Triton Sidescan User Manual
Page 20
Page 17
Pitch Corrections
This option uses the 'pitch' value in the motion data (if available) to apply along
track position corrections. Options include:
o
From XTF:
Reads the pitch value for each ping from the XTF file. There is
an option here for setting an absolute angular offset
o
Static Offset:
AIf the sidescan sonar was mounted at an angle or was known
to be inclined in the water at a fairly steady angle, a static pitch value can be
applied to the mosaic.
Latency
Check this box if there is a known latency and if the value is recorded to the
XTF files.
TVG
The TVG tool allows the user to correct for gain loss in the sidescan record.
Checking this option will apply the loaded TVG curve.
Filters
There are two additional filters that users can apply to the raw data when
creating a sidescan mosaic.
o
Despeckle:
This filter is designed to remove interference and noise from
other sound sources seen in the sidescan record. The 'Threshold' sets the
amplitude of the "noise" that is acceptable. The 'Set Filter Extent' sets the
dimensions of the filter in the across track (samples) and along track (pings)
directions.
o
Moving Average:
This filter is designed to smooth the data to remove noise
from very turbid water or from poor quality sonars. The 'Moving Average'
filter only works in the along track direction with the option to set the
number of pings to include.
Save
The last option available is the ability to save all of the settings used to a file so
they can be recalled in the future.