Nema trên bộ theo dõi ăng -ten tự động

NMEA (Hiệp hội Điện tử Hàng hải Quốc gia) là một giao thức giao tiếp tiêu chuẩn được sử dụng bởi 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.

Của chúng tôi Trình theo dõi ăng -ten tự động 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
   • Ví dụ: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,N – Latitude (48°07.038′ N)
     • 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,M – Altitude (545.4 mét)
2. $GPRMC – Recommended Minimum Navigation Information
   • Ví dụ:mathematica
     • $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
   • Key fields:
     • Một – Status (A = Valid, V = Invalid)
     • 022.4 – Speed (in knots)
     • 084.4 – Course over ground (độ)
     • 230394 – Date (23rd March 1994)
3. $GPVTG – Course Over Ground and Speed
   • Ví dụ:mathematica
     • $GPVTG,054.7,T,034.4,M,005.5,N,010.2,K*48
   • Key fields:
     • 054.7,T – Course over ground (true north)
     • 005.5,N – Speed (in knots)
     • 010.2,K – 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.