Download or read book Nuclear Explosion and Infrasound Event Resources of the SMDC Monitoring Research Program written by and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Research and Development Support Services (RDSS) project of the Space and Missile Defense Command (SMDC) provides a range of resources and services for use in nuclear explosion monitoring R&D. This presentation focuses on some recent enhancements to the infrasound, seismic, and hydroacoustic resources, which can be accessed from the RDSS website at http://www.rdss.info. In particular, ongoing developments and improvements are related to (1) the nuclear explosion database (NEDB) and (2) infrasound signals and associated source information. The RDSS project has traditionally maintained an archive of information on source parameter data and waveforms from worldwide nuclear explosions. A major revision and update of the NEDB includes newly published or revised source information about historical explosions, access to additional or corrected waveform data for some explosions, and new data from more recent nuclear tests (viz., North Korea). New web tools for accessing the NEDB archive include GoogleMap visualization of alternative event locations, displays of recording station information (e.g., data availability and station parameters), seismic travel time residual displays, and new waveform display and retrieval options, which include options for simple prefiltering and signal rescaling during data review prior to download. Identification of infrasound events for the RDSS infrasound database has continued. The effort is based primarily on seismic-event bulletins, volcanic activity reports, meteor observations, announcements on rocket launches and information appearing in the news media. The search for infrasound signals associated with events in these reports and bulletins is utilizing the automatic detection lists of International Monitoring System (IMS) stations augmented with the processing of waveform data from the SMDC waveform archive.

Download or read book Monitoring the Comprehensive Nuclear Test Ban Treaty Data Processing and Infrasound written by Zoltan A. Der and published by Springer Science & Business Media. This book was released on 2002-05-01 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: On September 10, 1996, The United Nations General Assembly adopted the Copmprehensive Nuclear-Test-Ban Treaty (CTBT), prohibiting nuclear explosions worldwide, in all environments. The treaty calls for a global verification system, including a network of 321 monitoring stations distributed around the globe, a data communications network, an international data center (IDC), and on-site inspections, to verify compliance. This volume presents certain recent research results pertaining on methods used to process data recorded by instruments of the International Monitoring System (IMS) and addressing recording infrasound signals generated by atmospheric explosions. Six papers treating data processing provide an important selection of topics expected to contribute to improving our ability to successfully monitor a CTBT. Five papers concerning infrasound include descriptions of ways in which that important research area can contribute to CTBT monitoring, the automatic processing of infrasound data, and site conditions that serve to improve the quality of infrasound data.

Download or read book The Pacific Infrasound Event of April 23 2001 written by and published by . This book was released on 2001 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past several years, the Defense Threat Reduction Agency's (DTRA) Center for Monitoring Research (CMR) in Arlington, Virginia, has been developing and testing software to extend the International Data Centre nuclear explosion monitoring system to include infrasound monitoring of the atmosphere. This system can form infrasound-only events, or form fused events using any combination of infrasound, seismic, and hydroacoustic data. Evaluation of the performance of the infrasound processing system is hampered by the scarcity of major infrasound events. On April 23, 200, a significant infrasound event occurred, providing a good test case for the system. Signals from this event, subsequently confirmed by optical observations to be a bolide impact over the Northern Pacific Ocean, were recorded on a number of infrasonic arrays in North America and Hawaii. Using arrival information from several International Monitoring System (IMS) infrasound arrays, an acoustic-only event was built automatically as part of standard event processing at the Prototype International Data Center (PIDC). After optical confirmation it was determined that the infrasound and optical locations differed by 3 minutes in origin time and 80 km in location, which is within the estimated error of the infrasound location. This paper presents the Prototype IDC analysis of this event and the subsequent studies undertaken at CMR to refine the hypothesized source location and evaluate the infrasound processing system.

Download or read book Seismological Research Letters written by and published by . This book was released on 1987* with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Infrasound and the Infrasonic Monitoring of Atmospheric Nuclear Explosions A Literature Review written by J. McKisic and published by . This book was released on 1997 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews unclassified past work in infrasound and atmospheric acoustics deemed relevant to current interests in monitoring compliance with a CTBT(Comprehensive Test Ban Treaty). The report is one of four resulting from a DOE sponsored seventeen month investigation and review of past work in infrasound. The purpose of the report is to update previous reviews and to provide members of the research and development and governmental policy making communities, with an interest in or responsibility for monitoring compliance to CTBT, with a thorough and relatively self-contained document summarizing the primary essentials of current and past work in infrasonic research. Following a background section, the report reviews: (1) the measurement of infrasound; (2) early work in infrasound and atmospheric acoustics; (3) propagation and explosive source modeling; (4) various natural and man made sources of infrasound and (5) data and waveforms from a number of nuclear and chemical explosions. The report contains one Appendix which provides waveforms of atmospheric nuclear explosions recorded on Columbia University's Lamont-Doherty Laboratory's microbarograph arrays as originally published by Donn and Ewing (1967).

