| [A] |
|---|
| ABAS | Aircraft-based Augmentation System |
| AD | Applicable Document |
| ADF | Automatic Direction-Finding Equipment |
| ADS | Automatic Dependent Surveillance |
| AFS | Aeronautical Fixed Service |
| AFTN | Aeronautical Fixed Telecommunication Network |
| ADR | Architectural Design Review |
| AGL | Above Ground Level |
| AIRMET | AIRman's METeorological Information |
| AIT | Advanced Intelligent Tape |
| AIV | Assembly, Integration and Verification |
| AIVP | Assembly, Integration and Verification Plan |
| AIVQ | Assembly, Integration, Verification & Qualification |
| ALS | Approach lighting system |
| AM | Amplitude Modulation |
| AMCS | AlternateMaster Control Station |
| AMHS | Aeronautical Message Handling System |
| AMS | Aeronautical Mobile Service |
| ANSI | American National Standards Institute |
| ANSP | Air Navigation Services Provider |
| AOA | Angle Of Arrival |
| AOC | Advance Operational Capability |
| AOR | Atlantic Ocean Region |
| AOR-E | Atlantic Ocean Region - East |
| AOR-W | Atlantic Ocean Region - West |
| AR | Acceptance Review |
| APAPI | Abbreviated precision approach path indicator |
| APV | Aproach with Vertical Guidance |
| ARNS | Aeronautical Radio Navigation Service |
| ARTES | Advanced Research in Telecommunication Systems |
| ARTCC | Air Route Traffic Control Center |
| ASCII | American Standard Code for Information Interchange |
| ASIC | Application Specific Integrated Circuit |
| ASM | Airspace Management |
| ATC | Air Traffic Control |
| ATM | Air Traffic Management |
| ATM | Asynchronous Transfer Mode |
| ATO | Approved Training Organisation |
| ATS | Air Traffic Service |
| ATSU | Air Traffic Status Unit |
| AWGN | Additive White Gaussian Noise |
| [B] |
|---|
| BIT | Built-in Test |
| BPSK | Bniary Phase Shift Keying |
| BVLOS | Beyond Visual Line Of Sight |
| [C] |
|---|
| C3S | Copernicus Climate Change Service |
| CAA | Civil Aviation Authority |
| CAMS | Copernicus Atmosphere Monitoring Service |
| CASC | China Aerospace Science and Technology Corporation |
| CAT-1 | Category 1 Precision Approach Phase of Flight |
| CC-M | Central Synchroniser |
| CCB | Change Configuration Board / Configuration Control Board |
| CCF | Central Control Facility |
| CCN | Contract Change Notice |
| CDI | Course Deviation Indicator (VOR) |
| CDMA | Code Division Multiple Access |
| CDR | Critical Design Review |
| CED | Clock Ephemeris Data |
| CEMS | Copernicus Emergency Management Service |
| CFI | Customer Furnished Item |
| C/N0 | Carrier to Noise-density-ratio |
| CLMS | Copernicus Land Monitoring Service |
| CMEMS | Copernicus Marina Environment Monitoring Service |
| CN | Change Notice |
| CPF | Central Processing Facility |
| CPU | Central Processing Unit |
| CR | Change Request |
| CRC | Cyclic Redundancy Check |
| CRPA | Controlled-Reception Pattern Antennas |
| CSAR | Configuration Status Accounting Report |
| CSS | Copernicus Security Service |
| CW | Continuous Wave |
| [D] |
|---|
| DAT | Digital Audio Tape |
| DCN | Document Change Notice |
| DDR | Detailed Design Review |
| DFMC | Dual Frequency Multi-Constellation |
| DFS | Deutsche Flugsicherung GmbH (DE) |
| DGAC | Dirección General de Aviación Civil (ES) |
| DGAC | Direction Generale Aviation Civile (FR) |
| DGNSS | Differential GNSS |
| DGPS | Differential GPS |
| DJF | Design Justification File |
| DME | Distance Measuring Equipment |
| DVOR | Doppler VHF Omnidirectional Range |
| DVP | Development Verification Platform |
| DoD | US Department of Defense |
| DOP | Dilution of Precision |
| DoY | Day of Year |
| [E] |
|---|
| EASA | European Aviation Safety Authority |
| EATM | European Air Traffic Management |
| EATMN | European Air Traffic Management Network |
| EATMP | European Air Traffic Management Program |
| EC | European Commission
| ECAC | European Civil Aviation Conference |
| EDAS | EGNOS Data Access Service |
| EEA | European Environment Agency |
| EETES | EGNOS End To End Simulator |
| EGEP | European GNSS Evolution Programme |
| EGNOS | European Geostationary Navigation Overlay Service |
| EMS | EGNOS Message Server |
| ENAV | Ente Nationale di Assistenze al Volo (IT) |
| ENMA | EGNOS Network Management Application |
| EOIG | EGNOS Operators and Infrastructure Group |
