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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.
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.)
Receiving Leap Second Data
When the GPS signal reception
is performed on or after
December 1st and June 1st, the
indicator hand displays as shown
at the right.
When the leap second data
reception is completed, the
indicator hand 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.
It takes up to 18 minutes to receive the leap second data.
Receiving the leap second data
Leap second (Automatic leap second reception function)
