Instruction Manual

Page 13
Based on the ping rate and the vessel speed we expect the beam spacing to be 0.2 meters,
not 4.89 meters. By processing the navigation we can smooth the positions of the pings so
that the beam lines are parallel and evenly spaced. This is important for getting clean
sidescan mosaics without navigation errors impacting the ability to interpret the data.
4.3 First Run of Navigation Processing
For processing this data I set the WINDOW = 50, NAV SOURCE = SENSOR (towed
sonar), ITERATIONS = 1, HEADING = CMG, with the SPEED FILTER = OFF. After only
one step of processing the image below shows the overlapping beam lines to be spread out
but they are still not uniformly spaced and need additional processing.