List of abbreviations
AIT - Assembly Integration and Testing
AOS - Advanced Orbiting Systems
API - Application Programming Interface
ARQ - automatic repeat request (for retransmission, in a protocol)
AU - Authentication Unit
BCH - Bose-Chaudhuri-Hocquenghem (error correction code)
BIF - Built-In-Failure
CADU - Channel Access Data Unit
CCSDS - Consultative Committee for Space Data Systems
CFDP - CCSDS File Delivery Protocol
CLCW - Communications Link Control Word (was Command Link Control Word)
CLTU - Communications Link Transmission Unit (was Command Link Transmission Unit)
COP - Communications Operation Procedure (was Command Operation Procedure)
COPM - COP management (service)
COTS - commercial off-the-shelf (product)
CPN - CCSDS Principal Network
CRC - cyclic redundancy check (error detection code)
CVCDU - Coded Virtual Channel Data Unit
ECSS - European Cooperation for Space Standardization
EGSE - Electrical Ground Support Equipment
ESA - European Space Agency
FARM - Frame Acceptance and Reporting Mechanism
FIFO - first in, first out (queue)
FOP - Frame Operation Procedure
FSH - Frame Secondary Header
ID - identifier
IP - Internet Protocol (as in IPv4 and IPv6)
JPL - Jet Propulsion Laboratory
LAC - Logical Authentication Channel
MAP - Multiplexer Access Point
MAPA - MAP Access (service)
MAPP - MAP Packet (service)
MAP-SDU - MAP Access Service Data Unit
MCF - Master Channel Frame (service)
MC-FSH - Master Channel Frame Secondary Header
MC-OCF - Master Channel Operational Control Field
OCF - Operational Control Field
PSS - (reference for ESA standards)
PVN - Packet Version Number
SANA - Space Assigned Numbers Authority
SCID - spacecraft identifier
SDLS - Space Data Link Security
SDU - Service Data Unit
SLAP - Space Link ARQ Procedure
SLS - Space Link Subnetwork
SLSI - Segment Level Security Interface
TC - telecommand
TCP - Transmission Control Protocol (as in TCP/IP)
TM - telemetry
TTC - telemetry, tracking and command (or commanding or control)
UDP - User Datagram Protocol
VC - Virtual Channel
VCA - Virtual Channel Access (service)
VCA-SDU - Virtual Channel Access Service Data Unit
VCDU - Virtual Channel Data Unit
VCF - Virtual Channel Frame (service)
VC-FSH - Virtual Channel Frame Secondary Header
VCID - Virtual Channel identifier
VC-OCF - Virtual Channel Operational Control Field
VCP - Virtual Channel Packet (service)