| Name | Description |
|---|---|
| CrossWindAxis | Vector defined by a cross product of the flight direction and the -Z body axis of the aircraft; directed to along the right wing of the aircraft when in level flight. |
| Velocity(SubPoint) | The velocity of the subpoint in the vehicle's central body fixed (CBF) coordinate system. |
| DragAxis | Unit vector in the direction opposite to the direction of flight. |
| East | Unit vector in the local horizontal plane pointing east. |
| FlightDir | Unit vector in the direction of flight. |
| LiftAxis | Vector defined by a cross product of the Y axis and the flight direction directed up and perpendicular to the flight surfaces of the aircraft; directed along the surface normal when in level flight. |
| MagField(IGRF) | Magnetic field vector based on IGRF model. |
| MagField(WMM) | Magnetic field vector based on WMM model. |
| Moon | Apparent position of the Moon center as seen from the object's center. |
| Moonlight | Apparent direction from which moonlight arrives at the object's location. |
| Nadir(Centric) | Unit vector along the direction from the center of the central body to the object. |
| Nadir(Detic) | Unit vector pointing opposite to the surface normal. |
| NegZAxisProjYZ | Vector defined by a projection of the negative Z axis of the body fixed axes onto a YZ plane of the flight path axes. |
| North | Unit vector in the local horizontal plane pointing north. |
| Position | True position of the object's center with respect to its central body center. |
| RollAxis | X axis of the aircraft body fixed axes; typically pointing along the nose of the aircraft. |
| RotorThrustAxis | Vector defined by a cross product of the cross wind direction and the flight direction. |
| SideForceAxis | Vector defined by a cross product of the flight direction and the lift axis. |
| South | Unit vector in the local horizontal plane pointing south. |
| Sun | Apparent direction from which sunlight arrives at the object's location. |
| SunGlint | Vector from the object to the apparent location of the Sun glint - the point on the central body surface from where the sunlight is reflected back to the object. |
| Sunlight | Apparent direction from which sunlight arrives at the object's location. |
| Velocity | Inertial velocity of the object's center with respect to its central body center |
| Velocity(CBF) | Central body fixed velocity of the object's center with respect to its central body center. |
| West | Unit vector in the local horizontal plane pointing west. |
| Zenith(Centric) | Unit vector along the direction from the center of the central body to the object. |
| Zenith(Detic) | Unit vector pointing along the surface normal. |
STK Programming Interface 11.0.1