Internal-Vehicle Activity
[880.0‑G‑1]
IVV
Independent Verification and Validation
[350.1‑G‑1]
JAXA
Japan Aerospace Exploration Agency
[Agency List][415.0‑G‑1][415.1‑B‑1][502.1‑Y‑1][506.0‑M‑1]
JEM
Japanese Experiment Module
[706.1‑G‑1]
JMS
Java Message Service
[520.0‑G‑3]
JMS
Java messaging service
[312.0‑G‑1]
JPEG
Joint Photographic Experts Group
[706.1‑G‑1]
JPL
Jet Propulsion Laboratory
[130.1‑G‑2][500.0‑G‑3][502.1‑Y‑1][506.0‑M‑1][610.0‑G‑5][910.0‑G‑2][910.0‑Y‑2]
JSC
Johnson Space Center
[706.1‑G‑1][706.2‑G‑1]
JSL
Joint Station LAN
[706.1‑G‑1]
JTC
Joint Technical Committee (of ISO)
[311.0‑M‑1]
JTC1
Joint Technical Committee One
[A31.0‑G‑1]
JVM
Java Virtual Machine
[523.1‑M‑1]
k
Kilo (thousands)
[401.0‑B‑22]
K
Kelvin
[503.0‑B‑1]
K
Degrees Kelvin
[401.0‑B‑22]
KARI
Korea Aerospace Research Institute
[Agency List]
KB
Kilobyte
[651.1‑B‑1]
kb/s
Kilobits per Second
[401.0‑B‑22][706.2‑G‑1]
kbps
kilobits per second
[714.0‑B‑2]
KEK
Key Encryption Key
[350.6‑G‑1]
KEK
Key-Encryption-Key
[350.8‑G‑1]
KEK
Key-Encryption-Key
[350.8‑G‑1]
KFKI
KFKI Research Institute for Particle & Nuclear Physics
[Agency List]
kHz
Kilohertz
[401.0‑B‑22]
km
Kilometers
[401.0‑B‑22]
KMP
Key Management Policy
[350.6‑G‑1]
KMPS
Key Management Practices Statement
[350.6‑G‑1]
ks
kilo-symbol
[415.0‑G‑1]
ks/s
kilosymbols per second
[415.1‑B‑1]
Ku
Ku-band (approximately 13 to 15 gigahertz)
[401.0‑B‑22]
KVN
Keyword = Value Notation
[502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][508.0‑B‑1]
L.O. or LO
Local Oscillator
[401.0‑B‑22]
LACW
Link ARQ Control Words
[700.0‑G‑3]
LAN
Local Area Network
[520.1‑M‑1][735.0‑G‑1][735.1‑B‑1][850.0‑G‑1][880.0‑G‑1]
LBT
Listen Before Talk
[881.0‑M‑1]
LCC
Lander Control Center
[734.0‑G‑1]
LCD
Liquid Crystal Display
[706.1‑G‑1]
LCP
Left-Hand Circular Polarization
[500.1‑G‑1][910.11‑B‑1][910.14‑G‑1]
LCP
Left Circular Polarization
[401.0‑B‑22]
LD
Laser Diode
[880.0‑G‑1]
LDAP
Lightweight Directory Access Protocol
[706.2‑G‑1]
LDC
Lossless Data Compression
[120.0‑G‑3]
LDP
Logical Data Path
[734.0‑G‑1]
LDP
Logical Data Paths
[700.0‑G‑3]
LDPC
Low-Density Parity-Check
[131.0‑B‑2][131.4‑M‑1]
LDPC
Low Density Parity Check
[130.1‑G‑2][131.3‑B‑1]
LDPCC
Low Density Parity Check Codes
[A01.2‑Y‑4.1]
LED
Light Emitting Diode
[880.0‑G‑1]
LEO
Low Earth Orbit
[131.4‑M‑1][350.1‑G‑1][350.6‑G‑1][351.0‑M‑1][415.0‑G‑1][415.1‑B‑1][500.0‑G‑3][722.1‑M‑1]
LEOP
Launch and Early Operation Phase
[131.4‑M‑1]
LEOP
Launch and Early Orbit Phase
[500.0‑G‑3]
LFSR
Linear Feedback Shift Register
[415.0‑G‑1][415.1‑B‑1]
LIDAR
Light Detection and Ranging
[503.0‑B‑1]
LIM or Lim
Limitation(s)
[401.0‑B‑22]
LIN or Lin
Linear
[401.0‑B‑22]
LLC
Low-Level Commanding
[734.0‑G‑1]
LLIF
Lower Layer Interface
[232.1‑B‑2]
LLRP
Low Level Reader Protocol
[881.0‑M‑1]
LLTM
Low-Level Telemetry
[734.0‑G‑1]
LNA
low noise amplifier
[500.1‑G‑1]
LO
local oscillator
[500.1‑G‑1]
LOCO
LOw COmplexity LOssless COmpression
[120.1‑G‑1]
LOS
Line of Sight
[880.0‑G‑1]
LPCM
Linear Pulse Code Modulation
[706.2‑G‑1]
LPF
Low Pass Filter
[413.0‑G‑2]
LR-WPAN
Low-Rate Wireless Personal Area Network
[880.0‑G‑1]
LRV
Lunar Rover Vehicle
[880.0‑G‑1]
LRV
last reported value OR last recorded value
[660.1‑G‑1]
LSB
Least Significant Bit
[120.0‑G‑3][121.0‑B‑2][506.1‑B‑1][620.0‑B‑2][644.0‑B‑3][645.0‑G‑1]
LSB
least significant bit; least significant byte
[660.1‑G‑1]
LSB
lower sideband
[500.1‑G‑1]
LSO
Least Significant Octet
[644.0‑B‑3]
LTP
Licklider Transmission Protocol
[734.0‑G‑1]
LTP
Licklider Transport Protocol
[734.0‑G‑1]
LV
Length-Value
[727.0‑B‑4]
LVLH
Local Vertical Local Horizontal
[500.0‑G‑3][504.0‑B‑1]
LVO
Label Value Object
[622.0‑B‑1][631.0‑G‑2][632.0‑B‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1]
LVO
LABEL-VALUE Object
[620.0‑B‑2]
LVO
LABEL-VALUE-Object
[621.0‑G‑1]
LZW
Lempel Ziv Welch
[120.0‑G‑3]
M
Mega (million)
[401.0‑B‑22]
m
Meter(s)
[401.0‑B‑22]
M
Metadata
[720.1‑G‑3]
M
Mandatory
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
M&C
Monitoring and Control
[520.0‑G‑3]
M-P
Management Provider Port
[912.3‑B‑2]
M-P
Management Provider Service Port
[912.11‑O‑1][912.1‑B‑3]
M-U
Management User port
[912.3‑B‑2]
M-U
Management User Service Port
[912.11‑O‑1][912.1‑B‑3]
M_PDU
Multiplexing Protocol Data Unit
[700.0‑G‑3]
MA
Multiple Access
[415.0‑G‑1]
MAC
Medium Access Control
MAC
Media Access Control
[880.0‑G‑1][881.0‑M‑1]
MAC
Media Access Control
[210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1]
MAC
Message Authentication Code
[350.3‑G‑1][350.8‑G‑1][351.0‑M‑1][352.0‑B‑1]
MACAO
Member Agency Control Authority Office
[621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1][645.0‑G‑1][646.0‑G‑1][647.1‑B‑1][647.2‑B‑1]
MADP
Meta-AMS Delivery Point
[735.0‑G‑1][735.1‑B‑1][875.0‑M‑1]
MAE
Maximum Absolute Error
[120.1‑G‑1]
MAI
Multiple Access Interference
[415.1‑B‑1]
MAL
Message Abstraction Layer
[520.0‑G‑3][734.0‑G‑1]
MAL
Message Abstract Layer
[520.1‑M‑1][521.0‑B‑2][521.1‑B‑1][523.1‑M‑1]
MAMS
Meta-AMS
[735.0‑G‑1][735.1‑B‑1][875.0‑M‑1]
MAP
Multiplexer Access Point
[130.0‑G‑2][130.2‑G‑2][133.0‑B‑1][200.0‑G‑6][232.0‑B‑2][732.0‑B‑2][916.3‑M‑1]
MAP
Maximum a posteriori probability
[130.1‑G‑2]
MAP
Multiplexer
[912.3‑B‑2]
MAP ID
Multiplexer Access Point Identifier
[130.2‑G‑2][133.0‑B‑1][232.0‑B‑2][702.1‑B‑1][732.0‑B‑2]
MAPA
Multiplexer Access Point Access
[130.2‑G‑2][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2]
MAPP
Multiplexer Access Point Packet
[130.2‑G‑2][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2]
MAPP
Multiplexer Access Point Packet (Service)
[702.1‑B‑1]
MARC
MAchine-Readable Cataloging
[651.0‑M‑1]
MASAP
Memory Access Service Access Point
[852.0‑M‑1]
MAX or Max
Maximum
[401.0‑B‑22]
MB
Megabyte
[651.1‑B‑1]
MB-OFDM
Multi-Band Orthogonal Frequency Division Multiplexing
[880.0‑G‑1]
MC
Master Channel
[130.0‑G‑2][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2][910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3][910.4‑B‑2][914.2‑G‑2][915.2‑M‑1][915.5‑M‑1]
Mc
mega-chip
[415.0‑G‑1]
MC_FSH
Master Channel Frame Secondary Header
[130.2‑G‑2]
MC_OCF
Master Channel Operational Control Field
[130.2‑G‑2]
MCC
Mission Control Center
[520.0‑G‑3][722.1‑M‑1][734.0‑G‑1]
MCC-H
Mission Control Center-Houston
[706.1‑G‑1]
MCC-M
