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

Class GPSAlmanac

java.lang.Object

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

org.orekit.propagation.analytical.gnss.data.GPSAlmanac

All Implemented Interfaces:

OrbitalParameters, GNSSClockElements, TimeStamped

public class GPSAlmanac
extends GNSSOrbitalElements<GPSAlmanac>

This class holds a GPS almanac as read from SEM or YUMA files.

Depending on the source (SEM or YUMA), some fields may be filled in or not. An almanac read from a YUMA file doesn't hold SVN number, average URA and satellite configuration.

Since:

8.0

Author:

Pascal Parraud

Constructor Summary

Constructors

Constructor	Description
GPSAlmanac(FieldGPSAlmanac<T> original)	Constructor from field instance.
GPSAlmanac(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, String source, int svn, int health, int ura, int satConfiguration)	Constructor.

Method Summary

Modifier and Type	Method	Description
GPSAlmanacFactory	baseFactory(Frame inertial, Frame bodyFixed)	Factory for the orbital elements.
int	getHealth()	Get the Health status.
int	getSatConfiguration()	Get the satellite configuration.
String	getSource()	Get the source of this GPS almanac.
int	getSVN()	Get the satellite "SVN" reference number.
int	getURA()	Get the average URA number.
<T extends CalculusFieldElement<T>> FieldGPSAlmanac<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

Constructor Details

GPSAlmanac

public GPSAlmanac(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,
 String source,
 int svn,
 int health,
 int ura,
 int satConfiguration)

Constructor.

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

source - source of the almanac

svn - SVN number

health - health status

ura - average URA

satConfiguration - satellite configuration

GPSAlmanac

public GPSAlmanac(FieldGPSAlmanac<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>>
FieldGPSAlmanac<T> toField(FieldKeplerianOrbit<T> orbit,
 T[] nonKeplerian,
 DoubleFunction<T> converter)

Create another field version of the instance.

Specified by:

toField in class GNSSOrbitalElements<GPSAlmanac>

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

getSource

public String getSource()

Get the source of this GPS almanac.

Sources can be SEM or YUMA, when the almanac is read from a file.

Returns:

the source of this GPS almanac

getSVN

public int getSVN()

Get the satellite "SVN" reference number.

Returns:

the satellite "SVN" reference number

getHealth

public int getHealth()

Get the Health status.

Returns:

the Health status

getURA

public int getURA()

Get the average URA number.

Returns:

the average URA number

getSatConfiguration

public int getSatConfiguration()

Get the satellite configuration.

Returns:

the satellite configuration

baseFactory

public GPSAlmanacFactory baseFactory(Frame inertial,
 Frame bodyFixed)

Factory for the orbital elements.

Specified by:

baseFactory in class GNSSOrbitalElements<GPSAlmanac>

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