Glossary Airburst The explosion of a nuclear weapon at such a height that the expanding fireball does not touch the earth’s surface prior to the time the fireball reaches its maximum luminosity. The airburst reported in this documentresulted from the detonation of a device fired from a 280mm cannon. Airdrop A nuclear device dropped from an aircraft and exploded in the atmosphere. Atmospheric A test conducted aboveground or above water; i.e., in the open air. Balloon A nuclear device suspended from a balloon and exploded in the atmosphere. Barge A nuclear device exploded from a barge mooredin the lagoon at Enewetak or Bikini. Crater A nuclear device placed shallow enough underground to produce a throw-out of earth when exploded. Joint US-UK A nuclear test conducted jointly by the United States and the United Kingdom under a cooperative agreement in kt A kiloton. The energy of a nuclear explosion that is equivalent to an explosion of 1,000 tons of TNT. MT A megaton. The energy of a nuclear explosion that is equivalent to an explosion of one miflion tons of TNT. NTS The Nevada Test Site, a 3,510-square-kilometer (1,350-square-mile) area in southern Nevada in Nye County and about 104 kilometers (65 miles) northwest of Las Vegas. Off Site Off site is any place outside the Test Range Complex, an area that includes both the Nevada Test Site and the On Site A notation that radioactivity was detected on site only is made for any test from which there was an unplanned release of radioactivity into the atmosphere that was not detectable beyond the boundaries of the Test Range Complex. Piowshare Application of nuclear explosives to develop peaceful uses for atomic energy. The program is no longeractive. Rocket A nuclear device launched by rocket and exploded in the atmosphere. Safety Experiment Experiment designed to confirm a nuclear explosion will not occur in case of an accidental detonation of the explosive associated with the device. effect between the two countries since August 4, 1958. adjacent Government-controlled Nellis Air Force Range. vi