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<blockquote data-quote="Channel Hopper" data-source="post: 766708" data-attributes="member: 175144"><p><em></em></p><p><em>The center will advise NASA when the satellite is two hours out from re-entering the Earth’s atmosphere, give or take 15 minutes,” said Air Force Maj. Michael Duncan, deputy chief of space situational awareness at the center.</em></p><p><em></em></p><p><em>“That 15 minutes,” he added, “could mean the difference of 7,000 miles [in distance] and where it penetrates the Earth’s atmosphere.”</em></p><p></p><p>_http://www.defense.gov/news/newsarticle.aspx?id=65429</p><p></p><p>The atmosphere altitude referred to is around 20 miles above the earth at the speeds the satellite is travelling at, which is where it becomes incandescent. 12 miles is where the object starts breaking up.</p><p></p><p>_http://www.aero.org/capabilities/cords/reentry-overview.html</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 766708, member: 175144"] [I] The center will advise NASA when the satellite is two hours out from re-entering the Earth’s atmosphere, give or take 15 minutes,” said Air Force Maj. Michael Duncan, deputy chief of space situational awareness at the center. “That 15 minutes,” he added, “could mean the difference of 7,000 miles [in distance] and where it penetrates the Earth’s atmosphere.”[/I] _http://www.defense.gov/news/newsarticle.aspx?id=65429 The atmosphere altitude referred to is around 20 miles above the earth at the speeds the satellite is travelling at, which is where it becomes incandescent. 12 miles is where the object starts breaking up. _http://www.aero.org/capabilities/cords/reentry-overview.html [/QUOTE]
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