Local horizontal frame. This frame has
the Z axis aligned with the inward surface normal direction (minus
Z is up) and the X axis constrained toward the local north
direction.
| Name |
Dimension |
Type |
Description |
| Normal x |
Unitless |
Real Number |
First component of the unit vector along the normal
to the selected plane in the reference coordinate system. Defines
projection of the unit vector onto the x-axis of the reference
coordinate system. |
| Normal y |
Unitless |
Real Number |
Second component of the unit vector along the
normal to the selected plane in the reference coordinate system.
Defines projection of the unit vector onto the y-axis of the
reference coordinate system. |
| Normal z |
Unitless |
Real Number |
Third component of the unit vector along the normal
to the selected plane in the reference coordinate system. Defines
projection of the unit vector onto the z-axis of the reference
coordinate system. |
| Slope |
AngleUnit |
Real Number |
The slope of the ground relative to the local
horizontal plane. Zero indicates level ground. Value is independent
of selected coordinate system. |
| Azimuth |
LongitudeUnit |
Real Number |
Dihedral angle between north vector and velocity
vector about the detic nadir vector. The velocity vector is the
velocity of the object, as observed in the object's central body
fixed coordinate system. |