Airborne early warning and control
WADS operates a Sector Operations Control Center (SOCC) at McChord AFB, as part of the Joint Surveillance System (JSS) which had replaced SAGE in 1983. This system enjoins state-of-the-art air defense systems and cutting-edge computer technology to significantly increase surveillance and identification capabilities, and better protect the nation's airways from intrusion and attack. It relies on digitized radar inputs from Air Route Surveillance Radar (ARSR) sites jointly operated by the Federal Aviation Administration and the Air Force, and tethered aerostat radar balloons. It is fully integrated with the E-3A Airborne early warning and control (AEW&amp;C) system and the Joint Surveillance Target Attack Radar System (E-8 Joint STARS).