Here's one place: http://oalib.hlsresearch.com/Rays/ http://oalib.hlsresearch.com/Rays/ If you want to actually understand it, this book is pretty good IIRC: h

Here's one place: http://oalib.hlsresearch.com/Rays/ http://oalib.hlsresearch.com/Rays/ If you want to actually understand it, this book is pretty good IIRC: https://www.amazon.com/Computational-Acoustics-Modern-Signal-Processing/dp/1441986774/ref=sr_1_1?ie=UTF8&qid=1468718373&sr=8-1&keywords=computation+ocean+acoustics https://www.amazon.com/Computational-Acoustics-Modern-Signal...