Underground nuclear testing track down from the ionosphere

Scientists have made a way to detect underground nuclear tests on the basis of the analysis they cause disturbances in the ionosphere. Details of the creators reported at the conference of the South American Geophysical Union, and its short content leads ScienceNow.
The method involves the analysis of data on the signal delay between the Global Positioning System satellites. They can have various causes, including the spread of wave disturbances in the ionosphere caused by the nuclear tests. Initial, fashion creators worked hard to eliminate noise in the links between satellites GPS, but soon enough it became clear that the noise analysis can be independent.
As a test method, researchers analyzed satellite data during the last 2-U.S. nuclear tests conducted in 1992. Eliminating the flow of daily fluctuations and noise caused by the rotation of the satellites themselves, the researchers were able to find distribution in the ionosphere disturbance waves (TID). Comparing data from different satellites, they managed to locate the epicenter of the nuclear tests with an error not exceeding 4 km.
A similar method of analysis was conducted on data located in New Mexico is a very big telescope (VLT). This set of radio telescopes is also sensitive to perturbations in the ionosphere and can complement satellite data GPS.
Available detection methods based on the first analysis of seismic vibrations caused by explosions in the earth’s crust, also on the search for radioactive of infection.
Nuclear tests in all forms were banned suitable contract Assembly of the UN in 1996. Yet, this did not prevent conduct underground nuclear explosions in India and Pakistan in 1998. Later they were joined by North Korea, which conducted tests in 2006 and 2009.

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