Package org.orekit.rugged.los

Interface TimeDependentLOS

public interface TimeDependentLOS

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

Author:

Luc Maisonobe

See Also:

LineSensor

Method Summary

Modifier and Type	Method	Description
Vector3D	getLOS(int index, AbsoluteDate date)	Get the line of sight for a given date.
<T extends Derivative<T>> FieldVector3D<T>	getLOSDerivatives(int index, AbsoluteDate date, DerivativeGenerator<T> generator)	Get the line of sight and its partial derivatives for a given date.
int	getNbPixels()	Get the number of pixels.
Stream<ParameterDriver>	getParametersDrivers()	Get the drivers for LOS parameters.

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

getLOSDerivatives

<T extends Derivative<T>> FieldVector3D<T> getLOSDerivatives(int index,
                                                             AbsoluteDate date,
                                                             DerivativeGenerator<T> generator)

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 estimated 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 getParametersDrivers() that should be estimated.

Type Parameters:

T - derivative type

Parameters:

index - los pixel index

date - date

generator - generator to use for building Derivative instances

Returns:

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

Since:

2.0

getParametersDrivers

Stream<ParameterDriver> getParametersDrivers()

Get the drivers for LOS parameters.

Returns:

drivers for LOS parameters

Since:

2.0