Mission Control Center-Moscow
[706.1‑G‑1]
MCF
Master Channel Frame
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2]
MCID
Master Channel Identifier
[130.0‑G‑2][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][732.0‑B‑2]
MCID
Master Channel Identification
[910.3‑G‑3][910.4‑B‑2]
MCS
Mission Control System
[520.0‑G‑3][520.1‑M‑1][521.1‑B‑1][660.0‑G‑1]
MD5
Message Digest 5
[350.3‑G‑1]
MDOS
Mission Data Operation System
[910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][914.1‑G‑1]
MDOS
Mission Data Operations System
[910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1]
MDSD
Model Driven System Design
[311.0‑M‑1]
MEO
Medium Earth Orbit
[131.4‑M‑1][350.1‑G‑1][351.0‑M‑1]
MER
Mars Exploration Rover
[120.1‑G‑1][734.0‑G‑1][740.0‑G‑1]
MER
NASA Mars Exploration Rover
[210.0‑G‑1]
MET
Mission Elapsed Time
[872.0‑M‑1]
METS
Metadata Encoding and Transmission Standard
[661.0‑B‑1]
MEX
Mars Express
[740.0‑G‑1]
MEX
ESA Mars Express Orbiter
[211.0‑B‑4]
MF
Minor Frame
[660.0‑G‑1]
MHz
Megahertz
[401.0‑B‑22]
MI
multiple-interrogator
[881.0‑M‑1]
MIB
Management Information Base
[210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][720.1‑G‑3][722.1‑M‑1][727.0‑B‑4][735.0‑G‑1][735.1‑B‑1][740.0‑G‑1][850.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][853.0‑M‑1][854.0‑M‑1][854.0‑M‑1][855.0‑M‑1][855.0‑M‑1][871.0‑M‑1][871.1‑M‑1][871.2‑M‑1][872.0‑M‑1][873.0‑M‑1][875.0‑M‑1][910.2‑G‑1]
MIF
Management Interface
[914.0‑M‑1]
MIME
Multipurpose Internet Mail Extensions
[651.1‑B‑1][661.0‑B‑1]
MIMO
Multiple-input, multiple-output
[880.0‑G‑1]
MIN or Min
Minimum
[401.0‑B‑22]
MISO
Multiple-input, single-output
[880.0‑G‑1]
MIT
Massachusetts Institute of Technology
[350.4‑G‑1]
MJD
Modified Julian Date
[301.0‑B‑4]
MMI
Man Machine Interface
[910.3‑G‑3]
MMU
Memory Management Unit
[735.0‑G‑1]
MO
Mission Operations
[520.0‑G‑3][520.1‑M‑1][521.0‑B‑2][521.1‑B‑1][523.1‑M‑1]
MO
month
[301.0‑B‑4]
MoA
Memorandum of Agreement
[351.0‑M‑1]
MOC
Mission Operations Center
[415.0‑G‑1][415.1‑B‑1]
MOC
Ministry of Communications
[Agency List]
Mod
Modulation
[401.0‑B‑22]
MODCOD
Modulation and Coding identifier of the DVB-S2 standard
[131.3‑B‑1]
MOF
Meta Object Facility
[311.0‑M‑1]
MOF
meta-object facility
[312.0‑G‑1]
MOIMS
Mission Operations and Information Management Services
[503.0‑B‑1][505.0‑B‑1][506.0‑M‑1][A02.1‑Y‑3]
MOIMS
Mission Operations & Information Management Services
[735.0‑G‑1]
MOIMS
Mission Operations and Information Management Systems
[520.0‑G‑3][660.0‑G‑1]
MOT
Model of Objects for Transfer
[651.1‑B‑1]
MOTIS
Message-Oriented Text Interchange System
[910.2‑G‑1]
MoU
Memorandum of Understanding
[351.0‑M‑1]
MOU/A
Memorandum of Understanding/Agreement
[350.4‑G‑1][350.8‑G‑1]
MOVE
Mission Operations Voice Enhancement
[706.2‑G‑1]
MPC
Multi-Protocol Converter
[706.1‑G‑1]
MPDU
Multiplexing Protocol Data Unit
[120.0‑G‑3]
MPDU
Meta-AMS PDU
[735.0‑G‑1][735.1‑B‑1][875.0‑M‑1]
MPDU
Multiplex Protocol Data Unit
[350.0‑G‑2]
MPEG
Moving Picture Experts Group
[650.0‑M‑2]
MPEG
Moving Pictures Experts Group
[131.3‑B‑1][706.1‑G‑1]
MPLS
Multi-Protocol Label Switching
[706.1‑G‑1][706.2‑G‑1]
MPS
Mission Planning System
[660.0‑G‑1]
MRELP
Modified Residual Excited Linear Predictive
[706.2‑G‑1]
MRO
Mars Reconnaissance Orbiter
[740.0‑G‑1]
MRO
NASA Mars Reconnaissance Orbiter
[210.0‑G‑1]
Ms/s
Mega Symbols Per Second
[413.0‑G‑2]
MSB
Most Significant Bit
[121.0‑B‑2][122.0‑B‑1][123.0‑B‑1][131.0‑B‑2][131.3‑B‑1][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][231.0‑B‑2][232.0‑B‑2][301.0‑B‑4][506.1‑B‑1][620.0‑B‑2][644.0‑B‑3][645.0‑G‑1][660.0‑G‑1][702.1‑B‑1][720.1‑G‑3][727.0‑B‑4][732.0‑B‑2][735.0‑G‑1][735.1‑B‑1][740.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][871.1‑M‑1][872.0‑M‑1]
MSB
most significant bit; most significant byte
[660.1‑G‑1]
MSE
Mean Squared Error
[120.1‑G‑1]
MSFC
Marshall Space Flight Center
[706.1‑G‑1]
MSG
Meteosat Second Generation
[350.0‑G‑2]
MSL
Mars Science Laboratory
[740.0‑G‑1]
MSL
Maximum Segment Lifetime
[913.1‑B‑1]
MSM
Manned Space & Microgravity
[706.1‑G‑1]
MSM-CI
MSM Communications Infrastructure
[706.1‑G‑1]
MSO
Most Significant Octet
[620.0‑B‑2][644.0‑B‑3]
MSS
Maximum Segment Size
[714.0‑B‑2]
MTS
Message Transfer Service
[735.0‑G‑1][850.0‑G‑1][875.0‑M‑1]
MTU
Maximum Transmission Unit
[706.1‑G‑1][851.0‑M‑1][913.1‑B‑1]
MUE
Mission User Entity
[910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][914.1‑G‑1]
MUSC
Microgravity User Support Centre
[706.1‑G‑1]
MVC
model-view controller
[312.0‑G‑1]
MVDS
MPEG-2 Video Distribution Service
[706.1‑G‑1]
n
Nano
[401.0‑B‑22]
N(R)
Last acknowledged frame sequence number +1
[210.0‑G‑1][211.0‑B‑4]
N(R)
Next Expected Frame Sequence Number reported in the CLCW
[912.3‑B‑2]
N(R)
The Next Expected Frame Sequence Number in a CLCW
[232.1‑B‑2]
N(R)
The Value of V(R) Which Is Observed by the FOP in a Particular CLCW
[200.0‑G‑6]
N(S)
Frame Sequence Number within the Proximity-1 Frame Header
[211.0‑B‑4]
N(S)
The Frame Sequence Number in the Transfer Frame Primary Header
[232.1‑B‑2]
N(S)
The Sequence Number Assigned by the FOP to a Particular Transmitted TC Frame
[200.0‑G‑6]
N/A
Not Applicable
[130.0‑G‑2][631.0‑G‑2][632.0‑B‑1]
N/A or n/a
Not Applicable / Not Available
[503.0‑B‑1]
N2
‘N Squared’ diagram
[311.0‑M‑1]
NA
Not Applicable
[131.3‑B‑1]
NAK
Negative Acknowledgement
[727.0‑B‑4]
NAK
Negative Acknowledgment
[720.1‑G‑3]
NAL
Network Abstraction Layer
[706.1‑G‑1]
NaN
Not A Number
[521.0‑B‑2]
NASA
National Aeronautics and Space Administration
[Agency List][210.0‑G‑1][401.0‑B‑22][415.1‑B‑1][502.1‑Y‑1][506.0‑M‑1]
NASDA
National Space Development Agency of Japan
[401.0‑B‑22]
NAVSTAR
Navigation Satellite Timing and Ranging System
[500.0‑G‑3]
NCC
Network Control Center
[720.1‑G‑3][727.0‑B‑4]
NCO
Numerically Controlled Oscillator
[414.0‑G‑1]
NCST
Naval Center for Space Technology
[Agency List]
NDM
Navigation Data Message
[505.0‑B‑1][508.0‑B‑1]
ndm
Navigation Data Message tag
[505.0‑B‑1]
NEO
Near Earth Object
[706.2‑G‑1]
NHK
Nippon Hoso Kyokai
[706.1‑G‑1]
NI
Network Infrastructure
[706.1‑G‑1]
NIB
Non-interference Basis
[880.0‑G‑1]
NICT
National Institute of Information and Communications Technology
[Agency List]
NIF
Network Interface
[914.0‑M‑1]
NIS
