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.
