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Glossary
Leica GS20 Field Guide-1.1.0en
96
Dilution of precision (DOP )
A description of the purely geometrical contribution of the
uncertainty in a position fix.
Ellipsoid
A mathematical figure formed by revolving an ellipse
about its minor axis, used in geodesy to best fit the shape
of the earth.
Ellipsoidal elevation
The vertical distance of a point above the ellipsoid.
Firmware
Embedded software that resides on a hardware device.
Geoid
An equipotential surface which coincides with mean sea
level and extends everywhere, perpendicular with the
force of gravity.
GIS (Geographic Information System)
Geographic Information System
GIS DataPRO
The office software used interact between the Leica
Geosystems GS20 and GIS and CAD packages.
GPS
Global Positioning System
GPS Time
A continous time system based on the Coordinated
Universal Time (UTC) from 6th January 1980.
Greenwich Mean Time
The mean solar time of the meridian of Greenwhich. Used
as the prime basis of standard time throughout the world.
HyperTrack
Leica’s Trademark tracking technology created for very
inhospitable environments, for ex. Urban Canyons.
Job
A Leica Geosystems GS20 Project consisting of multiple
filetypes.
Latitude
The angle between the ellipsoidal normal and the
equatorial plane. Latitude is zero on the equator and 90o
at the poles.
Loader
The software that loads the firmware into the hardwares
system memory on boot.
Local Time
Local time equals GPS time + time zone.
Logging rate
The rate in which raw GPS data are written