navigation acronyms, abbreviations and definitions - International ...

GEC groundtrack equatorial crossing
Equatorial angle from the prime meridian to the location that a
groundtrack intersects the equator when crossing from the southern
to northern hemisphere.
GEMINUS Galileo European Multimodal Integrated Navigation User System
EC study to define Galileo services. Consortium led by Racal. Nov 99 -
Dec 00.
GEMS GPS Environment Monitoring System (spectrum analyser for GPS
GENESIS Galileo Euro Network of Experts to Support the Euro CommISsion
Nov 99 - Nov 03.
GEO geosychonous equatorial orbit
Satellite height of 35,786 km in equatorial plane.
GEO Group on Earth Observations
International group formed in 2003 to coordinate other EO groups.
Geocentric lat Angle at the centre of of the reference ellipsoid between the celestial
equator and the radius vector to a point on the ellipsoid.
Geocentric lon Angle between the plane of the geocentric prime meridian and the
plane of a point’s geocentric meridian.
Geodesy Science concerned with surveying and mapping the earth's
surface to determine, e.g., its exact size, shape and gravitational
field.
Geodetic accuracy The accuracy of a position with respect to the geodetic coordinates of
the earth (IMO).
Geodetic datum A set of parameters specifying the reference coordinate system used
for geodetic control in the calculation of coordinates of points on the
earth (ISO).
Geodetic lat Angular distance between the plane of the geodetic equator and the
normal to a point on the earth ellipsoid.
Geodetic lon Angular distance between the plane of the geodetic prime meridian and
the plane of a point’s geodetic meridian.
Geographic
accuracy
The accuracy of a position with respect to the geographic coordinates
of the earth (IMO).
GEOLUT GEostationary Orbit Local User Terminal
GeoRSS Geospacial Really Simple Syndication (for position-related data)
GEOSAR geostationary satellites of COSPAS-SARSAT
GES ground earth station
GETR Galileo Experimental Test Receiver (for GIOVE satellites)
GFE government-furnished equipment
GFS Galvani-Faraday-Sense (of earth's magnetic field)
GGC Galileo Global Component
GGS GPS ground station
GGTO GPS-Galileo Time Offset
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