</span>
<span id="cb4-46"><a href="#cb4-46" tabindex="-1"></a><span class="co">#&gt; </span></span>
<span id="cb4-47"><a href="#cb4-47" tabindex="-1"></a><span class="co">#&gt; $dDot</span></span>
<span id="cb4-48"><a href="#cb4-48" tabindex="-1"></a><span class="co">#&gt; [1] -0.08599694</span></span></code></pre></div></li>
</ol>
</div>
<div id="citations" class="section level1">
<h1>Citations</h1>
<ol style="list-style-type: decimal">
<li><p>NOAA NCEI Geomagnetic Modeling Team, British Geological Survey,