| ESA | European Space Agency |
| ESSP | European Satellite Services Provider |
| ESSF | EGNOS System Simulation Facility |
| ESTB | EGNOS System Test Bed |
| ESVS | EGNOS Service Volume Simulator |
| ETSO | European Technical Standard Order |
| EU | European Union |
| EUMETSAT | European Organisation for the Exploitation of Meteorological Satellites |
| EUROCAE | European Organisation for Civil Aviation Equipment Manufacturers |
| EUSPA | European Union Space Programme Agency |
| EV3 | EGNOS v3 |
| EWA | EGNOS Working Agreement |
| EWAN | EGNOS Wide Area Network |
| EWS | Emergency Warning Service |
| [F] |
|---|
| FAA | Federal Aviation Administration |
| FANS | Future Air Navigation Systems |
| FAS | Final Approach Segment |
| FAT | Factory Acceptance Tests |
| FDIR | Failure Detection , Isolation and Recovery |
| FDMA | Frequency Division Multiple Access |
| FEE | Front End Equipment |
| FFPA | Financial Framework Partnership Agreement |
| FHA | Functional Hazard Assessment |
| FIR | Flight Information Region |
| FMS | Flight Management System |
| FMECA | Failure Mode Effects & Criticality Analysis |
| FOC | Fully Operational Capability |
| FPD | Flight Procedure Design |
| FQR | Factory Qualification Review |
| [G] |
|---|
| GA | Ground Antennas |
| GAMET | General Aviation METeorological forecast |
| GBAS | Ground Based Augmentation System |
| GCC | Ground Control Centre |
| GCS | Ground Control Segment |
| GDOP | Geometric Dilution of Precision |
| GEO | Geostationary Earth Orbit Satellite |
| GIC | GNSS Integrity Channel |
| GIOVE | Galileo In-Orbit Validation |
| GIVE | Grid Ionospheric Vertical Error |
| GLONASS | Global Navigation Satellite System |
| GLS | GBAS Landing System |
| GMS | Ground Mission Segment |
| GNSS | Global Navigation Satellite System |
| GPRS | General Packet Radio Services |
| GPS | Global Positioning System |
| GSA | European GNSS Agency |
| GSM | Global System for Mobile communications |
| GSS | Galileo Sensor Stations |
| [H] |
|---|
| HAS | High Accuracy Service |
| HDOP | Horizontal Dilution of Precision |
| HE | Horizontal Error |
| HE | Hosting Entity |
| HPE | Horizontal Positioning Error |
| HMI | Hazardous Misleading Information |
| HPL | Horizontal Protection Level |
| HRM | Holistic Risk Model |
| HSI | Horizontal Situation Indicator (VOR) |
| HWIR | Horizontal Worst Integrity Ratio |
| [I] |
|---|
| IAS | Indicated Air Speed |
ICAO | International Civil Aviation Organisation |
| ICD | Interface Control Document |
| IERS | International Earth Rotation and Reference Systems Service |
| IFF | Identification Friend or Foe |
| IGP | Ionospheric Grid Point |
| IGS | International GNSS Service |
| IKD | In Kind Delivery |
| IKP | Intermediate Key Point |
| ILS | Instrument Landing System or Integrated Logistics Support |
| IMO | International Maritime Organization |
| INS | Inertial Navigation System |
| IONEX | Ionosphere map Exchange format |
| IOD | Issue of Data |
| IODE | Issue Of Data Ephemeris |
| IODF | Issue of Data Fast Correction |
| IODI | Issue of Data Ionospheric |
| IODP | Issue of Data PRN mask |
| IODS | Issue of Data Service |
| IOR | Indian Ocean Region |
| IOV | In-Orbit Validation |
| IPP | Ionospheric Pierce Point |
| ISO | International Organization for Standardization |
| IRD | Infrastructure Requirements Document |
| IRD | Interface Requirements Document |
| ITT | Invitation To Tender |
| ITU | International Telecommunications Union |
| IWG | Interoperability Working Group |
| [J] |
|---|
| JTC | Joint Tripartite Committee |
| [K] |
|---|
| KOM | Kick Off Meeting |
| [L] |
|---|
| LS | Laser Station |
| LTC | Long Term Corrections |
| LVP | Low Visibility Procedures |
| LVTO | Low Visibility Take-Off |
| [M] |
|---|
| MA | Multiple Access |
| MCC | Master Control Centre |
| MCS | Master Control Station |
| MEO | Medium Earth Orbit |
| MLS | Microwave Landing system |
| MOPS | Minimum Operational Performance Specification |
| MRD | Mission Requirements Document |
| MS | Monitoring Stations |
| MT | Message Type |
| MTB | Mediterranean Test Bed |
| MTBCF | Mean Time Between Critical Failures |
| MTBF | Mean Time Between Failures |
| MTOM | Maximun Take-Off Mass |
| MTTR | Mean Time To Repair |
| [N] |
|---|
| NATS | National Air Traffic Services (UK) |
