<?xml version="1.0" encoding='utf-8'?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1" title="Tracking and Data Relay Satellite System - Page 6 - Wikipedia">
<p>
<a accesskey="1" href="page.php?w=Tracking_and_Data_Relay_Satellite_System&amp;p=5">1.Previous</a><br />
<a accesskey="3" href="page.php?w=Tracking_and_Data_Relay_Satellite_System&amp;p=7">3.Next</a>
</p>
<p>of data collection from deep space probes.</p>

<p>With the creation of the <a href="page.php?w=Space_Shuttle">Space Shuttle</a> in the mid-1970s, a requirement for a higher performance space-based communication system arose. At the end of the Apollo program, NASA realized that MSFN and STADAN had evolved to have similar capabilities and decided to merge the two networks to create the <a href="page.php?w=STDN">Spacecraft Tracking and Data Network</a> (STDN).</p>

<p>Even after consolidation, STDN had some drawbacks. Since the entire network consisted</p><p>
<a accesskey="1" href="page.php?w=Tracking_and_Data_Relay_Satellite_System&amp;p=5">1.Previous</a><br />
<a accesskey="3" href="page.php?w=Tracking_and_Data_Relay_Satellite_System&amp;p=7">3.Next</a>
</p>

<do type="prev" label="Search">
        <go href="search.wml"/>
</do>

</card>
</wml>
