GNSS Glossary

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I/F :

InterFace

I/S :

Interference / Signal

IALA :

International Association of Lighthouse Authorities

IAP :

Interoperability Action Plan

IATA :

International Air Transport Association

ICAO :

International Civil Aviation Organisation

ICB :

Interface Control Board

ICD :

Interface Control Document

ICO :

Intermediate Circular Orbit

ICRB :

Interna Change Review Board

IDEF0 :

Integrated Design Functional model

IERS :

International Earth Rotation Service

IF :

Intermediate Frequency

IFF :

Identifier Friend (or Foe)

IGP :

Ionospheric Grid Points

IGS :

International GPS Service for Geodynalics

IKD :

In Kind Delivery

ILS :

Instrument Landing System or Integrated Logistics Support

IMO :

International Maritime Organisation

INC :

Inmarsat Navigation Center

INMARSAT :

International MARitime SATellite

INS :

Inertial Navigation System

IOC :

Initial Operational Capability

IOD :

Issue Of Data or Issuance Of Data

IODC :

Issuance Of Data Clock

IODE :

Issuance Of Data Ephemeris

IODI :

Issuance Of Data Ionosphere

IODP :

Issuance Of Data PRN

IOP :

Initial Operations Phase

IOR :

INMARSAT III – Indian Ocean Region

IoT :

Internet of Things

IP :

Internet Protocol

IPP :

Ionospheric Pierce Point

IRD :

Interface Requirements Document

IRS :

Inertial Reference System

ISDN :

Integrated Services Digital Network

ISNS :

International Satellite Navigation System

ISO :

International Organization for Standardization

ISOP :

In Service Operations Phase

ISVV :

Independent Software Verification and Validation

ITRF :

International Terrestrial Reference Frame

ITT :

Invitation To Tender

ITU :

International Time Unit

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