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National Positioning, Navigation, and Timing Architecture Study

National Positioning, Navigation, and Timing Architecture Study
Author:
Publisher:
Total Pages: 209
Release: 2008
Genre:
ISBN:
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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.

National Positioning, Navigation, and Timing Architecture

National Positioning, Navigation, and Timing Architecture
Author:
Publisher:
Total Pages: 10
Release: 2008
Genre:
ISBN:
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An interagency team, sponsored by the Departments of Defense and Transportation and led by the National Security Space Office, has developed a National Positioning, Navigation, and Timing (PNT) Architecture that will substantially affect future government- and commercially-provided PNT products and services. The Architecture envisions sustained U.S. global leadership in PNT through a strategy that makes greater PNT capabilities more generally available. The strategy is supported by vectors, or enterprise architecture elements, for using multiple PNT-related phenomenologies and interchangeable PNT solutions, PNT and Communications synergy, and cooperative organizational structures.

National Positioning, Navigation, and Timing Architecture Study

National Positioning, Navigation, and Timing Architecture Study
Author:
Publisher:
Total Pages: 25
Release: 2010
Genre: Artificial satellites in navigation
ISBN:
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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.

National Positioning, Navigation and Timing (PNT) Architecture Workshop at Volpe, 26 April 2007

National Positioning, Navigation and Timing (PNT) Architecture Workshop at Volpe, 26 April 2007
Author:
Publisher:
Total Pages: 47
Release: 2007
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ISBN:
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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.

The Post GPS-only Era

The Post GPS-only Era
Author: Brandon J. Gray
Publisher:
Total Pages: 32
Release: 2017
Genre: Aids to air navigation
ISBN:
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"This research focuses on the need for the United States Government to expand the Positioning, Navigation, and Timing (PNT) portfolio beyond the use of the Global Positioning System (GPS) and Inertial Navigation Systems (INS) solutions. The central argument of this discussion is focused on the integration of a multiple Global Navigation Satellite System (GNSS) solution in all of our weapon systems to overcome the primary military challenge of the critical PNT challenges of critical timing, navigation, and positioning in a contested, degraded, and operational limited operating environment. The alternative navigation and timing portfolio expands beyond GNSS through adding robust timing architectures and operational depth through the incorporation of upgraded INS systems, critical network timing, and the use of both large and small atomic clock systems on the highest priority mission systems. This research also endeavors to make the connections between GPS and our 21st Century way of life and the other instruments of national power. GPS and the PNT mission set is the cornerstone of our information age technology. The diversification beyond GPS-only PNT solutions is necessary to ensure our national infrastructure, economy, and military dominance for the next century. It concludes with recommendations for how the Department of Defense and the entire United States Government (USG) should act now to implement changes for the United States PNT architecture to overcome the challenges of today and positioned to maintain PNT and NAVWAR dominance in the 21st Century."--Abstract.

All Source Positioning, Navigation and Timing

All Source Positioning, Navigation and Timing
Author: Rongsheng (Ken) Li
Publisher: Artech House
Total Pages: 440
Release: 2020-10-31
Genre: Technology & Engineering
ISBN: 163081704X
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This is the first book on the topic of all source positioning, navigation and timing (PNT) and how to solve the problem of PNT when the most widely-used measurement source available today, the GPS system, may be come unavailable, jammed or spoofed. Readers learn how to define the system architecture as well as the algorithms for GPS-denied and GPS-challenged PNT systems. In addition, the book provides comprehensive coverage of the individual technologies used, such as celestial navigation, vision-based navigation, terrain referenced navigation, gravity anomaly referenced navigation, signal of opportunity (SOO) based PNT, and collaborative PNT. Celestial Navigation is discussed, with stars and satellite used as reference, and star-tracker technology also included. Propagation based timing solutions are explored and the basic principles of oscillators and clocks presented. Initial alignment of strap-down navigation systems is explored, including initial alignment as a Kalman filter problem. Velocimeter/Dead reckoning based navigation and its impact on visual odometry is also explained. Covering both theoretical and practical issues, and packed with equations and models, this book is useful for both the engineering student as well as the advanced practitioner.

