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<p>approximately 50 km apart.<br/>
*<a href="page.php?w=Communications_satellite">Communications satellite</a>s&nbsp;- Satellites communicate via microwave radio waves, which are not deflected by the Earth's atmosphere. The satellites are stationed in space, typically in <a href="page.php?w=geostationary_orbit">geostationary orbit</a> 35786 km above the equator. These Earth-orbiting systems are capable of receiving and relaying voice, data, and TV signals.<br/>
*<a href="page.php?w=Cellular_network">Cellular</a> and PCS systems use several radio</p><p>
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