Network Infrastructure Subsystem
[706.1‑G‑1]
NIST
National Institute of Standards and Technology
[350.2‑G‑1][350.4‑G‑1][352.0‑B‑1]
NLOS
Non-Line-of-Sight
[880.0‑G‑1]
NN(R)
Expected_Acknowledgement_Frame_Sequence_Number
[912.3‑B‑2]
NN(R)
Expected_Acknowledgement_Frame_Sequence_Number (the value of N(R) from the previous CLCW on the same Virtual Channel)
[232.1‑B‑2]
NN(R)
Previous acknowledged frame sequence number +1
[211.0‑B‑4]
NOAA
National Oceanic and Atmospheric Administration
[Agency List][401.0‑B‑22]
NOCC
Network Operations Control Center
[740.0‑G‑1]
NORAD
North American Aerospace Defense Command
[502.0‑B‑2]
NP
Networking Protocol
[850.0‑G‑1]
NRZ
Non-Return to Zero
[120.0‑G‑3][130.1‑G‑2][401.0‑B‑22][413.0‑G‑2]
NRZ-L
Non-Return to Zero-Level
[401.0‑B‑22][910.11‑B‑1][910.14‑G‑1]
NRZ-L
Non-Return-to-Zero-Level
[131.0‑B‑2]
NRZ-M
Non-Return-to-Zero-Mark
[131.0‑B‑2][231.0‑B‑2]
NRZ-M
Non-Return to Zero-Mark
[401.0‑B‑22][910.11‑B‑1][910.14‑G‑1]
NRZ-S
Non-Return to Zero-Space
[401.0‑B‑22]
ns
Nanosecond(s)
[401.0‑B‑22]
NSARK
National Space Agency of the Republic of Kazakhstan
[Agency List]
NSF
National Science Foundation
[312.0‑G‑1]
NSPO
National Space Organization
[Agency List]
NSSDC
National Space Science Data Center
[610.0‑G‑5]
NTP
Network Time Protocol
[301.0‑B‑4]
NTP
Timing Network Time Protocol
[706.1‑G‑1]
NTSC
National Standards Television Committee
[706.1‑G‑1]
NTW
Normal, Tangential (to velocity vector) and Normal to Orbit Plane
[504.0‑B‑1]
NVO
National Virtual Observatory
[312.0‑G‑1]
NW
FARM_Negative_Window_Width
[232.1‑B‑2]
NWK
Network (layer)
[880.0‑G‑1]
O/O
Owner/Operator
[508.0‑B‑1]
OAIS
Open Archival Information System
[312.0‑G‑1][650.0‑M‑2][651.0‑M‑1][651.1‑B‑1][652.0‑M‑1][652.1‑M‑1][661.0‑B‑1][A01.2‑Y‑4.1]
OASIS
Organization for the Advancement of Structured Information Standards
[910.11‑B‑1][910.14‑G‑1]
OBC
Onboard Computer
[500.0‑G‑3][873.0‑M‑1]
OBDH
OnBoard Data Handling
[740.0‑G‑1][880.0‑G‑1]
OBO
Output Back-off
[413.0‑G‑2]
OBS
Observations
[508.0‑B‑1]
OCA
Orbital Communications Adapter
[706.1‑G‑1]
OCC
Operational Control Centre
[350.6‑G‑1]
OCC
Orbiter Control Center
[734.0‑G‑1]
OCF
Operational Control Field
[130.0‑G‑2][132.0‑B‑1][910.0‑G‑2][910.0‑Y‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
OCF
Operation Control Field
[910.3‑G‑3][910.4‑B‑2]
OCL
Object Constraint Language
[913.1‑B‑1][914.0‑M‑1]
OCR
Operational Control Room
[706.1‑G‑1]
OD
Orbit Determination
[502.0‑B‑2][508.0‑B‑1]
ODAR
Obsolescence Driven Avionics Redesign
[706.1‑G‑1]
ODB
Operational Database
[660.0‑G‑1]
ODL
Object Description Language
[312.0‑G‑1][641.0‑G‑2]
ODM
Orbit Data Message
[502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][910.11‑B‑1][910.14‑G‑1][A01.2‑Y‑4.1]
ODM
Orbit Data Message
[502.0‑B‑2][502.1‑Y‑1][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][910.11‑B‑1][910.14‑G‑1][A01.2‑Y‑4.1]
ODP
Open Distributed Processing
[311.0‑M‑1]
ODY
Mars Odyssey
[740.0‑G‑1]
ODY
NASA Mars Survey Project 2001 Odyssey Orbiter
[211.0‑B‑4]
OEM
Orbit Ephemeris Message
[502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][506.0‑M‑1][910.11‑B‑1][910.14‑G‑1]
oem
Orbit Ephemeris Message tag
[505.0‑B‑1]
OFDM
Orthogonal Frequency Division Multiplexing
[880.0‑G‑1]
OI
Organization Identifier
[A31.0‑G‑1]
OID
Only Idle Data in its Data Field
[131.3‑B‑1]
OMG
Object Management Group
[311.0‑M‑1][312.0‑G‑1][520.0‑G‑3][660.0‑B‑1][660.0‑G‑1][910.11‑B‑1][910.14‑G‑1][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1]
OMG
Object Management Group, Inc.
[660.1‑G‑1]
OMM
Orbit Mean Elements Message
[505.0‑B‑1]
omm
Orbit Mean Elements Message tag
[505.0‑B‑1]
OMM
Orbit Mean-Elements Message
[502.0‑B‑2]
OMT
Organization Management Team
[706.1‑G‑1]
OODT
object-oriented data technology
[312.0‑G‑1]
OOK
On-Off Keying
[880.0‑G‑1]
OPM
Orbit Parameter Message
[500.0‑G‑3][502.0‑B‑2][503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][910.11‑B‑1][910.14‑G‑1]
opm
Orbit Parameter Message tag
[505.0‑B‑1]
OQPSK
Offset Quadrature Phase Shift Keying
[413.0‑G‑2]
OQPSK
Offset Quadra-Phase Shift Keying [modulation]
[401.0‑B‑22]
OQPSK
offset quaternary/quadrature/quadra phase shift key
[910.11‑B‑1][910.14‑G‑1]
OQPSK I/Q
I/Q Modulated Offset Quadrature Phase Shift Keying
[413.0‑G‑2]
OQPSK/PM
Phase Modulated Offset Quadrature Phase Shift Keying
[413.0‑G‑2]
OS
Operating System
[311.0‑M‑1]
OSC
Oscillator
[413.0‑G‑2]
OSI
Open Systems Interconnection
[131.0‑B‑2][131.3‑B‑1][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][230.1‑G‑2][231.0‑B‑2][232.0‑B‑2][232.1‑B‑2][301.0‑B‑4][351.0‑M‑1][610.0‑G‑5][700.0‑G‑3][702.1‑B‑1][720.1‑G‑3][727.0‑B‑4][732.0‑B‑2][735.0‑G‑1][735.1‑B‑1][740.0‑G‑1][850.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][871.0‑M‑1][871.1‑M‑1][871.2‑M‑1][872.0‑M‑1][873.0‑M‑1][875.0‑M‑1][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.3‑B‑2][913.1‑B‑1][914.1‑G‑1][914.2‑G‑2][A02.1‑Y‑3]
OSI
Open System Interconnection
[910.2‑G‑1][912.11‑O‑1][912.1‑B‑3]
OSLP
Overview of Space Link Protocols
[311.0‑M‑1]
OSPF
Open Shortest Path First
[135.0‑B‑4][702.1‑B‑1]
OTAR
Over-The-Air-Rekeying
[350.6‑G‑1]
OV
Operational View (of DoDAF)
[311.0‑M‑1]
OWL
Web Ontology Language
[312.0‑G‑1][661.0‑B‑1]
OWLT
One Way Light Time
[500.0‑G‑3]
P-field
Preamble Field
[301.0‑B‑4]
P-frame
Supervisory/Protocol Frame
[210.0‑G‑1][211.0‑B‑4]
P-frame
Protocol/supervisory frames
[211.1‑B‑3]
P-ID
Path Identifier
[135.0‑B‑4‑S]
PABX
Private Automatic Branch Exchange
[706.2‑G‑1]
PAIMAS
Producer-Archive Interface Methodology Abstract Standard
[651.1‑B‑1][A01.2‑Y‑4.1]
PAIS
Producer-Archive Interface Specification
[651.1‑B‑1]
PAL
Phase Alternating Line
[706.1‑G‑1]
PAL
Protocol Adaptation Layer
[880.0‑G‑1]
PAN
Personal Area Network
[880.0‑G‑1]
PAR
Parity indicator
[230.1‑G‑2]
PAWS
Protect Against Wrapped Sequence Numbers
[714.0‑B‑2]
PB
Petabyte
[651.1‑B‑1]
PC
Physical Channel
[211.0‑B‑4]
Pc
Carrier power
[401.0‑B‑22]
Pc/No
Carrier Power to Noise Spectral Density ratio
[503.0‑B‑1]
PCA
Priority Contention Access
[880.0‑G‑1]
PCA_PDU
Physical Channel Access Protocol Data Unit
[350.0‑G‑2]
PCB
Printed Circuit Board
[880.0‑G‑1]
PCB
Payload Confidentiality Block
[734.0‑G‑1]
PCC
Payload Control Center
[734.0‑G‑1]
PCI
Protocol Control Information
