org.orekit.rugged.los

Interface TimeDependentLOS

All Superinterfaces:

ParametricModel

public interface TimeDependentLOS
extends ParametricModel

Interface representing a line-of-sight which depends on time.

Author:

Luc Maisonobe

See Also:

LineSensor

Method Summary

Methods

Modifier and Type	Method and Description
Vector3D	getLOS(int index, AbsoluteDate date) Get the line of sight for a given date.
FieldVector3D<DerivativeStructure>	getLOS(int index, AbsoluteDate date, double[] parameters) Get the line of sight and its partial derivatives for a given date.
int	getNbPixels() Get the number of pixels.

Methods inherited from interface org.orekit.rugged.utils.ParametricModel

getEstimatedParameters, getNbEstimatedParameters, setEstimatedParameters

Method Detail

getNbPixels

int getNbPixels()

Get the number of pixels.

Returns:

number of pixels

getLOS

Vector3D getLOS(int index,
              AbsoluteDate date)

Get the line of sight for a given date.

Parameters:

index - los pixel index

date - date

Returns:

line of sight

getLOS

FieldVector3D<DerivativeStructure> getLOS(int index,
                                        AbsoluteDate date,
                                        double[] parameters)

Get the line of sight and its partial derivatives for a given date.

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 setEstimatedParameters must have been called at least once before this method and its start parameter will be used to ensure the partial derivatives are ordered in the same way in the returned vector as they were in the set parameters.

Parameters:

index - los pixel index

date - date

parameters - current estimate of the adjusted parameters

Returns:

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