fr.cnes.sirius.patrius.guidance
Class QuaternionPolynomialProfile

java.lang.Object
  fr.cnes.sirius.patrius.guidance.GuidanceProfile
      fr.cnes.sirius.patrius.guidance.QuaternionPolynomialProfile

All Implemented Interfaces:

Serializable, AttitudeLeg, AttitudeProvider

public final class QuaternionPolynomialProfile
extends GuidanceProfile

Represents a quaternion guidance profile, calculated with polynomial functions

Since:

1.3

Version:

$Id: QuaternionPolynomialProfile.java 15520 2016-03-07 13:25:06Z bignon $

Author:

Tiziana Sabatini

See Also:

Serialized Form

Concurrency :

conditionally thread-safe

Concurrency comment :

thread-safe if the attributes are thread-safe

Constructor Summary

QuaternionPolynomialProfile(Frame frame, AbsoluteDateInterval timeInterval, List<QuaternionPolynomialSegment> polynomials)
Create a polynomial, quaternion guidance profile.

Method Summary

Attitude	getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the attitude corresponding to an orbital state.
Map<AbsoluteDateInterval,double[]>	getQ0Coefficients()
Map<AbsoluteDateInterval,double[]>	getQ1Coefficients()
Map<AbsoluteDateInterval,double[]>	getQ2Coefficients()
Map<AbsoluteDateInterval,double[]>	getQ3Coefficients()
void	setSpinDerivativesComputation(boolean computeSpinDerivatives) Method to activate spin derivative computation.

Methods inherited from class fr.cnes.sirius.patrius.guidance.GuidanceProfile

checkDate, getAttitude, getTimeInterval

Methods inherited from class java.lang.Object

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

Constructor Detail

QuaternionPolynomialProfile

public QuaternionPolynomialProfile(Frame frame,
                                   AbsoluteDateInterval timeInterval,
                                   List<QuaternionPolynomialSegment> polynomials)

Create a polynomial, quaternion guidance profile.

Parameters:

frame - the reference frame of the polynomial functions

timeInterval - interval of validity of the guidance profile

polynomials - the list of polynomial guidance profile segments

Method Detail

getQ0Coefficients

public Map<AbsoluteDateInterval,double[]> getQ0Coefficients()

Returns:

the map containing the coefficients of the polynomial function representing q0, and their time interval of validity.

getQ1Coefficients

public Map<AbsoluteDateInterval,double[]> getQ1Coefficients()

Returns:

the map containing the coefficients of the polynomial function representing q1, and their time interval of validity.

getQ2Coefficients

public Map<AbsoluteDateInterval,double[]> getQ2Coefficients()

Returns:

the map containing the coefficients of the polynomial function representing q2, and their time interval of validity.

getQ3Coefficients

public Map<AbsoluteDateInterval,double[]> getQ3Coefficients()

Returns:

the map containing the coefficients of the polynomial function representing q3, and their time interval of validity.

getAttitude

public Attitude getAttitude(PVCoordinatesProvider pvProv,
                            AbsoluteDate date,
                            Frame frame)
                     throws OrekitException

Compute the attitude corresponding to an orbital state.

Parameters:

pvProv - local position-velocity provider around current date

date - current date

frame - reference frame from which attitude is computed

Returns:

attitude attitude on the specified date and position-velocity state

Throws:

OrekitException - if attitude cannot be computed

setSpinDerivativesComputation

public void setSpinDerivativesComputation(boolean computeSpinDerivatives)
                                   throws OrekitException

Method to activate spin derivative computation.

Parameters:

computeSpinDerivatives - true if spin derivatives should be computed

Throws:

OrekitException - if spin derivatives can not be computed