Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page
25
of
58
TIME
–
Setting of time information
△
4
Initial time is configured. The setting of time is effective only within the case that time is not decided
by other factors. A setting of a millennium which is the times of GPS week rollover is received also
after time decision.
Format:
$PERDAPI , TIME , time of date , day , month , year *hh <CR> <LF>
1
2
3
4
5
Num
Contents
Range
Default
Remark
1
TIME
-
-
Command Name
2
Time of date
00 to 23
00 to 59
00 to 59
0
UTC (Hour)
UTC(Minute)
UTC(Second)
3
day
1 to 31
22
UTC (Date)
4
month
1 to 12
8
UTC (Month)
5
year
2013 to 2099
1999 UTC (Year)
△
3
Example:
$PERDAPI,TIME,021322,24,11,2020*64
Time: 02:13:22 on 24th November, 2020
Notes:
△
4
-
This command is needed to input correct date /- 1 year.
-
Under normal conditions, User needs not to set initial time because time is decided by satellite
navigation data.
-
As for GPS week rollover timing and GT-87 week rollover timing, please refer to the follow.
event
date
GPS week
GPS week rollover timing (1st)
default time of date of GT-87
1999/08/22
1024
GPS week rollover timing (2nd)
2019/04/07
2048
rollover timing of GT-87
2032/08/15
2745
GPS week rollover timing (3rd)
2038/11/21
3072
…
operable time limit of GT-87
2099/12/31
6260
[In case that GT-87 does not have glonass]
GT-87 can keep outputting correct date after 2032/08/15 during power distribution.
GT-87 will output 2012/12/30 after 2032/08/15 unless user sets correct date by TIME command
after user turns off GT-87 and also turns off backup current for BBRAM.
[In case that GT-87 has glonass]
GT-87 can adjust millennium automatically in the timing of first fix of glonass and outputs correct
date until 2099/12/31 without user setting even if user turns off GT-87 and backup current.
