fr.cnes.sirius.patrius.orbits.pvcoordinates

Class AlmanacParameter

java.lang.Object

fr.cnes.sirius.patrius.orbits.pvcoordinates.AlmanacParameter

Direct Known Subclasses:

GalileoAlmanacParameters, GPSAlmanacParameters

public abstract class AlmanacParameter
extends Object

This class is a simple container for generic almanac parameters.

Since:

3.1

Version:

$Id: AlmanacParameter.java 17584 2017-05-10 13:26:39Z bignon $

Author:

chabaudp

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
AlmanacParameter(double refDuration, int week, double m0, double e, double squareRootA, double omega0, double i0, double w0, double rateRa) Creates an instance of AlmanacParameter

Method Summary

Modifier and Type	Method and Description
abstract AbsoluteDate	getDate(int weekNumber, double milliInWeek) Returns GNSS date given a week number and second in the week.
double	getEccentricity()
double	getI()
double	getMeanAnomalyInit()
double	getOmegaInit()
double	getOmegaRate()
abstract int	getRolloverWeeks() Returns almanach unambiguous week number.
double	getSqrtA()
double	gettRef()
double	getW()
int	getWeekRef()

Methods inherited from class java.lang.Object

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

Constructor Detail

AlmanacParameter

public AlmanacParameter(double refDuration,
                        int week,
                        double m0,
                        double e,
                        double squareRootA,
                        double omega0,
                        double i0,
                        double w0,
                        double rateRa)

Creates an instance of AlmanacParameter

Parameters:

refDuration - time applicability of the almanac

week - week of the almanac

m0 - Initial Mean anomaly

e - Eccentricity

squareRootA - Semi major axis square root

omega0 - Initial Right ascencion

i0 - Orbital inclination

w0 - Argument of perigee

rateRa - Rate of right ascension

Since:

3.1

Method Detail

getMeanAnomalyInit

public double getMeanAnomalyInit()

Returns:

the initial mean anomaly

getEccentricity

public double getEccentricity()

Returns:

the eccentricity

getSqrtA

public double getSqrtA()

Returns:

the square root of the semi-major axis

getOmegaInit

public double getOmegaInit()

Returns:

the initial right ascension of ascending node

getI

public double getI()

Returns:

the orbital inclination

getW

public double getW()

Returns:

the Argument of perigee

getOmegaRate

public double getOmegaRate()

Returns:

the Rate of right ascension

getWeekRef

public int getWeekRef()

Returns:

the week number

gettRef

public double gettRef()

Returns:

the number of seconds in the week

getRolloverWeeks

public abstract int getRolloverWeeks()

Returns almanach unambiguous week number. Example: GPS week is coded over 10 Bytes => 1024 possibles weeks. Hence 1024 is returned.

Returns:

the roll-over week number

getDate

public abstract AbsoluteDate getDate(int weekNumber,
                                     double milliInWeek)
                              throws PatriusException

Returns GNSS date given a week number and second in the week.

Parameters:

weekNumber - week number taking roll-over into account

milliInWeek - millisecond in week

Returns:

GNSS date given a week number and milliseconds in the week

Throws:

PatriusException - if UTC data can't be load