Here’s a concise review of a typical (assuming you’re referring to a reference document listing GPS/NMEA data sentences, e.g., from Trimble, Furuno, or a technical guide):
NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounders, sonars, anemometers, GPS receivers, gyrocompasses, and autopilots. It is defined and controlled by the National Marine Electronics Association (NMEA). nmea 0183 sentences pdf
: Most sentences include an optional checksum at the end, preceded by an asterisk * , to ensure data integrity during transmission. Common NMEA 0183 Sentences Description Key Data Provided $GPGGA Global Positioning System Fix Data Time, position, fix quality, and altitude. $GPGLL Geographic Position - Latitude/Longitude Latitude, longitude, and UTC time. $GPGSV GNSS Satellites in View Number of satellites, PRN numbers, elevation, and azimuth. $GPRMC Recommended Minimum Specific GNSS Data Time, date, position, speed, and course. $GPVTG Course Over Ground and Ground Speed Actual track made good and speed over ground. Hardware & Electrical Specifications Here’s a concise review of a typical (assuming
If the calculated checksum does not match the checksum in the sentence, the data must be discarded. Common NMEA 0183 Sentences Description Key Data Provided
$GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
For technical implementations, you can consult detailed guides like the Everything you need to know about NMEA 0183 PDF from Actisense or the NMEA 0183 Information Sheet provided by UiB.