2014 – U.S. Missile Defense

The U.S. Missile Defense Agency’s (MDA’s) two Space Tracking and Surveillance System-Demonstrator (STSS-D) satellites remained fairly quiet in 2014. Launched in September 2009, the satellites continue to circle the Earth at an altitude of 1,350 kilometers (840 miles). The satellites can track a...

This article is for subscribers. Please sign up for a subscription or login below.