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<span class="version">5.3.0</span>
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<div class="section" id="get-real-time-data-from-a-remote-seedlink-server-single-station">
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<span id="tutorials-waveforms"></span><h1>Get real-time data from a remote Seedlink server (single station)<a class="headerlink" href="#get-real-time-data-from-a-remote-seedlink-server-single-station" title="Permalink to this headline">¶</a></h1>
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<p>You will use <strong class="program">scconfig</strong> to add waveforms for a single station
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which is already in inventory.</p>
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<p>Pre-requisites for this tutorial:</p>
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<ul class="simple">
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<li><p><a class="reference internal" href="postinstall.html#tutorials-postinstall"><span class="std std-ref">Installation</span></a></p></li>
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<li><p>Inventory for the station already loaded.</p></li>
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</ul>
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<p>Afterwards/Results/Outcomes:</p>
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<ul class="simple">
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<li><p><strong class="program">slinktool -Q</strong> locally shows the station’s streams are available.</p></li>
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</ul>
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<p>Time range estimate:</p>
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<ul class="simple">
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<li><p>10 minutes</p></li>
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</ul>
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<p>Related tutorial(s):</p>
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<ul class="simple">
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<li><p><a class="reference internal" href="archiving.html#tutorials-archiving"><span class="std std-ref">Set up local waveform archiving</span></a></p></li>
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<li><p><a class="reference internal" href="servefdsnws.html#tutorials-servefdsnws"><span class="std std-ref">Enable local FDSNWS server</span></a></p></li>
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<li><p><a class="reference internal" href="addstation.html#tutorials-addstation"><span class="std std-ref">Add a new station</span></a></p></li>
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</ul>
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<hr class="docutils" />
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<p>We suppose there is an upstream Seedlink server, such as that
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from GEOFON, IRIS, or some other public source.</p>
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<div class="section" id="check-data-are-available">
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<h2>Check data are available<a class="headerlink" href="#check-data-are-available" title="Permalink to this headline">¶</a></h2>
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<p>First, we’ll query the upstream Seedlink server,
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to confirm that it has current data.
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We do this with SeisComP’s <strong class="program">slinktool</strong> command,
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giving it the ‘-L’ option to list the available stations.
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For this example, we’ll use the server at host <cite>geofon.gfz-potsdam.de</cite>
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on port 18000 (the default)</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ slinktool -L geofon.gfz-potsdam.de
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AW VNA1 VNA1
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AW VNA2 VNA2
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[..]
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GR BSEG BSEG
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GR BUG BUG
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GR CLL CLL
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GR CLZ CLZ
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[..]
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</pre></div>
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</div>
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<p>This can be a long list. It shows the network code and station code of each
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of the stations for which data is available from this Seedlink server.
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We can restrict the output to our station of interest using <cite>grep</cite>.</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ slinktool -Q geofon.gfz-potsdam.de | grep GR.CLL
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GR CLL LHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:15:28.0299
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GR CLL BHZ D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:13.1300
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GR CLL BHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:15.4300
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GR CLL HHE D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:50.3450
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GR CLL HHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:52.4650
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GR CLL HHZ D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:53.6850
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GR CLL LOG L 2020/05/06 15:13:41.2249 - 2020/05/06 19:59:53.3850
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GR CLL BHE D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:08.9300
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[..]
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</pre></div>
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</div>
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<p>The ‘-Q’ option provides a formatted stream list,
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with one line for each stream available from the server.
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The columns are: network code, station code, location code (which may
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be empty) and channel code, a flag, and then the (UTC) time of the
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first and last data available at the server.
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(The <cite>grep</cite> command here is used to limit output to just those CLL streams;
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without it, this server provides thousands of lines of output.)</p>
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<p>For an active station the last data time (shown on the
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right) will be very recent.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p><strong>(Advanced)</strong>
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You can restrict who has access to a station’s data (from your server)
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in your Seedlink bindings.
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This sets the <a class="reference internal" href="../../apps/seedlink.html#confval-access"><code class="xref std std-confval docutils literal notranslate"><span class="pre">access</span></code></a> variable in your <code class="file docutils literal notranslate"><span class="pre">seedlink.ini</span></code> file.
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This can be done for all stations, or per station.
