This example looks at some Kongsberg TOPAS PS-18 Singlebeam Sonar data.
For an equipment description see Kongsberg:
https://www.kongsberg.com/globalassets/kongsberg/1.-what-we-do/2.-ocean-space/5.-seafloor-mapping/topas/ps18/topas-ps-18-parametric-sub-bottom-profiler.pdf

The only publicly available data are the "raw correlated" SEG-Y data.
The data were downloaded from https://www.rvdata.us/search/cruise/SKQ202113S
FYI, .tar.gz is 36GB and requires another 36GB to unpack (72GB). 
It's the sgy files for the entire cruise.


20210825110001 minimal processing

20210825122825 minimal processing

Notes:
1.  Very strong bottom reflector with little penetration.
2.  Trace to trace amplitude variation.
3.  Water bottom precursor.
4.  Diffractions

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