Overview
Misawa is the only combined, joint service installation in the western Pacific. It houses three U.S. military services (Army, Navy, and Air Force), as well as the Japan Self-Defense Forces. The base is home to 5,200 US military personnel, as well as 350 US civilian employees and 900 Japanese national employees.
The Misawa Passive Radio Frequency space surveillance site was used for tracking satellites using the signals they transmit. It also provides coverage of geosynchronous satellites using the Deep Space Tracking System (DSTS) but has been dismantled around 2002. The Misawa Security Operations Center (MSOC), located in the northwestern part of the Air Base, is believed to be one of the largest ECHELON ground stations.
Read more about this topic: Misawa Air Base