<div dir="ltr">Interesting read if you're in to the tech behind how GPS works:<br><br><a href="https://www.sciencedaily.com/releases/2016/02/160211111507.htm">https://www.sciencedaily.com/releases/2016/02/160211111507.htm</a><br clear="all"><div><div><div class="gmail_signature"><div dir="ltr"><br><span style="color:rgb(0,0,255)"><b>Rob</b></span><br></div></div></div>
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