Reson SeaBat 7125 ROV, Operator'S Manual

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SYSTEM PERFORMANCE AND DATA TYPES
SeaBat 7125 ROV Operator‟s Manual
Page 107 May 30, 2011
Version 3
Beams, whose SNR is greater than a predetermined threshold, will be flagged as
passing the brightness test.
For instructions on how to display the test results, see Quality in
section 5.7.4 Primary
Display Settings .
Bottom detection point
Adaptive gate
Comparison
window
A
B
C
Figure 46: Brightness Test
7.3.2 Colinearity Test
In general terms, this test will pass if a bottom detection point sample number for a given
beam falls on or near a line drawn through its neighboring beams' bottom detection
points. This is achieved using a moving polynomial fit of the points on either side of each
point. If a given point is within the window of the line fit, it is marked colinear.
This process is done in stages that begin with the central beams and moving outward on
each side of the wedge in turn.
For instructions on how to display the test results, see Quality in
section 5.7.4 Primary
Display Settings .
Point flagged with Poor colinearity
Line fit
Window extent
Figure 47: Colinearity Flags