AOR-E Inmarsat Atlantic Ocean Region – East
AOR-W Inmarsat Atlantic Ocean Region – West
DOY Day Of Year
EGNOS European Geostationary Navigation Overlay Service
EMS EGNOS Message Server
ESA European Space Agency
ESTB EGNOS System Test Bed
FC Fast Correction
FTP File Transfer Protocol
GIVE Grid Ionospheric Vertical Error
GNSS Global Navigation Satellite System
GUI Graphical User Interface
IGP Ionospheric Grid Point
INMARSAT International Maritime Satellite Organisation
IOR Inmarsat Indian Ocean Region
IOR-W Inmarsat Indian Ocean Region-West
MOPS Minimum Operational Performance Standards
MT Message Type
PRC Pesudo Range Correction
PRN Pseudo Random Noise
RTCA Radio Technical Commission for Aeronautics
SBAS Satellite Based Augmentation System
SIS Signal In Space
UDRE User Differential Range Error
UDREI User Differential Range Error Indicator
WAAS Wide Area Augmentation System