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The Ground Network (GN) Project manages the Ground Network used to provide tracking, communications, and data system services to customers identified in the NASA mission set. The Ground Network provides services to orbital spacecraft, and the Space Shuttle (including pre-flight, launch, orbital, landing, and post flight activities). Customers include the NASA Earth Science, Space Science, and Human Explorations and Development of Space Enterprises, as well as other government agencies, international civilian space agencies, and commercial entities. The Ground Network Project integrates a diverse set of resources to provide high quality services at the lowest cost to NASA. These resources include NASA owned orbital tracking systems, commercial orbital tracking stations, scheduling systems, and test systems.