Download or read book Infrasound and Infrasonic Monitoring of Atmospheric Nuclear Explosions Past Monitoring Efforts written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of an unclassified review and discussion of past U.S. programs directed toward the infrasonic monitoring of atmospheric nuclear explosions. In brief, the U.S. monitored virtually all atmospheric nuclear explosions conducted by China, France, the former Soviet Union and the United States. The first nuclear explosion to be infrasonically monitored was the 21 KT air-dropped Able test which was conducted at the Bikini test site in the south-Pacific on June 30, 1946, and the last nuclear explosion which was infrasonically monitored was the 3 MT Chinese test which occurred on November 17, 1976. The review of the detection performance of continental stations used to monitor U.S. tests at the NTS indicates that maximum detection ranges for explosions of - 1 KT can vary from 1350 km to 3585 km depending on the noise levels at a particular station and on the environmental conditions along the propagation path. In addition, recent work utilizing still classified data acquired during the existence of the USAEDS infrasound program as well as other independent estimates is discussed which indicates that a proposed 60 station infrasound network can ensure detection of a 1 KT atmospheric test with a location uncertainty of 100 km over most of the earth.

Download or read book Recent Advances in Nuclear Explosion Monitoring written by Martin B Kalinowski and published by Birkhäuser. This book was released on 2015-02-04 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a follow-up of PAGEOPH Topical Volume 167 (2010) and again reports on the latest advances in science and technology that have been achieved to monitor compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). This progress in the development and testing of new sensor technologies and analysis methodologies in all relevant scientific disciplines improves the detection, location and characterization of CTBT-relevant events. In particular the latter poses a challenge for smaller events, where natural or manmade but CTBT-irrelevant sources can generate false positive events. Being able to effectively identify these events while maintaining a minimum risk of missing a nuclear explosion is the overall challenge. The 29 papers in this volume can be structured into 16 waveform studies, eight contributions in the field of radionuclide monitoring and related atmospheric backtracking and five papers related to on-site inspection or overhead detection of relevant events, with many of these originally presented at a special session on “Research and Development in Nuclear Explosion Monitoring” at the most recent annual General Assemblies of the European Geosciences Union (EGU). The volume addresses the interests of scientists and practitioners whose work is related to the CTBT relevant applications and technologies in the fields of seismology, hydro-acoustics, infra-sound, meteorology and nuclear physics.

Download or read book Monitoring Underground Nuclear Explosions written by Ola Dahlman and published by Elsevier. This book was released on 2016-10-27 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring Underground Nuclear Explosions focuses on the checking of underground nuclear explosions, including the Comprehensive Test Ban Treaty (CTB), seismological stations, earthquake-source models, and seismicity. The publication first elaborates on test-ban negotiations, nuclear explosions, seismological background, and explosions and earthquakes as seismic sources. Concerns cover comparison between explosion-source and earthquake-source models, theoretical calculation of seismic waves, earth structure, seismicity, nuclear test activities, bomb designs, and disarmament treaties. The manuscript then tackles seismological stations, detection, event definition and location, depth estimation, and identification. Topics include multistation discriminants, statistical aspects, long-period and short-period signals, near distances, location by a network of stations, international data exchange, station detection capabilities, and station networks. The book examines the monitoring of a comprehensive test-ban treaty, nonseismological identification, evasion, peaceful nuclear explosions, and yield estimation. The text is a dependable reference for researchers interested in the monitoring of underground nuclear explosions.

Download or read book Recent Advances in Nuclear Explosion Monitoring written by Andreas Becker and published by Birkhäuser. This book was released on 2010-06-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This topical volume focuses on the most recent advances that have been achieved in relevant fields of research of nuclear test ban monitoring, including seismology, infrasound- and hydro-acoustics, as well as nuclear physics and atmospheric backtracking. This research has been presented during the special sessions on "Research and Development in Nuclear Explosion Monitoring" convened during the 2007 and 2008 General Assemblies of the European Geosciences Union (EGU). The special sessions were introduced after the Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization (CTBTO Prepcom) had convened a scientific symposium in 2006 on "CTBT: Synergies with Science 1996-2006 and beyond" marking the tenth anniversary of the United Nations General Assembly’s adoption of the CTBT Treaty. With regard to the seismo-acoustic fields several papers provide important updates on advances made in these fields since publication of ‘Monitoring the Comprehensive Nuclear-Test-Ban Treaty’ (see PAGEOPH topical volumes 158-159, 2001-2002). Moreover, this topical volume expands on these publications by including radionuclide and noble gas monitoring, as well as atmospheric transport modeling. In these two areas, significant progress has been made in recent years. Two papers studying the 2006 North Korean nuclear test elucidate how progress made in the relevant fields has allowed for a good understanding on the characteristics of this underground nuclear test.

