org.orekit.propagation.semianalytical.dsst.forces

Class DSSTAtmosphericDrag

java.lang.Object

org.orekit.propagation.semianalytical.dsst.forces.AbstractGaussianContribution

org.orekit.propagation.semianalytical.dsst.forces.DSSTAtmosphericDrag

All Implemented Interfaces:

DSSTForceModel

public class DSSTAtmosphericDrag
extends AbstractGaussianContribution

Atmospheric drag contribution to the DSSTPropagator.

The drag acceleration is computed through the acceleration model of DragForce.

Author:

Pascal Parraud

Field Summary

Fields inherited from class org.orekit.propagation.semianalytical.dsst.forces.AbstractGaussianContribution

a, A, B, C, co2AB, ecc, f, g, h, k, lm, mu, n, ooA, ooAB, ooBpo, ooMu, p, q, ton2a, w

Constructor Summary

Constructors

Constructor and Description
DSSTAtmosphericDrag(Atmosphere atmosphere, double cd, double area) Simple constructor assuming spherical spacecraft.
DSSTAtmosphericDrag(Atmosphere atmosphere, DragSensitive spacecraft) Simple constructor with custom spacecraft.

Method Summary

Modifier and Type	Method and Description
Atmosphere	getAtmosphere() Get the atmospheric model.
EventDetector[]	getEventsDetectors() Get the discrete events related to the model.
protected double[]	getLLimits(SpacecraftState state) Compute the limits in L, the true longitude, for integration.
double	getRbar() Get the critical distance.
DragSensitive	getSpacecraft() Get spacecraft shape.

Methods inherited from class org.orekit.propagation.semianalytical.dsst.forces.AbstractGaussianContribution

getAcceleration, getMeanElementRate, initialize, initializeStep, registerAttitudeProvider, updateShortPeriodTerms

Methods inherited from class java.lang.Object

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

Constructor Detail

DSSTAtmosphericDrag

public DSSTAtmosphericDrag(Atmosphere atmosphere,
                           double cd,
                           double area)

Simple constructor assuming spherical spacecraft.

Parameters:

atmosphere - atmospheric model

cd - drag coefficient

area - cross sectionnal area of satellite

DSSTAtmosphericDrag

public DSSTAtmosphericDrag(Atmosphere atmosphere,
                           DragSensitive spacecraft)

Simple constructor with custom spacecraft.

Parameters:

atmosphere - atmospheric model

spacecraft - spacecraft model

Method Detail

getAtmosphere

public Atmosphere getAtmosphere()

Get the atmospheric model.

Returns:

atmosphere model

getRbar

public double getRbar()

Get the critical distance.

The critical distance from the center of the central body aims at defining the atmosphere entry/exit.

Returns:

the critical distance from the center of the central body (m)

getEventsDetectors

public EventDetector[] getEventsDetectors()

Get the discrete events related to the model.

Returns:

array of events detectors or null if the model is not related to any discrete events

getLLimits

protected double[] getLLimits(SpacecraftState state)
                       throws OrekitException

Compute the limits in L, the true longitude, for integration.

Specified by:

getLLimits in class AbstractGaussianContribution

Parameters:

state - current state information: date, kinematics, attitude

Returns:

the integration limits in L

Throws:

OrekitException - if some specific error occurs

getSpacecraft

public DragSensitive getSpacecraft()

Get spacecraft shape.

Returns:

spacecraft shape