189
Commands
$GPZDA
This message is not output until the receiver has locked on at least one satellite.
The ZDA message contains UTC time, the current date, and offset values for
converting UTC time to local time. The message is output in the format:
$GPZDA,m1,d2,d3,d4,d5,d6*hh
Table 4.115 defines the message format.
Typical ZDA message:
$GPZDA,222835.10,21,07,1999,-07,00*4D
Table 4.116 describes the typical ZDA response message.
Table 4.115. $GPZDA Message Format
Field Description Range
m1 UTC time 000000.00 to
235959.90
d2 Current day 01 - 31
d3 Current month 01 - 12
d4 Current year 0000 - 9999
d5 Local time zone offset from UTC time (hours) -13 to +13
d6 Local time zone offset from UTC time
(minutes). This value has the same sign [+\-]
as d5, but the sign is not displayed for this field
00 - 59
*hh Checksum 2-character hex
Table 4.116. Typical ZDA Message
Field Description
$GPZDA Message header
222835.10 Current UTC time
21 Current day
07 Current month
1999 Current year
-07 Local time zone offset from UTC
(hours)
00 Local time zone offset from UTC
(minutes)
4D Checksum
G12RevD.book Page 189 Tuesday, April 2, 2002 4:33 PM
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