Reson SeaBat 7125 SV2, Operator'S Manual

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SYSTEM OPERATION
SeaBat 7125 SV2 Operator‟s Manual
Page 80 July 25, 2011
Version 3
Adaptive Window Size: Applies the percentage value as entered in the
Adaptive Window Size based on the total samples in the ping. Once the initial
bottom detection point is located, the gates are propagated in each direction
using this number. The bottom detection from beam to beam is therefore
based on the results from the previous beams. Increasing this window size
allows more samples to be included in the detection process, but may also
introduce noise. Decreasing this window size too much may degrade
performance, when the bottom is not flat.
Click the Apply button to finalize changes.
5.7.2.4 Quality Filter
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Enable Quality Filter: Allows the operator to prevent export and display of
any data which does not exceed a predetermined quality threshold.
For details on the quality testing, see
section 7.4 Quality .
5.7.3 Ocean Settings
The Ocean Menu tab allows the operator to enter various correction factors to
compensate for changing environmental conditions.
Figure 22: Sample of Ocean Menu Tab
NOTE
For all sliders on the Ocean Menu tab, the new settings will not be sent until the
mouse has released control of the sliders.
5.7.3.1 Change the Absorption Loss Value (Absorption)
The Absorption slider allows the operator to enter the amount of loss expected through
the ambient water medium. The range available is from 0 to 120dB/km. The last selected
user setting is stored and will be recalled upon system startup.
This value is used in conjunction with the spreading loss coefficient to compute the TVG
(time-varied gain) curve as described in
section 5.7.3.2 below .
For examples on how to use this setting, see
section 6.6.1 Loss of Sound by Absorption .
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Available with the Efficiency feature package (see Table 19 ).