Computer Science – Sound
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3822802p&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 22, CiteID L22802
Computer Science
Sound
1
Geodesy And Gravity: Atmosphere Monitoring With Geodetic Techniques (6952), Ionosphere: Ionospheric Disturbances
Scientific paper
The total electron content (TEC) measurements of the Global Navigation Satellite System (GNSS) revealed traveling ionospheric disturbances (TID) that locate North Korea's underground nuclear explosion (UNE) of 25 May 2009 to within about 3.5 km of its seismically determined epicenter. The random chance for this pattern of TIDs to register across the eleven GNSS stations is roughly 1 in 19 billion. Monte Carlo analysis of nearly 1,300 TIDs from a 7-station subset of the 11 GNSS stations supports the statistical strength of the array's signature. The UNE was also detected by seismic stations and possibly a local infrasound network of the International Monitoring System (IMS) of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO), but no radionuclide evidence was found. Thus, global GNSS infrastructure enables mapping spatial and temporal variations of TEC that augment and complement other methods of detecting and locating clandestine UNEs.
Gaya-Pique Luis R.
Grejner-Brzezinska Dorota A.
Morton Yu
Park Jihye
von Frese Ralph R. B.
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