fr.cnes.sirius.patrius.orbits.pvcoordinates

Class GPSAlmanacParameters

java.lang.Object

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

fr.cnes.sirius.patrius.orbits.pvcoordinates.GPSAlmanacParameters

public class GPSAlmanacParameters
extends AlmanacParameter

This class is a simple container for GPS almanac parameters.

Since:

3.2

Version:

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

Author:

galpint

Concurrency :

immutable

Field Summary

Fields

Modifier and Type	Field and Description
static int	ROLL_OVER_WEEK_GPS Roll-over week number for GPS parameters.

Constructor Summary

Constructors

Constructor and Description
GPSAlmanacParameters(double refDuration, int week, double m0, double e, double squareRootA, double omega0, double i0, double w0, double rateRa) Creates an instance of GPS Almanac parameters.

Method Summary

Modifier and Type	Method and Description
AbsoluteDate	getDate(int weekNumber, double milliInWeek) Returns GNSS date given a week number and second in the week.
int	getRolloverWeeks() Returns almanach unambiguous week number.

Methods inherited from class fr.cnes.sirius.patrius.orbits.pvcoordinates.AlmanacParameter

getEccentricity, getI, getMeanAnomalyInit, getOmegaInit, getOmegaRate, getSqrtA, gettRef, getW, getWeekRef

Methods inherited from class java.lang.Object

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

Field Detail

ROLL_OVER_WEEK_GPS

public static final int ROLL_OVER_WEEK_GPS

Roll-over week number for GPS parameters.

See Also:

Constant Field Values

Constructor Detail

GPSAlmanacParameters

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

Creates an instance of GPS Almanac parameters.

Parameters:

refDuration - time applicability of GPS almanac

week - week of the GPS 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

Method Detail

getRolloverWeeks

public int getRolloverWeeks()

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

Specified by:

getRolloverWeeks in class AlmanacParameter

Returns:

the roll-over week number

getDate

public AbsoluteDate getDate(int weekNumber,
                            double milliInWeek)

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

Specified by:

getDate in class AlmanacParameter

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