org.orekit.rugged.los

Class FixedRotation

java.lang.Object

org.orekit.rugged.los.FixedRotation

All Implemented Interfaces:

TimeIndependentLOSTransform

public class FixedRotation
extends Object
implements TimeIndependentLOSTransform

LOS transform based on a fixed rotation.

Author:

Luc Maisonobe

See Also:

LOSBuilder

Constructor Summary

Constructors

Constructor and Description
FixedRotation(String name, Vector3D axis, double angle) Simple constructor.

Method Summary

Modifier and Type	Method and 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

FixedRotation

public FixedRotation(String name,
                     Vector3D axis,
                     double angle)

Simple constructor.

The single parameter is the rotation angle.

Parameters:

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

axis - rotation axis

angle - rotation angle

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