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Prediction Of Ionospheric Scintillations For Sattelite Signals In Communications And Navigations
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Book Synopsis Prediction of Ionospheric Scintillations for Sattelite Signals in Communications and Navigations by : H. J. Albrecht
Download or read book Prediction of Ionospheric Scintillations for Sattelite Signals in Communications and Navigations written by H. J. Albrecht and published by . This book was released on 1971 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Satellite Signal Scintillations - Observations and Research by : Richard K. Stevens
Download or read book A Review of Satellite Signal Scintillations - Observations and Research written by Richard K. Stevens and published by . This book was released on 1973 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Naturally occurring ionospheric irregularities can significantly affect the performance of communication and navigation satellite systems. Both amplitude and phase fluctuations (scintillations) are produced by ionospheric irregularities at heights from 200 to 600 km. Scintillations are most frequently observed on paths traversing the ionosphere at high latitudes and near the geomagnetic equator, although at times they are also observed at mid-latitudes as well. This report summarizes the current state-of-knowledge concerning ionospheric scintillations in the natural environment. Section 2 introduces scintillation effects and discusses the magnitude and the character of the problem. Section 3 introduces the fields of investigation in scintillation research. Section 4 discusses the global occurrence of ionospheric scintillation and its correlation with other measurable geophysical parameters. Section 5 discusses the various models which have been proposed to characterize signal propagation through the disturbed ionospheric environment. Section 6 reviews the theoretical work describing the physical processes leading to inhomogeneities in the ionosphere.
Book Synopsis A Survey of Scintillation Data and Its Relationship to Satellite Communications by : Jules Aarons
Download or read book A Survey of Scintillation Data and Its Relationship to Satellite Communications written by Jules Aarons and published by . This book was released on 1970 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: VHF atmospheric studies and communications and navigation systems; The definition of scintillation index and its use for characterizing ionospheric effects; Summary of properties of F-region irregularities; Application of the statistics of ionospheric scintillation to VHF and UHF systems; Special problems in scintillations; and Propagation delays of VHF waves.
Book Synopsis Tropospheric and Ionospheric Effects on Global Navigation Satellite Systems by : Timothy H. Kindervatter
Download or read book Tropospheric and Ionospheric Effects on Global Navigation Satellite Systems written by Timothy H. Kindervatter and published by John Wiley & Sons. This book was released on 2022-08-16 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tropospheric and Ionospheric Effects on Global Navigation Satellite Systems Explore atmospheric effects on radio frequency propagation in the context of Global Navigation Satellite System communication In Tropospheric and Ionospheric Effects on Global Navigation Satellite Systems, a team of distinguished researchers deliver an accessible and authoritative introduction to all scientifically relevant effects caused by the ionosphere and troposphere on GNSS RF signals. The book explores the origin of each type of propagation effect and explains it from a fundamental physical perspective. Each of the major methods used for the measurement, prediction, and mitigation of ionospheric and tropospheric effects on GNSS are discussed in detail. The authors also provide the mechanisms that drive ionization and plasma transport in the ionosphere, propagation phenomena (including scattering, absorption, and scintillations), and the predominant predictive models used to predict ionospheric propagation effects. With an emphasis on global navigation satellite systems, the book discusses the US Standard Atmosphere, a general reference model for characteristics of the unionized atmosphere. It also considers: Thorough introductions to the Global Positioning System and the principles of GNSS positioning Comprehensive explorations of tropospheric propagation and predictive models of the troposphere Practical discussions of the physics of the ionosphere, experimental observation of the ionosphere, and ionospheric propagation In-depth examinations of predictive models of the ionosphere, including group delay models for single-frequency GNSS receivers Ideal for engineers and research scientists with a professional or personal interest in geophysics, RF propagation, and GNSS and GPS applications, Tropospheric and Ionospheric Effects on Global Navigation Satellite Systems will also earn a place in the libraries of undergraduate and graduate students studying RF propagation or GNSS.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Synoptic Study of Scintillations of Ionospheric Origin in Satellite Signals by : Jules Aarons
Download or read book A Synoptic Study of Scintillations of Ionospheric Origin in Satellite Signals written by Jules Aarons and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021 by : Erma Yulihastin
Download or read book Proceedings of the International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021 written by Erma Yulihastin and published by Springer Nature. This book was released on 2022-09-29 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances in the area of Radioscience, Equatorial Atmospheric Science and Environment from the international symposium for equatorial atmosphere of the celebration of the Equatorial Atmosphere Radar (EAR) 20th Anniversary, conducted by Indonesian National Institute of Aeronautics and Space (LAPAN) and Kyoto University, in 2021. It provides a scientific platform for all participants to discuss ideas and current issues as well as to design solutions in the areas of atmospheric science, environmental science, space science, and related fields.
