List of GPS signal reception methods (characteristics of all three types)
Reception
method
Time adjustment Time zone adjustment
Leap second data
reception
Features
Time adjustment
Display the correct current time for
the set (selected) time difference
Time zone identification and
time adjustment
Identify the time zone of your current
location, and display the correct current
time
Leap second
reception
Ready for leap second
data reception and
receiving Leap second
data → P. 26
Number of
acquired
satellites
necessary for
reception
One unit (to obtain only time
information)
Basically more than 4 units (to obtain time
information and time zone information)
-
Time taken for
reception
3 seconds to 1 minute 30 seconds to 2 minutes
30 seconds to 18
minutes
What kind of
situation
To set the watch to the correct time
while it is used in the same time
zone (time difference)
When the watch is used in a different time
zone
This is performed
automatically after
GPS signal reception
(automatic time
adjustment, manual
time adjustment, or
time zone adjustment)
on or after June 1st
and December 1st.
GPS signal reception Q & A
Q : When
the watch is moved to a different time zone, does the watch automatically display the
local time?
A : The watch does not automatically display the local time just by changing location.
If you are in a place where GPS signals can be easily received, adjust the time zone. The
watch automatically displays the local time.
When you are in a place where GPS signals cannot be received, perform manual time
difference setting (selection).
→ How to perform manual time difference setting (selection) P. 23
(The watch can be set to any time zone (time difference) around the world.)
Q : Is DST (Daylight Saving Time) automatically changed by receiving GPS signals?
A :
Perform time difference setting (selection) manually.
→ How to perform manual time difference setting (selection) P. 23
(Signals from GPS satellites do not contain DST (daylight saving time or “summer time”)
information.)
Even within the same time zone, some countries or regions may not follow DST (daylight
saving time or “summer time”).
→ List of time differences around the world (for reference) P.
12
Q : Is it necessary to carry out special operation for years in which a leap second is added?
A
: No particular operation is necessary.
As leap second data is received at the same time as GPS signal reception (automatic time
adjustment or manual time adjustment) on or after June 1st and December 1st, leap seconds
are automatically inserted when GPS signals are periodically received. See "Leap second
(Automatic leap second reception function)" P. 26 for details.
17
4
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.)
ASTRON 3X22 GPS SOLAR
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