Methods of Orbit Propagation. Jim Woodburn. Why are you here?. You want to use space You operate a satellite You use a satellite You want to avoid a satellite You need to exchange data You forgot to leave the room after the last talk. Motivation.
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Definition – Position and velocity at a requested time are computed directly from initial conditions in a single step
Definition – Orbit trajectories are computed via numerical integration of the equations of motion
One must marry a formulation of the equations of motion with a numerical integration method
VOP isNOTan approximation
Share acceleration model with CEM (minus 2Body)
Physics incorporated into formulation
Errors at level of numerical precision for 2Body
Additional code required
Error control less effective
Loses some advantages in a high frequency forcing environmentVOP Pros & Cons