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Spatial FOG Dual Reference Manual
Page 17 of 138
Version 1.0
26/06/2015
Illustration 6: Graphic showing geodetic, NED and ECEF co-ordinates
5.10
ECEF Co-ordinate Frame
The ECEF (Earth-centred earth-fixed) co-ordinate frame is a Cartesian co-ordinate
frame used to represent absolute positions on the Earth. It's origin is at the centre of
the Earth. ECEF is an alternative to the geodetic co-ordinate frame. It is represented
by the three axes X, Y and Z which are presented graphically in Illustration 6. ECEF
positions can be retrieved from Advanced Navigation products however the geodetic
system is used as the default.
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