Package org.hortonmachine.gears.io.nmea

Class NmeaGpsPoint

  • public class NmeaGpsPoint
extends Object
    Representation of a complete gps point info. 
     RMC - NMEA has its own version of essential gps pvt (position, velocity, time) data. It is called RMC, The Recommended Minimum, which will look similar to:
 $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
 Where:
      RMC          Recommended Minimum sentence C
      123519       Fix taken at 12:35:19 UTC
      A            Status A=active or V=Void.
      4807.038,N   Latitude 48 deg 07.038' N
      01131.000,E  Longitude 11 deg 31.000' E
      022.4        Speed over the ground in knots
      084.4        Track angle in degrees True
      230394       Date - 23rd of March 1994
      003.1,W      Magnetic Variation
      *6A          The checksum data, always begins with *
 
 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 *
    Author:
    Andrea Antonello (www.hydrologis.com)