The system cost more than USD $160 billion over one year to deploy and was made up of 288 satellites that formed a complete grid over Earth. They were powered by heavy Liquid Naquadah and used subatomic particles focused into a very fine beam of destructive energy. The design made the weapon pinpoint-accurate, leaving no residual radiation or damage outside its intended target. As this weapon was created only in a dream environment, its true viability is unknown. (SG1: "Absolute Power")