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definitions.md

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Here are all the definitions of the different NMEA 0183 sentences, explained in detail by data fields. Follow the links to get the complete (up-to-date v4, 2007) definitions of each sentence.

  • GBS NMEA sentence structure: link

      The GBS sentence is primarily used to ensure the integrity of GNSS signals

  • GGA NMEA sentence structure: link

      The GGA sentence provides fundamental positioning data from a GNSS receiver

  • GLL – Geographic Position (Lat_Long): link

      The GLL NMEA sentence is used to transmit basic positioning information (latitude, longitude, UTC time)
  and the status of the GNSS fix.
  It's simple and lightweight.

  • GPQ NMEA sentence structure: link

      The GPQ NMEA sentence is used for reporting the quality and status of the GNSS receiver, including satellite
  visibility, signal quality, fix status, and receiver health.

  • GSA NMEA sentence structure: link

      The GSA NMEA sentence is used to report the fix status, the satellites used for the position calculation,
  and the DOP values (Position Dilution of Precision, Horizontal Dilution of Precision, and Vertical Dilution
  of Precision).

  • GST NMEA sentence structure: link

      The GST NMEA sentence is used to report the standard deviation (uncertainty) of the GNSS position,
  along with the DOP values (PDOP, HDOP, and VDOP), which provide insight into the quality of the GNSS fix.

  • RMC NMEA sentence structure: link

      The RMC (Recommended Minimum Specific GPS/Transit Data) NMEA sentence is widely used to provide basic
  but critical positioning, speed, and heading information from a GPS receiver.

  • VTG NMEA sentence structure: link

      The VTG (Course and Speed Over Ground) NMEA sentence provides vital navigation information including
  the course over ground and speed over ground.

  • ZDA NMEA sentence structure: link

      The ZDA (Time and Date) NMEA sentence is used to provide accurate date and time information,
  including UTC time, the day, month, year, and the local time offset from UTC.

Reference:

Pdf - NMEA Reference Manual SiRF Technology, Inc. Revision 2.1, December 2007