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Control Segment | Global Positioning System (GPS)
Schriever Space Force Base - Wikipedia
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The Battle Between China And The US Over GPS Supremacy Is Being Built In Colorado | Colorado Public Radio
Colorado Springs, Colorado - Wikipedia
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City Council proclaims GPS Day > Air Force Space Command (Archived) > Article Display
Colorado Springs-controlled GPS satellites vital to U.S. economy, daily life | Military | gazette.com
GLOBAL POSITIONING SYSTEM Space Enterprise Council Capitol Hill Day 14 March 2008 Major Charlie Daniels, U.S. Air Force National Coordination Office. - ppt download
SMDC History: Kwajalein joins GPS system | Article | The United States Army
21st SOPS Det. 3, Kaena Point Tracking Station celebrates its 60th anniversary | Colorado Springs Military Newspaper Group