Signaling Innovation

We're on the forefront of rapidly evolving technology.

GPS Acronyms

1PPS One Pulse Per Second
2-D or 2D Two Dimensional
3-D or 3D Three Dimensional
AC Alternating Current
A/D Analog-to-Digital
ADC Analog-to-Digital Converter
ADR Accumulated Doppler Range
ADR Accumulated Delta Range
AGC Automatic Gain Control
AK Authentication Key
AL Alarm Limit
AltBOC Alternate Binary Offset Carrier
AMSAT American Satellite
APC Aircraft Power Conditioner
ARNS Aeronautical Radio Navigation Services
ARP Antenna Reference Point
AS Anti-Spoofing
ASCII American Standard Code for Information Interchange
ASIC Application Specific Integrated Circuits
AVL Automated Vehicle Locations
BCD Binary Code Decimal
BDE Borland Database Engine
BDS Black Diamond System
BFS Broadband Fiber Source
BIH Bureau l'International de l'Heure
BIST Built-In Self-Test
BIT Built-In Test
BNR Binary Numerical Representation
BOC Binary Offset Carrier
BPS Bits per Second
BPSK Bi-Phase Shift Key
BSG Baseband Signal Generator
BTS Conventional Terrestrial System (BIH defined)
BW Bandwidth
C/A Code Coarse/Acquisition Code
CAN Controller Area Network
CASM Coherent Adaptive Subcarrier Modulation
CBIT Continuous Built In Test
Cc Cubic Centimeters
CCITT Command, Control, and Intelligence Technical Test
CD Clock Drift
CD Compact Disc
Cd Change Directory
CDGPS Canada-Wide Differential Global Positioning System
CDMA Code Division Multiple Access
CDPD Cellular Digital Packet Data
CDU Control and Display Unit
CE Conformité Européenna
CEP Circular Error Probable
CF Compact Flash
CFGP Configuration Parameters
CISPR International Special Committee On Radio Interference
CKSC Clock/Status Card
CL Long Code
CLK System Clock
CM Moderate Length Code
CMG Course Made Good
CMP Comparator Message Processor
CMR Compact Measurement Record
C/No Post Correlation Carrier to Noise Ratio in dB-Hz
CoCom Coordinating Committee on Multilateral Export Controls
COG Course Over Ground
COGO Coordinate Geometry
COSPAS Cosmitscheskaja Sistema Poiska Awarinitsch Sudow (Russian: space system for search of vessels in distress)
CPLD Complex Programmable Logic Device
CPU Central Processing Unit
CR Carriage Return
CRC Cyclic Redundancy Check
CRR Common Reference Receiver
CS Commercial Service
CSIC Coordination Scientific Information Center
CSA Canada Shipping Act
CTP Conventional Terrestrial Pole
CTS Clear To Send
CTS Conventional Terrestrial System or Clear To Send
CW Continuous Wave
dB Decibel
dBm Decibel Relative to 1 milliWatt
DC Direct Current
DCD Data Carrier Detected
DCE Data Communications Equipment (Modem)
DCO Digitally Controlled Oscillator
DDS Direct Digitial Sampling
DGNSS Differential Global Navigation Satellite System
DGPS Differential Global Positioning System
DHCP Dynamic Host Configuration Protocol
DL Data Logger
DLL Delay Lock Loop
DoD Department of Defence (U.S.)
DOP Dilution Of Precision
DPB Digital Pulse Blanking
DR Dead Reckoning
DRAM Dynamic Random Access Memory
DRMS Distance Root Mean Square
DSP Digital Signal Processor
DSR Data Set Ready
DTE Data Terminal Equipment
DTR Data Terminal Ready
D/U Desired/Undesired
E Eccentricity
E-L Early to Late
ECEF Earth-Centred-Earth-Fixed
EDM Electronic Distance Measuring (instrument)
EEPROM Electrically Erasable Programmable Read Only Memory
EGNOS European Geo-Stationary Navigation System
EMC Electromagnetic Compatibility
EMI Electromagnetic Immunity
EP Engineering Practice
ESA European Space Agency
ESD Electrostatic Discharge
ESN Electronic Serial Number
FAA Federal Aviation Administration (FAA)
FCC Federal Communication Commission
FDA Frequency Distribution Amplifier
FDMA Frequency Division Multiple Access
FEC Forward Error Correction
FEPROM Flash Erasable Programmable Read Only Memory
FIFO First In, First Out
FKP Flachen Korrectur Parameter (Plane Correction Parameter) German
FLL Frequency Lock Loop
FMEA Failure Mode Effects Analysis
