Applanix POS MV V5 Installation And Operation Manual page 123

An option is to wait until the MV RMS heading error falls below the threshold value set by
performing manoeuvres described in 11 and then select the Start command. In this case the
Status pane for GAMS will indicate CAL in Progress.
11. If possible, when GAMS has resolved the carrier phase ambiguities (GAMS on the main window
Status pane reads Ready Offline), perform a series of full turns, 'S-turns' or 'Figure-8'
manoeuvres, each lasting approximately one minute.
During these manoeuvres, monitor the POS MV Heading Accuracy field on the MV-POSView
main window Attitude pane (Figure 40: POSView Controller Main Window, page 5-3). When the
value displayed falls below the setting for the Heading Calibration Threshold field (Figure 34:
POSView GAMS Parameters Setup), finish the turns and manoeuvres and hold the vessel steady
on a course and at a fixed speed.
The Status pane for GAMS now indicates CAL in Progress and this condition lasts for
approximately 60 seconds. When POS MV has completed the calibration, the displayed GAMS
status becomes CAL Complete. This condition lasts for approximately five seconds and then
changes to Online.
If the POS MV Heading Accuracy field on the MV-POSView main window Attitude pane
(Figure 40: POSView Controller Main Window, page 5-3) shows the heading accuracy
deteriorating close to or above the calibration threshold then the vessel manoeuvres should be
continued during the calibration. This should keep the heading accuracy below the threshold.
12. Save calibration data: Select Settings, Save Settings. Wait until the MV-POSView Controller
program displays the Settings Saved message panel. Select the OK button to close the message
panel.
13. Monitor system operation: Indications of a successful calibration appear in the main window of
the MV-POSView Controller program:
• The Status pane for GAMS indicates Online.
• The Altitude pane Heading Accuracy field drops slowly to less than 0.15° and
eventually settles to a value of 0.03° in a low multipath environment.
If the calibration was successful and no GNSS dropouts occurred, POS MV should settle into a
steady-state operation using the GAMS heading aiding, as indicated by the Online status.
If the calibration was not successful, GAMS will reject the carrier phase ambiguities repeatedly
and will eventually reject the installation parameters. If this occurs, repeat the calibration process.
14. Record data: If the installation parameters appear to be correct, select Settings, Installation,
GAMS Parameter Setup from the menu bar (Figure 34: POSView GAMS Parameters Setup,
Copyright © Applanix Corporation, 2017
POS MV V5 Installation and Operation Guide
System
Configuration
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