Package org.orekit.rugged.los

Class FixedZHomothety

java.lang.Object

org.orekit.rugged.los.FixedZHomothety

All Implemented Interfaces:

TimeIndependentLOSTransform

public class FixedZHomothety
extends Object
implements TimeIndependentLOSTransform

LOS transform based on a homothety along the Z axis.

Since:

2.0

Author:

Lucie Labatallee, Guylaine Prat

See Also:

LOSBuilder

Constructor Summary

Constructors

Constructor	Description
FixedZHomothety(String name, double factorvalue)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
Stream<ParameterDriver>	getParametersDrivers()	Get the drivers for LOS parameters.
<T extends Derivative<T>> FieldVector3D<T>	transformLOS(int i, FieldVector3D<T> los, DerivativeGenerator<T> generator)	Transform a line-of-sight and its partial derivatives.
Vector3D	transformLOS(int i, Vector3D los)	Transform a line-of-sight.

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedZHomothety

public FixedZHomothety(String name,
                       double factorvalue)

Simple constructor.

The single parameter is the homothety factor.

Parameters:

name - name of the homothety (used for estimated parameters identification)

factorvalue - homothety factor

Method Detail

getParametersDrivers

public Stream<ParameterDriver> getParametersDrivers()

Get the drivers for LOS parameters.

Specified by:

getParametersDrivers in interface TimeIndependentLOSTransform

Returns:

drivers for LOS parameters

transformLOS

public Vector3D transformLOS(int i,
                             Vector3D los)

Transform a line-of-sight.

Specified by:

transformLOS in interface TimeIndependentLOSTransform

Parameters:

i - los pixel index

los - line-of-sight to transform

Returns:

transformed line-of-sight

transformLOS

public <T extends Derivative<T>> FieldVector3D<T> transformLOS(int i,
                                                               FieldVector3D<T> los,
                                                               DerivativeGenerator<T> generator)

Transform a line-of-sight and its partial derivatives.

This method is used for LOS calibration purposes. It allows to compute the Jacobian matrix of the LOS with respect to the parameters, which are typically polynomials coefficients representing rotation angles. These polynomials can be used for example to model thermo-elastic effects.

Note that in order for the partial derivatives to be properly set up, the setSelected method must have been set to true for the various parameters returned by TimeIndependentLOSTransform.getParametersDrivers() that should be estimated.

Specified by:

transformLOS in interface TimeIndependentLOSTransform

Type Parameters:

T - derivative type

Parameters:

i - los pixel index

los - line-of-sight to transform

generator - generator to use for building Derivative instances

Returns:

line of sight, and its first partial derivatives with respect to the parameters