| NDB | Non Directional Beacon |
| NGA | National Geospatial-Intelligence Agency |
| NLES | Navigation Land Earth Station |
| NOTAM | Notice To Air Men |
| NPA | Non Precision Approach |
| [O] |
|---|
| OBS | Omni-Bearing Selector (VOR) |
| OEMs | Original Equipment Manufacturers |
| OKP | Operational Key Point |
| OP | Operator |
| ORR | Operational Readiness Review |
| OS | Open Service |
| OSNMA | Open Service Navigation Message Authentication |
| OWA | Operational Workaround |
| [P] |
|---|
| PA | Precision Approach |
| PACF | Performance Assessment and Check-out Platform |
| PBN | Performance Based Navigation |
| PDOP | Position Dilution of Precision |
| PDR | Preliminary Design Review |
| PEGASUS | Prototype EGNOS and GBAS Analysis System Using SAPPHIRE |
| PIDS | Prime Item Development Specification |
| PIN | Prior Information Notice |
| PL | Protection Level |
| PNT | Position Navigation Timming |
| PPP | Precise Point Positioning |
| PPS | Precise Positioning System |
| PRC | Pseudo Range Correction |
| PRN | Pseudo Random Noise |
| PRS | Public Regulated Service |
| [Q] |
|---|
| QR | Qualification Review |
| [R] |
|---|
| RADAR | Radio Detection and Ranging |
| RAIM | Receiver Autonomous Integrity Monitoring |
| RAMS | Reliability Availability, Maintainability and Safety |
| RD | Reference Document |
| RFI | Radio Frequency Interference |
| RFP | Request For Proposa |
| RINEX | Receiver Independent EXchange format |
| RINEX-B | Receiver Independent EXchange format Binary |
| RIMS | Ranging and Integrity Monitoring Station |
| RNAV | Area Navigation |
| RNP | Required Navigation Performance |
| RNSS | Radio Navigation Satellite Service |
| RPAS | Remotely Piloted Aircraft Systems |
| RRC | Range Rate Correction |
| RSS | Root Sum Square |
| RTCA | Radio Technical Commission for Aeronauticsa |
| RTMC | Radio Technical Commission for Maritime |
| RTP | Request to Participate |
| RVR | Runaway Visual Range |
| [S] |
|---|
| S/A | Selective Availability |
| SAL | Security Aspects Letter |
| SAPPHIRE | Satellite and Aircraft Data Base for System Integrity Research |
| SAR | Search and Rescue |
| SARPs | Standards And Recommended Practices |
| SBAS | Satellite Based Augmentation System |
| SCG | Security Classification Guide |
| SCAR | Software Component Acceptance Review |
| SCC | System Control Centre |
| SDD | Service Definition Document |
| SIGMET | Significant Meteorological Information |
| SIS | Signal In Space |
| SISNeT | Signal-In-Space through the Internet |
| SITA | Sociedad Internacional de Telecomunicaciones Aeronáuticas |
| SNR | Signal to Noise Ratio |
| SoL | Safety Of Life |
| SoW | Statement of Work |
| SP | Service Provider |
| SPE | Speed Precision Error |
| SPP | Standard Point Positioning |
| SPS | Standard Positioning System |
| SRD | System Requirements Document or Software Requirement Document |
| STNA | Service Technique Navigation Aerienne (FR) |
| SV | Space Vehicle |
| SVN | Space Vehicle Number |
| [T] |
|---|
| TACAN | Tactical Air Navigational System |
| TAS | True Air Speed |
| TCP UAS | Transport Control Protocol User Application Software |
| TDOA | Time Difference Of Arrival |
| TDOP | Time Dilution Of Precision |
| TN | Technical Note |
| TPE | Timing Precision Error |
| TRB | Test Review Board |
| TSO | Technical Standard Order |
| TT&C | Telemetry, Tracking and Control |
| TTFF | Time To First Fix |
| TOW | Time of Week |
| TS | Timing Service |
| [U] |
|---|
| UHF | Ultra High Frecuency |
| UDRE | User Differential Range Error |
| ULS | Uplink Stations |
| URA | User Range Accuracy |
| USAF | United States Air Force |
| UTC | Coordinated Universal Time |
| [V] |
|---|
| VDOP | Vertical Dilution of Precision |
| VE | Vertical Error |
| VHF | Very High Frecuency |
| VLF | Very Low Frecuency |
| VLOS | Visual Line Of Sight |
| VOR | Very High Frequency Omnidirectional Range |
| VPE | Vertical Precision Error |
| VPL | Vertical Protection Level |
| VSAT | Very Small Aperture Terminal |
| VWIR | Vertical Worst Integrity Ratio |
| [W] |
|---|
| WAAS | Wide Area Augmentation System |
| WAD | Wide Area Differential corrections |
| WAN | Wide Area Network |
| WGA | World Geodesic System |
| WIR | Worst Integrity Ratio |
| WP | Work Package |
| WRS | WAAS Reference Stations |