Package org.orekit.propagation.analytical.gnss.data

Class GalileoAlmanac

java.lang.Object

org.orekit.propagation.analytical.gnss.data.GNSSOrbitalElements<GalileoAlmanac>

org.orekit.propagation.analytical.gnss.data.GalileoAlmanac

All Implemented Interfaces:

OrbitalParameters, GNSSClockElements, TimeStamped

public class GalileoAlmanac
extends GNSSOrbitalElements<GalileoAlmanac>

Class for Galileo almanac.

Since:

10.0

Author:

Bryan Cazabonne

See Also:

• "European GNSS (Galileo) Open Service, Signal In Space, Interface Control Document, Table 75"

Field Summary

Fields

Modifier and Type	Field	Description
static final double	A0	Nominal semi-major axis in meters (Ref: Galileo ICD - Table 75).
static final double	I0	Nominal inclination (Ref: Galileo ICD - Table 75).

Constructor Summary

Constructors

Constructor	Description
GalileoAlmanac(FieldGalileoAlmanac<T> original)	Constructor from field instance.
GalileoAlmanac(TimeScales timeScales, int prn, GNSSDate toe, KeplerianOrbit orbit, double aDot, double deltaN0, double deltaN0Dot, double iDot, double omegaDot, double cuc, double cus, double crc, double crs, double cic, double cis, double af0, double af1, double af2, double tgd, GNSSDate toc, int healthE5a, int healthE5b, int healthE1, int iod)	Build a new almanac.

Method Summary

Modifier and Type	Method	Description
GalileoAlmanacFactory	baseFactory(Frame inertial, Frame bodyFixed)	Factory for the orbital elements.
int	getHealthE1()	Get the E1-B/C signal health status.
int	getHealthE5a()	Get the E5a signal health status.
int	getHealthE5b()	Get the E5b signal health status.
int	getIOD()	Get the Issue of Data (IOD).
<T extends CalculusFieldElement<T>> FieldGalileoAlmanac<T>	toField(FieldKeplerianOrbit<T> orbit, T[] nonKeplerian, DoubleFunction<T> converter)	Create another field version of the instance.

Methods inherited from class org.orekit.propagation.analytical.gnss.data.GNSSOrbitalElements

factory, getADot, getAf0, getAf1, getAf2, getAngularVelocity, getCic, getCis, getCrc, getCrs, getCuc, getCus, getCycleDuration, getDate, getDeltaN0, getDeltaN0Dot, getIDot, getOmegaDot, getOrbit, getPrn, getTgd, getTimeOfClock, getTimeOfEphemeris, getTimeScales, getType, getWeeksInCycle, isCivilianMessage, toField

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.time.TimeStamped

durationFrom

Field Details

I0

public static final double I0

Nominal inclination (Ref: Galileo ICD - Table 75).

A0

public static final double A0

Nominal semi-major axis in meters (Ref: Galileo ICD - Table 75).

See Also:

• Constant Field Values

Constructor Details

GalileoAlmanac

public GalileoAlmanac(TimeScales timeScales,
 int prn,
 GNSSDate toe,
 KeplerianOrbit orbit,
 double aDot,
 double deltaN0,
 double deltaN0Dot,
 double iDot,
 double omegaDot,
 double cuc,
 double cus,
 double crc,
 double crs,
 double cic,
 double cis,
 double af0,
 double af1,
 double af2,
 double tgd,
 GNSSDate toc,
 int healthE5a,
 int healthE5b,
 int healthE1,
 int iod)

Build a new almanac.

Parameters:

timeScales - known time scales

prn - PRN number of the satellite

toe - time of ephemeris (must be consistent with orbit)

orbit - Keplerian orbit in Earth-frozen frame

aDot - change rate in semi-major axis (m/s)

deltaN0 - delta of satellite mean motion

deltaN0Dot - change rate in Δn₀

iDot - inclination rate (rad/s)

omegaDot - rate of right ascension (rad/s)

cuc - amplitude of the cosine harmonic correction term to the argument of latitude

cus - amplitude of the sine harmonic correction term to the argument of latitude

crc - amplitude of the cosine harmonic correction term to the orbit radius

crs - amplitude of the sine harmonic correction term to the orbit radius

cic - amplitude of the cosine harmonic correction term to the inclination

cis - amplitude of the sine harmonic correction term to the inclination

af0 - zero-th order clock correction (s)

af1 - first order clock correction (s/s)

af2 - second order clock correction (s/s²)

tgd - group delay differential TGD for L1-L2 correction

toc - time of clock

healthE5a - satellite E5a signal health status

healthE5b - satellite E5b signal health status

healthE1 - satellite E1-B/C signal health status

iod - issue of data

GalileoAlmanac

public GalileoAlmanac(FieldGalileoAlmanac<T> original)

Constructor from field instance.

Type Parameters:

T - type of the field elements

Parameters:

original - regular field instance

Method Details

toField

public <T extends CalculusFieldElement<T>>
FieldGalileoAlmanac<T> toField(FieldKeplerianOrbit<T> orbit,
 T[] nonKeplerian,
 DoubleFunction<T> converter)

Create another field version of the instance.

Specified by:

toField in class GNSSOrbitalElements<GalileoAlmanac>

Type Parameters:

T - type of the field elements

Parameters:

orbit - orbit in the correct gradient field

nonKeplerian - non-Keplerian parameters

converter - converter for remaining elements

Returns:

gradient version of the instance

getHealthE1

public int getHealthE1()

Get the E1-B/C signal health status.

Returns:

the E1-B/C signal health status

getHealthE5a

public int getHealthE5a()

Get the E5a signal health status.

Returns:

the E5a signal health status

getHealthE5b

public int getHealthE5b()

Get the E5b signal health status.

Returns:

the E5b signal health status

getIOD

public int getIOD()

Get the Issue of Data (IOD).

Returns:

the Issue Of Data

baseFactory

public GalileoAlmanacFactory baseFactory(Frame inertial,
 Frame bodyFixed)

Factory for the orbital elements.

Specified by:

baseFactory in class GNSSOrbitalElements<GalileoAlmanac>

Parameters:

inertial - reference inertial frame

bodyFixed - body fixed frame (will be frozen at date to build the orbital elements

Returns:

factory for the orbital elements