Glossary

On-Site Inspection

Inspectors collect information directly on site at the alleged (or suspected) site of an explosion. This might help to confirm whether or not a nuclear explosion has been carried out in violation of the Treaty. Part of the Verification Regime of the CTBT, on-site inspections constitute the final verification measure of the CTBT.

On-site Inspections

Inspectors collect information directly on site at the alleged (or suspected) site of an explosion. This might help to confirm whether or not a nuclear explosion has been carried out in violation of the Treaty. Part of the Verification Regime of the CTBT, on-site inspections constitute the final verification measure of the CTBT.

OPANAL

Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean

Operation Storax

The name given to a series of peaceful nuclear tests conducted by the United States between 1962 and 1963, which were part of the “Plowshare Program”. Conceived in 1957, the Plowshare Program was established by the United States Atomic Energy Commission as a research and development activity to explore the technical and economic feasibility of using nuclear explosives for industrial applications. The reasoning was that the relatively inexpensive energy available from nuclear explosions could be used for a wide variety of peaceful purposes. However, none of the Plowshare tests were ever actually used for commercial purposes.  
Operation Storax was concluded before the signing of the Partial Test Ban Treaty on 5 August 1963, and included the last U.S. atmospheric tests of any description (the last zero-yield plutonium dispersal test, Roller Coaster Clean Slate III, was fired on 9 June 1963). The majority of the Storax tests were conducted underground. The most famous test was the 1962 Sedan blast, which consisted of a 104-kiloton bomb buried 635 feet below the Earth's surface. Sedan was an excavation experiment to determine the feasibility of using nuclear explosions for large excavation projects such as harbours and canals.

Operation temperature

The temperature at which the seismic collection and processing equipment must work. At many seismic stations, the temperatures can be extremely hot or cold because of the remote nature of the sites.

OSI

Same as On-Site Inspection

Outer Space Treaty

Prohibits nuclear testing, as well as the placement of any weapons of mass destruction in outer space, including in orbit around the earth, on the moon or any other celestial body. The "Treaty on Principles Governing the Activities of States in the Exploration and use of Outer Space, Including the Moon and other Celestial Bodies" also stipulates that the exploration and use of outer space be carried out for the benefit and in the interest of all countries, and that the moon and other celestial bodies are to be used exclusively for peaceful purposes. It was opened for signature on 27 January 1967, and entered into force on 10 October 1967. As of March 2008, 100 countries were States Parties to the treaty.