fr.cnes.sirius.patrius.forces.atmospheres

Class SimpleExponentialAtmosphere

java.lang.Object

fr.cnes.sirius.patrius.forces.atmospheres.SimpleExponentialAtmosphere

All Implemented Interfaces:

Atmosphere, Serializable

public class SimpleExponentialAtmosphere
extends Object
implements Atmosphere

Simple exponential atmospheric model.

This model represents a simple atmosphere with an exponential density and rigidly bound to the underlying rotating body.

Author:

Fabien Maussion, Luc Maisonobe

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SimpleExponentialAtmosphere(BodyShape shapeIn, double rho0In, double h0In, double hscaleIn) Create an exponential atmosphere.

Method Summary

Methods

Modifier and Type	Method and Description
double	getDensity(AbsoluteDate date, Vector3D position, Frame frame) Get the local density.
double	getSpeedOfSound(AbsoluteDate date, Vector3D position, Frame frame) Get the local speed of sound.
Vector3D	getVelocity(AbsoluteDate date, Vector3D position, Frame frame) Get the spacecraft velocity relative to the atmosphere.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleExponentialAtmosphere

public SimpleExponentialAtmosphere(BodyShape shapeIn,
                           double rho0In,
                           double h0In,
                           double hscaleIn)

Create an exponential atmosphere.

Parameters:

shapeIn - body shape model

rho0In - Density at the altitude h0

h0In - Altitude of reference (m)

hscaleIn - Scale factor (m)

Method Detail

getDensity

public double getDensity(AbsoluteDate date,
                Vector3D position,
                Frame frame)
                  throws PatriusException

Get the local density.

Specified by:

getDensity in interface Atmosphere

Parameters:

date - current date

position - current position in frame

frame - the frame in which is defined the position

Returns:

local density (kg/m³)

Throws:

PatriusException - if date is out of range of solar activity model or if some frame conversion cannot be performed

getVelocity

public Vector3D getVelocity(AbsoluteDate date,
                   Vector3D position,
                   Frame frame)
                     throws PatriusException

Get the spacecraft velocity relative to the atmosphere.

Specified by:

getVelocity in interface Atmosphere

Parameters:

date - current date

position - current position in frame

frame - the frame in which is defined the position

Returns:

velocity (m/s) (defined in the same frame as the position)

Throws:

PatriusException - if some conversion cannot be performed

getSpeedOfSound

public double getSpeedOfSound(AbsoluteDate date,
                     Vector3D position,
                     Frame frame)
                       throws PatriusException

Get the local speed of sound.

Specified by:

getSpeedOfSound in interface Atmosphere

Parameters:

date - current date

position - current position in frame

frame - the frame in which is defined the position

Returns:

speed of sound (m/s)

Throws:

PatriusException - if some conversion cannot be performed