fr.cnes.sirius.patrius.stela.forces.drag

Class StelaCd

java.lang.Object

fr.cnes.sirius.patrius.stela.forces.drag.StelaCd

public final class StelaCd
extends Object

This class represent a drag coefficient model.

Since:

2.0

Version:

$Id$

Author:

Cedric Dental

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
StelaCd(double inCd) Simple constructor for a constant Cd.
StelaCd(Map<Double,Double> inCd, double rEq, double f) Constructor for a Cd model depending on spacecraft altitude.

Method Summary

Modifier and Type	Method and Description
double	getCd(Vector3D position) Compute the value of the Cd coefficient depending on spacecraft altitude.

Methods inherited from class java.lang.Object

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

Constructor Detail

StelaCd

public StelaCd(double inCd)

Simple constructor for a constant Cd.

Parameters:

inCd - the constant value of the cd

StelaCd

public StelaCd(Map<Double,Double> inCd,
               double rEq,
               double f)

Constructor for a Cd model depending on spacecraft altitude.

Parameters:

inCd - the map containing the Cd value with respect to the geodetic altitude of the spacecraft

rEq - the Earth radius

f - the Earth flattening

Method Detail

getCd

public double getCd(Vector3D position)
             throws PatriusException

Compute the value of the Cd coefficient depending on spacecraft altitude.

Parameters:

position - the spacecraft position in the inertial frame

Returns:

the value of the drag coefficient

Throws:

PatriusException - if error while computing geodetic altitude