org.orekit.forces.drag

Class SimpleExponentialAtmosphere

java.lang.Object

org.orekit.forces.drag.SimpleExponentialAtmosphere

All Implemented Interfaces:

Serializable, Atmosphere

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 shape, double rho0, double h0, double hscale) 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.
Frame	getFrame() Get the frame of the central body.
Vector3D	getVelocity(AbsoluteDate date, Vector3D position, Frame frame) Get the inertial velocity of atmosphere molecules.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleExponentialAtmosphere

public SimpleExponentialAtmosphere(BodyShape shape,
                           double rho0,
                           double h0,
                           double hscale)

Create an exponential atmosphere.

Parameters:

shape - body shape model

rho0 - Density at the altitude h0

h0 - Altitude of reference (m)

hscale - Scale factor

Method Detail

getFrame

public Frame getFrame()

Get the frame of the central body.

Specified by:

getFrame in interface Atmosphere

Returns:

frame of the central body.

getDensity

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

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:

OrekitException - 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 OrekitException

Get the inertial velocity of atmosphere molecules.

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:

OrekitException - if some conversion cannot be performed