navigation acronyms, abbreviations and definitions - International ...

GIWG GPS International Working Group (US, State Dept chair)
GJU Galileo Joint Undertaking (to become GSA)
GL Germanischer Lloyd (classification society)
GLA General Lighthouse Authority (CIL, NLB, TH)
GLAN geographic longitude of the ascending node (of a satellite orbit)
Equatorial angle from the prime meridian to the ascending node.
GLESOC Generic Local Element Service and Operating Centre (GNSS)
GLF General Lighthouse Fund
Meets the costs of the GLAs. Derives income mainly from light dues
charged on commercial shipping calling at UK & Rep of Ireland ports.
GLNS GPS landing and navigation system
GLNU GPS landing and navigation unit
GLONASS GLObal NAvigation Satellite System
Russian Federation’s GLObal’naya NAvigatsionaya Sputnikova Sistema.
Equivalent of GPS. Spec is 24 sats in 3 x 64.8º orbital planes at 19,100
km altitude giving 11 h 15 m orbit time. Operational late 2012?
GLONASS-K Third generation GLONASS system
Satellites are smaller and lighter with 10-year operational life. 2005
-22.
GLONASS-KM Fourth generation GLONASS system
Requirement generated in 2002 for deployment 2015-35.
GLONASS-M Second generation GLONASS system
Satellites are smaller and lighter with 7-year operational life. First
launch of 1 sat on 1 Dec 01. Op deployment 2003-13.
GLORIA GNSS & Loran-C in Road & Rail Applications (EC)
GLOSS Global Sea Level Observing System
Research programme coordinated by the IOC.
GLRT generalised likelihood ratio test
GLS GPS/GNSS Landing System
Precision approach equivalent to ILS. Requires 40 m HAL and 12 m
VAL protection and will be available from LAAS (or WAAS with L5
frequency available).
GLS GPS/GNSS Landing Unit
GLT guided light transit (eg guided bus)
GM Gauss-Markov (form of Kalman filter)
GMC ground movement controller (ATC)
GMDSS Global Maritime Distress & Safety System (see Sea Areas)
GMES Global Monitoring on Environment and Security (EU/ESA sats)
GML Geography Mark-up Language
Format for digital mapping - eg OS MasterMap Address Layer 2.
GMO Geospatial Management Office (US)
GMS Ground Mission Segment (Galileo)
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