Package org.orekit.utils

Class CartesianCovarianceUtils

java.lang.Object

org.orekit.utils.CartesianCovarianceUtils

public class CartesianCovarianceUtils
extends Object

Utility class for conversions related to Cartesian covariance matrices.

Since:

12.2

Author:

Romain Serra

Method Summary

Modifier and Type	Method	Description
static RealMatrix	changeReferenceFrame(Frame inputFrame, RealMatrix covarianceMatrix, AbsoluteDate date, Frame outputFrame)	Convert input position-velocity covariance matrix between reference frames.
static RealMatrix	convertFromLofType(LOFType lofType, RealMatrix covarianceMatrix, Vector3D position, Vector3D velocity)	Convert input position-velocity covariance matrix from local frame to reference one.
static RealMatrix	convertToLofType(Vector3D position, Vector3D velocity, RealMatrix covarianceMatrix, LOFType lofType)	Convert input position-velocity covariance matrix from reference frame to local one.

Methods inherited from class java.lang.Object

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

Method Detail

changeReferenceFrame

public static RealMatrix changeReferenceFrame(Frame inputFrame,
                                              RealMatrix covarianceMatrix,
                                              AbsoluteDate date,
                                              Frame outputFrame)

Convert input position-velocity covariance matrix between reference frames.

Parameters:

inputFrame - input frame

outputFrame - output frame

covarianceMatrix - position-velocity covariance matrix in reference frame

date - epoch

Returns:

converted covariance matrix

convertToLofType

public static RealMatrix convertToLofType(Vector3D position,
                                          Vector3D velocity,
                                          RealMatrix covarianceMatrix,
                                          LOFType lofType)

Convert input position-velocity covariance matrix from reference frame to local one.

Parameters:

position - position vector in reference frame

velocity - velocity vector in reference frame

covarianceMatrix - position-velocity covariance matrix in reference frame

lofType - output local orbital frame

Returns:

converted covariance matrix

convertFromLofType

public static RealMatrix convertFromLofType(LOFType lofType,
                                            RealMatrix covarianceMatrix,
                                            Vector3D position,
                                            Vector3D velocity)

Convert input position-velocity covariance matrix from local frame to reference one.

Parameters:

position - position vector in reference frame

velocity - velocity vector in reference frame

covarianceMatrix - position-velocity covariance matrix in local frame

lofType - input local orbital frame

Returns:

converted covariance matrix