Trimble Outdoors R7 - Manual (Page 184)

A NMEA-0183 Output
1 7 2 Trimble R7/R8 GPS Receiver User Guide
Tr
imble R7 and R8
A.3
Common 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 $GPGGA.
• A comma
• A number of fields that depend on message type, separated by
commas
• An asterisk
• A checksum value
Below is an example of a simple message with a message ID
($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
A.3.1
Message values
The following values can be found in NMEA messages that the
receiver generates.
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, or W.