2695 Series Operation Manual
EZT-2695-8000/1
Page
82
of
124
Configuration.
The initial offset values are those read from Nexus or as logged in a processed file. These can be
updated during processing if in error.
As each dataset is loaded it is displayed at the bottom left of the form and a checkbox next to each
datasets allows the user to easily enable/disable a complete dataset. The colours for the datasets
can be defined by selecting the dataset then clicking the coloured rectangle below to select.
The Auto Compute option perfoms several iterations of the
computation, applying computed C-Os and rejecting each time
based on the previous iteration until the residuals are minimal.
The user selects which C-Os to apply in this mode by enabling
Velocity / Bearing / Pitch / Roll C-Os (1 or more).
In Auto mode the residuals are applied each time in the
process until the residuals are minimal whereas in Manual
(Auto unticked) mode the 'Apply Residuals' button needs to be
pressed to apply the C-Os, in this way it provides flexibility
when processing as more/less corrections can be computed or
applied.
Compute Quadrant, performs a least squares iterration to
calculate the position of the transponder and calculate any C-
Os.
Processing Options for spurious data
•
Reject Outliers; when a computation is made the
standard deviation is computed and if this box is ticked
all ranges that have residuals > 3x SD will be rejected.
•
Reject Ranges; this will use the water depth to reject
all range data that is < 1% greater than the depth, this
rejects data that is directly under the vessel as this is
an ambiguous area for determining heading
information.
Corrections:
Enable / Disable each of the computed corrections to achieve
the best results from the data supplied.
Each correction can be applied individulally or collectivitly.
Apply Residuals, this is to manually apply the selected
residuals to the C-O prior to Computing Quadrant.
The button at the bottom provides the facility to send the
correction values directly to Easytrak and thus update it with
the calibrated values.
With C-Os un-checked the residual will display the total correction to be applied, this value can
then be entered into the edit boxes, the relevant check boxes selected and a further computation
carried out in manual mode.
Summary of Contents for Easytrak Nexus Lite 2683
Page 1: ...Easytrak Nexus Lite 2695 Series Operation Manual ...
Page 13: ...2695 Series Operation Manual EZT 2695 8000 1 Page 13 of 124 ...
Page 85: ...2695 Series Operation Manual EZT 2695 8000 1 Page 85 of 124 Summary Report ...
Page 86: ...2695 Series Operation Manual EZT 2695 8000 1 Page 86 of 124 Complete Listing of Dataset ...
Page 88: ...2695 Series Operation Manual EZT 2695 8000 1 Page 88 of 124 ...
Page 89: ...2695 Series Operation Manual EZT 2695 8000 1 Page 89 of 124 ...
