Обзор военных спутниковых программ США - из первоисточника

Two programs critical to providing SSA data to the JMS are the Space Fence and SBSS (Space-Based Space Surveillance). The Space Fence is a three station, worldwide, radar system to detect and track smaller sized space objects, while the SBSS satellite is an optical system to search, detect, and track objects in earth orbit, particularly those in geosynchronous orbit. The Space Fence replaces the Air Force Space Surveillance System (AFSSS) and SBSS builds upon our success with the Space Based Visible (SBV) technology demonstration. In the FY2010 budget, the Space Fence program will complete a System Design Review and the SBSS program will support on-orbit operations of SBSS Block 10 which is expected to launch this summer.