org.orekit.forces.drag
Interface DragSensitive

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

BoxAndSolarArraySpacecraft, SphericalSpacecraft

public interface DragSensitive
extends java.io.Serializable

Interface for spacecraft that are sensitive to atmospheric drag forces.

Version:

$Revision: 3197 $ $Date: 2010-04-28 10:39:09 +0200 (mer. 28 avril 2010) $

Author:

Luc Maisonobe, Pascal Parraud

See Also:

DragForce

Method Summary

org.apache.commons.math.geometry.Vector3D	dragAcceleration(SpacecraftState state, double density, org.apache.commons.math.geometry.Vector3D relativeVelocity) Compute the acceleration due to drag.
double	getDragCoefficient() Get the drag coefficient.
void	setDragCoefficient(double value) Set the drag coefficient.

Method Detail

dragAcceleration

org.apache.commons.math.geometry.Vector3D dragAcceleration(SpacecraftState state,
                                                           double density,
                                                           org.apache.commons.math.geometry.Vector3D relativeVelocity)
                                                           throws OrekitException

Compute the acceleration due to drag.

The computation includes all spacecraft specific characteristics like shape, area and coefficients.

Parameters:

state - current state information: date, kinematics, attitude

density - atmospheric density at spacecraft position

relativeVelocity - relative velocity of atmosphere with respect to spacecraft, in the same inertial frame as spacecraft orbit (m/s)

Returns:

spacecraft acceleration in the same inertial frame as spacecraft orbit (m/s²)

Throws:

OrekitException - if acceleration cannot be computed

setDragCoefficient

void setDragCoefficient(double value)

Set the drag coefficient.

Parameters:

value - drag coefficient

getDragCoefficient

double getDragCoefficient()

Get the drag coefficient.

Returns:

drag coefficient