Table 3-2:
Receiver dynamics, ~modes, ~ dynamics, ~ types
Receiver Mode
Receiver Dynamics
Land
(Resurvey)
Sea
Air
Stationary
(No Resurvey)
Single Satellite
irrelevant
irrelevant
irrelevant
irrelevant
Standard
Mobile (with u-blox receivers)
Notes:
The
u-blox M8T
receiver now uses
Land
to indicate it will RESURVEY on reboot,
and
Stationary
to indicate it will not resurvey after reboot.
3.3.3.5 Performing a GNSS Receiver Survey
Note:
This topic only applies to
stationary applications
– in
Mobile
receiver mode NO surveys will be carried out since the position is
updated continuously.
When VelaSync's integrated GNSS receiver performs a survey, it tries to determine or
verify its geographic position with high accuracy. An accurate geographic position is
required to calculate a precise system time from the GNSS reference.
During a GNSS survey, the position will be iteratively recalculated while gradually increas-
ing the position accuracy. A survey can take up to 33 minutes, but typically VelaSync will
synchronize earlier, i.e. offer a valid Time and 1PPS reference, once it has obtained a suf-
ficiently accurate preliminary position.
Note:
If a system has been moved, in
Standard
receiver mode and
Land
Dynamics
, receivers will automatically re-survey on reboot. In
Stand-
ard
mode and
Stationary Dynamics
, the unit will survey only once, and
will not re-survey on reboot.
Verifying GNSS Survey Progress
To see if VelaSync's GNSS receiver is performing a survey and if so, verify its progress:
3.3 Managing References
CHAPTER
3
•
VelaSync User's Manual Rev. 3
133
Summary of Contents for VelaSync 1225
Page 2: ......
Page 4: ...Blank page II VelaSync User s Manual...
Page 12: ...BLANK PAGE X VelaSync User s Manual TABLE OF CONTENTS...
Page 28: ...16 CHAPTER 1 VelaSync User s Manual Rev 3 1 7 The VelaSync Web UI...
Page 34: ...BLANK PAGE 1 9 Regulatory Compliance 22 CHAPTER 1 VelaSync User s Manual Rev 3...
Page 104: ...BLANK PAGE 2 11 Configuring PTP 92 CHAPTER 2 VelaSync User s Manual Rev 3...
Page 251: ...Server management System specifications VelaSync User s Manual 239 APPENDIX...
Page 267: ...VelaSync User s Manual 255 APPENDIX...