[851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][855.0‑M‑1][872.0‑M‑1][875.0‑M‑1]
PCID
Physical Channel Identifier
[130.0‑G‑2]
PCID
Physical Channel ID
[211.0‑B‑4][702.1‑B‑1]
PCM
Pulse Code Modulation
[210.0‑G‑1][211.0‑B‑4][401.0‑B‑22][660.0‑B‑1][706.1‑G‑1][880.0‑G‑1][910.11‑B‑1][910.14‑G‑1]
PDA
Personal Digital Assistant
[880.0‑G‑1]
PDAP
Planetary Data Access Protocol
[312.0‑G‑1]
pdf
Probability Distribution Function
[120.0‑G‑3]
PDF
Probability Density Function
[401.0‑B‑22]
PDF
Portable Document Format
[650.0‑M‑2][651.0‑M‑1][A02.1‑Y‑3]
PDI
Preservation Description Information
[650.0‑M‑2][651.0‑M‑1][652.0‑M‑1][661.0‑B‑1]
PDP
Production Data Processing
[700.0‑G‑3]
PDS
planetary data system
[312.0‑G‑1]
PDSAP
Packet Destination SAP Address
[851.0‑M‑1][875.0‑M‑1]
PDU
Protocol Data Unit
[210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][311.0‑M‑1][520.0‑G‑3][700.0‑G‑3][702.1‑B‑1][720.1‑G‑3][727.0‑B‑4][734.0‑G‑1][735.0‑G‑1][735.1‑B‑1][740.0‑G‑1][850.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][872.0‑M‑1][875.0‑M‑1][910.11‑B‑1][910.14‑G‑1][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][913.1‑B‑1][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][915.5‑M‑1][916.1‑M‑1][916.3‑M‑1][A02.1‑Y‑3]
PFD
Power Flux Density
[401.0‑B‑22][415.0‑G‑1][415.1‑B‑1]
PGP
Pretty Good Privacy
[350.2‑G‑1]
PGS
Procedure Generation System
[660.0‑G‑1]
PHY
Physical (layer)
[880.0‑G‑1][881.0‑M‑1]
PI
principal investigator
[350.0‑G‑2]
PIB
Payload Integrity Block
[734.0‑G‑1]
PICS
Protocol Implementation Conformance Statement
[714.0‑B‑2][740.0‑G‑1][A02.1‑Y‑3]
PID
Packet ID
[706.1‑G‑1]
PIF
Proxy Interface
[914.0‑M‑1]
PIM
Protocol-Independent Multicast
[135.0‑B‑4]
PIM
Platform Independent Model
[520.0‑G‑3]
pIMOs
primitive information management objects
[312.0‑G‑1]
PIN
password/personal identification number
[350.8‑G‑1]
Pk or pk
Peak
[401.0‑B‑22]
PKI
Public Key Infrastructure
[311.0‑M‑1][350.3‑G‑1][350.6‑G‑1][350.8‑G‑1][352.0‑B‑1][910.14‑G‑1]
PKT
packet
[200.0‑G‑6]
Pkt
packet
[740.0‑G‑1]
PL
Physical Layer
[131.2‑B‑1]
PLCW
Proximity Link Control Word
[210.0‑G‑1][211.0‑B‑4]
PLFRAME
Physical Layer Frame in the DVB-S2 standard
[131.3‑B‑1]
PLHEADER
Header of the PLFRAME in the DVB-S2 standard
[131.3‑B‑1]
PLL
Phase Locked Loop
[401.0‑B‑22][506.0‑M‑1]
PLOP
Physical Link Operations Procedure
[200.0‑G‑6][230.1‑G‑2][231.0‑B‑2][910.4‑B‑2][910.11‑B‑1][910.14‑G‑1][912.11‑O‑1][912.1‑B‑3]
PLOP
Physical Layer Operations Procedure
[230.1‑G‑2][231.0‑B‑2][910.11‑B‑1][910.14‑G‑1][912.11‑O‑1][912.1‑B‑3]
PLOP
Physical Link Operating Procedure
[910.3‑G‑3]
PLR
Position Location Register
[230.1‑G‑2]
PLTU
Proximity Link Transmission Unit
[210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1]
PLTU
Proximity-1 Link Transmission Unit
[211.2‑B‑1]
PM
Phase Modulation
[401.0‑B‑22][880.0‑G‑1][910.11‑B‑1][910.14‑G‑1]
PM
Phase Modulated
[130.1‑G‑2][413.0‑G‑2]
PMP
Point-to-Multipoint
[880.0‑G‑1]
PN
Pseudo Noise
[401.0‑B‑22][414.0‑G‑1]
PN
Pseudo-random Noise
[415.0‑G‑1][415.1‑B‑1]
PN
Pseudonoise
[880.0‑G‑1]
PN
Pseudo-Noise
[211.1‑B‑3][414.1‑B‑1]
POC
Point of Contact
[350.4‑G‑1]
POIC
Payload Operations Integration Center
[706.1‑G‑1]
POSIX
Portable Operating System Interface
[872.0‑M‑1]
PPM
Pulse Position Modulation
[880.0‑G‑1]
ppm
parts per million
[401.0‑B‑22][414.1‑B‑1]
PPP
Point-to-Point Protocol
[702.1‑B‑1]
PPS
pulse-per-second
[872.0‑M‑1]
Pr/No
Ranging Power to Noise Spectral Density ratio
[503.0‑B‑1]
PRARE
Precise Range and Range Rate Equipment
[503.0‑B‑1]
PRL
PICS Requirements List
[A02.1‑Y‑3]
PRMPT
Prompt
[720.1‑G‑3]
PRN
Pseudo Random Noise
[401.0‑B‑22]
PRN
Pseudo-Random Number
[350.6‑G‑1]
Prox
Proximity-1 Space Link Protocol
Prox-1
Proximity-1
[702.1‑B‑1][740.0‑G‑1]
PSAP
packet service access point
[851.0‑M‑1]
PSAS
Packet Store Access Service
[873.0‑M‑1]
PSASAP
Packet Store Access Service Access Point
[873.0‑M‑1]
PSAT
Predicted Site Acquisition Tables
[910.14‑G‑1]
PSD
Power Spectral Density
[413.0‑G‑2][415.0‑G‑1][415.1‑B‑1]
PSI
Program Specific Information
[706.1‑G‑1]
PSK
Phase Shift Key/Keyed/Keying
PSK
Phase Shift Key
[120.0‑G‑3][131.4‑M‑1][910.11‑B‑1][910.14‑G‑1]
PSK
Phase Shift Keyed
[210.0‑G‑1][211.0‑B‑4]
PSK
Phase-Shift Keying
[880.0‑G‑1]
PSK
Phase Shift Keying
[130.1‑G‑2][401.0‑B‑22][415.0‑G‑1]
PSM
Platform Specific Model
[520.0‑G‑3]
PSMS
Packet Store Management Service
[873.0‑M‑1]
PSMSAP
Packet Store Management Service Access Point
[873.0‑M‑1]
PSNR
Peak Signal to Noise Ratio
[120.1‑G‑1]
PSSAP
Packet Source SAP Address
[851.0‑M‑1][875.0‑M‑1]
PT/No
Total Power to Noise Spectral Density ratio
PTAB
Primary TDR Authorisation Body
[652.1‑M‑1]
PTL
Protocol Testing Laboratory
[720.3‑G‑1]
PTone/No
Tone Power to Noise Spectral Density ratio
[500.1‑G‑1]
PTS
Primary Transport Service
[735.0‑G‑1][735.1‑B‑1]
PTT
Press to Talk
[706.2‑G‑1]
PUS
Packet Utilisation Standard
[740.0‑G‑1]
PVC
Permanent Virtual Connection/Circuit
[706.2‑G‑1]
PVL
Parameter Value Language
[312.0‑G‑1][505.0‑B‑1][620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][631.0‑G‑2][632.0‑B‑1][641.0‑B‑2][641.0‑G‑2][647.1‑B‑1][647.2‑B‑1][651.0‑M‑1]
PVN
Packet Version Number
[130.0‑G‑2][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][232.0‑B‑2][702.1‑B‑1][732.0‑B‑2]
PVt
Position, Velocity and time
[500.0‑G‑3]
PW
FARM_Positive_Window_Width
[232.1‑B‑2]
PWR
Power
[401.0‑B‑22]
QA
Quality Assurance
[650.0‑M‑2]
QAM
Quadrature Amplitude Modulation
[130.1‑G‑2][880.0‑G‑1]
QO
query object
[312.0‑G‑1]
QoS
Quality of Service
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][210.0‑G‑1][211.0‑B‑4][232.0‑B‑2][520.0‑G‑3][520.1‑M‑1][521.0‑B‑2][523.1‑M‑1][732.0‑B‑2][734.0‑G‑1][735.0‑G‑1][850.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][875.0‑M‑1][880.0‑G‑1]
QPN
QPSK (not staggered) with PN spreading
[415.1‑B‑1]
QPSK
Quadrature Phase Shift Keying
[131.0‑B‑2][415.1‑B‑1]
QPSK
Quadra-Phase Shift Keying [modulation]
[401.0‑B‑22]
QPSK
Quadrature Phase-Shift Keying
[880.0‑G‑1]
QPSK
Quaternary Phase Shift Keying
[131.3‑B‑1]
QPSK
quaternary/quadrature/quadra phase shift key
[910.11‑B‑1][910.14‑G‑1]
QSIG
Q Signaling
[706.2‑G‑1]
r
range
[401.0‑B‑22]
R
Return
[211.1‑B‑3]
R-S
Reed-Solomon
[131.0‑B‑2][210.0‑G‑1][211.0‑B‑4][230.1‑G‑2][700.0‑G‑3]
r.v.
