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<section id="waveform-archives">
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<span id="concepts-waveformarchives"></span><h1>Waveform archives<a class="headerlink" href="#waveform-archives" title="Permalink to this heading">¶</a></h1>
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<section id="scope">
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<h2>Scope<a class="headerlink" href="#scope" title="Permalink to this heading">¶</a></h2>
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<p>This chapter describes waveform archives for long-term storage of miniSEED data.</p>
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</section>
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<section id="overview">
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<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this heading">¶</a></h2>
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<p>While real-time data sources provide data for a rather short amount of time,
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long-term access to waveforms can be established through waveform archives.
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The <a class="reference internal" href="recordstream.html#concepts-recordstream"><span class="std std-ref">RecordStream interface</span></a> allows a combined access
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to real-time data and data in <a class="reference internal" href="#concepts-sds"><span class="std std-ref">SDS</span></a> or other archives.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>It is assumed that instrument corrections applied to the recorded
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waveform data result in data in units of the real observations and their unmodified value.
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Therefore, it is recommended to store only unprocessed raw data in units of digital counts
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in the waveform archives and to provide the complete <a class="reference internal" href="inventory.html#concepts-inventory"><span class="std std-ref">inventory</span></a>
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referring to input data given in counts.</p>
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</div>
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</section>
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<section id="sds-archives">
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<span id="concepts-sds"></span><h2>SDS archives<a class="headerlink" href="#sds-archives" title="Permalink to this heading">¶</a></h2>
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<p>SeisComP uses the SeisComP Data Structure (SDS) for archiving miniSEED waveform data.
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It has the structure:</p>
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<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>archive
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<span class="w"> </span>+<span class="w"> </span>year
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<span class="w"> </span>+<span class="w"> </span>network<span class="w"> </span>code
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<span class="w"> </span>+<span class="w"> </span>station<span class="w"> </span>code
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<span class="w"> </span>+<span class="w"> </span>channel<span class="w"> </span>code
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<span class="w"> </span>+<span class="w"> </span>one<span class="w"> </span>file<span class="w"> </span>per<span class="w"> </span>day<span class="w"> </span>and<span class="w"> </span>location,<span class="w"> </span>e.g.<span class="w"> </span>NET.STA.LOC.CHAN.D.YEAR.DOY
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</pre></div>
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</div>
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<p>SeisComP ships with <a class="reference internal" href="../../apps/slarchive.html#slarchive"><span class="std std-ref">slarchive</span></a> to create SDS archives from a miniSEED waveform
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buffer by <a class="reference internal" href="../../apps/seedlink.html#seedlink"><span class="std std-ref">seedlink</span></a> in real time and with <a class="reference internal" href="../../apps/scart.html#scart"><span class="std std-ref">scart</span></a> to intergrate miniSEED
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records from files into an SDS archive. <a class="reference internal" href="../../apps/scart.html#scart"><span class="std std-ref">scart</span></a> can also be used to retrieve
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miniSEED records from an SDS archive.</p>
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</section>
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<section id="access-to-waveform-archives">
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<h2>Access to waveform archives<a class="headerlink" href="#access-to-waveform-archives" title="Permalink to this heading">¶</a></h2>
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<p>Access from SeisComP processing and GUI modules to waveform archives is realized by
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<a class="reference internal" href="recordstream.html#concepts-recordstream"><span class="std std-ref">RecordStream implementations</span></a>.
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The continuity of SDS archives can be monitored by <a class="reference internal" href="../../apps/scardac.html#scardac"><span class="std std-ref">scardac</span></a> and exposed by
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the <a class="reference internal" href="../../apps/fdsnws.html#fdsnws"><span class="std std-ref">fdsnws availability feature</span></a>.
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miniSEED waveforms in SDS archives, can interactively retrieved using <a class="reference internal" href="../../apps/scart.html#scart"><span class="std std-ref">scart</span></a>.
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Waveforms stored in SDS archives can be served to clients, e.g. using <a class="reference internal" href="../../apps/fdsnws.html#fdsnws"><span class="std std-ref">fdsnws</span></a>.</p>
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</section>
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<section id="related-modules">
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<h2>Related modules<a class="headerlink" href="#related-modules" title="Permalink to this heading">¶</a></h2>
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<ul class="simple">
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<li><p><span class="xref std std-ref">caps_plugin</span></p></li>
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<li><p><a class="reference internal" href="../../apps/fdsnws.html#fdsnws"><span class="std std-ref">fdsnws</span></a></p></li>
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<li><p><a class="reference internal" href="../../apps/scardac.html#scardac"><span class="std std-ref">scardac</span></a></p></li>
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<li><p><a class="reference internal" href="../../apps/scart.html#scart"><span class="std std-ref">scart</span></a></p></li>
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<li><p><a class="reference internal" href="../../apps/slarchive.html#slarchive"><span class="std std-ref">slarchive</span></a></p></li>
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<h3><a href="../../index.html">Table of Contents</a></h3>
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<li><a class="reference internal" href="#">Waveform archives</a><ul>
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<li><a class="reference internal" href="#scope">Scope</a></li>
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<li><a class="reference internal" href="#overview">Overview</a></li>
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<li><a class="reference internal" href="#sds-archives">SDS archives</a></li>
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<li><a class="reference internal" href="#access-to-waveform-archives">Access to waveform archives</a></li>
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