hotons: starting from the refraction in the air-water interface, to some specific depth underneath the water body. </p><h2 id="Quick-Install"><a class="docs-heading-anchor" href="#Quick-Install">Quick Install</a><a id="Quick-Install-1"></a><a class="docs-heading-anchor-permalink" href="#Quick-Install" title="Permalink"></a></h2><ol><li><p><a href="https://julialang.org/downloads/">Install Julia</a></p></li><li><p>Launch Julia and type</p></li></ol><pre><code class="language-julia hljs">using Pkg
Pkg.add(&qu