random variable
[414.0‑G‑1]
RA
Restricted ASCII
[620.0‑B‑2][621.0‑G‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
RA
Registration Authority
[350.6‑G‑1]
RA
Right Ascension
[500.0‑G‑3]
RA
Right Ascension
Rad
Radian
[401.0‑B‑22]
RAD
RAD Data Communications
[706.2‑G‑1]
RADEC
Right Ascension-Declination
[503.0‑B‑1]
RADEC
Right Ascension (or Hour Angle) and Declination antenna
[500.0‑G‑3]
RADIUS
Remote Authentication Dial In User Service
[350.4‑G‑1]
RADIUS
Remote Authentication Dial-In User Service
[350.4‑G‑1]
RAF
Return All Frames
[740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1]
RAMS
Remote AMS
[735.0‑G‑1][735.1‑B‑1][875.0‑M‑1]
RAND
Reasonable And Non-Discriminatory
[A02.1‑Y‑3]
RASDS
Reference Architecture for Space Data Systems
[311.0‑M‑1][312.0‑G‑1][351.0‑M‑1][520.0‑G‑3][A01.2‑Y‑4.1]
RASIM
Reference Architecture for Space Information Systems
[311.0‑M‑1]
RASIM
Reference Architecture for Space Information Management
[312.0‑G‑1]
Rb
Information bit rate
[413.0‑G‑2]
RC
resistor-capacitor
[415.0‑G‑1]
RCF
Return Channel Frames
[740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][911.2‑B‑2][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.2‑M‑1]
RCF
Return (Virtual) Channel Frames
[311.0‑M‑1]
RChS
Channel symbol rate
[413.0‑G‑2]
RCP
Right-hand Circular Polarization
[500.1‑G‑1][910.11‑B‑1][910.14‑G‑1]
RCP
Right Circular Polarization
[401.0‑B‑22]
RCS
Radar Cross Section
[508.0‑B‑1]
RCVR or Rcvr
Receiver
[401.0‑B‑22]
RD
Reference Document
[910.0‑G‑2][910.0‑Y‑2]
RDEF
Raw Data Exchange Format
[506.1‑B‑1]
RDF
Resource Description Framework
[312.0‑G‑1][661.0‑B‑1]
Rec
Receive
[401.0‑B‑22]
REF or Ref
Reference
[401.0‑B‑22]
regen.
regenerative
[401.0‑B‑22]
resid.
residual
[401.0‑B‑22]
RF
Radio Frequency
[120.0‑G‑3][130.1‑G‑2][210.0‑G‑1][211.0‑B‑4][230.1‑G‑2][311.0‑M‑1][350.0‑G‑2][350.1‑G‑1][351.0‑M‑1][401.0‑B‑22][413.0‑G‑2][415.0‑G‑1][415.1‑B‑1][500.1‑G‑1][506.0‑M‑1][740.0‑G‑1][880.0‑G‑1][881.0‑M‑1][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][916.3‑M‑1]
RF, rf
Radio Frequency
[200.0‑G‑6]
RFC
Request For Comments
[714.0‑B‑2][913.1‑B‑1][914.1‑G‑1][914.2‑G‑2]
RFC
Requests for Comments
[734.0‑G‑1]
RFC
Request for Comment (Internet standards)
[311.0‑M‑1]
RFC
Request for Comment
[702.1‑B‑1]
RFDC
Radio Frequency Data Collection
RFI
Radio Frequency Interference
[130.1‑G‑2][401.0‑B‑22]
RFID
Radio Frequency Identification
[880.0‑G‑1][881.0‑M‑1]
RFIS
Radio Frequency Identification Systems
[881.0‑M‑1]
RFP-FG
Return Frame Processing Functional Group
[911.2‑B‑2][911.5‑B‑2]
RFSA
Russian Federal Space Agency
[706.1‑G‑1]
RFSH
Return Frame Secondary Header
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
RGB
Red, Green, Blue
[706.1‑G‑1]
RHCP
Right Hand Circular Polarized
[211.0‑B‑4]
RID
Review Item Discrepancy
[502.1‑Y‑1]
RID
Review Item Disposition
[A02.1‑Y‑3]
RINEX
Receiver Independent Exchange
[503.0‑B‑1]
RINEX
Receiver Independent Exchange Format
[500.0‑G‑3]
RIPEMD
RACE Integrity Primitives Evaluation Message Digest
[350.3‑G‑1]
RLIN
Rotatable Linear polarization
[401.0‑B‑22]
RM
Reference Model
[651.0‑M‑1]
RM-ODP
Reference Model-Open Distributed Processing
[311.0‑M‑1]
RMA
Reliability, Maintainability, Availability
[706.2‑G‑1]
RMAP
Remote Memory Access Protocol
[850.0‑G‑1]
rms
root meansquare
rms
Root Mean Square
[401.0‑B‑22][415.1‑B‑1]
RMS
Root Mean Square
[508.0‑B‑1]
Rng
Ranging
[401.0‑B‑22]
RNG
Random Number Generation
[350.6‑G‑1]
ROCF
Return Operational Control Field
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3][911.5‑B‑2][914.0‑M‑1][914.2‑G‑2][915.5‑M‑1]
ROCF
return operations control field
[910.11‑B‑1][910.14‑G‑1]
ROI
Region-Of-Interest
[120.1‑G‑1]
ROM
Read Only Memory
[311.0‑M‑1]
ROS
Remainder Of Segment
[121.0‑B‑2]
ROS
Remote Operations Service
[910.2‑G‑1]
ROS
Remainder-of-Segment
[120.0‑G‑3]
RP
Registration Package
[630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
RPC
Remote Procedure Call
[520.1‑M‑1][521.0‑B‑2][661.0‑B‑1]
RPDU
RAMS PDU
[735.0‑G‑1][735.1‑B‑1]
RRP
Revision Registration Package
[630.0‑B‑1][631.0‑G‑2][632.0‑B‑1]
Rs
Coded symbol rate at input to modulator
[413.0‑G‑2]
RS
Reed-Solomon
[130.1‑G‑2]
RS
Registration Server
[735.0‑G‑1]
RSA
Rivest-Shamir-Adleman
[350.0‑G‑2][350.3‑G‑1][352.0‑B‑1]
RSP
Return Space Packet
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
RSS
Root Sum Square
[401.0‑B‑22][500.1‑G‑1]
RSS
root sum squared
[414.1‑B‑1]
RSVP
Resource Reservation Protocol
[880.0‑G‑1]
RTCP
Real-time Transport Control Protocol
[706.2‑G‑1]
RTLT
Round Trip Light Time
[311.0‑M‑1][500.0‑G‑3]
RTLT
Round-Trip Light Time
[503.0‑B‑1]
RTN
Radial, Transverse (along-track) and Normal
[502.0‑B‑2]
RTN
Radial, Transverse and Normal
[508.0‑B‑1]
Rtn
return link (from satellite to network element)
[415.0‑G‑1]
RTO
Retransmission Time Out
[714.0‑B‑2]
RTOS
Real Time Operating System
[850.0‑G‑1]
RTP
Real-time Transport Protocol
[706.2‑G‑1][880.0‑G‑1]
RTP
Real Time Protocol
[706.1‑G‑1]
RTT
Round Trip Time
[714.0‑B‑2][734.0‑G‑1]
RTTM
Round Trip Time Measurement
[714.0‑B‑2]
RUFT
Return Unframed Telemetry
[A01.2‑Y‑4.1]
RUP-SE
Rational Unified Process – System Engineering
[311.0‑M‑1]
RV
Rover Vehicle
[880.0‑G‑1]
RX
Receive
[211.0‑B‑4]
Rx
Receiver
[506.0‑M‑1]
s
second(s)
s or sec
Second(s)
[401.0‑B‑22]
S/C
spacecraft
[506.0‑M‑1][200.0‑G‑6][320.0‑B‑6][401.0‑B‑22][660.0‑G‑1][740.0‑G‑1]
S/E
Space-to-Earth
[401.0‑B‑22]
s/s
symbols per second
S/W
Software
[311.0‑M‑1]
SAN
Storage Area Network
[706.1‑G‑1]
SANA
Space Assigned Numbers Authority
[121.0‑B‑2][123.0‑B‑1][131.0‑B‑2][131.2‑B‑1][313.0‑Y‑1][320.0‑B‑6][350.6‑G‑1][503.0‑B‑1][505.0‑B‑1][508.0‑B‑1][523.1‑M‑1][702.1‑B‑1][735.1‑B‑1][912.11‑O‑1][A01.2‑Y‑4.1][A02.1‑Y‑3][A20.0‑Y‑3]
SANSA
South African National Space Agency
[Agency List]
SAP
Service Access Point
[130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][133.1‑B‑2][210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][232.0‑B‑2][311.0‑M‑1][702.1‑B‑1][727.0‑B‑4][732.0‑B‑2][734.0‑G‑1][735.0‑G‑1][735.1‑B‑1][850.0‑G‑1][873.0‑M‑1][875.0‑M‑1][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
SAP
service-access-point
[871.0‑M‑1]
SAR
Synthetic Aperture Radar
[880.0‑G‑1]
SASDS
Security Reference Architecture for Space Data Systems
[351.0‑M‑1]
SAW
Surface Acoustic Wave
[880.0‑G‑1][881.0‑M‑1]
SAWG
System Architecture Working Group
[311.0‑M‑1]
SAX
Simple API for XML
