Globalsat EM-506 [12/17] Zda time and date

- 12 -

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

hour Offset from UTC (set to 00)

Local zone minutes

minute Offset from UTC (set to 00)

Checksum *4F

<CR><LF> End of message termination

1. Not supported by CSR, reported as 00.