Performing A Gnss Receiver Survey - Safran SecureSync 2400 User Manual

3.3 Managing References
Standard
Mobile (with u-blox receiv-
ers)
Notes:
3.3.3.5

Performing a GNSS Receiver Survey

When SecureSync's integrated GNSS receiver performs a survey, it tries to
determine or verify its geographic position with high accuracy. An accurate geo-
graphic position is required to calculate a precise system time from the GNSS ref-
erence.
During a GNSS survey, the position will be iteratively recalculated while gradually
increasing the position accuracy. A survey can take up to 33 minutes, but typ-
ically SecureSync will synchronize earlier, i.e. offer a valid Time and 1PPS ref-
erence, once it has obtained a sufficiently accurate preliminary position.
Verifying GNSS Survey Progress
236
Receiver Mode
The u-blox M8T receiver now uses
reboot, and Stationary
Note: This topic only applies to stationary applications – in
receiver mode NO surveys will be carried out since the position is
updated continuously.
Note: If a system has been moved, in
Land Dynamics, receivers will automatically re-survey on reboot. In
Standard mode and
once, and will not re-survey on reboot.
Receiver Dynamics
Land
Sea
(Resurvey)
Land to indicate it will RESURVEY on
to indicate it will not resurvey after reboot.
Stationary Dynamics, the unit will survey only
CHAPTER
Stationary
Air (No Resur-
vey)
Standard receiver mode and
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3 SecureSync 2400 User Manual Rev. 5.2
Mobile