USGlobalsat EB-5631RE - Manual (Page 16)

2012/7/30 - 16 -
ZDA - Time and Date
This message is included only with systems which support a time-mark output pulse identified as
"1PPS". Outputs the time associated with the current 1PPS pulse. Each message is output within
a few hundred ms after the 1PPS pulse is output and tells the time of the pulse that just occurred.
Table B-11 contains the values for the following example:
$GPZDA,181813,14,10,2003,,*4F<CR><LF>
Table B-11: ZDA Data Format
Name Example Unit Description
Message ID $GPZDA ZDA protocol header
UTC Time 181813 hhmmss
The UTC time units are:
hh=UTC hours from 00 to 23 mm=UTC minutes
from 00 to 59 ss=UTC seconds from 00 to 59 Either
using valid IONO/UTC or estimated from default
leap seconds
Day 14 Day of the month, range 1 to 31
Month 10 Month of the year, range 1 to 12
Year 2003 Year
Local zone hour
1
hour Offset from UTC (set to 00)
Local zone minutes
1
minute Offset from UTC (set to 00)
Checksum *4F
<CR><LF> End of message termination
1. Not supported by CSR, reported as 00.