navigation acronyms, abbreviations and definitions - International ...

GPC GIOVE Processing Centre
Located at ESA’s European Space Research and Technology
Centre (ESTEC) in Noordwijk, Netherlands.
GPIAA Gabinete de Prevenção e Investigação de Acidentes com Aeronaves
Portugese air accident board.
GPIP glidepath intercept point (of landing aircraft)
GPMS GPS Perfomance Monitoring System (UK NATS)
GPNTS GPS-based Positioning, Navigation and Timing Service (USN)
GPO GPS (Joint) Program Office (US)
GPRS General Packet Radio Service (GSM-based protocol; ‘2.5G’)
Mobile phone protocol from 2000 using packet switching at 171.2 kbps.
GPS Global Positioning System (NAVSTAR)
Spec is 21 + 3 sats in 6 orbital planes at 55º inclination and 20,200 km
altitude, giving 12 h orbits.
GPS III Next generation GPS (first launch 2013?)
GPS Time Time to which GPS signals are referred
A composite of all monitor and satellite system clocks, steered over a
period to keep within 1 microsec of UTC, ignoring UTC leap seconds.
Equalled UTC in Jan 80; on 1 Jan 06 was ahead of UTC by 14 secs.
GPS Week Modulo 1,024 number of elapsed GPS weeks
Began 6 Jan 80 with first roll-over on 22 Aug 99.
GPS-CV GPS Common View (mode of operating for time transfer)
GPS/GSM Global Positioning System/Global System for Mobile Communication
GPS+ (or G3) GPS, GLONASS and Galileo
GPSDO GPS disciplined oscillator (free runs if GPS unavailable)
GPSOC GPS Operations Center (USAF - SCHRIEVER AFB)
GPTS Global Positioning and Timing Service
GPU graphics processing unit
GPWC ground proximity warning computer
GPWS Ground Proximity Warning System
GR hail >5 mm (met)
GRACE Generalised Rules for Advanced Constellation Evaluation
GRACE GNSS Research & Applications Centre of Excellence (Nottingham)
GRACE Gravity Recovery and Climate Experiment (2 sats - NASA)
GRADU gradual (met reports)
GRAIL Galileo introduction in the RAIL sector
GRAM GPS receiver application module
GRAPE GPS Routine for Attitude Parameter Estimation
Software package for processing GPS signals.
GRAS GPS Receiver for Atmospheric Sounding
GRAS Ground-based Regional Augmentation System (GPS)(Australia, Russia)
GRASP Geodetic Reference Antenna in Space
To enhance GNSS, particularly to measure sea and ice level ht changes.
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