Triton Perspective - Manual (Page 104)

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Suppress Using Beam Quality: The bathymetry data sent from the sonar will have some flags
that have been set by the sonar; these are the Beam Quality flags Poor, Low, Bad. Note the
default settings reject only beams that are flagged as Bad by the sonar, but the user can
choose to reject more data based on the Poor or Low sonar flags.
Suppress Beams Outside Angle: Suppress beams that fall outside an angle that the user may
choose, allows potentially noisy outer beams to be rejected.
Suppress Beams Using Depth Range: Suppress beams that fall outside the expected depth
range for the survey.
Suppress Beams Using Gradient: Suppress beams that exceed a predetermined value for
gradient between adjacent beams.
Suppress Beams Inside Angle: Sonars that use the phase comparison method have very poor
data directly below the transducer; this option allows that area to be suppressed.
Suppress Beams Using Slant Range: Suppress beams that exceed a predetermined value for
slant range. For example the sonar range (slant range) may be set to 100m but all data beyond
80m is noisy.
Suppress using checksum: Suppress beams that do not have the correct number of characters
in the ping record. Used mainly for serial data where data can be dropped or lost. Use with
care as some sonar manufacturers do not support this type of error checking and all your data
may be flagged as bad.
Suppress By Beam Number: Must check the 'On' box to activate. Can select individual
beams with a mouse click. Selected beams will turn red in the display as shown above and
will be flagged as bad for processing. If a beam was selected by mistake or if the user wishes
to clear the selected beams in this window select the 'Reset' button to deselect all beams.
The other tab available here is called 'Attitude Suppression'. This is for suppressing beam
soundings based on the range of motion between pings and has three options as shown in the
image: