Package org.orekit.forces

Class Panel

java.lang.Object
org.orekit.forces.Panel
Direct Known Subclasses:
FixedPanel, PointingPanel, SlewingPanel
public abstract class Panel extends Object
Base class representing one panel of a satellite.
Since:
3.0
Author:
Luc Maisonobe
See Also:

  • Constructor Details

    • Panel

      protected Panel(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:
      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 Details

    • getArea

      public double getArea()
      Get panel area.
      Returns:
      panel area

    • isDoubleSided

      public boolean isDoubleSided()
      Check if the panel is double-sided (typically solar arrays).
      Returns:
      true if panel is double-sided

    • getDrag

      public double getDrag()
      Get drag coefficient.
      Returns:
      drag coefficient

    • getLiftRatio

      public double getLiftRatio()
      Get drag lift ratio.
      Returns:
      drag lift ratio

    • getAbsorption

      public double getAbsorption()
      Get radiation pressure absorption coefficient.
      Returns:
      radiation pressure absorption coefficient

    • getReflection

      public double getReflection()
      Get radiation pressure specular reflection coefficient.
      Returns:
      radiation pressure specular reflection coefficient

    • getNormal

      public abstract Vector3D getNormal(SpacecraftState state)
      Get panel normal in spacecraft frame.
      Parameters:
      state - current spacecraft state
      Returns:
      panel normal in spacecraft frame

    • getNormal

      public abstract <T extends CalculusFieldElement<T>> FieldVector3D<T> getNormal(FieldSpacecraftState<T> state)
      Get panel normal in spacecraft frame.
      Type Parameters:
      T - type of the field elements
      Parameters:
      state - current spacecraft state
      Returns:
      panel normal in spacecraft frame