org.orekit.propagation.conversion

Class TLEPropagatorBuilder

java.lang.Object

org.orekit.propagation.conversion.AbstractPropagatorBuilder

org.orekit.propagation.conversion.TLEPropagatorBuilder

All Implemented Interfaces:

PropagatorBuilder

public class TLEPropagatorBuilder
extends AbstractPropagatorBuilder

Builder for TLEPropagator.

Since:

6.0

Author:

Pascal Parraud, Thomas Paulet

Constructor Summary

Constructors

Constructor and Description
TLEPropagatorBuilder(TLE templateTLE, PositionAngleType positionAngleType, double positionScale, DataContext dataContext, TleGenerationAlgorithm generationAlgorithm) Build a new instance.
TLEPropagatorBuilder(TLE templateTLE, PositionAngleType positionAngleType, double positionScale, TleGenerationAlgorithm generationAlgorithm) Build a new instance.

Method Summary

Modifier and Type	Method and Description
AbstractBatchLSModel	buildLeastSquaresModel(PropagatorBuilder[] builders, List<ObservedMeasurement<?>> measurements, ParameterDriversList estimatedMeasurementsParameters, ModelObserver observer) Build a new batch least squares model.
TLEPropagator	buildPropagator(double[] normalizedParameters) Build a propagator.
TLEPropagatorBuilder	copy() Create a new instance identical to this one.
TLE	getTemplateTLE() Getter for the template TLE.

Methods inherited from class org.orekit.propagation.conversion.AbstractPropagatorBuilder

addAdditionalDerivativesProvider, addSupportedParameters, createInitialOrbit, deselectDynamicParameters, getAdditionalDerivativesProviders, getAttitudeProvider, getFrame, getInitialOrbitDate, getMu, getOrbitalParametersDrivers, getOrbitType, getPositionAngleType, getPositionScale, getPropagationParametersDrivers, getSelectedNormalizedParameters, resetOrbit, setAttitudeProvider, setParameters

Methods inherited from class java.lang.Object

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

Constructor Detail

TLEPropagatorBuilder

@DefaultDataContext
public TLEPropagatorBuilder(TLE templateTLE,
                                                PositionAngleType positionAngleType,
                                                double positionScale,
                                                TleGenerationAlgorithm generationAlgorithm)

Build a new instance. This constructor uses the default data context.

The template TLE is used as a model to create initial orbit. It defines the inertial frame, the central attraction coefficient, orbit type, satellite number, classification, .... and is also used together with the positionScale to convert from the normalized parameters used by the callers of this builder to the real orbital parameters.

Parameters:

templateTLE - reference TLE from which real orbits will be built

positionAngleType - position angle type to use

positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)

generationAlgorithm - TLE generation algorithm

Since:

12.0

See Also:

TLEPropagatorBuilder(TLE, PositionAngleType, double, DataContext, TleGenerationAlgorithm)

TLEPropagatorBuilder

public TLEPropagatorBuilder(TLE templateTLE,
                            PositionAngleType positionAngleType,
                            double positionScale,
                            DataContext dataContext,
                            TleGenerationAlgorithm generationAlgorithm)

Build a new instance.

The template TLE is used as a model to create initial orbit. It defines the inertial frame, the central attraction coefficient, orbit type, satellite number, classification, .... and is also used together with the positionScale to convert from the normalized parameters used by the callers of this builder to the real orbital parameters. The default attitude provider is aligned with the orbit's inertial frame.

Parameters:

templateTLE - reference TLE from which real orbits will be built

positionAngleType - position angle type to use

positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)

dataContext - used to access frames and time scales.

generationAlgorithm - TLE generation algorithm

Since:

12.0

Method Detail

copy

public TLEPropagatorBuilder copy()

Create a new instance identical to this one.

Returns:

new instance identical to this one

buildPropagator

public TLEPropagator buildPropagator(double[] normalizedParameters)

Build a propagator.

Parameters:

normalizedParameters - normalized values for the selected parameters

Returns:

an initialized propagator

getTemplateTLE

public TLE getTemplateTLE()

Getter for the template TLE.

Returns:

the template TLE

buildLeastSquaresModel

public AbstractBatchLSModel buildLeastSquaresModel(PropagatorBuilder[] builders,
                                                   List<ObservedMeasurement<?>> measurements,
                                                   ParameterDriversList estimatedMeasurementsParameters,
                                                   ModelObserver observer)

Build a new batch least squares model.

Parameters:

builders - builders to use for propagation

measurements - measurements

estimatedMeasurementsParameters - estimated measurements parameters

observer - observer to be notified at model calls

Returns:

a new model for the Batch Least Squares orbit determination