Book Synopsis The Effect of the Ionosphere on Communication, Navigation, and Surveillance Systems by : John M. Goodman
Download or read book The Effect of the Ionosphere on Communication, Navigation, and Surveillance Systems written by John M. Goodman and published by . This book was released on 1988 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ionosphere - New Perspectives by : Yann-Henri Chemin
Download or read book Ionosphere - New Perspectives written by Yann-Henri Chemin and published by BoD – Books on Demand. This book was released on 2023-06-21 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ionosphere is a layer of the Earth's atmosphere that extends from about 50 km to 1000 km above the Earth's surface. It is ionized by solar radiation, which creates ions and free electrons in the upper atmosphere. These ions and electrons reflect radio waves back to the Earth's surface, allowing long-distance radio communication as well as absorption of harmful solar radiation. Ionospheric conductivity monitoring assesses the state of the ionosphere and improves the accuracy of satellite communications. This book is organized into two sections on the influence and impact of transient or orbiting humanmade objects into the ionosphere and the monitoring and modeling of the temporal evolution of the ionosphere. The information presented will lead to a better understanding and forecasting of the ionosphere’s dynamic.
Book Synopsis Global Morphology of Ionospheric Scintillations by : Jules Aarons
Download or read book Global Morphology of Ionospheric Scintillations written by Jules Aarons and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amplitude fluctuations produced by small irregularities in electron density in the F-layer of the ionosphere (at 300 to 400 km height) can be a problem to communication and navigation systems in the VHF-UHF range. Recent measurements, primarily by AFCRL, are shown with emphasis on results at high and equatorial latitudes. At high latitudes an irregularity region exists whose lower boundary reaches 57 degrees invariant latitude near midnight. During magnetic storms the boundary descends to lower latitudes and the fading becomes deeper. Over the polar cap scintillations are somewhat diminished. When observing synchronous satellites through the irregularity region, deep and fast fading is frequently seen, with fade rates to one per second. Irregularities produce deep scintillations in the VHF range plus or minus 15 degrees from the geomagnetic equator. In equatorial regions maximum occurrence of high level scintillations takes place between 2100 and 2400 local time during the equinoxes; a minimum occurrence is observed during the solstices. When the sunspot number decreases, the equatorial irregularity region spreads and becomes larger. The data for various latitudes has been placed in statistical form, that is, distribution of amplitudes for 15-min samples as well as for periods of 1 yr and longer. (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
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 NASA Reference Publication written by and published by . This book was released on 1977 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Weather written by Jean Lilensten and published by Springer Science & Business Media. This book was released on 2007-05-16 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows the state-of-the-art in Europe on a very new discipline, Space Weather. This discipline lies at the edge between science and industry. This book reflects such a position with theoretic papers and applicative papers as well. Each chapter starts with a short introduction, which shows the coherence of a given domain. Then, four to five contributions written by the best specialists in Europe give detailed hints of a hot topic in space weather.
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 Satellite Signal Propagation, Impairments and Mitigation by : Rajat Acharya
Download or read book Satellite Signal Propagation, Impairments and Mitigation written by Rajat Acharya and published by Academic Press. This book was released on 2017-08-09 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite Signal Propagation, Impairments and Mitigation covers issues related to satellite link design. The book develops every concept from elementary physics, covering the basics of signal propagation from Maxwell’s equations and then gradually developing the physical reasons for impairments. It emphasizes the unique concepts for each involved process, based on their physics, and explains how they form the determining factors for the related suitable engineering technique for mitigation. Every basic principle is followed by mathematical substantiation with an explanation of the physics behind the equations. Covers the basics of signal propagation, starting from Maxwell’s equations and then gradually developing the physical reasons for the impairments Includes different important propagation experiments conducted and detailed in the Appendix Employs the power of MATLAB® as both a visualization and problem-solving tool Provides MATLAB scripts for simulation exercises
Book Synopsis Position, Navigation, and Timing Technologies in the 21st Century, Volumes 1 and 2 by : Y. Jade Morton
Download or read book Position, Navigation, and Timing Technologies in the 21st Century, Volumes 1 and 2 written by Y. Jade Morton and published by John Wiley & Sons. This book was released on 2020-12-17 with total page 2064 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
