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Ionospheric Scintillation Effects On Global Positioning System Receivers
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Book Synopsis Ionospheric Scintillation Effects on Global Positioning System Receivers by : Mark Frederick Knight
Download or read book Ionospheric Scintillation Effects on Global Positioning System Receivers written by Mark Frederick Knight and published by . This book was released on 2000 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uses a widely accepted stochastic model of scintillation activity to investigate the effects of scintillations on GPS receivers and systems.
Book Synopsis Space Physics and Aeronomy, Ionosphere Dynamics and Applications by : Chao Huang
Download or read book Space Physics and Aeronomy, Ionosphere Dynamics and Applications written by Chao Huang and published by John Wiley & Sons. This book was released on 2021-05-11 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of global ionospheric research from the polar caps to equatorial regions It's more than a century since scientists first identified the ionosphere, the layer of the Earth’s upper atmosphere that is ionized by solar and cosmic radiation. Our understanding of this dynamic part of the near-Earth space environment has greatly advanced in recent years thanks to new observational technologies, improved numerical models, and powerful computing capabilities. Ionosphere Dynamics and Applications provides a comprehensive overview of historic developments, recent advances, and future directions in ionospheric research. Volume highlights include: Behavior of the ionosphere in different regions from the poles to the equator Distinct characteristics of the high-, mid-, and low-latitude ionosphere Observational results from ground- and space-based instruments Ionospheric impacts on radio signals and satellite operations How earthquakes and tsunamis on Earth cause disturbances in the ionosphere The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about the Space Physics and Aeronomy collection in this Q&A with the Editors in Chief
Book Synopsis Modeling Ionospheric Scintillation and Its Effects on GPS Carrier Tracking Loops and Two Other Applications of Modeling and Estimation by : Todd Edwin Humphreys
Download or read book Modeling Ionospheric Scintillation and Its Effects on GPS Carrier Tracking Loops and Two Other Applications of Modeling and Estimation written by Todd Edwin Humphreys and published by . This book was released on 2008 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four papers are presented that introduce several applications of modeling and estimation with emphasis on the Global Positioning System (GPS). The main thrust of this work, contained in the first two papers, concerns modeling ionosphere-induced scintillation in GPS radio waves and modeling the effect of scintillation on GPS receiver carrier tracking loops. The third paper introduces a novel magnetometer-based attitude and rate estimation strategy for application to spacecraft with wire booms. The fourth paper investigates certain anomalous peaks in the power spectra of GPS-derived zenith neutral delay measurements and concludes that these peaks are caused by atmospheric pressure tides. (Abstract).
Book Synopsis An Advanced System for Measurement of Transionospheric Radio Propagation Effects Using GPS Signals by : G. J. Bishop
Download or read book An Advanced System for Measurement of Transionospheric Radio Propagation Effects Using GPS Signals written by G. J. Bishop and published by . This book was released on 1987 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced system for measurement of transionospheric radio propagation effects was developed, utilizing the TI-4100 four-channel Global Positioning System (GPS) receiver. During AFGL's Polar ARCS campaign at Sondrestrom, Greenland in February-March 1987, the system successfully measured ionospheric total electron content (TEC), phase scintillation, and amplitude scintillation on both GPS carrier frequencies, from up to four satellites simultaneously. This was the first time it has been possible to measure these parameters simultaneously, in multiple directions, in the high-latitude regions. Coupled with the simultaneous optical and incoherent scatter radar diagnostics obtained during the Polar ARCS campaign, these measurements significantly improve our capability to characterize high latitude ionospheric structures, particularly their temporal and spatial variation. Additionally, the development of this advanced system has contributed significantly to the technology base for specification of the Transionospheric Sensing System (TISS) for the Air Weather Service. The system can also be software upgraded to perform special navigation in addition to ionospheric measurements in airborne applications.
