Ecef Co-Ordinate Frame - Advanced Navigation Spatial OEM Reference Manual

Spatial OEM Reference Manual
Page 17 of 88
Version 2.7
Z
ecef
North Pole
North
East
Down
Latitude
Y
ecef
Longitude
X
ecef
South Pole
Illustration 12: Graphic showing geodetic, NED and ECEF co-ordinates
2.9

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 12. ECEF positions can be retrieved from Advanced
Navigation products however the geodetic system is used as the default.