[660.0‑B‑1]
SB
Syndrome Binary
[230.1‑G‑2]
SC
Subcommittee
[A31.0‑G‑1]
SC
Spacecraft
[506.1‑B‑1][875.0‑M‑1]
SC
Subcommittee (of ISO)
[311.0‑M‑1]
SCCC
Serially Concatenated Convolutional (Turbo) Code
[131.2‑B‑1]
SCCC
Serially Concatenated Convolutional Codes
[A01.2‑Y‑4.1]
SCCS
Space Communication Cross Support
[910.11‑B‑1][910.14‑G‑1]
SCET
SpaceCraft Event Time
[910.11‑B‑1][910.14‑G‑1]
SCET
Spacecraft Elapsed Time
[872.0‑M‑1]
SCI
Service Control Information
[130.2‑G‑2]
SCID
Spacecraft Identifier
[130.0‑G‑2][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][135.0‑B‑4‑S][210.0‑G‑1][211.0‑B‑4][232.0‑B‑2][320.0‑B‑6][700.0‑G‑3][732.0‑B‑2][734.0‑G‑1][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
SCID
Spacecraft Identification
[910.3‑G‑3]
SCID
Spacecraft ID
[350.6‑G‑1][702.1‑B‑1]
SCLK
Spacecraft Clock
[503.0‑B‑1]
SCM
Simple Component Model
[914.1‑G‑1][914.2‑G‑2]
SCPS
Space Communications Protocol Specification
[311.0‑M‑1][350.0‑G‑2][714.0‑B‑2][850.0‑G‑1][A02.1‑Y‑3]
SCPS
Space Communications Protocol Standards
[130.0‑G‑2][910.0‑G‑2][910.0‑Y‑2]
SCPS-FP
Space Communications Protocol Specification-File Protocol
[135.0‑B‑4][130.0‑G‑2]
SCPS-FP
Space Communications Protocol Standards File Protocol
[130.0‑G‑2]
SCPS-NP
Space Communications Protocol Specification—Network Protocol
[734.0‑G‑1]
SCPS-NP
Space Communications Protocol Standards-Network Protocol
[210.0‑G‑1][211.0‑B‑4]
SCPS-NP
Space Communications Protocol Standards Network Protocol
[130.0‑G‑2]
SCPS-SP
Space Communications Protocol Specification-Security Protocol
[350.0‑G‑2]
SCPS-SP
Space Communications Protocol Standards Security Protocol
[130.0‑G‑2]
SCPS-TP
Space Communications Protocol Specification—Transport Protocol
[714.0‑B‑2]
SCPS-TP
Space Communications Protocol Specifications-Transmission Protocol
[735.0‑G‑1]
SCPS-TP
Space Communications Protocol Standards Transport Protocol
[130.0‑G‑2]
SCS
Source Continuum Set
[735.0‑G‑1]
SCTP
Stream Control Transmission Protocol
[880.0‑G‑1][A01.2‑Y‑4.1]
SD
Standard Definition
[706.1‑G‑1]
SD-SDI
Serial Digital Interface
[706.1‑G‑1]
SDB
Source Database
[660.0‑G‑1]
SDI
Serial Digital Interface
[706.1‑G‑1]
SDIS
Standard Data Interchange Structures
[610.0‑G‑5]
SDL
Specification and Description Language
[727.0‑B‑4]
SDLC
System Development Life Cycle
[350.4‑G‑1]
SDLP
Space Data Link Protocol
[130.2‑G‑2][133.1‑B‑2][702.1‑B‑1]
SDLP_Channel
Space Data Link Protocol Channel
[702.1‑B‑1]
SDM
Space Division Multiplexing
[880.0‑G‑1]
SDMA
Space Division Multiple Access
[880.0‑G‑1]
SDNV
Self-Delimiting Numerical Value
[734.0‑G‑1]
SDP
Session Description Protocol
[706.2‑G‑1]
SDTF
Space Domain Task Force
[660.0‑G‑1]
SDTV
Standard Definition Television
[706.1‑G‑1]
SDU
Service Data Unit
[120.0‑G‑3][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][210.0‑G‑1][211.0‑B‑4][211.1‑B‑3][211.2‑B‑1][232.0‑B‑2][520.1‑M‑1][700.0‑G‑3][702.1‑B‑1][727.0‑B‑4][732.0‑B‑2][734.0‑G‑1][735.0‑G‑1][735.1‑B‑1][740.0‑G‑1][850.0‑G‑1][851.0‑M‑1][910.11‑B‑1][910.14‑G‑1][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
SE
Space Element
[910.4‑B‑2]
SEA
Systems Engineering Area
[500.1‑G‑1][506.1‑B‑1][A02.1‑Y‑3]
SEC
Single Error Correction
[230.1‑G‑2]
SECAM
Séquentiel Couleur à Mémoire
[706.1‑G‑1]
SECOPS
Security Operating Procedures
[351.0‑M‑1]
SecWG
CCSDS Security Working Group
[350.3‑G‑1]
SEDR
Specific Energy Dissipation Rate
[508.0‑B‑1]
SEG
segment
[200.0‑G‑6]
SEP
Sun-Earth-Probe [angle]
[401.0‑B‑22]
SEP
Sun-Earth-probe
[500.1‑G‑1]
seq
Sequential
[401.0‑B‑22]
SER
Symbol Error Rate
[415.0‑G‑1]
SFCG
Space Frequency Coordination Group
[401.0‑B‑22][413.0‑G‑2][415.1‑B‑1][500.1‑G‑1]
SFDU
Standard Formatted Data Unit
[401.0‑B‑22][610.0‑G‑5][620.0‑B‑2][621.0‑G‑1][622.0‑B‑1][630.0‑B‑1][631.0‑G‑2][632.0‑B‑1][641.0‑B‑2][641.0‑G‑2][643.0‑B‑1][645.0‑G‑1][647.1‑B‑1][647.2‑B‑1][647.3‑B‑1][661.0‑B‑1]
SFO
Store-and-Forward Overlay
[734.0‑G‑1][740.0‑G‑1]
SFO
Store and Forward Overlay
[720.3‑G‑1]
SFTP
Secure File Transfer Protocol
[503.0‑B‑1][506.1‑B‑1]
SGML
Standard Generalized Markup Language
[312.0‑G‑1][651.0‑M‑1]
SGP4
US Air Force Simplified General Perturbations No. 4
[502.0‑B‑2]
SGS
Source Gateway Set
[735.0‑G‑1]
SHA
Secure Hash Algorithm
[350.0‑G‑2][350.3‑G‑1][350.8‑G‑1][352.0‑B‑1][914.0‑M‑1]
SHF
Secure Hash Function
[914.1‑G‑1]
SHS
Secure Hash Standard
[350.3‑G‑1]
SI
International System of Units
[301.0‑B‑4][500.0‑G‑3][508.0‑B‑1][A20.0‑Y‑3]
SI
Service Instance
[914.0‑M‑1][915.1‑M‑1][915.2‑M‑1][916.1‑M‑1][916.3‑M‑1]
SI
single-interrogator
[881.0‑M‑1]
SIG
Special Interest Group
[A02.1‑Y‑3]
SIG or sig
Signal
[401.0‑B‑22]
SII
Service Instance Identifier
[914.0‑M‑1]
Sim
Simultaneous
[401.0‑B‑22]
SIM
Spacecraft Simulator
[660.0‑G‑1]
SIMO
Single-Input, Multiple-Output
[880.0‑G‑1]
SIP
Submission Information Package
[312.0‑G‑1][650.0‑M‑2][651.0‑M‑1][651.1‑B‑1][652.0‑M‑1][661.0‑B‑1][A01.2‑Y‑4.1]
SIPv2
Session Initiation Protocol version 2
[706.2‑G‑1]
SIR
Signal-to-Interference ratio
[880.0‑G‑1]
SIS
Space Internetworking Services
[520.0‑G‑3][735.0‑G‑1][880.0‑G‑1][A02.1‑Y‑3]
SIS
Space Internet Services
[851.0‑M‑1]
SISG
Space Internetworking Strategy Working Group
[734.0‑G‑1]
SISO
Single-input, single-output
[880.0‑G‑1]
SKI
Secret (Symmetric) Key Infrastructure
[350.8‑G‑1]
SKI
Secret Key Infrastructure
[350.6‑G‑1]
SKI
Symmetric Key Infracture
[350.6‑G‑1]
SL
Space Link
[910.4‑B‑2]
SL-DU
Space Link Data Unit
[911.1‑B‑3][911.1‑B‑3][911.2‑B‑2][911.2‑B‑2][911.5‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][914.1‑G‑1]
SLAP
Space Link Automated Request for Transmission Procedure
[732.0‑B‑2]
SLAP
Space Link ARQ Procedure
[700.0‑G‑3]
SLAP_PDU
SLAP Protocol Data Unit
[700.0‑G‑3]
SLDU
Space Link Data Unit
[914.2‑G‑2][916.3‑M‑1]
SLE
Space Link Extension
[130.0‑G‑2][130.2‑G‑2][311.0‑M‑1][312.0‑G‑1][350.0‑G‑2][350.4‑G‑1][350.6‑G‑1][506.0‑M‑1][520.0‑G‑3][734.0‑G‑1][740.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.2‑G‑1][910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][913.1‑B‑1][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][915.5‑M‑1][916.1‑M‑1][916.3‑M‑1][A01.2‑Y‑4.1]
SLE-FG
Space Link Extension Functional Group
[910.3‑G‑3]
SLE-FG
SLE Functional Group
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
SLE-FTDU
SLE Forward Transfer Data Unit (EFCLTU SDU)
[912.11‑O‑1]
SLE-PDU
SLE Protocol Data Unit
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