FOC Full Operational Capability
FOG Fibre Optic Gyro
FOM Figure of Merit
FPGA Field-Programmable Gate Array
FR Factory Reset
FTP File Transfer Protocol
FTS Frequency and Time Standard
FW Firmware
GAGAN GPS Aided GEO Augmented Navigation (India)
GaIn Galileo Industries
GCC Galileo Control Centre
GDOP Geometric Dilution Of Precision
GEO Geostationary Satellite
GIC GPS Integrity Channel
GL GLONASS (NMEA talker ID)
GLONASS Global Navigation Satellite System
GM Gauss-Markov
GMS Ground Mission Segment
GMT Greenwich Mean Time
GN Combined GPS and GLONASS (NMEA talker ID)
GND Ground
GNSS Global Navigation Satellite System
G.P. Ground Plane
GP GPS (NMEA talker ID)
GPAI General Purpose Analog Input
GPS Global Positioning System
GRC Galileo Reception Chain
GRCN Galileo Reception Chain Non-PRS
GSS Galileo Sensor Stations
GSTB Galileo System Test Bed
GTR Galileo Test Receiver
GTS Galileo Test Signal Generator
GUI Graphical User Interface
GUS Ground Uplink Station
GUST WAAS GUS-Type 1
GUSTR WAAS GUS-Type 1 Receiver
HDOP Horizontal Dilution Of Precision
Hex Hexadecimal
HFOM Horizontal Figure of Merit
HMAC Hashed Message Authentication Code
HP High Performance (standard OmniSTAR service)
HTDOP Horizontal position and Time Dilution Of Precision
Hz Hertz
I and Q In-Phase and Quadrature (Channels)
I Channel In-phase data channel
IBIT Initiated Built In Test
IC Integrated Circuit
ICAO International Civil Aviation Organization
ICD Interface Control Document
ICP Integrated Carrier Phase
ID Identification
IEC International Electrotechnical Commission
IEEE Institute of Electrical & Electronics Engineers
IERS International Earth Rotation Service
IF Intermediate Frequency
IGP Ionospheric Grid Point
IGRF International Geometric Reference Field
IGS CB International GPS Service Central Bureau
IM Intermodulation
IMLA Integrated Multipath Limiting Antenna
IMO International Maritime Organization
IMU Inertial Measuring Unit
INH Inhibit
INS Inertial Navigation System
I/O Input/Output
IODE Issue of Data (Ephemeris)
IOV In-Orbit Validation
IP Internet Protocol
IRQ Interrupt Request
ISG IF Signal Generator
ISO International Standards Organization
ITRF International Terrestrial Reference System
JPL Jet Propulsion Laboratory (NASA)
JTAG Joint Test Action Group
KPA Klystron Power Amplifier
Kb Kilobit
KB Kilobyte
KMF Key Management Facility
L1 The 1575.42 MHz GPS carrier frequency including C/A and P-Code
L2 The 1227.60 MHz secondary GPS carrier frequency (P-Code only)
L2C The L2 civilian code transmitted at the L2 frequency (1227.6 MHz)
L5 3rd civil GPS frequency that tracks at low signal-to-noise ratios (1176.45 MHz)
LAAS Local Area Augmentation System
LCD Liquid Crystal Display
LED Light-Emitting Diode
LF Line Feed
LGF LAAS Ground Facility
LHCP Left Hand Circular Polarization
LME Line Maintenance Equipment
LNA Low Noise Amplifier
LO Local Oscillator
LRU Line Replacement Unit
LSB Least significant bit
LVTTL Low Voltage Transistor Transistor Logic
MAC Media Access Control (Ethernet)
MAT Multipath Assessment Tool
Mb Megabit
MB Megabyte
MEDLL® Multipath Estimation Delay Lock Loop
MEO Medium Earth Orbit
MET Multipath Elimination Technology
MET Meteorological
MGRS Military Grid Reference Systems
MHz MegaHertz
MIB Management Information Base
MIL Military
MINOS Multiple Independent NOmadic Stargazer
MKI Mark Input
MKMF Mission Key Management Facility
MMCX Multimedia Communications Exchange (Lucent)
MMT Multipath Mitigation Technology
MOPS Minimum Operational Performance Standard
MP Messag Processor
MPC Modulated Precision Clock
MPM Multipath Meter
Ms Millisecond
MSAS MTSAT Satellite Based Augmentation System
MSAT Mobile Satellite
MSB Most significant bit
MSL Mean sea level
MSR Measure Output
MTBF Mean Time Between Failures
MTSAT Multi-Functional Transport Satellite
N/A Not Applicable
NAS National Airspace System (United States)
NASA National Aeronautics and Space Administration (U.S.)
