Class HermiteInterpolatedAttitudeDataServer

java.lang.Object

gaiasky.util.gaia.BaseAttitudeDataServer<IAttitude>

gaiasky.util.gaia.NumericalAttitudeDataServer<IAttitude>

gaiasky.util.gaia.HermiteInterpolatedAttitudeDataServer

Direct Known Subclasses:

MslAttitudeDataServer

public abstract class HermiteInterpolatedAttitudeDataServer
extends NumericalAttitudeDataServer<IAttitude>

Field Summary

Fields

Modifier and Type	Field	Description
protected int	nT
protected double[]	qW
protected double[]	qX
protected double[]	qY
protected double[]	qZ
protected double[]	rateX
protected double[]	rateY
protected double[]	rateZ
protected long[]	tNs

Fields inherited from class NumericalAttitudeDataServer

gtis

Modifier and Type	Field	Description
protected GtiList	gtis	List of good time intervals

Fields inherited from class BaseAttitudeDataServer

initialized, initialRequestedTimeContext, nativeTimeContext, withUncertaintiesCorrelations

Modifier and Type	Field	Description
protected boolean	initialized	Some scanning laws have constants or tables for interpolation that need to be computed before the first use and recomputed after changing certain reference values.
protected TimeContext	initialRequestedTimeContext
protected TimeContext	nativeTimeContext	native and initially requested time context of the server - has to be set by the implementing class
protected boolean	withUncertaintiesCorrelations	switch to decide if attitude uncertainties and correlations should be calculated

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	HermiteInterpolatedAttitudeDataServer(long tStart, Duration tLength)	Constructor for a given start time and mission length

Method Summary

Modifier and Type	Method	Description
IAttitude	getAttitudeNative(long t)	Evaluate the attitude in the native time system of the server
abstract void	initialize()	Any numerical attitude needs to be initialized

Methods inherited from class NumericalAttitudeDataServer

getGtis, getStartTime, getStopTime, isValid

Modifier and Type	Method	Description
GtiList	getGtis()	Get the set of good time intervals for the spacecraft attitude.
long	getStartTime()
long	getStopTime()
boolean	isValid(long t)	Check if the there is a valid attitude at a given time

Methods inherited from class BaseAttitudeDataServer

getAttitude, getAttitude, getAttitude, getRefTime, isInitialized, setInitialized, setRefTime

Modifier and Type	Method	Description
IAttitude	getAttitude(long time)
IAttitude	getAttitude(Instant instant)
IAttitude	getAttitude(Date date)
long	getRefTime()
boolean	isInitialized()
void	setInitialized(boolean initialized)
void	setRefTime(long t)

Methods inherited from class Object

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

Field Details

nT

protected int nT

tNs

protected long[] tNs

qX

protected double[] qX

qY

protected double[] qY

qZ

protected double[] qZ

qW

protected double[] qW

rateX

protected double[] rateX

rateY

protected double[] rateY

rateZ

protected double[] rateZ

Constructor Details

HermiteInterpolatedAttitudeDataServer

protected HermiteInterpolatedAttitudeDataServer(long tStart,
 Duration tLength)

Constructor for a given start time and mission length

Parameters:

tStart - start time of the valid attitude interval

tLength - length of the valid attitude interval

Method Details

initialize

public abstract void initialize()
                         throws RuntimeException

Description copied from class: NumericalAttitudeDataServer

Any numerical attitude needs to be initialized

Specified by:

initialize in class NumericalAttitudeDataServer<IAttitude>

Throws:

RuntimeException - initialization fails

See Also:

• This method will compute the attitude and attitude rate at discrete points and store in the arrays tNs, qX, rateX, etc

getAttitudeNative

public IAttitude getAttitudeNative(long t)
                            throws RuntimeException

Description copied from class: BaseAttitudeDataServer

Evaluate the attitude in the native time system of the server

Specified by:

getAttitudeNative in class BaseAttitudeDataServer<IAttitude>

Parameters:

t - - the time elapsed since the epoch of J2010 in ns (TCB)

Returns:

attitude for the given time

Throws:

RuntimeException

See Also:

• BaseAttitudeDataServer.getAttitude(long)