Appendix D Time Strings
D.1 NMEA GPZDA
$GPZDA,
hhmmss
.00,
DD
,
MM
,
YYYY
,
SZZ
,
zz
*
CC
<CR><LF>
When
TIME = UTC
is selected in the [SERIAL] section of the configuration file,
the contents are:
hh
UTC hours
00–23
mm
UTC minutes
00–59
ss
UTC seconds
00–59
DD
UTC day-of-the-month
01–31
MM
UTC month
01–12
YYYY
UTC year
2000–2099
SZZ
local zone hours
+00 to ±13
zz
local zone minutes
00 to 59
CC
checksum
two hexadecimal digits representing the result
of the XOR of all characters between ‘$’ and ‘
*
’
(‘$’ and ‘
*
’ not included in the computation)
<CR>
carriage-return
ASCII 13d
<LF>
line-feed
ASCII 10d
Local time zone is the magnitude of hours plus the magnitude of minutes
added, with the sign of local zone hours, to local time to obtain UTC. Local
zone is generally negative for East longitudes with local exceptions near the
International Date Line.
When
TIME = LOCAL
is selected in the [SERIAL] section of the configuration
file, the contents are:
hh
local hours
00–23
mm
local minutes
00–59
ss
local seconds
00–59
DD
local day-of-the-month
01–31
MM
local month
01–12
YYYY
local year
2000–2099
SZZ
local zone hours
fixed at +00
zz
local zone minutes
fixed at 00
CC
checksum
two hexadecimal digits representing the result
of the XOR of all characters between ‘$’ and ‘
*
’
(‘$’ and ‘
*
’ not included in the computation)
<CR>
carriage-return
ASCII 13d
<LF>
line-feed
ASCII 10d
In this case, local time zone is set to +00:00.
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