Air Force Space Surveillance System

Overview
The Air Force Space Surveillance System was a U.S. government multi-static radar system built to detect orbital objects passing over the U.S. It was a component of the U.S. space surveillance network, and according to the [U.S. Navy]] was able to detect basketball sized (29.5 inches (75 cm)) objects at heights up to 30,000 km (15,000 nautical miles.)

The system ceased operation in September 2013. Plans for a new space fence are underway with sites at the Kwajalein Atoll in the Marshall Islands, along with an option for another radar site in Western Australiax