NEMA در ردیاب آنتن اتوماتیک

NMEA (National Marine Electronics Association) is a standard communication protocol used by GPS (Global Positioning System) devices to transmit location data. The most common format is NMEA 0183, which defines a set of sentences that GPS receivers output via serial communication.

ما Automatic Antenna Tracker supports NEMA data.

Common NMEA Sentences

Each NMEA sentence starts with “$”, followed by a comma-separated list of values.

  1. $GPGGA – Global Positioning System Fix Data
    • نمونه:mathematica
      • $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
    • Key fields:
      • 123519 – UTC time (12:35:19)
      • 4807.038,حرف – Latitude (48°07.038′ حرف)
      • 01131.000,E – Longitude (11°31.000′ E)
      • 1 – Fix quality (1 = GPS fix, 0 = No fix)
      • 08 – Number of satellites in use
      • 545.4,م – Altitude (545.4 متر)
  2. $GPRMC – Recommended Minimum Navigation Information
    • نمونه:mathematica
      • $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
    • Key fields:
      • آ – Status (A = Valid, V = Invalid)
      • 022.4 – Speed (in knots)
      • 084.4 – Course over ground (درجه)
      • 230394 – Date (23rd March 1994)
  3. $GPVTG – Course Over Ground and Speed
    • نمونه:mathematica
      • $GPVTG,054.7,T,034.4,M,005.5,N,010.2,K*48
    • Key fields:
      • 054.7,تی – Course over ground (true north)
      • 005.5,حرف – Speed (in knots)
      • 010.2,ک – Speed (in km/h)

NMEA Protocol Versions

  • NMEA 0183: A widely used serial communication standard for GPS, AIS (Automatic Identification System), and other marine electronics.
  • NMEA 2000: A more advanced version based on the CAN bus, supporting more complex marine electronic systems.

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