Package org.orekit.propagation.conversion

Class OsculatingToMeanElementsConverter

java.lang.Object

org.orekit.propagation.conversion.OsculatingToMeanElementsConverter

public class OsculatingToMeanElementsConverter
extends Object

This class converts osculating orbital elements into mean elements.

As this process depends on the force models used to average the orbit, a Propagator is given as input. The force models used will be those contained into the propagator. This propagator must support its initial state to be reset, and this initial state must represent some mean value. This implies that this method will not work with TLE propagators because their initial state cannot be reset, and it won't work either with Eckstein-Hechler propagator as their initial state is osculating and not mean. As of 6.0, this works mainly for DSST propagator.

Author:

rdicosta, Pascal Parraud

Constructor Summary

Constructors

Constructor	Description
OsculatingToMeanElementsConverter(SpacecraftState state, int satelliteRevolution, Propagator propagator, double positionScale)	Constructor.

Method Summary

Modifier and Type	Method	Description
SpacecraftState	convert()	Convert an osculating orbit into a mean orbit, in DSST sense.

Methods inherited from class java.lang.Object

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

Constructor Detail

OsculatingToMeanElementsConverter

public OsculatingToMeanElementsConverter(SpacecraftState state,
                                         int satelliteRevolution,
                                         Propagator propagator,
                                         double positionScale)

Constructor.

Parameters:

state - initial orbit to convert

satelliteRevolution - number of satellite revolutions in the averaging interval

propagator - propagator used to compute mean orbit

positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)

Method Detail

convert

public final SpacecraftState convert()
                              throws OrekitException

Convert an osculating orbit into a mean orbit, in DSST sense.

Returns:

mean orbit state, in DSST sense

Throws:

OrekitException - if state cannot be propagated throughout range