SLE-SDU
SLE Service Data Unit
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
SL-PDU
Space Link Protocol Data Unit\
[912.11‑O‑1]
SLR
Satellite Laser Ranging
[503.0‑B‑1]
SLS
Space Link Services
[506.0‑M‑1][520.0‑G‑3][880.0‑G‑1][A02.1‑Y‑3]
SLS
Space Link Session
[910.11‑B‑1][910.14‑G‑1]
SLS
Space Link Subnet
[350.0‑G‑2]
SM
Service Management
[312.0‑G‑1][910.11‑B‑1][910.14‑G‑1]
SM&C
Spacecraft Monitoring and Control
[520.0‑G‑3][660.0‑G‑1][735.0‑G‑1][735.1‑B‑1][A01.2‑Y‑4.1]
SM&C
CCSDS Spacecraft Monitor & Control
[520.1‑M‑1][521.0‑B‑2][523.1‑M‑1]
SMAE
Systems Management Application Entity
[910.2‑G‑1]
SMCP
System Monitor and Control Protocol
[735.0‑G‑1]
SMEX
Small Explorer
[120.0‑G‑3]
SMPTE
Society of Motion Picture and Television Engineers
[706.1‑G‑1]
SMTP
Simple Mail Transport Protocol
[910.14‑G‑1]
SN
Space Network
[415.1‑B‑1][700.0‑G‑3]
SN
Space Network (NASA’s TDRSS)
[415.0‑G‑1]
SNA
System Network Architecture
[610.0‑G‑5]
SNIP
Space Network Interoperability Panel
[415.1‑B‑1][A01.2‑Y‑4.1]
SNIP
Space Network Interoperable Panel
[415.0‑G‑1]
SNMP
Simple Network Management Protocol
[706.2‑G‑1][714.0‑B‑2][734.0‑G‑1]
SNR
Signal-to-Noise Ratio
[401.0‑B‑22][414.1‑B‑1][500.1‑G‑1]
SNR, S/N
Signal-to-Noise ratio
[880.0‑G‑1]
SNR
Signal to Noise Ratio
[130.1‑G‑2][415.0‑G‑1]
SOA
Service Oriented Architecture
[311.0‑M‑1][520.0‑G‑3][910.14‑G‑1]
SOA
service-oriented architecture
[312.0‑G‑1]
SOAP
Simple Object Access Protocol
[520.0‑G‑3][910.11‑B‑1][910.14‑G‑1]
SOAP
Service Oriented Architecture Protocol
[661.0‑B‑1]
SOD
Second Of the Day
[506.1‑B‑1]
SOIS
Spacecraft Onboard Information Services
[735.0‑G‑1][735.1‑B‑1]
SOIS
Spacecraft Onboard Interface Services
[850.0‑G‑1][851.0‑M‑1][852.0‑M‑1][853.0‑M‑1][854.0‑M‑1][855.0‑M‑1][871.0‑M‑1][871.1‑M‑1][872.0‑M‑1][873.0‑M‑1][875.0‑M‑1][880.0‑G‑1][A02.1‑Y‑3]
SOIS
Spacecraft On-board Interface Services
[520.0‑G‑3]
SoS
System of Systems
[311.0‑M‑1]
SOS
Silicon-On-Sapphire
[350.1‑G‑1]
SP
Service Package
[910.14‑G‑1]
SP
Security Protocol
[350.0‑G‑2]
SPASE
Space Physics Archive Search and Exchange
[312.0‑G‑1]
SPDF
Source Packet Data Field
[120.0‑G‑3]
SPDU
Supervisory Protocol Data Unit
[211.0‑B‑4][211.2‑B‑1][211.1‑B‑3]
SPIHT
Set Partitioning In Hierarchical Trees
[120.1‑G‑1]
SPK
Satellite, Planetary Kernel
[502.0‑B‑2]
SPP
Space Packet Protocol
[734.0‑G‑1]
SPP
System Security Policy
[350.0‑G‑2]
sps or s/s
Symbols Per Second
[401.0‑B‑22]
SPTS
Single-Program Transport Stream
[706.1‑G‑1]
SQPN
Staggered Quadrature phase shift keyed PN modulation. Also called Staggered QPSK (SQPSK) with PN spreading or Offset QPSK (OQPSK) with PN spreading
[415.1‑B‑1]
SQPN
staggered quadrature pseudo-random noise (PN spread SQPSK)
[415.0‑G‑1]
SR
Syndrome Register
[230.1‑G‑2]
SRP
Solar Radiation Pressure
[508.0‑B‑1]
SRRC
Square Root Raised Cosine
[413.0‑G‑2]
SRS
Space Research Service
[413.0‑G‑2]
SRV
Service
[914.0‑M‑1]
SS
Suspend_State
[232.1‑B‑2]
SS
Spread Spectrum
[415.1‑B‑1]
SS
Subscriber Station
[880.0‑G‑1]
SSC
Swedish Space Corporation
[401.0‑B‑22][Agency List]
SSG
SANA Steering Group
[313.0‑Y‑1][A02.1‑Y‑3]
SSH
Secure Shell
[351.0‑M‑1][352.0‑B‑1]
SSL
Secure Sockets Layer
[350.0‑G‑2][351.0‑M‑1][352.0‑B‑1]
SSMM
Solid State Mass Memory
[873.0‑M‑1]
SSNR
Symbol SNR
[130.1‑G‑2]
SSO
Swiss Space Office
[Agency List]
SSP
System Security Procedure
[351.0‑M‑1]
SSPA
Solid State Power Amplifier
[413.0‑G‑2]
SSR
Solid State Recorder
[740.0‑G‑1]
SSTI
Small Satellite Technology Infusion
[120.0‑G‑3]
ST
Station Time
[506.1‑B‑1]
ST SEQ
start sequence
[200.0‑G‑6]
STA
Station
[401.0‑B‑22]
STAB
Stability
[401.0‑B‑22]
STD
Standard
[714.0‑B‑2]
STRV
Space Technology Research Vehicle
[350.0‑G‑2]
STS
Space Transport System
[706.2‑G‑1]
STS
Supplementary Transport Service
[735.0‑G‑1][735.1‑B‑1]
SUBCARR
Subcarrier
[401.0‑B‑22]
SUPARCO
Space and Upper Atmosphere Research Commission
[Agency List]
SV
System View (of DoDAF)
[311.0‑M‑1]
SVC
Switched Virtual Circuit
[706.2‑G‑1]
SWAS
Submillimeter Wave Astronomy Satellite
[120.0‑G‑3]
SWIR
Short-Wave-Infra-Red
[120.0‑G‑3]
SWS
Silly Window Syndrome
[714.0‑B‑2]
SXT
Soft X-Ray Telescope
SYM or sym
Symbol
[401.0‑B‑22]
SYN
Synchronization
[714.0‑B‑2]
SYNCSAP
synchronisation service access point
[853.0‑M‑1]
SYND
Syndrome value
[230.1‑G‑2]
SYSCON
System Controller (application)
[875.0‑M‑1]
SysML
System Modeling Language
[311.0‑M‑1]
T&C
Telemetry and Command
[660.0‑G‑1]
T-field
Time Field
[301.0‑B‑4]
T-P
Transfer Provider port
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
T-P
Transfer Provider Service Port
[912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
T-SDU
Transport-Service Data Unit.
T-U
Transfer User port
[911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
TAI
International Atomic Time
[301.0‑B‑4][500.0‑G‑3][502.0‑B‑2][504.0‑B‑1][660.1‑G‑1]
T1_Initial
The initial value to which the countdown Timer is set
[232.1‑B‑2]
T4B
weighted-voting balanced Tausworthe, voting ν=4
[414.0‑G‑1]
T2B
weighted-voting balanced Tausworthe, voting ν=2
[414.0‑G‑1]
TAK
Traffic Authentication Key
[350.6‑G‑1]
TAS
Time Access Service
[850.0‑G‑1]
TASAP
Time Access Service Access Point
[872.0‑M‑1]
Tb
Bit period
[413.0‑G‑2]
TB
Terabyte
[651.1‑B‑1]
TBC
To Be Confirmed
[740.0‑G‑1]
TBD
To Be Determined
[401.0‑B‑22]
TC
chip duration
[414.1‑B‑1]
TC
Telecommand
[130.0‑G‑2][130.2‑G‑2][131.0‑B‑2][131.2‑B‑1][132.0‑B‑1][133.0‑B‑1][200.0‑G‑6][230.1‑G‑2][231.0‑B‑2][232.0‑B‑2][232.1‑B‑2][311.0‑M‑1][320.0‑B‑6][350.0‑G‑2][414.0‑G‑1][520.0‑G‑3][660.0‑G‑1][700.0‑G‑3][702.1‑B‑1][727.0‑B‑4][732.0‑B‑2][734.0‑G‑1][740.0‑G‑1][875.0‑M‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][910.4‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
TC VCA
Telecommand Virtual Channel Access service
[912.3‑B‑2]
TC/TM
Telemetry/Telecommand
[734.0‑G‑1]
TCA
Time of Closest Approach
[508.0‑B‑1]
TCB
Barycentric Coordinated Time
[500.0‑G‑3][502.0‑B‑2][504.0‑B‑1]
TCD
Temperature Coefficient of Delay
[880.0‑G‑1]
TCG
Geocentric Coordinate Time
[502.0‑B‑2]
TChS
Channel symbol period
[413.0‑G‑2]
TCM
Trellis Coded Modulation
[131.0‑B‑2][131.4‑M‑1][413.0‑G‑2]
TCM
Terminology, Conventions, and Methodology
[910.2‑G‑1][910.4‑B‑2][912.3‑B‑2]
TCM
Terminology, Conventions and Methodology
[912.11‑O‑1][912.1‑B‑3]
TCP
Transmission Control Protocol
