STK Components for .NET 2020 r2

## GaussJacksonIntegrator Class |

A multi-step second order integrator based on the Gauss-Jackson integration algorithm, using
a RungeKuttaFehlberg78Integrator to start the integration and a summed Adams first order integration algorithm.

Inheritance Hierarchy

SystemObject

AGI.Foundation.NumericalMethodsNumericalIntegrator

AGI.Foundation.NumericalMethods.AdvancedMultipleStepIntegrator

AGI.Foundation.NumericalMethodsGaussJacksonIntegrator

AGI.Foundation.NumericalMethodsNumericalIntegrator

AGI.Foundation.NumericalMethods.AdvancedMultipleStepIntegrator

AGI.Foundation.NumericalMethodsGaussJacksonIntegrator

Syntax

The GaussJacksonIntegrator type exposes the following members.

Constructors

Name | Description | |
---|---|---|

GaussJacksonIntegrator | Initializes a new instance. | |

GaussJacksonIntegrator(GaussJacksonIntegrator, CopyContext) | Initializes a new instance as a copy of an existing instance. |

Properties

Name | Description | |
---|---|---|

CurrentStepSize |
Gets the current (positive) size of the step which the integrator will use for the next integration step.
(Overrides NumericalIntegratorCurrentStepSize.) | |

Dimension |
Gets the number of dependent variables based on the
Dimension of the SystemOfEquations.
(Inherited from NumericalIntegrator.) | |

Direction |
Gets or sets whether to integrate forward, increasing the independent variable, or backward,
decreasing the independent variable.
(Inherited from NumericalIntegrator.) | |

FinalDependentVariableValues |
Gets or sets the values of the dependent variables resulting from the last integration step.
(Inherited from NumericalIntegrator.) | |

FinalIndependentVariableValue |
Gets or sets the value of the independent variable after an integration step.
(Inherited from NumericalIntegrator.) | |

InitialDependentVariableValues |
Gets or sets the values of the dependent variables prior to an integration step.
These values will be updated to the previous FinalDependentVariableValues
at the beginning of each integration step.
(Inherited from NumericalIntegrator.) | |

InitialIndependentVariableValue |
Gets or sets the value of the independent variable prior to an integration step.
(Inherited from NumericalIntegrator.) | |

InitialStepSize |
Gets or sets the initial (positive) size of the step to add to the InitialIndependentVariableValue
when performing an integration. By default, the initial value is one.
(Inherited from NumericalIntegrator.) | |

IsThreadSafe |
Gets a value indicating whether the methods on this instance are safe to call from
multiple threads simultaneously.
(Inherited from NumericalIntegrator.) | |

PreviousStepSize |
Gets the size of the last step taken by the integrator. This returns the difference between the
FinalIndependentVariableValue and the InitialIndependentVariableValue.
(Inherited from NumericalIntegrator.) | |

StepSizeInformation |
Gets or sets a value indicating whether the CurrentStepSize was changed from the InitialStepSize
and, if so, the nature of how it was changed.
(Inherited from NumericalIntegrator.) | |

SystemOfEquations |
Gets or sets the system of differential equations corresponding to the derivatives of the
dependent variables.
(Inherited from NumericalIntegrator.) |

Methods

Name | Description | |
---|---|---|

Clone |
Create a copy of this integrator.
(Overrides NumericalIntegratorClone(CopyContext).) | |

Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) | |

Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |

GetHashCode | Serves as the default hash function. (Inherited from Object.) | |

GetType | Gets the Type of the current instance. (Inherited from Object.) | |

Initialize |
Initialize the integrator's initial independent and dependent variables and reset the integration parameters.
This should be called by the user prior to performing the first integration step.
(Overrides NumericalIntegratorInitialize(Double, Double).) | |

Integrate |
Perform an integration step moving the independent and dependent variables from their
initial (the final values of the previous step) to their new final values,
using the CurrentStepSize.
(Overrides NumericalIntegratorIntegrate.)When overriding this method, StartNextStep should be called prior to integration. | |

Integrate(Double) |
Perform an integration step moving the independent and dependent variables from their
initial (the final values of the previous step) to their new final values.
(Overrides NumericalIntegratorIntegrate(Double).)When overriding this method, StartNextStep should be called prior to integration. Also note that the CurrentStepSize property should be unaffected by the stepSize parameter. | |

MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |

Reintegrate |
Repeats the last integration of the differential equations.
(Overrides NumericalIntegratorReintegrate(Double).)When overriding this method, note that the CurrentStepSize property should be unaffected by the stepSize parameter. | |

StartNextStep |
This performs the task of setting the Initial values to the previous Final values prior to taking the next step.
This method is called prior to integrating the step but not called during reintegration.
(Overrides NumericalIntegratorStartNextStep.) | |

ToString | Returns a string that represents the current object. (Inherited from Object.) | |

UpdateSavedDerivatives |
This method is used in order to update the last step's derivatives with any post integration corrections.
(Overrides MultipleStepIntegratorUpdateSavedDerivatives(Double).) |

Remarks

For more detailed information, see: "Implementation of Gauss-Jackson Integration for Orbit Propagation."
Berry, Matthew M. and Liam M. Healy. The Journal of the Astronautical Sciences, Vol. 52, No. 3, July-September 2004, pp. 331-357.

See Also