The data captured by the GPS receiver is NMEA data. Now we will try to see more familiar with NMEA data. NMEA (National Marine Electronics Association) standard was developed specifically for the industry as an inter-face of a variety of marine equipment introduced since 1983. The standard is awarded to marine equipment that sends information to a computer or other device. Examples of equipment issued is the GPS NMEA data.
NMEA-0183 contains information relating to the geography as about time, longitude, latitude, altitude, speed and many more. To display the information more understandable by users NMEA-0183 data needs to be further processed.
NMEA-0183 standard uses a simple ASCII format, each line defines the contents of each type of message that can be sorted out. Five of the first character after the $ sign is called address field. The first two characters in the address referred Talker-ID. After Talker-ID followed behind the 3 characters that describes the type of sentence. While each data separated by a comma, if there are empty fields will not fill in anything between two commas and terminated by a Carriage Return + Line Feed (CR + LF). NMEA-0183 has a variety of sentence types, one of which is the RMC ( Recommended Minimum Navigation Information). Examples of types of RMC NMEA data is as follows:
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NMEA-0183 contains information relating to the geography as about time, longitude, latitude, altitude, speed and many more. To display the information more understandable by users NMEA-0183 data needs to be further processed.
NMEA-0183 standard uses a simple ASCII format, each line defines the contents of each type of message that can be sorted out. Five of the first character after the $ sign is called address field. The first two characters in the address referred Talker-ID. After Talker-ID followed behind the 3 characters that describes the type of sentence. While each data separated by a comma, if there are empty fields will not fill in anything between two commas and terminated by a Carriage Return + Line Feed (CR + LF). NMEA-0183 has a variety of sentence types, one of which is the RMC ( Recommended Minimum Navigation Information). Examples of types of RMC NMEA data is as follows:
Name | Sample | Unit | Information |
| Message ID | $GPRMC | RMC protokol header | |
| UTC Position | 065102 | hhmmss.ss | |
| Status | A | A=data valid or V=data tidak valid | |
| Latitude | 0745.6301 | ddmm.mmmm | |
| N/S Indicator | S | N=north or S=south | |
| Longitude | 11024.5308 | dddmm.mmmm | |
| E/W Indicator | E | ||
| Speed Over Ground | 000.0 | knots | |
| Course Over Ground | 066.2 | degrees | E=east or W=west |
| Date | 030306 | ddmmyy | |
| Magnetic Variation | E | degrees | E=east or W=west |
| Checksum | *65 | ||
| CR LF | End of message termination |
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