Nikon Nikon 1 AW1 Reference Manual (en)

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6
Update the data.
Highlight Yes and press 
J to update
the assisted GPS file. The update takes
about two minutes.
D
Expiry Date
Assisted GPS files remain valid for about two weeks after download and
can not be used after their expiry date (an error message will be dis-
played if you attempt to use an out-of-date file). To view the expiry date
for the current assisted GPS file, select Location data > Position
(
0 107). Update assisted GPS files before using the location data func-
tion; expired files can not be used to assist the acquisition of location
data. Assisted GPS files do not assist the acquisition of location data
from GLONASS satellites.