gps-wizard

ZDA - Zone Date and Time

This is one of the sentences commonly supported by GPS / GNSS receivers.

The ZDA sentence contains the UTC day, month, year and local time zone.

        1         2  3  4    5  6  7
        |         |  |  |    |  |  |
 $--ZDA,hhmmss.ss,xx,xx,xxxx,xx,xx*hh<CR><LF>

#	Field	Format	Example	Description
0	Sentence ID	string	$GPZDA	Talker ID (GP) + message ID (ZDA)
1	Time	hhmmss.sss	092751.000	UTC time, typically 2 or 3 dp. Leading zeros are always included
2	Day	dd	11	UTC day of the month; 01-31. Leading zeros are always included
3	Month	mm	03	UTC month of the year; 01-12. Leading zeros are always included
4	Year	yyyy	2004	UTC year
5	Zone hours	[-]HH	-1	Local time zone (hours); -13 to +13 hours
6	Zone mins	MM	00	Local time zone (minutes); 00 to 59. Apply same sign as hours
7	Checksum	hexadecimal	*7B	Checksum

Notes:

The sentence ID will be $GPZDA or $GNZDA.
The zone hours and mins is often fixed at 00 since GPS / GNSS receivers do not typically know the local time zone.

$GPZDA,160012.71,11,03,2004,-1,00*7D

$GPZDA,125900.000,10,12,2022,,*59

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