Package org.orekit.forces.gravity

Class LenseThirringRelativity

java.lang.Object
org.orekit.forces.gravity.LenseThirringRelativity
All Implemented Interfaces:
ForceModel, EventDetectorsProvider, ParameterDriversProvider
public class LenseThirringRelativity extends Object implements ForceModel
Lense-Thirring post-Newtonian correction force due to general relativity.

Lense-Thirring term causes a precession of the orbital plane at a rate of the order of 0.8 mas per year (geostationary) to 180 mas per year (low orbit).

Since:
10.3
Author:
Bryan Cazabonne
See Also:
  • "Petit, G. and Luzum, B. (eds.), IERS Conventions (2010), Chapter 10, General relativistic models for space-time coordinates and equations of motion (2010)"

  • Constructor Details

    • LenseThirringRelativity

      public LenseThirringRelativity(double gm, Frame bodyFrame)
      Constructor.
      Parameters:
      gm - Earth's gravitational parameter.
      bodyFrame - central body frame

  • Method Details

    • dependsOnPositionOnly

      public boolean dependsOnPositionOnly()
      Check if force model depends on position only at a given, fixed date.
      Specified by:
      dependsOnPositionOnly in interface ForceModel
      Returns:
      true if force model depends on position only, false if it depends on mass or velocity, either directly or due to a dependency on attitude

    • acceleration

      public Vector3D acceleration(SpacecraftState s, double[] parameters)
      Compute acceleration.
      Specified by:
      acceleration in interface ForceModel
      Parameters:
      s - current state information: date, kinematics, attitude
      parameters - values of the force model parameters at state date, only 1 value for each parameterDriver
      Returns:
      acceleration in same frame as state

    • acceleration

      public <T extends CalculusFieldElement<T>> FieldVector3D<T> acceleration(FieldSpacecraftState<T> s, T[] parameters)
      Compute acceleration.
      Specified by:
      acceleration in interface ForceModel
      Type Parameters:
      T - type of the elements
      Parameters:
      s - current state information: date, kinematics, attitude
      parameters - values of the force model parameters at state date, only 1 value for each parameterDriver
      Returns:
      acceleration in same frame as state

    • getParametersDrivers

      public List<ParameterDriver> getParametersDrivers()
      Get the drivers for parameters.
      Specified by:
      getParametersDrivers in interface ParameterDriversProvider
      Returns:
      drivers for parameters