Description
Trajectory axes coordinate types.
Members
| Member | Value | Description |
|---|---|---|
| eCrdnTrajectoryAxesICR | 0 | Intrack Crosstrack Radial Axes. The Z axis is outward along the position vector (radial); the Y axis is along the cross product of the position and velocity (crosstrack); the X axis is in the direction of motion and constructed as Y x Z (intrack). |
| eCrdnTrajectoryAxesVNC | 1 | Velocity - Normal - Co-normal Axes. The X axis is along the velocity vector; the Y axis is along the cross product of the position and velocity (normal); the Z axis is constructed as X x Y (co-normal). |
| eCrdnTrajectoryAxesRIC | 2 | Radial Intrack Crosstrack Axes. The X axis is outward along the position vector (radial); the Z axis is along the cross product of the position and velocity (crosstrack); the Y axis is in the direction of motion and is constructed as Z x X (intrack). |
| eCrdnTrajectoryAxesLVLH | 3 | Local Vertical, Local Horizontal Axes. The X axis is along the position vector (local vertical); the Z axis is along the cross product of the position and velocity; the Y axis is in the direction of motion and constructed as Z x X (local horizontal). |
| eCrdnTrajectoryAxesVVLH | 4 | Vehicle Velocity, Local Horizontal Axes. The Z axis is along the negative position vector; the Y axis is along the negative cross product of the position and velocity (local horizontal); the X axis is constructed as Z x Y (toward velocity). |
| eCrdnTrajectoryAxesBBR | 5 | Body-to-body Rotating Axes. The X axis is along the negative position vector; the Z axis is along the cross product of the position and velocity; the Y axis is constructed as Z x X. |
| eCrdnTrajectoryAxesEquinoctial | 6 | Equinoctial Axes. The Z axis is along the orbit normal; the X axis is along fiducial direction located by rotating about Z-axis by negative of RAAN value; the Y axis is constructed as Z x X. The X and Y axes lie in the orbit plane but (usually) evolve slowly as they depend only on inclination and RAAN. |
| eCrdnTrajectoryAxesNTC | 7 | Normal - Tangential - Crosstrack Axes. The Y axis is along the velocity vector (tangential); the Z axis is along the cross product of the position and velocity (crosstrack); the X axis is constructed as Y x Z (normal). |