Book Synopsis Overcoming Ionospheric Scintillation for Worldwide GPS Aviation by : Jiwon Seo
Download or read book Overcoming Ionospheric Scintillation for Worldwide GPS Aviation written by Jiwon Seo and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Together, the Global Positioning System (GPS) and the Wide Area Augmentation System (WAAS) can guide aircraft down to 200 ft above the runway. This approach procedure is referred to as Localizer Performance with Vertical guidance (LPV)-200. Approach guidance using GPS and WAAS has many advantages over traditional precision approach guidance using the Instrument Landing System (ILS) and the number of published LPV approaches in the U.S. is now greater than the number of published Category I ILS approaches. Given the success of LPV service in the U.S., worldwide expansion of the LPV service is being actively pursued. One of the main challenges for the LPV service in the equatorial area, including Brazil and India, is ionospheric scintillation. Due to electron density irregularities inside the ionosphere, transionospheric radio waves interfere constructively and destructively; consequently, a GPS receiver can experience deep and frequent signal fading. This phenomenon is known as ionospheric scintillation. Although the physics of the ionospheric scintillation has been studied for several decades, its impact on GPS aviation has not been well understood. As a result, the current GPS aviation receiver performance standards (RTCA/DO-229D) do not have any specific performance requirements to mitigate the impact of scintillation. Although current aviation receivers do not protect against scintillation, currently it is not a problem because they are only used in the mid-latitude area where scintillation is not usually observed. The advent of a new GPS civilian signal at the L5 frequency and dual frequency airborne receivers will eliminate ionospheric delay errors in the equatorial and arctic regions, but it will not solve the scintillation problems that will arise in those areas. This dissertation analyzes and proposes a solution to scintillation for the dual frequency era so that the LPV service will become practical worldwide. Specifically, this research investigates the characteristics of GPS signal fades due to scintillation from the perspective of GPS aviation. Using high rate GPS data collected during the past solar maximum, scintillation impact on the operational availability of LPV-200 is analyzed. In order to mitigate scintillation impact, satellite-to-satellite correlation and frequency-to-frequency correlation of GPS signal fades under strong scintillation are investigated. Based on the observed data and availability analyses, a new requirement for the future dual frequency aviation receiver performance standards to mitigate the impact of scintillation is proposed. This new requirement mandating fast reacquisition after a very brief outage is under discussion at the standards committee working group (RTCA Special Committee-159, Working Group-2). Without this requirement, a certified aviation receiver may provide less than 50% availability of LPV-200 during severe scintillation. It is demonstrated that with this new requirement in place, it will be possible to achieve high level of availability (more than 99% availability) even during severe scintillation.
Book Synopsis Ionospheric Effects on Global Positioning System Receivers by :
Download or read book Ionospheric Effects on Global Positioning System Receivers written by and published by . This book was released on 1998 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study conducted under tasks ADL 94/373 and ADA 96/005 into the effects of the ionosphere on Global Positioning System (CPS) receivers. The report focuses on the effects of the disturbed ionosphere on GPS as this phenomenon has the capacity to degrade the accuracy and reliability of both civilian and military GPS receivers. The impact of ionospheric disturbances on the susceptibility of GPS in a potentially hostile electromagnetic environment is also discussed.
