Package org.orekit.forces

Class FixedPanel

java.lang.Object

org.orekit.forces.Panel

org.orekit.forces.FixedPanel

public class FixedPanel
extends Panel

Class representing one panel of a satellite, fixed with respect to satellite body.

It is mainly used to represent one facet of the body of the satellite.

Since:

3.0

Author:

Luc Maisonobe

Constructor Summary

Constructors

Constructor	Description
FixedPanel(Vector3D normal, double area, boolean doubleSided, double drag, double liftRatio, double absorption, double reflection)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> FieldVector3D<T>	getNormal(FieldSpacecraftState<T> state)	Get panel normal in spacecraft frame.
Vector3D	getNormal(SpacecraftState state)	Get panel normal in spacecraft frame.

Methods inherited from class org.orekit.forces.Panel

getAbsorption, getArea, getDrag, getLiftRatio, getReflection, isDoubleSided

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedPanel

public FixedPanel(Vector3D normal,
                  double area,
                  boolean doubleSided,
                  double drag,
                  double liftRatio,
                  double absorption,
                  double reflection)

Simple constructor.

As the sum of absorption coefficient, specular reflection coefficient and diffuse reflection coefficient is exactly 1, only the first two coefficients are needed here, the third one is deduced from the other ones.

Parameters:

normal - vector normal to the panel in spacecraft frame, pointing outward (will be normalized)

area - panel area in m²

doubleSided - if true, the panel is double-sided (typically solar arrays), otherwise it is the side of a box and only relevant for flux coming from its positive normal

drag - drag coefficient

liftRatio - drag lift ratio (proportion between 0 and 1 of atmosphere modecules that will experience specular reflection when hitting spacecraft instead of experiencing diffuse reflection, hence producing lift)

absorption - radiation pressure absorption coefficient (between 0 and 1)

reflection - radiation pressure specular reflection coefficient (between 0 and 1)

Method Detail

getNormal

public Vector3D getNormal(SpacecraftState state)

Get panel normal in spacecraft frame.

Specified by:

getNormal in class Panel

Parameters:

state - current spacecraft state

Returns:

panel normal in spacecraft frame

getNormal

public <T extends CalculusFieldElement<T>> FieldVector3D<T> getNormal(FieldSpacecraftState<T> state)

Get panel normal in spacecraft frame.

Specified by:

getNormal in class Panel

Type Parameters:

T - type of the field elements

Parameters:

state - current spacecraft state

Returns:

panel normal in spacecraft frame