Author: Richard Mason Publisher: ISBN: 9781977403629 Category : Business & Economics Languages : en Pages : 276
Book Description
The authors assess the costs associated with realistic threats to domestic, nonmilitary uses of the Global Positioning System (GPS), and consider possible additions to the positioning, navigation, and timing ecosystem in light of those costs.
Author: Richard Mason Publisher: ISBN: Category : Global Positioning System Languages : en Pages : 239
Book Description
Because of the widespread use of the Global Positioning System (GPS) for positioning, navigation, and timing (PNT), concerns have been expressed that a disruption of GPS might require a national investment in backup capabilities. The authors assess the costs associated with realistic threats to domestic, nonmilitary uses of GPS, and review possible additions to the PNT ecosystem in light of those costs. When the ability of individuals and organizations to adapt to and use existing alternatives and workarounds is taken into account, our analysis suggests that the costs of GPS disruption, while real, would not be as high as is sometimes assumed. When actual GPS jamming events have occurred in the past, users have felt the effects but generally managed to cope without disastrous consequences. Also, we consider it unlikely that any event short of nuclear war would deny all satellite navigation to the entire United States for more than a few days. At the same time, any system that could entirely replace GPS would be comparatively much more expensive than the damages it would mitigate. Therefore, it is difficult to justify extensive investment in more GPS backups, although industry or government might well invest in PNT systems for their other merits, not just as a backup for GPS disruption per se. For example, the federal government is already investing in a system that will improve PNT for phone users in important urban areas, and this incidentally could also serve as a GPS backup.
Author: John W. Betz Publisher: ISBN: Category : Aids to navigation Languages : en Pages : 8
Book Description
This document summarizes the results of a MITRE initiative to define a national strategy for navigation and timing. The Global Positioning System (GPS) currently provides the foundation for our nation’s navigation and timing. GPS's many attributes ensure that it will remain the foundation for decades to come. Yet reliance on GPS is excessive, especially since GPS and its uses are currently fragile, and threats continue to emerge and grow. In response, various alternative sources of position, velocity, and time (PVT) are being advocated, often without adequate assessment or planning for how they can cost-effectively meet future needs and address future threats. A national strategy is needed to efficiently and effectively focus scarce resources, defining a consistent, long-term way ahead. This document describes such a strategy.
Author: Publisher: ISBN: Category : Languages : en Pages : 209
Book Description
This document summarizes the results of the National Positioning, Navigation, and Timing (PNT) Architecture Study conducted from May 2006 to August 2007. The National PNT Architecture encompasses ground-, air-, space-based and internal PNT data sources to efficiently provide effective PNT solutions to DoD and US Civil users around the world and in space. It also identifies the importance of supporting infrastructure necessary to implement and maintain future PNT services for US users world-wide. The architecture addresses capability gaps projected to exist in the 2025 timeframe, and articulates recommended initiatives to close those gaps (or mitigate their effects). Implementing the National PNT Architecture recommendations and transition to the Should-Be Architecture will maximize PNT services to DoD and US Civil users.
Author: United States. Congress. House. Committee on Armed Services. Strategic Forces Subcommittee Publisher: ISBN: Category : Astronautics and state Languages : en Pages : 132
Author: Publisher: ISBN: Category : Artificial satellites in navigation Languages : en Pages : 25
Book Description
The Assistant Secretary of Defense for Networks and Information Integration (ASD/NII) and the Under Secretary of Transportation for Policy (UST/P) sponsored a National Positioning, Navigation, and Timing (PNT) Architecture Study to "provide more effective and efficient PNT capabilities focused on the 2025 timeframe and an evolutionary path for government-provided systems and services." The co-sponsors approved that architecture and issued an Architecture Guidance Memorandum (AGM) on June 16, 2008. The implementation plan identifies the activities the PNT stakeholders' will need to undertake to implement the National PNT Architecture recommendations and provides essential supplementary guidance.