Book Synopsis Position, Navigation, and Timing Technologies in the 21st Century by : Y. Jade Morton
Download or read book Position, Navigation, and Timing Technologies in the 21st Century written by Y. Jade Morton and published by John Wiley & Sons. This book was released on 2021-01-13 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Ionospheric Radio by : Kenneth Davies
Download or read book Ionospheric Radio written by Kenneth Davies and published by IET. This book was released on 1990 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory text replaces two earlier publications (Davies 1965, 1969). Among the topics: characteristics of waves and plasma, the solar-terrestrial system, the Appleton formula, radio soundings of the ionosphere, morphology of the ionosphere, oblique propagation, importance of amplitude and phase, earth-space propagation. Annotation copyrighted by Book News, Inc., Portland, OR
Book Synopsis A Global Positioning System Receiver for Monitoring Ionospheric Total Electron Content by : Kyriaky Eftaxiadis
Download or read book A Global Positioning System Receiver for Monitoring Ionospheric Total Electron Content written by Kyriaky Eftaxiadis and published by . This book was released on 1999 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A system based on a NovAtel Millennium L1/L2 dual frequency Global Positioning System (GPS) satellite receiver has been developed to monitor ionospheric Total Electron Content (TEC) and to detect ionospheric scintillation. Software has been written to control the logging of data from the receiver to an Iomega Jaz 1 Gbyte removable disk unit. Real time displays on the Notebook screen permit the inspection of both slant and vertical TEC values taken over the preceding 24 hours, together with the locations of satellites currently in view. The system is suitable both for long term unattended routine data gathering and for more intensive short term campaigns. Two receiver system units have been deployed in Indonesia and Malaysia for the purpose of monitoring the effects of the equatorial ionosphere on GPS navigation performance as the current solar cycle approaches its 11 year maximum activity.
Book Synopsis GPS for Geodesy by : Peter J.G. Teunissen
Download or read book GPS for Geodesy written by Peter J.G. Teunissen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth description of the theory and mathematical models behind the application of the global positioning system in geodesy and geodynamics. The contributions by leading experts in the field ensure a continuous flow of ideas and developments. The mathematical models for GPS measurements are developed in the first half of the book, and these are followed by GPS solutions for geodetic applications on local, regional and global scales.
Book Synopsis Encyclopedia of GIS by : Shashi Shekhar
Download or read book Encyclopedia of GIS written by Shashi Shekhar and published by Springer Science & Business Media. This book was released on 2007-12-12 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of GIS provides a comprehensive and authoritative guide, contributed by experts and peer-reviewed for accuracy, and alphabetically arranged for convenient access. The entries explain key software and processes used by geographers and computational scientists. Major overviews are provided for nearly 200 topics: Geoinformatics, Spatial Cognition, and Location-Based Services and more. Shorter entries define specific terms and concepts. The reference will be published as a print volume with abundant black and white art, and simultaneously as an XML online reference with hyperlinked citations, cross-references, four-color art, links to web-based maps, and other interactive features.
Author :Viacheslav E. Kunitsyn Publisher :Springer Science & Business Media ISBN 13 :9783540004042 Total Pages :282 pages Book Rating :4.0/5 (4 download)
Book Synopsis Ionospheric Tomography by : Viacheslav E. Kunitsyn
Download or read book Ionospheric Tomography written by Viacheslav E. Kunitsyn and published by Springer Science & Business Media. This book was released on 2003-05-13 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authored by leading international researchers, this monograph introduces and reviews developed tomograhic methods for discovering 2D and 3D structures of the ionosphere, and discusses the experimental implementation of these methods. The detailed derivations and explanations make this book an excellent starting point for non-specialists.
Book Synopsis Global Positioning System by : Bradford W. Parkinson
Download or read book Global Positioning System written by Bradford W. Parkinson and published by AIAA. This book was released on 1996 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Bernhard Hofmann-Wellenhof Publisher :Springer Science & Business Media ISBN 13 :3211730176 Total Pages :537 pages Book Rating :4.2/5 (117 download)
Book Synopsis GNSS – Global Navigation Satellite Systems by : Bernhard Hofmann-Wellenhof
Download or read book GNSS – Global Navigation Satellite Systems written by Bernhard Hofmann-Wellenhof and published by Springer Science & Business Media. This book was released on 2007-11-20 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book extends the scientific bestseller "GPS - Theory and Practice" to cover Global Navigation Satellite Systems (GNSS) and includes the Russian GLONASS, the European system Galileo, and additional systems. The book refers to GNSS in the generic sense to describe the various existing reference systems for coordinates and time, the satellite orbits, the satellite signals, observables, mathematical models for positioning, data processing, and data transformation. This book is a university-level introductory textbook and is intended to serve as a reference for students as well as for professionals and scientists in the fields of geodesy, surveying engineering, navigation, and related disciplines.
