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: Squaring.java 12468 2015-03-04 09:16:38Z bignon $

Author:

Tiziana Sabatini

Concurrency :

immutable

Method Summary

static 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 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

Method Detail

simpsonMean

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

Simpson's rule.

Parameters:

y - function values

Returns:

simpson's mean of y.

Throws:

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

simpsonMean

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

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:

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

computeSquaringPoints

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

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:

OrekitException - thrown if number of points is not odd

getSquaringJDCNES

public static AbsoluteDate[] getSquaringJDCNES()

Returns:

the squaringJDCNES

computeSquaringPointsEccentric

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

Computation of squaring points equally distributed according to eccentric anomaly.

Parameters:

numPoints - number of squaring points

orbit - an orbit

Returns:

squaring points

Throws:

OrekitException - thrown if number of points is not odd