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GPS Acronyms

Below is a list of acronyms that you may come across while playing with GPS technologies.

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Acronym Details
I and Q In-Phase and Quadrature (Channels)
I Channel In-phase data channel
I/O Input/Output
IALA International Association Of Lighthouse Authorities
IBIT Initiated Built In Test
IC Integrated Circuit
ICAO International Civil Aviation Organization
ICD Interface Control Document
ICP Integrated Carrier Phase
ICS Interim Control Segment
ID Identification
IEC International Electrotechnical Commission
IEEE Institute Of Electrical And Electronics Engineers
IERS International Earth Rotation Service
IF Intermediate Frequency
IF I ntermediate Frequency
IFR Instrument Flight Rules
IGEB Interagency GPS Executive Board
IGP Ionospheric Grid Point
IGRF International Geometric Reference Field
IGS International GPS Service
IGS CB International GPS Service Central Bureau
ILS Instrument Landing System
IM Intermodulation
IMLA Integrated Multipath Limiting Antenna
IMO International Maritime Organization
IMU Inertial Measurement Unit
INH Inhibit
INS Inertial Navigation System
IOC Initial Operational Capability
IODE Issue of Data (Ephemeris)
ION Institute Of Navigation
IOV In-Orbit Validation
IP Internet Protocol
IRQ Interrupt Request
IRU Inertial Reference Unit
ISG IF Signal Generator
ISO International Standards Organization
ITRF International Terrestrial Reference Frame
ITS Intelligent Transportation System
ITU International Telecommunication Union
IVHS Intelligent Vehicle Highway Systems

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