Book Synopsis GNSS Receivers for Weak Signals by : Nesreen I. Ziedan
Download or read book GNSS Receivers for Weak Signals written by Nesreen I. Ziedan and published by Artech House Publishers. This book was released on 2006 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many important GPS applications require a GNSS (global navigation satellite system) receiver with the ability to work with weak signals. This book addresses the critical issue, introducing new, efficient GNSS receiver algorithms designed for weak signals and various dynamic conditions.
Book Synopsis Model of Equatorial Scintillations from in Situ Measurements by : Sunanda Basu
Download or read book Model of Equatorial Scintillations from in Situ Measurements written by Sunanda Basu and published by . This book was released on 1976 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In situ measurements of F-region irregularity amplitude and ambient electron density made by the retarding potential analyzer (RPA) on OGO-6 near perigee altitude of 400 km have been utilized to derive the variation of electron density deviation over the equatorial region. Based on these measured electron density deviations and other assumed model parameters, including a three-dimensional power-law form of irregularity spectrum of index 4, a model of equatorial scintillations is developed in the framework of diffraction theory. The percentage occurrence contours of estimated equatorial scintillations greater than or equal to 4.5 dB at 140 MHz during 1900 to 2300 LMT for the period November to December 1969 and 1970 have been derived. The model is found to depict a pronounced longitude variation with the scintillation belt width and percentage occurrence being maximum over the African sector. The latitude extent of the spatial scintillation belt narrows over the American sector without much decrease in the scintillation occurrence whereas over the Indian and Far Eastern sectors both the extent and the occurrence are found to decrease. The percentage occurrence of scintillations estimated from this model is found to be consistent with VHF scintillation measurements at Ghana, Huancayo, and Calcutta. In addition, the model was found to be in qualitative agreement with GHz observations at various longitudes made by the COMSAT group. The effect of varying model parameters on scintillation estimates at VHF, UHF and GHz are discussed. Implications of the observed longitudinal variation of scintillations on current theories of equatorial irregularity formation are indicated. (Author).
Download or read book Beyond Land written by Shivani and published by Tredition Gmbh. This book was released on 2024-05-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Imagine navigating the vast expanse of the South Atlantic Ocean, where traditional methods like land-based stations can't reach. Here's where a groundbreaking approach emerges: using a mobile GNSS (Global Navigation Satellite System) receiver to explore "ionospheric scintillation" in this remote region. Ionospheric scintillation is a rapid fluctuation in radio signals caused by variations in electron density within the upper atmosphere. The South Atlantic Anomaly (SAA), a region with a weakened magnetic field, intensifies this phenomenon. For navigation systems like GPS, scintillation can lead to errors or even signal loss. Traditionally, studying scintillation relied on land-based receivers, leaving vast ocean areas unexplored. This mobile GNSS receiver mounted on a research vessel ventures into the heart of the SAA, collecting real-time data on scintillation intensity and its effects on GNSS signals. This groundbreaking approach offers several advantages. It allows scientists to map the spatial extent of scintillation within the SAA, creating a more comprehensive picture of this phenomenon. By studying how scintillation intensity varies across the region, scientists can refine prediction models for safer navigation. Furthermore, a mobile receiver can capture the dynamic nature of scintillation. Unlike land-based stations with fixed locations, the mobile receiver offers a continuous stream of data, revealing how scintillation intensity changes over time. This data is crucial for understanding how scintillation events evolve and their potential impact on GNSS users. The information gleaned from such expeditions paves the way for improved navigation in the South Atlantic. By understanding scintillation patterns, mitigation strategies like using multiple frequencies or real-time signal correction techniques can be developed. Ultimately, venturing "beyond land" with a mobile GNSS receiver is a critical step towards ensuring safe and reliable navigation in this challeng
