org.orekit.orbits

Class CR3BPDifferentialCorrection

java.lang.Object

org.orekit.orbits.CR3BPDifferentialCorrection

public class CR3BPDifferentialCorrection
extends Object

Class implementing the differential correction method for Halo or Lyapunov Orbits. It is not a simple differential correction, it uses higher order terms to be more accurate and meet orbits requirements.

Since:

10.2

Author:

Vincent Mouraux

See Also:

"Three-dimensional, periodic, Halo Orbits by Kathleen Connor Howell, Stanford University"

Constructor Summary

Constructors

Constructor and Description
CR3BPDifferentialCorrection(PVCoordinates firstguess, CR3BPSystem syst, double orbitalPeriod) Simple Constructor.
CR3BPDifferentialCorrection(PVCoordinates firstguess, CR3BPSystem syst, double orbitalPeriod, AttitudeProvider attitudeProvider, TimeScale utc) Simple Constructor.

Method Summary

Modifier and Type	Method and Description
PVCoordinates	compute(LibrationOrbitType type) Return the real starting PVCoordinates on the Libration orbit type after differential correction from a first guess.
PVCoordinates	computeLyapunov(STMEquations stm) Return the real starting PVCoordinates on the Lyapunov orbit after differential correction from a first guess.
double	getOrbitalPeriod() Get the orbital period of the required orbit.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CR3BPDifferentialCorrection

@DefaultDataContext
public CR3BPDifferentialCorrection(PVCoordinates firstguess,
                                                       CR3BPSystem syst,
                                                       double orbitalPeriod)

Simple Constructor.

Standard constructor using DormandPrince853 integrator for the differential correction

Parameters:

firstguess - first guess PVCoordinates of the point to start differential correction

syst - CR3BP System considered

orbitalPeriod - Orbital Period of the required orbit

CR3BPDifferentialCorrection

public CR3BPDifferentialCorrection(PVCoordinates firstguess,
                                   CR3BPSystem syst,
                                   double orbitalPeriod,
                                   AttitudeProvider attitudeProvider,
                                   TimeScale utc)

Simple Constructor.

Standard constructor using DormandPrince853 integrator for the differential correction

Parameters:

firstguess - first guess PVCoordinates of the point to start differential correction

syst - CR3BP System considered

orbitalPeriod - Orbital Period of the required orbit

attitudeProvider - the attitude law for the numerocal propagator

utc - UTC time scale

Method Detail

compute

public PVCoordinates compute(LibrationOrbitType type)

Return the real starting PVCoordinates on the Libration orbit type after differential correction from a first guess.

Parameters:

type - libration orbit type

Returns:

pv Position-Velocity of the starting point on the Halo Orbit

computeLyapunov

public PVCoordinates computeLyapunov(STMEquations stm)

Return the real starting PVCoordinates on the Lyapunov orbit after differential correction from a first guess.

Parameters:

stm - additional equations

Returns:

pv Position-Velocity of the starting point on the Lyapunov Orbit

getOrbitalPeriod

public double getOrbitalPeriod()

Get the orbital period of the required orbit.

Returns:

the orbitalPeriod