NTS National Topographic Series (Canada)
NAV RINEX Ephemeris File
NAVSTAR NAVigation Satellite Timing And Ranging (synonymous with GPS)
N/C or NC Not Connected
NCC Network Control Center
NCO Numerically Controlled Oscillator
ND Navigation Data
NH Neumann-Hoffman
NMEA National Marine Electronics Association
N. mi. Nautical mile
NOC Network Operations Center
ns Nanosecond
NVM Non-Volatile Memory
OBS RINEX Observation File
OCXO Oven Controlled Crystal Oscillator
OEM Original Equipment Manufacturer
OP Operational Parameters
OS Open Service
PAC Pulsed Aperture Correlator
PC Personal Computer
PC Phase Centre
P-Code Precise Code
PBIT Power-Up Built-In Test
PCB Printed Circuit Board
PCMCIA Personal Computer Memory Card International Association
PDC Power and Data Card
PDF Power Distribution Function
PDF Portable Document File
PDOP Position Dilution Of Precision
PE-90 Parameters of the Earth 1990 (see PZ90)
PIN Position Indicator
PLL Phase Lock Loop
PPM Parts Per Million
PPP Point to Point Protocol
PPS Precise Positioning Service or Pulse Per Second
PRN# PseudoRandom Noise number
PRS Public Regulated Service
PSN Part Serial Number
PSR Pseudorange
PV Position Valid
PVT Position Velocity Time
PZ90 Parametry Zemli 1990 (see PE-90)
Q Channel Quadrature data-free channel
RAM Random Access Memory
RAS Remote Access Service
RCC Rescue Co-ordination Centre
RF Radio Frequency
RFDC Radio Frequency Direct Current
RFU Radio Frequency Uplink
RHCP Right Hand Circular Polarization
RI Ring Indicator
RINEX Receiver Independent Exchange Format
RLG Ring Laser Gyro
RoHS Restriction of the use of Hazardous Substances
RM Raw Measurements
ROM Read Only Memory
RMA Return Material Authorization
RMS Root Mean Square
RSS Residual Solution Status
RTC Real-Time Clock
RTCA Radio Technical Commission for Aviation Services
RTCM Radio Technical Commission for Maritime Services
RTCMV3 RTCM Version 3.0
RTK Real Time Kinematic
RTS Request To Send
RXD Received Data
SA SMART ANTENNA
SA Selective Availability
SAE Society of Automotive Engineers
SAR Search and Rescue
SARSAT Search and Rescue Satellite Aided Tracking
SBAS Satellite Based Augmentation System
SC Safety Computer
SCAT-I Special Category I
SD Standard Deviation
SEP Spherical Error Probable
SG Signal Generator
SGS-90 Soviet Geodetic System 1990
SI Système Internationale
SigGen WAAS GUS Type-1 Signal Generator
SiS Signal in Space
SLIP Serial Line Internet Protocol
SNAS Satellite Navigation Augmentation System (China)
SNR Signal-to-Noise Ratio
SOL Safety-of-Life
SPS Standard Position Service
sps Symbols Per Second
SPAN™ Synchronized Position Attitude Navigation
SQM Signal Quality Monitoring
SRAM Static Random Access Memory
SS II SUPERSTAR II
SU (former) Soviet Union (now Russia)
SV Space Vehicle
SVID Space Vehicle Identifier
SVN Space Vehicle Number
SW Software
SWRU Software Replacement Unit
TCP Transmission Control Protocol
TCXO Temperature Compensated Crystal Oscillator
TDOP Time Dilution Of Precision
TES Time Estimator Status
TIL Time Integrity Limit
TNM Telecommunications Network Management
TOA Time of Almanac
TOE Time of Ephemeris
TOW Time of Week
TRAIM Time Receiver Autonomous Integrity Monitor
TTFF Time-To-First-Fix
TTL Transistor-Transistor Logic
TTNL Time to Narrow Lane
TVS Transient Voltage Suppressor
TXD Transmitted Data
UART Universal Asynchronous Receiver Transmitter
UDP User Datagram Protocol
UDRE User Differential Range Error
UHF Ultra High Frequency
USB Universal Serial Bus
USGS United States Geological Survey
UTC Coordinated Universal Time
UTC(SU) Coordinated Universal Time (former Soviet Union, now Russia
V AC Volts Alternating Current
V DC Volts Direct Current
VARF Variable Frequency
VBS Virtual Base Station (standard OmniSTAR service)
VCTCXO Voltage Controlled Temperature Compensated Crystal Oscillator
VDOP Vertical Dilution of Precision
VFD Vacuum Fluorescent Display
VFOM Vertical Figure of Merit
VSWR Voltage Standing Wave Ratio
WAAS Wide Area Augmentation System
WAAS G-II WAAS Reference Receiver: G-II
WADGPS Wide Area DGPS
WEEE Waste Electrical and Electronic Equipment
WGS World Geodetic System
WHQL Windows Hardware Quality Lab (Microsoft)
WMP WAAS Message Processor
WNA Week number of almanac
WPT Waypoint
XP Extra Performance (standard OmniSTAR service)
XTE Crosstrack Error
ZUPT Zero Velocity Update