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12 NMEA-0183 Output
128 5700 GPS Receiver User Guide
Reference
12.3Common Message Elements
Each message contains:
• A message ID consisting of $GP followed by the message type.
For example, the message ID of the GGA message is $GPGGA.
• A comma
• A number of fields that depend on message type, separated by
commas
• An asterisk
• A checksum
Here is an example of a simple message with a message ID
($GPGGA), followed by 13 fields and checksum value:
$GPGGA,172814.0,3723.46587704,N,12202.26957864,W,2,6,
1.2,18.893,M,-25.669,M,2.0,0031*4F
12.3.1 Message Values
The following values can be found in NMEA messages output by the
5700 receiver.
Latitude and Longitude
Latitude is represented as ddmm.mmmm and longitude is represented
as dddmm.mmmm,where:
• dd or ddd is degrees
• mm.mmmm is minutes and decimal fractions of minutes
Direction
Direction (north, south, east, or west) is represented by a single
character: N, S, E,orW.