Launch probability: 90%

This is the fourth satellite in the Advanced Extremely High Frequency (AEHF) system, which is a series of communications satellites operated by the United States Air Force Space Command. It provides global, survivable, protected communications capabilities for strategic command and tactical warfighters operating on ground, sea and air platforms.

Mission type: Communications · Orbit: Geostationary Transfer Orbit

Rocket: Atlas V 551 · Provider: United Launch Alliance