Description
Propagators used for calculating ephemeris for look ahead purposes. The enumeration is used with realtime propagators.
Members
| Member | Value | Description |
|---|---|---|
| eLookAheadUnknown | -1 | Reserved for look ahead propagators that are not currently supported. |
| eLookAheadHoldCBIPosition | 0 | The HoldCBIPosition look ahead propagator keeps position and velocity constant in the inertial (i.e., CBI) frame. |
| eLookAheadHoldCBFPosition | 1 | The HoldCBFPosition look ahead propagator keeps position and velocity constant in the fixed (i.e., CBF) frame. |
| eLookAheadTwoBody | 2 | Two-Body is an analytical propagator that generates ephemeris by evaluating a formula. |
| eLookAheadJ2Perturbation | 3 | The J2 Perturbation (first-order) propagator accounts for secular variations in the orbit elements due to Earth oblateness. |
| eLookAheadJ4Perturbation | 4 | The J4 Perturbation (second-order) propagator accounts for secular variations in the orbit elements due to Earth oblateness. |
| eLookAheadDeadReckon | 5 | The DeadReckon look ahead propagator projects the motion of the vehicle along a straight line, along the last velocity vector. |
| eLookAheadBallistic | 6 | The Ballistic Propagator defines an elliptical path that begins and ends at the Earth's surface. Specifying a fixed flight time, initial velocity or altitude can further refine the shape of the trajectory. |