The ABCS Program for the Analysis of Echo Sounder Returns for ...

DSTO-GD-0215If a longer ping duration was used this match would not be as precise, but even along echo sounder ping of 200 msec with a large change in seafloor depth still has agood match (see Figure 4).-70100m depth. No corrections50m depth. No corrections-80100m depth. Transformed to 50mReturned Signal Power (dB re W)-90-100-110-1200 0.1 0.2 0.3Time (sec)Figure 4: Returned Signal for a 200 msec Sine Wave Source. This plot was calculated usingLevels.9