MDA STSS ATRR Satellite Transfers to AF Space CommandOperational and administrative control of the Space Tracking and Surveillance System Advanced Technology Risk Reduction (STSS ATRR) satellite has been transferred to Air Force Space Command (AFSPC) effective 31 January 2011. In addition to successfully demonstrating required on orbit system performance parameters for a prototype sensor technology, STSS ATRR has been conducting Space Situational Awareness (SSA) and related operations on an as-capable basis. As an AFSPC system, STSS ATRR will continue operations supporting the Space Situational Awareness (SSA) mission area.
STSS ATRR was launched 5 May 2009 from Vandenberg Air Force Base. STSS ATRR is a small experimental satellite that served as a pathfinder for prototype sensor technology and future MDA space missions.
Source : Missile Defense Agency (MDA)