[seiscomp, scanloc] Install, add .gitignore
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<title>Dense Travel-Time Tables — scanloc: Phase Associator documentation</title>
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<span class="title">scanloc: Phase Associator </span>
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<span class="version">2025.281#4efc2c878</span></h1>
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<section id="dense-travel-time-tables">
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<span id="scanloc-ttt"></span><h1>Dense Travel-Time Tables<a class="headerlink" href="#dense-travel-time-tables" title="Permalink to this heading">¶</a></h1>
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<p>The default travel time tables of SeisComP for <span id="id1"><em>LOCSAT</em> [<a class="reference internal" href="references.html#id180" title="LOCSAT. SeisComP locator. URL: https://docs.gempa.de/seiscomp/current/apps/global_locsat.html.">5</a>]</span> provide the
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times in intervals of 1 degree epicentral distance. Thus, the curvature of the
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travel-time curve at closer distance is not well imaged potentially resulting in
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wrong locations or missing event solutions. Therefore, the LOCSAT tables,
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<em>iasp91_scanloc</em>, based on the IASP91 model with higher spacial sampling are
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added to the scanloc package. The table files are located in
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<code class="file docutils literal notranslate"><span class="pre">$SEISCOMP_ROOT/share/locsat/tables</span></code>. They may be used along with scanloc
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and any other module which uses LOCSAT travel-time tables such as <span id="id2"><em>scolv</em> [<a class="reference internal" href="references.html#id268" title="scolv. SeisComP module. URL: https://docs.gempa.de/seiscomp/current/apps/scolv.html.">24</a>]</span>,
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<span id="id3"><em>scautoloc</em> [<a class="reference internal" href="references.html#id238" title="scautoloc. SeisComP module. URL: https://docs.gempa.de/seiscomp/current/apps/scautoloc.html.">14</a>]</span>, <span id="id4"><em>screloc</em> [<a class="reference internal" href="references.html#id275" title="screloc. SeisComP module. URL: https://docs.gempa.de/seiscomp/current/apps/screloc.html.">25</a>]</span> or even the locator <span id="id5"><em>StdLoc</em> [<a class="reference internal" href="references.html#id306" title="StdLoc. SeisComP locator. URL: https://docs.gempa.de/seiscomp/current/apps/global_stdloc.html.">7</a>]</span>.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>gempa may provide additional travel-time tables as a service based on custom
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velocity models. <a class="reference external" href="https://www.gempa.de/contact/">Contact</a> us for any
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related request.</p>
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</div>
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<figure class="align-center" id="id8">
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<span id="fig-ttt-scanloc"></span><a class="reference internal image-reference" href="../_images/ttt_scanloc_P_5km.png"><img alt="../_images/ttt_scanloc_P_5km.png" src="../_images/ttt_scanloc_P_5km.png" style="width: 18cm;" /></a>
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<figcaption>
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<p><span class="caption-text">Figure 42: Differences between P-wave travel times in the standard iasp91 tables for LOCSAT
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and the iasp91_scanloc tables provided with scanloc for an event at 5 km depth.</span><a class="headerlink" href="#id8" title="Permalink to this image">¶</a></p>
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</figcaption>
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</figure>
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<section id="application-in-scanloc">
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<h2>Application in scanloc<a class="headerlink" href="#application-in-scanloc" title="Permalink to this heading">¶</a></h2>
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<p>Configure the scanloc parameters <a class="reference internal" href="../apps/scanloc.html#confval-association.table"><code class="xref std std-confval docutils literal notranslate"><span class="pre">association.table</span></code></a> and
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<a class="reference internal" href="../apps/scanloc.html#confval-locator.profile"><code class="xref std std-confval docutils literal notranslate"><span class="pre">locator.profile</span></code></a> with <em>iasp91_scanloc</em> for using these LOCSAT tables
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in scanloc along with LOCSAT:</p>
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<div class="highlight-params notranslate"><div class="highlight"><pre><span></span># Type of travel-time tables for phase association. May be different from locator.
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# Use e.g. libtau or LOCSAT.
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association.tableType = LOCSAT
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# Name of travel-time table used for phase association. May be different from locator
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# profile.
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association.table = iasp91_scanloc
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# The locator type to use
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locator.type = LOCSAT
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# The locator profile to use
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locator.profile = iasp91_scanloc
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</pre></div>
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</div>
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<p>Alternatively, you may use the tables along with <span id="id6"><em>StdLoc</em> [<a class="reference internal" href="references.html#id306" title="StdLoc. SeisComP locator. URL: https://docs.gempa.de/seiscomp/current/apps/global_stdloc.html.">7</a>]</span>.</p>
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</section>
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<section id="application-in-other-modules">
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<h2>Application in other modules<a class="headerlink" href="#application-in-other-modules" title="Permalink to this heading">¶</a></h2>
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<p>In order to visualize the travel times or for using the tables in applications
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like <span id="id7"><em>scolv</em> [<a class="reference internal" href="references.html#id268" title="scolv. SeisComP module. URL: https://docs.gempa.de/seiscomp/current/apps/scolv.html.">24</a>]</span> add the tables to your global module configuration:</p>
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<div class="highlight-params notranslate"><div class="highlight"><pre><span></span>ttt.LOCSAT.tables = iasp91_scanloc
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LOCSAT.profiles = iasp91_scanloc
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</pre></div>
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</div>
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<p>More specific parameters may exist along with your application.</p>
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<h3><a href="../index.html">Table of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">Dense Travel-Time Tables</a><ul>
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<li><a class="reference internal" href="#application-in-scanloc">Application in scanloc</a></li>
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<li><a class="reference internal" href="#application-in-other-modules">Application in other modules</a></li>
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Release <b></b> version <b>2025.281#4efc2c878</b>
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© Copyright <a href="https://www.gempa.de">2014, gempa GmbH.</a>
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