Download or read book Monitoring the Comprehensive Nuclear Test Ban Treaty Seismic Event Discrimination and Identification written by William R. Walter and published by Springer. This book was released on 2013-04-18 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: In September 1996, the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty (CTBT), prohibiting nuclear explosions worldwide, in all environments. The treaty calls for a global verification system, including a network of 321 monitoring stations distributed around the globe, a data communications network, an international data center, and onsite inspections, to verify compliance. The problem of identifying small-magnitude banned nuclear tests and discriminating between such tests and the background of earthquakes and mining-related seismic events, is a challenging research problem. Because they emphasize CTBT verification research, the 12 papers in this special volume primarily addresses regional data recorded by a variety of arrays, broadband stations, and temporarily deployed stations. Nuclear explosions, earthquakes, mining-related explosions, mine collapses, single-charge and ripple-fired chemical explosions from Europe, Asia, North Africa, and North America are all studied. While the primary emphasis is on short-period, body-wave discriminants and associated source and path corrections, research that focuses on long-period data recorded at regional and teleseismic distances is also presented Hence, these papers demonstrate how event identification research in support of CTBT monitoring has expanded in recent years to include a wide variety of event types, data types, geographic regions and statistical techniques.

Download or read book Nuclear Test Ban written by Ola Dahlman and published by Springer Science & Business Media. This book was released on 2009-04-21 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear tests have caused public concern ever since the first such test was conducted, more than six decades ago. During the Cold War, however, con- tions were not conducive to discussing a complete ban on nuclear testing. It was not until 1993 that negotiations on such a treaty finally got under way. From then on, things moved relatively quickly: in 1996, the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty (CTBT). To date, the Treaty has been signed by 178 states and ratified by 144, though it has yet to enter into force, as nine out of 44 ‘‘Annex 2 states’’, whose ratification is mandatory, have not heeded the call. Nevertheless, the CTBT verification system is already provisionally operational and has proven its effectiveness. We commend the CTBT organisation in Vienna for its successful efforts to build a verification network. This book is an excellent overview of the evolution of the CTBT and its verification regime. The authors are eminent scholars from the Netherlands, Norway and Sweden who have been intimately involved with the CTBT and its verification agency, the CTBTO Preparatory Commission, from their inc- tion to the present day. They have written a thorough and engaging narrative of the long road that led to the CTBT. Their story will appeal to both the layman and the expert and provide useful lessons for future negotiations on disarmament issues.

Download or read book Proceedings of the 29th Monitoring Research Review written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain papers prepared for the 29th Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, held 25-27 September, 2007 in Denver, Colorado. These papers represent the combined research related to ground-based nuclear explosion monitoring funded by the National Nuclear Security Administration (NNSA), Air Force Technical Applications Center (AFTAC), Air Force Research Laboratory (AFRL), US Army Space and Missile Defense Command, Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), and other invited sponsors. The scientific objectives of the research are to improve the United States capability to detect, locate, and identify nuclear explosions. The purpose of the meeting is to provide the sponsoring agencies, as well as potential users, an opportunity to review research accomplished during the preceding year and to discuss areas of investigation for the coming year. For the researchers, it provides a forum for the exchange of scientific information toward achieving program goals, and an opportunity to discuss results and future plans. Paper topics include: seismic regionalization and calibration; detection and location of sources; wave propagation from source to receiver; the nature of seismic sources, including mining practices; hydroacoustic, infrasound, and radionuclide methods; on-site inspection; and data processing.

Download or read book Infrasound Monitoring for Atmospheric Studies written by Alexis Le Pichon and published by Springer. This book was released on 2018-10-26 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first volume “Infrasound monitoring for atmospheric studies” published in 2010, significant advances were achieved in the fields of engineering, propagation modelling, and atmospheric remote sensing methods. The global infrasound network, which consists of the International Monitoring Network (IMS) for nuclear test ban verification completed by an increasing number of regional cluster arrays deployed around the globe, has evidenced an unprecedented potential for detecting, locating and characterizing various natural and man-made sources. In recent years, infrasound has evolved into a broad interdisciplinary field encompassing academic disciplines of geophysics and innovative technical and scientific developments. The advances in innovative ground-based instruments, including infrasound inversions for continuous observations of the stratosphere and mesosphere, provide useful insights into the geophysical source phenomenology and atmospheric processes involved. Systematic investigations into low-frequency infrasound signals and the development of complementary observational platforms point out new insights into the dynamics of the middle atmosphere which play a significant role in both tropospheric weather and climate. This monitoring system also provides continuous relevant information about natural hazards with high societal benefits, like on-going volcanic eruptions, surface earthquakes, meteorites or severe weather. With this new edition, researchers and students benefit from a comprehensive content of both fundamental and applied inter-disciplinary topics.

