Parses coordinates from an NMEA GGA string
true for success, false for invalid GGA strings.
Parses NMEA GGA strings according to http://gpsd.berlios.de/NMEA.txt
GGA - Global Positioning System Fix Data Time, Position and fix related data for a GPS receiver. 0 1 2 3 4 5 6 7 8 9 10 | 12 13 14 15 | | | | | | | | | | | | | | | | $--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh Field Number: 1) Universal Time Coordinated (UTC) 2) Latitude 3) N or S (North or South) 4) Longitude 5) E or W (East or West) 6) GPS Quality Indicator, 0 - fix not available, 1 - GPS fix, 2 - Differential GPS fix (values above 2 are 2.3 features) 3 - PPS fix 4 - Real Time Kinematic 5 - Float RTK 6 - estimated (dead reckoning) 7 - Manual input mode 8 - Simulation mode 7) Number of satellites in view, 00 - 12 8) Horizontal Dilution of precision (meters) 9) Antenna Altitude above/below mean-sea-level (geoid) (in meters) 10) Units of antenna altitude, meters 11) Geoidal separation, the difference between the WGS-84 earth ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level below ellipsoid 12) Units of geoidal separation, meters 13) Age of differential GPS data, time in seconds since last SC104 type 1 or 9 update, null field when DGPS is not used 14) Differential reference station ID, 0000-1023 15) Checksum Example: $GPGGA,200329.000,4932.7248,N,01159.2531,E,1,06,1.5,401.0,M,47.4,M,,0000*5AThis method neighter uses nor validates the entire GGA string. For this method it is enough, that the fields 1, 2, 4 and 9 are valid floting point numbers with a dot as decimal separator, the fields 3 and 5 contain respectively N/S and E/W and that the field 0 has the format $..GGA meaning: char[0] is '$', char[3] and char[4] are both 'G' and char[5] is 'A'.
Utils Class | serial Namespace