| X
- | X component
of vehicle position (units of length) |
| Y
- | Y component
of vehicle position (units of length) |
| Z
- | Z component
of vehicle position (units of length) |
| XD
- |
- X component
of vehicle velocity (units of length per time) first derivative
of X position
|
| YD
- |
- Y component
of vehicle velocity (units of length per time) first derivative
of Y position
|
| ZD
- |
Z component of
vehicle velocity (units of length per time) first derivative
of Z position
|