Download or read book Detection of Nuclear Explosions Using Infrasound Techniques written by and published by . This book was released on 2007 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of typical IMS infrasound monitoring stations has been examined in detail in order to evaluate the detection capability of the global network for regional and distant nuclear explosions. Three significant problems have been identified: a) problems with the loss of higher frequency signal components in the primary monitoring passband, b) detection problems associated with a low degree of signal coherence between array elements and c) problems with high levels of wind-generated background noise. Loss of higher frequency signal components normally occurs when signal propagation is restricted to a thermospheric waveguide. This problem can often be resolved by ensuring that routine processing algorithms include a long-period passband. Coherence studies show that detection capability for regional and distant explosions may be limited by the small degree of signal correlation between array elements. This problem can be resolved by modifications to the array configuration. Wind-generated background noise is a potentially serious problem at most infrasound monitoring stations. We have developed a new wind-noise-reducing system that effectively eliminates wind-generated noise in the monitoring passband. This system is based on the use of a closed screened enclosure that mechanically degrades turbulent eddies in the atmospheric boundary layer. This system can be used as an effective, stand-alone wind-noise-reducing system that does not require the use of a pipe array.

Download or read book Infrasound and the Infrasonic Monitoring of Atmospheric Nuclear Explosions Supporting Environmental Data written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a data report which provides temperature, wind speed, sound speed, effective sound speed and mean global cloud cover data for use by those involved in monitoring compliance with a CTBT (Comprehensive Test Ban Treaty) and, in particular, for those concerned with infrasonic monitoring per se. The temperature, wind speed, sound speed and effective sound speed data are zonally averaged data obtained from the COSPAR (Committee on Space Research) International Reference Atmosphere: 1986 (0 km to 120 km). The data set is available from NASA's National Space Science Data Center, includes only the lower atmospheric altitude range extending from 0 km to 120 km and consists of tables of monthly mean values of temperature and zonally averaged wind speed for the latitude range 80 deg S to 80 deg N in 10 degree intervals. The mean global cloud cover data are presented as contours of cloud fraction and were obtained from three sources: (1) International Satellite Cloud Climatology Project (ISCCP); (2) the Atlas of Surface Marine Data 1994; and (3) the Global Distribution of the Total Amount of Cloudiness.

Download or read book Proceedings of the 30th Monitoring Research Review written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain papers prepared for the 30th Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, held 23-25 September, 2008 in Portsmouth, Virginia. These papers represent the combined research related to ground-based nuclear explosion monitoring funded by the National Nuclear Security Administration (NNSA), Air Force Technical Applications Center (AFTAC), Air Force Research Laboratory (AFRL), US Army Space and Missile Defense Command, Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), and other invited sponsors. The scientific objectives of the research are to improve the United States' capability to detect, locate, and identify nuclear explosions. The purpose of the meeting is to provide the sponsoring agencies, as well as potential users, an opportunity to review research accomplished during the preceding year and to discuss areas of investigation for the coming year. For the researchers, it provides a forum for the exchange of scientific information toward achieving program goals, and an opportunity to discuss results and future plans. Paper topics include: seismic regionalization and calibration; detection and location of sources; wave propagation from source to receiver; the nature of seismic sources, including mining practices; hydroacoustic, infrasound, and radionuclide methods; on-site inspection; and data processing.

Download or read book Proceedings of the 23rd Seismic Research Symposium written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain papers prepared for the 23rd Seismic Research Review: Worldwide Monitoring of Nuclear Explosions, held 2-5 October, 2001 in Jackson Hole, Wyoming. These papers represent the combined research related to ground-based nuclear explosion monitoring funded by the National Nuclear Security Administration (NNSA), Defense Threat Reduction Agency (DTRA), Air Force Technical Applications Center (AFTAC), the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), and other invited sponsors. The scientific objectives of the research are to improve the United States capability to detect, locate, and identify nuclear explosions. The purpose of the meeting is to provide the sponsoring agencies, as well as potential users, an opportunity to review research accomplished during the preceding year and to discuss areas of investigation for the coming year. For the researchers, it provides a forum for the exchange of scientific information toward achieving program goals, and an opportunity to discuss results and future plans. Paper topics include: seismic regionalization and calibration; detection and location of sources; wave propagation from source to receiver; the nature of seismic sources, including mining practices; hydroacoustic, infrasound, and radionuclide methods; on-site inspection; and data processing.