Global Navigation Satellite Systems

Global Navigation Satellite Systems
Author: National Academy of Engineering
Publisher: National Academies Press
Total Pages: 284
Release: 2012-04-27
Genre: Technology & Engineering
ISBN: 0309222753
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The Global Positioning System (GPS) has revolutionized the measurement of position, velocity, and time. It has rapidly evolved into a worldwide utility with more than a billion receiver sets currently in use that provide enormous benefits to humanity: improved safety of life, increased productivity, and wide-spread convenience. Global Navigation Satellite Systems summarizes the joint workshop on Global Navigation Satellite Systems held jointly by the U.S. National Academy of Engineering and the Chinese Academy of Engineering on May 24-25, 2011 at Hongqiao Guest Hotel in Shanghai, China. "We have one world, and only one set of global resources. It is important to work together on satellite navigation. Competing and cooperation is like Yin and Yang. They need to be balanced," stated Dr. Charles M. Vest, President of the National Academy of Engineering, in the workshop's opening remarks. Global Navigation Satellite Systems covers the objectives of the workshop, which explore issues of enhanced interoperability and interchangeability for all civil users aimed to consider collaborative efforts for countering the global threat of inadvertent or illegal interference to GNSS signals, promotes new applications for GNSS, emphasizing productivity, safety, and environmental protection. The workshop featured presentations chosen based on the following criteria: they must have relevant engineering/technical content or usefulness; be of mutual interest; offer the opportunity for enhancing GNSS availability, accuracy, integrity, and/or continuity; and offer the possibility of recommendations for further actions and discussions. Global Navigation Satellite Systems is an essential report for engineers, workshop attendees, policy makers, educators, and relevant government agencies.

Analyzing a More Resilient National Positioning, Navigation, and Timing Capability

Analyzing a More Resilient National Positioning, Navigation, and Timing Capability
Author: Richard Mason
Publisher:
Total Pages: 239
Release: 2021
Genre: Global Positioning System
ISBN:
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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.

Position, Navigation, and Timing Technologies in the 21st Century

Position, Navigation, and Timing Technologies in the 21st Century
Author: Y. Jade Morton
Publisher: John Wiley & Sons
Total Pages: 1170
Release: 2021-01-13
Genre: Science
ISBN: 1119458412
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Covers the latest developments in PNT technologies, including integrated satellite navigation, sensor systems, and civil applications Featuring sixty-four chapters that are divided into six parts, this two-volume work provides comprehensive coverage of the state-of-the-art in satellite-based position, navigation, and timing (PNT) technologies and civilian applications. It also examines alternative navigation technologies based on other signals-of-opportunity and sensors and offers a comprehensive treatment on integrated PNT systems for consumer and commercial applications. Volume 1 of Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications contains three parts and focuses on the satellite navigation systems, technologies, and engineering and scientific applications. It starts with a historical perspective of GPS development and other related PNT development. Current global and regional navigation satellite systems (GNSS and RNSS), their inter-operability, signal quality monitoring, satellite orbit and time synchronization, and ground- and satellite-based augmentation systems are examined. Recent progresses in satellite navigation receiver technologies and challenges for operations in multipath-rich urban environment, in handling spoofing and interference, and in ensuring PNT integrity are addressed. A section on satellite navigation for engineering and scientific applications finishes off the volume. Volume 2 of Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications consists of three parts and addresses PNT using alternative signals and sensors and integrated PNT technologies for consumer and commercial applications. It looks at PNT using various radio signals-of-opportunity, atomic clock, optical, laser, magnetic field, celestial, MEMS and inertial sensors, as well as the concept of navigation from Low-Earth Orbiting (LEO) satellites. GNSS-INS integration, neuroscience of navigation, and animal navigation are also covered. The volume finishes off with a collection of work on contemporary PNT applications such as survey and mobile mapping, precision agriculture, wearable systems, automated driving, train control, commercial unmanned aircraft systems, aviation, and navigation in the unique Arctic environment. In addition, this text: Serves as a complete reference and handbook for professionals and students interested in the broad range of PNT subjects Includes chapters that focus on the latest developments in GNSS and other navigation sensors, techniques, and applications Illustrates interconnecting relationships between various types of technologies in order to assure more protected, tough, and accurate PNT Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications will appeal to all industry professionals, researchers, and academics involved with the science, engineering, and applications of position, navigation, and timing technologies. pnt21book.com

Analyzing a More Resilient National Positioning, Navigation, and Timing Capability

Analyzing a More Resilient National Positioning, Navigation, and Timing Capability
Author: Richard Mason
Publisher:
Total Pages: 276
Release: 2021-06-15
Genre: Business & Economics
ISBN: 9781977403629
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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.