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The documentation for <strong class="program">seedlink</strong> gives details.</p>
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</div>
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</div>
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<div class="section" id="configure-bindings">
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<h2>Configure bindings<a class="headerlink" href="#configure-bindings" title="Permalink to this headline">¶</a></h2>
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<p>In <strong class="program">scconfig</strong>, under the Bindings tab:</p>
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<ol class="arabic simple">
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<li><p>Create a <em>seedlink</em> profile named “geofon”, named after the upstream server.</p>
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<ul class="simple">
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<li><p>Double click on the profile.</p></li>
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<li><p>Select the ‘chain’ plugin for the souce from the drop-down menu</p></li>
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<li><p>To add the plugin click on the green “plus” button on the left. Name it anything or even leave the name blank.</p></li>
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<li><p>Open this and set the name of the server (<a class="reference internal" href="../../apps/slmon.html#confval-address"><code class="xref std std-confval docutils literal notranslate"><span class="pre">address</span></code></a>)
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and its TCP port, <a class="reference internal" href="../../apps/slmon.html#confval-port"><code class="xref std std-confval docutils literal notranslate"><span class="pre">port</span></code></a>. Normally you leave the port at 18000 which is the default.</p></li>
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<li><p>If you wish to limit the data requested to particular channels,
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based on channel or location code,
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set Seedlink’s <a class="reference internal" href="../../apps/seedlink.html#confval-sources.chain.selectors"><code class="xref std std-confval docutils literal notranslate"><span class="pre">selectors</span></code></a> to “BH?.D” say
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for fetch all BH stream and no auxiliary streams. Add the location code without
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a space to limit by location as well, e.g. 00BH?.D. You may add a comma-separated
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list of streams, e.g. “00BH?.D, 10BH?.D”.
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Otherwise you will be requesting all streams available for this
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station, potentially wasting bandwidth and slowing your system.
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No other changes are normally necessary.</p></li>
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</ul>
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</li>
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<li><p>Drag and drop this profile from the right side to the network icon on the
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left side (you may do that also at the station level)
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to apply it to your station.</p></li>
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<li><p>Press Ctrl+S to save the configuration.
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This writes configuration files in <code class="file docutils literal notranslate"><span class="pre">~/seiscomp/etc/key</span></code>.</p></li>
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</ol>
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</div>
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<div class="section" id="update-the-configuration">
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<h2>Update the configuration<a class="headerlink" href="#update-the-configuration" title="Permalink to this headline">¶</a></h2>
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<p>The SeisComP database must already be updated with the inventory
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(see Tutorial <a class="reference internal" href="addstation.html#tutorials-addstation"><span class="std std-ref">Add a new station</span></a>).
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SeisComP’s modules then require restarting to load the updated information.</p>
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<ul>
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<li><p>Go to the System tab and press ESC (the Escape key, to de-select all modules).</p>
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<ol class="arabic simple">
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<li><p>Click on “Update configuration”, at the right of the window.
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(<strong>Not</strong> “Refresh”, - that just refreshes <strong class="program">scconfig</strong>’s
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display of what is running!)</p></li>
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<li><p>Press <em>Start</em> to start acquiring data from the already configured stations.</p></li>
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</ol>
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</li>
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<li><p>Alternatively, at the command line:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ seiscomp update-config seedlink
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$ seiscomp restart seedlink
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</pre></div>
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</div>
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</li>
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</ul>
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</div>
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<div class="section" id="check-it-works">
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<h2>Check it works<a class="headerlink" href="#check-it-works" title="Permalink to this headline">¶</a></h2>
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<ul>
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<li><p>To confirm that you have waveform data for the station locally,
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run</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">slinktool</span> <span class="o">-</span><span class="n">Q</span> <span class="n">localhost</span>
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</pre></div>
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</div>
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</li>
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</ul>
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</div>
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<div class="section" id="further-steps">
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<h2>Further steps<a class="headerlink" href="#further-steps" title="Permalink to this headline">¶</a></h2>
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<p>At this point,
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you can follow the same procedure for other networks/stations, provided you</p>
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<ol class="arabic simple">
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<li><p>Have metadata available. You may follow the tutorial <a class="reference internal" href="addstation.html#tutorials-addstation"><span class="std std-ref">Add a new station</span></a>.</p></li>
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<li><p>Know the location of a Seedlink server for, and have access to, the waveforms.</p></li>
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</ol>
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</div>
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</div>
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<h3 id="searchlabel">Quick search</h3>
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<li><a class="reference internal" href="#">Get real-time data from a remote Seedlink server (single station)</a><ul>
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