[130.0‑G‑2][714.0‑B‑2][720.1‑G‑3][727.0‑B‑4][850.0‑G‑1][880.0‑G‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.2‑G‑1][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2][912.11‑O‑1][912.1‑B‑3][912.3‑B‑2][913.1‑B‑1][914.1‑G‑1]
TCP
Time Correlation Packet
[211.0‑B‑4]
TCP
Transport Control Protocol
[734.0‑G‑1]
TCP/IP
Transmission Control Protocol/Internet Protocol
[735.0‑G‑1]
TCX
Transform Coded eXcitation
[706.2‑G‑1]
TCXO
Temperature Compensated Crystal Oscillator
[415.0‑G‑1][415.1‑B‑1]
TDAC
Time Domain Aliasing Cancellation
[706.2‑G‑1]
TDB
Barycentric Dynamical Time
[500.0‑G‑3][502.0‑B‑2][504.0‑B‑1]
TDD
Time Division Duplex
[880.0‑G‑1]
TDEA
Triple Data Encryption Algorithm
[350.3‑G‑1]
TDM
Time Division Multiplexing
[130.0‑G‑2][660.0‑G‑1][706.2‑G‑1][880.0‑G‑1]
TDM
Tracking Data Message
[503.0‑B‑1][504.0‑B‑1][505.0‑B‑1][506.0‑M‑1][A01.2‑Y‑4.1]
TDM
Time Division Multiplexed
[660.0‑B‑1]
tdm
Tracking Data Message tag
[505.0‑B‑1]
TDMA
Time Division Multiple Access
[880.0‑G‑1]
TDMoIP
TDM over IP
[706.2‑G‑1]
TDR
True of Date Rotating
[502.0‑B‑2]
TDR
Trustworthy Digital Repository
[652.1‑M‑1]
TDRS
Tracking and Data Relay Satellite
[706.1‑G‑1][706.2‑G‑1]
TDRSS
Tracking and Data Relay Satellite System
[401.0‑B‑22][415.0‑G‑1][700.0‑G‑3]
TDSU
Transport Service Data Unit
[875.0‑M‑1]
TDT
Terrestrial Dynamical Time
[301.0‑B‑4][500.0‑G‑3]
TDT
Terrestrial Dynamical Time (see also ‘TT’)
[502.0‑B‑2]
TEA
Tiny Encryption Algorithm
[350.2‑G‑1]
TEC
Total Electron Count
[503.0‑B‑1]
TECU
Total Electron Count Units
[503.0‑B‑1]
TED
Triple Error Detection
[230.1‑G‑2]
TEI
Text Encoding Initiative
[651.0‑M‑1][652.0‑M‑1]
TED
Triple Error Detection
[230.1‑G‑2]
TEK
Traffic Encryption Key
[350.6‑G‑1][350.8‑G‑1]
TEME
True Equator Mean Equinox
[502.0‑B‑2]
TEME
True Equator, Mean Equinox
[500.0‑G‑3]
TFVN
Transfer Frame Version Number
[130.0‑G‑2][130.2‑G‑2][132.0‑B‑1][133.0‑B‑1][232.0‑B‑2][702.1‑B‑1][732.0‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
THR
Thrust
[508.0‑B‑1]
TJD
Truncated Julian Date
[301.0‑B‑4]
TJD
truncated Julian day
[301.0‑B‑4]
TKSC
Tsukuba Space Center
[706.1‑G‑1]
TLE
Two Line Element
[502.0‑B‑2]
TLI
Transport Layer Interface
[913.1‑B‑1]
Tlm
Telemetry
[401.0‑B‑22]
TLM
Telemetry
[200.0‑G‑6][320.0‑B‑6][740.0‑G‑1]
TLS
Transport Layer Security
[350.0‑G‑2][351.0‑M‑1][352.0‑B‑1]
TLV
Type-Length-Value
[610.0‑G‑5][727.0‑B‑4]
TM
Thematic Mapper
[120.0‑G‑3]
TM
Telemetry
[130.0‑G‑2][130.1‑G‑2][130.2‑G‑2][131.0‑B‑2][131.2‑B‑1][132.0‑B‑1][230.1‑G‑2][350.0‑G‑2][414.0‑G‑1][520.0‑G‑3][702.1‑B‑1][720.1‑G‑3][727.0‑B‑4][734.0‑G‑1][740.0‑G‑1][875.0‑M‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][910.3‑G‑3][910.4‑B‑2][911.1‑B‑3][911.2‑B‑2][911.5‑B‑2]
TM
Telemetric
[660.0‑G‑1]
TM/TC
Telemetric and Telecommand
[660.0‑B‑1]
TML
Transport Mapping Layer
[913.1‑B‑1][914.1‑G‑1]
TMS
TML Startup (Timer)
[913.1‑B‑1]
TOD
True Of Date
[500.0‑G‑3]
TOD
True Equator and Equinox of Date
[502.0‑B‑2][504.0‑B‑1]
TOGAF
The Open Group Architecture Framework
[311.0‑M‑1][A02.1‑Y‑3]
TOTD
Transfer Object Type Descriptor
[651.1‑B‑1]
TP
Trajectory Prediction
[910.14‑G‑1]
TP
Transport Protocol
[350.0‑G‑2][A02.1‑Y‑3]
TP-ID
Transport Protocol Identifier
[714.0‑B‑2][135.0‑B‑4‑S]
TPC
Transmit Power Control
[880.0‑G‑1]
TPK
Traffic Protection Key
[350.6‑G‑1]
Trans or Tr
Transmit
[401.0‑B‑22]
TRANSEC
transmission security
[350.0‑G‑2][351.0‑M‑1]
Ts
Coded symbol period at input to modulator
[413.0‑G‑2]
TS
Transport Stream
[706.1‑G‑1]
TS
Transport Service
[735.0‑G‑1][875.0‑M‑1]
TSAP
test service access point
[855.0‑M‑1]
TSMP
Time Synchronized Mesh Protocol
[880.0‑G‑1]
TsNIIMash
Central Research Institute of Machine Building
[Agency List]
TSP
Transport Service Provider
[714.0‑B‑2]
TSU
Transport Service User
[714.0‑B‑2]
TT
Timeout_Type
[232.1‑B‑2]
TT
Terrestrial Time
[301.0‑B‑4][500.0‑G‑3]
TT
Terrestrial Dynamical Time (see also ‘TDT’)
[502.0‑B‑2]
TT
Terrestrial Dynamical Time
[504.0‑B‑1]
TT&C
Tracking, Telemetry, and Command
[350.1‑G‑1][910.11‑B‑1][910.14‑G‑1]
TT&C
Telemetry, Tracking and Command
[910.0‑G‑2][910.0‑Y‑2][910.3‑G‑3]
TT&C
Telemetry, Tracking, and Control
[351.0‑M‑1]
TTC
Tracking, Telemetry, and Command
[401.0‑B‑22]
TTL
Time To Live
[714.0‑B‑2]
T-U
Transfer User Service Port
[912.11‑O‑1][912.1‑B‑3][912.3‑B‑2]
TUBITAK
Scientific and Technological Research Council of Turkey
[Agency List]
TV
Technical View (of DoDAF)
[311.0‑M‑1]
TVN
Transverse, Velocity and Normal
[508.0‑B‑1]
TWTA
Traveling Wave Tube Amplifier
[413.0‑G‑2]
TX
Transmit
[211.0‑B‑4]
U-frame
User Data Frame
[211.0‑B‑4]
UCS
Universal Character Set
[660.0‑B‑1]
UDD
User Defined Data
[740.0‑G‑1]
UDDI
Universal Description Discovery and Integration
[312.0‑G‑1]
UDP
User Datagram Protocol
[130.0‑G‑2][706.1‑G‑1][714.0‑B‑2][727.0‑B‑4][734.0‑G‑1][735.0‑G‑1][850.0‑G‑1][880.0‑G‑1]
U-frame
User Data Format
[210.0‑G‑1]
U-frame
User data/information frames
[211.1‑B‑3]
UHF
Ultra High Frequency
[210.0‑G‑1][211.0‑B‑4][706.2‑G‑1]
UKSA
United Kingdom Space Agency
UM
Utilization Management
[910.11‑B‑1][910.14‑G‑1][910.3‑G‑3]
UM
SLE Utilization Management
[910.4‑B‑2]
UMAC
Universal Message Authentication Code
[350.3‑G‑1]
UML
Unified Modeling Language
[311.0‑M‑1][312.0‑G‑1][520.0‑G‑3][650.0‑M‑2][651.0‑M‑1][652.0‑M‑1][660.1‑G‑1][661.0‑B‑1][910.0‑G‑2][910.0‑Y‑2][910.11‑B‑1][910.14‑G‑1][913.1‑B‑1][914.0‑M‑1][914.1‑G‑1][914.2‑G‑2][915.1‑M‑1][915.2‑M‑1][915.5‑M‑1][916.1‑M‑1][916.3‑M‑1]
UNICODE
Universal Code
[650.0‑M‑2]
UNII
Unlicensed National Information Infrastructure
[880.0‑G‑1]
UPC
Universal Product Code
[880.0‑G‑1]
UPMS
UML Profile and Metamodel for Services
[311.0‑M‑1]
UQPSK
Unbalanced QPSK
[415.1‑B‑1]
UQPSK
unbalanced quaternary/quadrature/quadra phase shift key
[910.11‑B‑1][910.14‑G‑1]
URI
Uniform Resource Identifier
[523.1‑M‑1][661.0‑B‑1][734.0‑G‑1]
URI
Universal Resource Identifier
[520.1‑M‑1][521.0‑B‑2]
URL
Uniform Resource Locator
[523.1‑M‑1][661.0‑B‑1][910.11‑B‑1][910.14‑G‑1][910.14‑G‑1]
URL
Universal Resource Locator
[A01.2‑Y‑4.1][651.1‑B‑1]
URN
Uniform Resource Name
[312.0‑G‑1][661.0‑B‑1]
URN
Universal Resource Name
[A01.2‑Y‑4.1]
USAF
United States Air Force
[500.0‑G‑3]
USB
Universal Serial Bus
[706.1‑G‑1]
USB
upper sideband
[500.1‑G‑1]
USCCS
User Spacecraft Clock Calibration System
[415.1‑B‑1]
USM
Universal Semianalytical Method
[502.0‑B‑2]
USGS
United States Geological Survey
[Agency List]
USOC
User Support Center
[706.1‑G‑1]
UT
Unive