USA-176

USA-186 is an American Early warning satellite which was operated by the United States Air Force. Launched in February 2004, it is one of the last DSP Block 3 Early warning satellite.

Overview

The satellite launched on the Last Titan IV (402)B/IUS Version of the Titan IV rocket.
Defense Support Program is the Early warning satellite system of USAF which started launches since 1970 and was subsequently replaced by the Space-Based Infrared System satellite.