Author: Publisher: ISBN: Category : Languages : en Pages : 47
Book Description
This briefing gives an overview of the format of the National PNT Architecture Workshop at Volpe National Transportation Systems Center in Cambridge, MA, on 26 Apr 2007, looking at the architecture development process, its current status and where it is headed. The PNT is a system of systems designed to guide government-provided positioning, navigation and timing systems.
Author: John W. Betz Publisher: John Wiley & Sons ISBN: 1118615972 Category : Technology & Engineering Languages : en Pages : 672
Book Description
This book describes the design and performance analysis of satnav systems, signals, and receivers, with a general approach that applies to all satnav systems and signals in use or under development. It also provides succinct descriptions and comparisons of each satnav system. Clearly structured, and comprehensive depiction of engineering satellite-based navigation and timing systems, signals, and receivers GPS as well as all new and modernized systems (SBAS, GLONASS, Galileo, BeiDou, QZSS, IRNSS) and signals being developed and fielded Theoretical and applied review questions, which can be used for homework or to obtain deeper insights into the material Extensive equations describing techniques and their performance, illustrated by MATLAB plots New results, novel insights, and innovative descriptions for key approaches and results in systems engineering and receiver design If you are an instructor and adopted this book for your course, please email [email protected] to get access to the instructor files for this book.
Author: Lisa S. Meredith Publisher: Rand Corporation ISBN: 0833058169 Category : Medical Languages : en Pages : 185
Book Description
As U.S. service members deploy for extended periods on a repeated basis, their ability to cope with the stress of deployment may be challenged. Many programs are available to encourage and support psychological resilience among service members and families. However, little is known about these programs' effectiveness. This report reviews resilience literature and programs to identify evidence-informed factors for promoting resilience.
Author: Overlook Systems Technologies, Inc Publisher: ISBN: Category : Global Positioning System Languages : en Pages : 0
Book Description
The Final Report of the President's Commission on Critical Infrastructure Protection concluded that Global Positioning System (GPS) services and applications are susceptible to various types of interference, and that the effects of these vulnerabilities on civilian transportation applications should be studied in detail. As a result of the report, Presidential Decision Directive (PDD) 63 directed that the Department of Transportation (DOT), in consultation with the Department of Defense (DoD), undertake a thorough evaluation of the vulnerability of the national transportation infrastructure that relies on the Global Positioning System. The Volpe National Transportation Systems Center (RSPA/Volpe Center) conducted a vulnerability analysis of GPS and identified the potential impact to aviation, maritime transportation, railroads, and Intelligent Transportation Systems (ITS). The final report, Vulnerability Assessment of the Transportation Infrastructure Relying on the Global Positioning System was published on August 29, 2001 (Ref.1). This study contained a series of recommendations, which were reviewed and ultimately accepted by the Department's operating agencies. Recommendation sets were made relative to: overarching issues related to GPS vulnerabilities, mitigating the vulnerabilities of the GPS signal to disruption or loss, and mitigating the vulnerabilities of the transportation systems resulting from the disruption or loss of the GPS signal. Addressing this set of Volpe recommendations started with the key question, "What type of backup systems must be in place to mitigate the disruption or loss of GPS?" The answer led to the establishment of a Capabilities Assessment Task Force to develop a recommended capabilities investment strategy for US radionavigation systems to meet transportation infrastructure requirements for the next ten years. This recommendation had to balance the plan to move toward a heavy reliance on satellite navigation with the vulnerabilities of such an approach highlighted in the Volpe Study. According to the study, "Backups for positioning and precision timing are necessary for all GPS applications involving the potential for life-threatening situations or major economic or environmental impact ... The appropriate mix for a given application will result from careful analysis of benefits, costs, and risk acceptance."
Author: Richard Mason
Author: Richard Mason
Author: John W. Betz
Author: 
Author: United States. Congress. House. Committee on Armed Services. Strategic Forces Subcommittee
Author: 
Author: 
Author: John W. Betz
Author: Lisa S. Meredith
Author: Overlook Systems Technologies, Inc