39
If the RT-Strut is being used to mount the RT in the vehicle then NAVconfig will have
to be used to configure the orientation or the RT will not work correctly. Page 57 gives
more information on configuring the orientation of the RT in a vehicle.
OxTS NED navigation frame
Table 21. OxTS NED navigation frame definition
Axis Description
North The north axis (N) is perpendicular to the gravity vector and in the direction of the
north pole along the earth’s surface.
East The east axis (E) is perpendicular to gravity, perpendicular to the north axis and is in
the east direction.
Down The down axis (D) is along the gravity vector.
Figure 7. OxTS NED navigation frame definition
The OxTS navigation frame is attached to the vehicle but does not rotate with it. The Down axis is always
aligned to the gravity vector and North always points North.
ISO 8855 ENU earth-fixed system
Table 22. ISO 8855 ENU earth-fixed system
Axis Description
East The east axis (E) is perpendicular to gravity, perpendicular to the north axis and is
in the east direction.
North The north axis (N) is perpendicular to the gravity vector and in the direction of the
north pole along the earth’s surface.