AltBOCAlternative Binary Offset Carrier
APV(-I)Approach Procedure/Operations with Vertical Guidance


Advanced Receiver/Ranging Autonomous Integrity Monitoring
CDMACode Division Multiple Access
CICoherent Integration
COTSCommercial Off The Shelf
C/NoCarrier-to-Noise Ratio
DMDay Milestone
DOPDilution of Precision
EASAEuropean Aviation Safety Authority
ECEFEarth Centered Earth Fixed
EGNOSEuropean Geostationary Navigation Overlay Service
ESAEuropean Space Agency
EUROCAEEuropean Organisation for Civil Aviation Equipment
EurocontrolEuropean Organisation for the Safety of Air Navigation
FDMAFrequency Division Multiple Access
GATEGerman Galileo Test and Demonstration Environment
GDOPGeometrical Dilution of Precision
GEOGeostationary Earth Orbit
GLONASSGlobalnaja nawigazionnaja sputnikowaja sistema (Global Navigation Satellite System)
GNSSGlobal Navigation Satellite System
GPSGlobal Positioning System
GSOGeo-Synchronous Orbit
GUIGraphical User Interface
HDOPHorizontal Dilution of Precision
HEOHigh Earth Orbit and Elliptical Orbit
IDIdentification / identifier
IGSOInclined Geo-Synchronous Orbit
L1L1-GPS frequency (L1 = 1575,42 MHz)
L2L2-GPS frequency (L1 = 1227,2 MHz)
LEOLow Earth Orbit
MSASMulti-functional Satellite Augmentation System
MEOMedium Earth Orbit
NCINon-Coherent Integration
NCSNavigation Constellation Simulator
NMEANational Marine Electronics Association
OSOperating System
PPSPulse Per Second
PRNPseudo Random Noise
PRS(Galileo) Public Regulated Service
PVTPosition, Velocity and Time
QZSSQuasi-Zenith Satellite System
RFRadio Frequency
RTKReal Time Kinematics
S/NSignal to Noise Ratio
SoCStatement of Compliance
SoWStatement of Work
TCXOTemperature Controlled Oscillator
TDMATime Division Multiple Access
TDOPTime Dilution of Precision
TECTotal Electron Content
UTCUniversal Time Coordinated
VDOPVertical Dilution of Precision
WAASWide Area Augmentation System