fr.cnes.sirius.patrius.stela.forces

Class Squaring

java.lang.Object

fr.cnes.sirius.patrius.stela.forces.Squaring

public final class Squaring
extends Object

Class containing methods used to compute Simpson's quadrature.

Since:

1.3

Version:

$Id$

Author:

Tiziana Sabatini

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
Squaring()

Method Summary

Modifier and Type	Method and Description
double[][]	computeSquaringPoints(int numPoints, StelaEquinoctialOrbit orbit, double startPoint, double endPoint) Computation of squaring points equally distributed according to true anomaly.
static StelaEquinoctialOrbit[]	computeSquaringPointsEccentric(int numPoints, StelaEquinoctialOrbit orbit) Computation of squaring points equally distributed according to eccentric anomaly.
static List<double[]>	computeSquaringPointsEccentric2(int numPoints, StelaEquinoctialOrbit orbit, double startPoint, double endPoint) Computation of squaring points equally distributed according to eccentric anomaly between start point and end point.
AbsoluteDate[]	getSquaringJDCNES()
static double	simpsonMean(double[] y) Simpson's rule.
static double	simpsonMean(double[] y, double deltaEi) Simpson's rule when the integration is not done on the entire orbit, but only on one specific part.

Methods inherited from class java.lang.Object

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

Constructor Detail

Squaring

public Squaring()

Method Detail

simpsonMean

public static double simpsonMean(double[] y)
                          throws PatriusException

Simpson's rule.

Parameters:

y - function values

Returns:

simpson's mean of y.

Throws:

PatriusException - exception raised if number of intervals for Simpson's Rule is not even.

simpsonMean

public static double simpsonMean(double[] y,
                                 double deltaEi)
                          throws PatriusException

Simpson's rule when the integration is not done on the entire orbit, but only on one specific part.

Parameters:

y - function values

deltaEi - interval length in eccentric anomaly

Returns:

simpson's mean of y.

Throws:

PatriusException - exception raised if number of intervals for Simpson's Rule is not even.

computeSquaringPoints

public double[][] computeSquaringPoints(int numPoints,
                                        StelaEquinoctialOrbit orbit,
                                        double startPoint,
                                        double endPoint)
                                 throws PatriusException

Computation of squaring points equally distributed according to true anomaly.

Parameters:

numPoints - number of squaring points

orbit - an orbit

startPoint - starting true anomaly of the considered part of the orbit

endPoint - ending true anomaly of the considered part of the orbit

Returns:

squaring points

Throws:

PatriusException - thrown if number of points is not odd

getSquaringJDCNES

public AbsoluteDate[] getSquaringJDCNES()

Returns:

the squaringJDCNES

computeSquaringPointsEccentric

public static StelaEquinoctialOrbit[] computeSquaringPointsEccentric(int numPoints,
                                                                     StelaEquinoctialOrbit orbit)
                                                              throws PatriusException

Computation of squaring points equally distributed according to eccentric anomaly.

Parameters:

numPoints - number of squaring points

orbit - an orbit

Returns:

squaring points

Throws:

PatriusException - thrown if number of points is not odd

computeSquaringPointsEccentric2

public static List<double[]> computeSquaringPointsEccentric2(int numPoints,
                                                             StelaEquinoctialOrbit orbit,
                                                             double startPoint,
                                                             double endPoint)
                                                      throws PatriusException

Computation of squaring points equally distributed according to eccentric anomaly between start point and end point.

Parameters:

numPoints - number of squaring points

orbit - an orbit

startPoint - starting true anomaly of the considered part of the orbit

endPoint - ending true anomaly of the considered part of the orbit

Returns:

squaring points {date, eccentric anomaly, mean anomaly}

Throws:

PatriusException - thrown if number of points is not odd