Software Features
SeaKing Profiling Sonar
0374-SOM-00002, Issue: 04
38
© Tritech International Ltd.
5.1.2. Mean Altitude Operation
The mean altitude calculation will function with a single or dual head Profiler
system.
Note
If a 4-head profiler system is employed and displayed as
Quad
Profiler
, the 1st pair will normally be used for the mean altitude
calculation.
All valid data points within the Profiler scan packet(s) will be passed into the
mean altitude calculation, however, a set of rules will remove data points
that fall within trench coverage so that only seabed returns are used in the
calculation. Non-valid data points will not be included and these include zero
values and points outside a boundary determined by the value of a
Filter
Gating
parameter.
The following rules apply:
• Any null (zero) data points within the scan packet will not be included in
the calculation.
• If the current data point exceeds a calculated mean altitude by ± the
Filter Gating
value, this current data point will not be included in the
final calculation. This will eliminate any spurious points and spikes from the
final mean altitude value.
• In a dual head operation, if at any time one of the Profilers is disabled or
is not producing data then a mean calculation will still be produced using
the data from the functional head.
• If there are no valid data points then a zero value is produced and the mean
altitude text display and reference line are held at the last non-zero value.
5.1.3. Mean Altitude Setup and Operating Notes
Select Heads
This sets which Profiler heads are to be used
for the mean altitude calculation.
Both
heads
