Package lejos.hardware.gps

Class GGASentence

java.lang.Object

lejos.hardware.gps.NMEASentence

lejos.hardware.gps.GGASentence

public class GGASentence
extends NMEASentence

This class has been designed to manage a GGA Sentence GGA - essential fix data which provide 3D location and accuracy data. $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47 Where: GGA Global Positioning System Fix Data 123519 Fix taken at 12:35:19 UTC 4807.038,N Latitude 48 deg 07.038' N 01131.000,E Longitude 11 deg 31.000' E 1 Fix quality: 0 = invalid 1 = GPS fix (SPS) 2 = DGPS fix 3 = PPS fix 4 = Real Time Kinematic 5 = Float RTK 6 = estimated (dead reckoning) (2.3 feature) 7 = Manual input mode 8 = Simulation mode 08 Number of satellites being tracked 0.9 Horizontal dilution of position 545.4,M Altitude, Meters, above mean sea level 46.9,M Height of geoid (mean sea level) above WGS84 ellipsoid (empty field) time in seconds since last DGPS update (empty field) DGPS station ID number *47 the checksum data, always begins with *

Field Summary

Fields

Modifier and Type	Field and Description
private float	altitude
private java.lang.String	altitudeUnits
private int	dateTimeOfFix
private float	geoidalSeparation
private java.lang.String	geoidalSeparationUnit
private float	hdop
static java.lang.String	HEADER
private double	latitude
private char	latitudeDirection
private double	longitude
private char	longitudeDirection
private java.lang.String	nmeaHeader
private int	quality
private int	satellitesTracked

Fields inherited from class lejos.hardware.gps.NMEASentence

LATITUDE, LONGITUDE

Constructor Summary

Constructors

Constructor and Description
GGASentence()

Method Summary

Modifier and Type	Method and Description
protected double	degreesMinToDegreesDbl(java.lang.String DD_MM, int CoordinateType) Any GPS Receiver gives Lat/Lon data in the following way: http://www.gpsinformation.org/dale/nmea.htm http://www.teletype.com/pages/support/Documentation/RMC_log_info.htm 4807.038,N Latitude 48 deg 07.038' N 01131.000,E Longitude 11 deg 31.000' E This data is necessary to convert to Decimal Degrees.
float	getAltitude() Get Altitude
int	getFixQuality() Get GPS Quality Data
float	getHDOP() Get Horizontal Dilution of Precision (HDOP)
java.lang.String	getHeader() Returns the NMEA header for this sentence.
double	getLatitude() Get Latitude
char	getLatitudeDirection() Get Latitude Direction
double	getLongitude() Get Longitude
char	getLongitudeDirection() Get Longitude Direction
int	getSatellitesTracked() Returns the number of satellites being tracked to determine the coordinates.
int	getTime() Returns the last time stamp retrieved from a satellite
void	parse(java.lang.String sentence) Method used to parse a GGA Sentence

Methods inherited from class lejos.hardware.gps.NMEASentence

degreesMinToDegrees, isNumeric

Methods inherited from class java.lang.Object

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

Field Detail

latitude

private double latitude

longitude

private double longitude

nmeaHeader

private java.lang.String nmeaHeader

dateTimeOfFix

private int dateTimeOfFix

latitudeDirection

private char latitudeDirection

longitudeDirection

private char longitudeDirection

quality

private int quality

satellitesTracked

private int satellitesTracked

hdop

private float hdop

altitude

private float altitude

altitudeUnits

private java.lang.String altitudeUnits

geoidalSeparation

private float geoidalSeparation

geoidalSeparationUnit

private java.lang.String geoidalSeparationUnit

HEADER

public static final java.lang.String HEADER

See Also:

Constant Field Values

Constructor Detail

GGASentence

public GGASentence()

Method Detail

degreesMinToDegreesDbl

protected double degreesMinToDegreesDbl(java.lang.String DD_MM,
                                        int CoordinateType)

Any GPS Receiver gives Lat/Lon data in the following way: http://www.gpsinformation.org/dale/nmea.htm http://www.teletype.com/pages/support/Documentation/RMC_log_info.htm 4807.038,N Latitude 48 deg 07.038' N 01131.000,E Longitude 11 deg 31.000' E This data is necessary to convert to Decimal Degrees. Latitude values has the range: -90 <-> 90 Longitude values has the range: -180 <-> 180

Parameters:

DD_MM -

CoordinateType -

Returns:

the degrees

getHeader

public java.lang.String getHeader()

Returns the NMEA header for this sentence.

Specified by:

getHeader in class NMEASentence

Returns:

The NMEA header string ($GPGGA, $GPVTG, etc...)

getLatitude

public double getLatitude()

Get Latitude

getLatitudeDirection

public char getLatitudeDirection()

Get Latitude Direction

Returns:

the latitude direction

getLongitude

public double getLongitude()

Get Longitude

getLongitudeDirection

public char getLongitudeDirection()

Get Longitude Direction

Returns:

the longitude direction

getAltitude

public float getAltitude()

Get Altitude

Returns:

the altitude

getTime

public int getTime()

Returns the last time stamp retrieved from a satellite

Returns:

The time as a UTC integer. 123519 = 12:35:19 UTC

getSatellitesTracked

public int getSatellitesTracked()

Returns the number of satellites being tracked to determine the coordinates.

Returns:

Number of satellites e.g. 8

getFixQuality

public int getFixQuality()

Get GPS Quality Data

Returns:

the fix quality

getHDOP

public float getHDOP()

Get Horizontal Dilution of Precision (HDOP)

Returns:

the hdop

parse

public void parse(java.lang.String sentence)

Method used to parse a GGA Sentence

Specified by:

parse in class NMEASentence