Package org.orekit.propagation.analytical.tle.generation

Class LeastSquaresTleGenerationAlgorithm

java.lang.Object

org.orekit.orbits.AbstractOrbitalParameterFactory<TLE>

org.orekit.propagation.analytical.tle.generation.TleGenerationAlgorithm

org.orekit.propagation.analytical.tle.generation.LeastSquaresTleGenerationAlgorithm

All Implemented Interfaces:

Cloneable, OrbitalParameterFactory<TLE>

public class LeastSquaresTleGenerationAlgorithm
extends TleGenerationAlgorithm

Least squares method to generate a usable TLE from a spacecraft state.

Since:

12.0

Author:

Mark Rutten

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_MAX_ITERATIONS	Default value for maximum number of iterations.

Fields inherited from class org.orekit.propagation.analytical.tle.generation.TleGenerationAlgorithm

B_STAR, B_STAR_SCALE, ECCENTRICITY, INCLINATION, MEAN_ANOM, MEAN_MOTION, PERIAPSIS_ARGUMENT, RAAN

Constructor Summary

Constructors

Constructor	Description
LeastSquaresTleGenerationAlgorithm(TLE templateTLE)	Default constructor.
LeastSquaresTleGenerationAlgorithm(TLE templateTLE, int maxIterations)	Default constructor.
LeastSquaresTleGenerationAlgorithm(TLE templateTLE, int maxIterations, TimeScale utc, Frame teme)	Constructor.
LeastSquaresTleGenerationAlgorithm(TLE templateTLE, TimeScale utc, Frame teme, LeastSquaresConverter converter)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	getRms()	Get the Root Mean Square of the TLE estimation.

Methods inherited from class org.orekit.propagation.analytical.tle.generation.TleGenerationAlgorithm

clone, createFromDrivers, generate, generate, getBStar, getConverter, getJacobianWrtParameters, getJacobianWrtParameters, getNonKeplerianParametersDrivers, getTemplateTLE, toArray

Methods inherited from class org.orekit.orbits.AbstractOrbitalParameterFactory

getDate, getFrame, getJacobianWrtCartesian, getMu, getOrbitalParametersDrivers, getOrbitType, getPositionAngleType, reset, setDate, setFrame, setMu, setPositionAngleType

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_MAX_ITERATIONS

public static final int DEFAULT_MAX_ITERATIONS

Default value for maximum number of iterations.

See Also:

• Constant Field Values

Constructor Details

LeastSquaresTleGenerationAlgorithm

@DefaultDataContext
public LeastSquaresTleGenerationAlgorithm(TLE templateTLE)

Default constructor.

Uses:

• the default data context
• DEFAULT_MAX_ITERATIONS
• the LevenbergMarquardtOptimizer

Parameters:

templateTLE - template TLE

Since:

14.0

LeastSquaresTleGenerationAlgorithm

@DefaultDataContext
public LeastSquaresTleGenerationAlgorithm(TLE templateTLE,
 int maxIterations)

Default constructor.

Uses:

• the default data context
• the LevenbergMarquardtOptimizer

Parameters:

templateTLE - template TLE

maxIterations - maximum number of iterations for convergence

Since:

14.0

LeastSquaresTleGenerationAlgorithm

public LeastSquaresTleGenerationAlgorithm(TLE templateTLE,
 int maxIterations,
 TimeScale utc,
 Frame teme)

Constructor.

Uses the LevenbergMarquardtOptimizer.

Parameters:

templateTLE - template TLE

maxIterations - maximum number of iterations for convergence

utc - UTC time scale

teme - TEME frame

Since:

14.0

LeastSquaresTleGenerationAlgorithm

public LeastSquaresTleGenerationAlgorithm(TLE templateTLE,
 TimeScale utc,
 Frame teme,
 LeastSquaresConverter converter)

Constructor.

Enables to select the optimizer for the least-squares converter.

Parameters:

templateTLE - template TLE

utc - UTC time scale

teme - TEME frame

converter - osculating to mean orbit converter using a least-squares algorithm

Since:

14.0

Method Details

getRms

public double getRms()

Get the Root Mean Square of the TLE estimation.

Be careful that the RMS is updated each time the AbstractOrbitalParameterFactory.reset(Orbit) method is called.

Returns:

the RMS