lejos.gps
Class GSVSentence

java.lang.Object
  lejos.gps.NMEASentence
      lejos.gps.GSVSentence

public class GSVSentence
extends NMEASentence

This class has been designed to manage a GSV Sentence GPS Satellites in View eg. $GPGSV,3,1,11,03,03,111,00,04,15,270,00,06,01,010,00,13,06,292,00*74 $GPGSV,3,2,11,14,25,170,00,16,57,208,39,18,67,296,40,19,40,246,00*74 $GPGSV,3,3,11,22,42,067,42,24,14,311,43,27,05,244,00,,,,*4D $GPGSV,1,1,13,02,02,213,,03,-3,000,,11,00,121,,14,13,172,05*67 1 = Total number of messages of this type in this cycle 2 = Message number 3 = Total number of SVs in view 4 = SV PRN number 5 = Elevation in degrees, 90 maximum 6 = Azimuth, degrees from true north, 000 to 359 7 = SNR, 00-99 dB (null when not tracking) 8-11 = Information about second SV, same as field 4-7 12-15= Information about third SV, same as field 4-7 16-19= Information about fourth SV, same as field 4-7

Author:

recoded by BB

Field Summary

static String

HEADER

Fields inherited from class lejos.gps.NMEASentence

nmeaSentence, st

Constructor Summary

GSVSentence()

Method Summary

protected void	checkRefresh() This method is called by all the getter methods.
String	getHeader() Returns the NMEA header for this sentence.
Satellite	getSatellite(int index) Return a NMEA Satellite object.
int	getSatellitesInView() Returns the number of satellites currently in view.
protected void	parse(String sentence) Method used to parse a GSV Sentence

Methods inherited from class lejos.gps.NMEASentence

degreesMinToDegrees, getTimeStamp, isValid, setSentence

Methods inherited from class java.lang.Object

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

Field Detail

HEADER

public static final String HEADER

See Also:

Constant Field Values

Constructor Detail

GSVSentence

public GSVSentence()

Method Detail

getHeader

public String getHeader()

Returns the NMEA header for this sentence.

Specified by:

getHeader in class NMEASentence

Returns:

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

getSatellitesInView

public int getSatellitesInView()

Returns the number of satellites currently in view.

Returns:

Number of satellites e.g. 8

getSatellite

public Satellite getSatellite(int index)

Return a NMEA Satellite object.

Parameters:

index - the index of the satellite

Returns:

theNMEASatellite object for the selected satellite

checkRefresh

protected void checkRefresh()

This method is called by all the getter methods. It checks if a new sentence has been received since the last call. It sets nmeaSentence to null to act as flag for when method called again.

Overrides:

checkRefresh in class NMEASentence

parse

protected void parse(String sentence)

Method used to parse a GSV Sentence

Specified by:

parse in class NMEASentence