Leap Second (Automatic Leap Second Reception Function) - Seiko ASTRON User Manual

5
DETAILED INFORMATION
Leap second
The leap second is to
compensate for deviations from
the universal time (UT) which is
astronomically determined and
the "International Atomic Time
(TAI).
"1 second" may be added
(deleted) once a year or every
few years.
Automatic leap second
reception function
A leap second is automatically
added by receiving "leap
second data" from GPS signals
at the time of leap second
addition.
 "Leap second data" includes
information about future leap second
addition and current leap second data.

Leap second (Automatic leap second reception function)

Reception of leap second data
The indicator hand displays as shown at the right when GPS signals are received (time
zone adjustment or time adjustment) around June or December (display of being ready
for leap second data reception or receiving leap second data). At this time, the second
hand points to any of the 0 to 18-second positions to indicate the waiting time until
the leap second data reception by minutes. The waiting time is subtracted for each
minute, and when the second hand points to the 0-second position, the leap second data
reception is started. It is recommended you move to a place where GPS signals can be
easily received.
 Place where GPS signals can be easily received/Place where GPS signals cannot be received
 The position of the second hand is an indication of the time until the leap second data reception is started.
(When the second hand points to the 6-second position, it means that the reception will be started approximately 6 minutes later.)
 At this time, the second hand does not move at one-second intervals, however, it does not mean a failure.
The second hand moves in the same manner as the manual time adjustment during the leap second data reception.
 How to manually adjust the time
When the leap second data reception is completed, after the reception result is displayed, the second hand starts
moving at 1-second intervals.
The indicator hand also returns to display the charging status. Use the watch as it is.
 The leap second data reception is performed every half a year regardless of leap second addition.
When GPS signals are received under the following conditions, the leap second data reception is also started.
• GPS signals are received after the system reset
• GPS signals have not been received for a long time
• Leap second data reception has failed
(Leap second data reception is performed again during the next GPS signal reception. It is repeated until the leap second data reception is successful.)
ASTRON 7X52 GPS SOLAR
P . 21 ~ 22
30
P. 13