agi.foundation.navigation.datareaders

(agi.foundation.navigation-2025r1.jar)

Class SP3cHeaderRecord

java.lang.Object

agi.foundation.navigation.datareaders.SP3cHeaderRecord

public class SP3cHeaderRecord
extends Object

The SP3c ephemeris file header definition.

Constructor Summary

Constructors

Constructor and Description
SP3cHeaderRecord() Initializes a new instance of the SP3c Ephemeris File Header.

Method Summary

Modifier and Type	Method and Description
ArrayList<Integer>	getAccuracies() Gets the orbital accuracy exponent as listed in the header.
String	getAgency() Gets the generating agency.
double	getClockStandardDeviationBase() Gets the base number used in the calculation of the clock correction and clock correction rate standard deviations.
String	getComment() Gets the comment lines as a single String.
String	getCoordinateSystem() Gets the coordinate system.
String	getDataUsedDescriptor() Gets the data used descriptor.
double	getEpochInterval() Gets the epoch interval.
char	getFileTypeDescriptor() Gets the file type descriptor denotes the type of data included in this SP3c file.
long	getNumberOfEpochs() Gets the number of epochs listed in this file.
int	getNumberOfSats() Gets the number of satellites contained in this file.
String	getOrbitType() Gets the orbit type.
String	getPositionVelocityFlag() Gets the Position/Velocity Flag.
double	getPVStandardDeviationBase() Gets the base number used in the calculation of the Position and Velocity standard deviations.
ArrayList<SatelliteIdentifier>	getSatelliteIdentifiers() Gets the satellite identifiers as listed in the header of the SP3c file.
JulianDate	getStartEpoch() Gets the start epoch, made from the epoch year, month, day, hour, minute and second.
GlobalPositioningSystemDate	getStartEpochGps() Gets the start epoch in GPS time format, derived from the GPS week and time of week.
double	getStartFractionalDay() Gets the start epoch fractional day.
int	getStartModifiedJulianDate() Gets the start epoch modified Julian date.
String	getTimeReference() Gets the time standard all data in the SP3c file is referenced to.
TimeStandard	getTimeStandard() Gets the Time Standard used in this SP3c Ephemeris file.
String	getVersion() Gets the version of this file.

Methods inherited from class java.lang.Object

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

Constructor Detail

SP3cHeaderRecord

public SP3cHeaderRecord()

Initializes a new instance of the SP3c Ephemeris File Header.

Method Detail

getVersion

public final String getVersion()

Gets the version of this file.

getPositionVelocityFlag

public final String getPositionVelocityFlag()

Gets the Position/Velocity Flag.

getStartEpoch

@Nonnull
public final JulianDate getStartEpoch()

Gets the start epoch, made from the epoch year, month, day, hour, minute and second.

getNumberOfEpochs

public final long getNumberOfEpochs()

Gets the number of epochs listed in this file.

getDataUsedDescriptor

public final String getDataUsedDescriptor()

Gets the data used descriptor.

getCoordinateSystem

public final String getCoordinateSystem()

Gets the coordinate system.

getOrbitType

public final String getOrbitType()

Gets the orbit type.

getAgency

public final String getAgency()

Gets the generating agency.

getStartEpochGps

@Nonnull
public final GlobalPositioningSystemDate getStartEpochGps()

Gets the start epoch in GPS time format, derived from the GPS week and time of week.

getEpochInterval

public final double getEpochInterval()

Gets the epoch interval.

getStartModifiedJulianDate

public final int getStartModifiedJulianDate()

Gets the start epoch modified Julian date.

getStartFractionalDay

public final double getStartFractionalDay()

Gets the start epoch fractional day.

getNumberOfSats

public final int getNumberOfSats()

Gets the number of satellites contained in this file.

getSatelliteIdentifiers

@Nonnull
public final ArrayList<SatelliteIdentifier> getSatelliteIdentifiers()

Gets the satellite identifiers as listed in the header of the SP3c file. For GPS satellites, these are the Pseudo Random Noise numbers and GPS constellation identifiers.

getAccuracies

@Nonnull
public final ArrayList<Integer> getAccuracies()

Gets the orbital accuracy exponent as listed in the header. The accuracy is interpreted as 2**exponent meters. An exponent value of 0 indicates the accuracy is unknown. The accuracies are ordered identically to the satellite identifier ordering in SatelliteIdentifiers (get).

getFileTypeDescriptor

public final char getFileTypeDescriptor()

Gets the file type descriptor denotes the type of data included in this SP3c file. The SP3c definition defines the types allowed: 'G' denotes data from the GPS constellation 'M' denotes data from mixed constellations/satellites 'R' denotes data from the GLONASS constellation 'L' denotes data from LEO satellites 'E' denotes data from the Galileo constellation

See NASA's Archive of Space Geodesy Data for a list of LEO descriptors.

getTimeReference

public final String getTimeReference()

Gets the time standard all data in the SP3c file is referenced to. The SP3c definition defines the types allowed: "GPS" denotes GPS time "GLO" denotes GLONASS UTC time "GAL" denotes Galileo system time "TAI" denotes international atomic time "UTC" denotes Universal time.

getPVStandardDeviationBase

public final double getPVStandardDeviationBase()

Gets the base number used in the calculation of the Position and Velocity standard deviations. The standard deviation calculations are defined in the SP3c definition.

getClockStandardDeviationBase

public final double getClockStandardDeviationBase()

Gets the base number used in the calculation of the clock correction and clock correction rate standard deviations. The standard deviation calculations are defined in the SP3c definition.

getComment

public final String getComment()

Gets the comment lines as a single String.

getTimeStandard

@Nonnull
public final TimeStandard getTimeStandard()

Gets the Time Standard used in this SP3c Ephemeris file.