Trimble Outdoors SPSX51 - Manual (Page 136)

A NMEA-0183 Output
134 SPSx51 Modular GPS Receivers User Guide
ZDA UTC Day, Month, And Year, and Local Time Zone Offset
An example of the ZDA message string is shown below, and Table A.15 describes the
message fields.
$GPZDA,172809,12,07,1996,00,00*45
Fields 5 and 6 together yield the total offset. For example, if field 5 is –5 and field 6 is
+15, local time is 5 hours and 15 minutes earlier than GMT.
Table A.15 ZDA message fields
Field Meaning
0 Message ID $GPZDA
1 UTC
2 Day, ranging between 01 and 31
3 Month, ranging between 01 and 12
4 Year
5 Local time zone offset from GMT, ranging from 00 through ±13 hours
6 Local time zone offset from GMT, ranging from 00 through 59 minutes
7 The checksum data, always begins with *