Global Scintillation Model

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Global Scintillation Model

Author : Joseph Horace Pope
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Global Scintillation Model by : Joseph Horace Pope

Download or read book Global Scintillation Model written by Joseph Horace Pope and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A global model for obtaining scintillations was developed at Stanford Research Institute by Fremouw. This model uses a number of input parameters including sunspot number, day of the year, time of day, location of the receiver and transmitter, the frequency to provide an average value of scintillation activity under the specified conditions. The model was later modified by Pope at NOAA/ERL to better represent certain measurements of scintillation activity in the high latitude regions and to include a variation in the magnetic activity index. The model uses the Briggs and Parkin theory appropriate for weak scatter. Certain convenient mathematical forms are assumed for the different regions of the earth. These include the equatorial, mid-latitude, auroral zone, and high latitude boundary regions. The coefficients in these mathematical functions were determined empirically by means of appropriate scintillation activity data that were taken in many different regions of the globe and over different portions of the sunspot cycle. The model is valid only for that frequency domain (VHF, UHF) upon which the observational data were based. The model is described in this report with its uses and limitations. Details of a computer program based on the model that gives scintillation activity as a function of the various input parameters are also provided.

Global Morphology of Ionospheric Scintillations II

Author : Jules Aarons
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Global Morphology of Ionospheric Scintillations II by : Jules Aarons

Download or read book Global Morphology of Ionospheric Scintillations II written by Jules Aarons and published by . This book was released on 1975 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updating a review of the global morphology of ionospheric scintillations published in 1971, this study adds additional experimental studies on familiar topics to newer types of measurements of ionospheric irregularities, including in situ experiments and artificial heating of the F-layer.

Global Morphology of Ionospheric Scintillations

Author : Jules Aarons
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)

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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).

Global Scintillation Model

Author : Joseph Horace Pope
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (132 download)

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Book Synopsis Global Scintillation Model by : Joseph Horace Pope

Download or read book Global Scintillation Model written by Joseph Horace Pope and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Theory of Scintillation with Applications in Remote Sensing

Author : Charles Rino
Publisher : John Wiley & Sons
ISBN 13 : 1118011740
Total Pages : 221 pages
Book Rating : 4.1/5 (18 download)

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Book Synopsis The Theory of Scintillation with Applications in Remote Sensing by : Charles Rino

Download or read book The Theory of Scintillation with Applications in Remote Sensing written by Charles Rino and published by John Wiley & Sons. This book was released on 2011-03-08 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to truly understand data signals transmitted by satellite, one must understand scintillation theory in addition to well established theories of EM wave propagation and scattering. Scintillation is a nuisance in satellite EM communications, but it has stimulated numerous theoretical developments with science applications. This book not only presents a thorough theoretical explanation of scintillation, but it also offers a complete library of MATLAB codes that will reproduce the book examples. The library includes GPS coordinate manipulations, satellite orbit prediction, and earth mean magnetic field computations. The subect matter is for EM researchers; however, also theory is relevant to geophysics, acoustics, optics and astoronomy.

Ionospheric Scintillation Modeling Needs and Tricks

Author : Shishir Priyadarshi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

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Book Synopsis Ionospheric Scintillation Modeling Needs and Tricks by : Shishir Priyadarshi

Download or read book Ionospheric Scintillation Modeling Needs and Tricks written by Shishir Priyadarshi and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wavelength of the radio-wave satellite signal is of the order of the minimal small-scale ionospheric irregularities (i.e., a few centimeters). As the satellite signal passes through the ionosphere, its interaction with the ionospheric irregularity structures causes refraction, reflection, and polarization in the satellite signal. Ionospheric irregularities degrade the trans-ionospheric radio-wave signal quality, between the satellite and the receivers, due to scintillation. The physics-based model often fails to produce global morphology during the extreme solar events, whereas empirical models based on the ionospheric scintillation data demonstrate better quality to forecast the scintillation effects during extreme solar event. It is really tricky to make a scintillation model that is sensitive to low and high solar activities as well as extreme solar events simultaneously. In the presented book chapter, we will discuss/review the needs and tricks of modeling ionospheric scintillation during extreme solar events as well as all weather and latitudinal cases. There are several aspects that influence the scintillation occurrence, its strength, and global distribution. The latitudinal dependence, local weather, solar/geomagnetic activity conditions, and local times are the widely accepted factors that control and influence ionospheric scintillation most. This book chapter discusses all these aspects and also suggests the ways to cast aside those factors that led to the wrong measure of scintillation indices.

Space Physics and Aeronomy, Ionosphere Dynamics and Applications

Author : Chao Huang
Publisher : John Wiley & Sons
ISBN 13 : 1119507553
Total Pages : 47 pages
Book Rating : 4.1/5 (195 download)

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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

The Propagation of Radio Waves

Author : K. G. Budden
Publisher : Cambridge University Press
ISBN 13 : 9780521369527
Total Pages : 694 pages
Book Rating : 4.3/5 (695 download)

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Book Synopsis The Propagation of Radio Waves by : K. G. Budden

Download or read book The Propagation of Radio Waves written by K. G. Budden and published by Cambridge University Press. This book was released on 1988-08-04 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concerned with the ionosphere and the magnetosphere, and the theory of their effect on radio waves. It includes accounts of some mathematical topics now widely used in this study, particularly W. K. B. approximations, Airy integral functions and integration by steepest descents. The subject is divided into ray theory and full wave theory. Ray theory is useful for high frequencies when the ionosphere is treated as a horizonally stratified medium. The discussion of the magnetosphere, whose structure is more complicated, includes an account of whistlers and ion cyclotron whistlers. The book has been planned both for final year undergraduates and as a reference book for research. It is suitable as a course book on radio propagation for students of physics or electrical engineering or mathematics. Some of the topics are presented from an elementary viewpoint so as to help undergraduates new to the subject. The later parts are more advanced. Because the subject is so large and has seen many important recent advances, some topics have had to be treated briefly, but there is a full bibliography with about 600 references.

Modeling Ionospheric Scintillation and Its Effects on GPS Carrier Tracking Loops and Two Other Applications of Modeling and Estimation

Download Modeling Ionospheric Scintillation and Its Effects on GPS Carrier Tracking Loops and Two Other Applications of Modeling and Estimation PDF Online Free

Author : Todd Edwin Humphreys
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.E/5 ( download)

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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).

Ionospheric Scintillation Effects on Global Positioning System Receivers

Author : Mark Frederick Knight
Publisher :
ISBN 13 :
Total Pages : 304 pages
Book Rating : 4.:/5 (223 download)

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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.

Satellites Missions and Technologies for Geosciences

Author : Vladislav Demyanov
Publisher :
ISBN 13 : 9781789853018
Total Pages : pages
Book Rating : 4.8/5 (53 download)

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Book Synopsis Satellites Missions and Technologies for Geosciences by : Vladislav Demyanov

Download or read book Satellites Missions and Technologies for Geosciences written by Vladislav Demyanov and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Being a vital modern technology, satellite systems for navigation, telecommunication, and geosciences have developed rapidly in the last 25 years. Modern satellite technologies have become a base of our civilization and support our day-to-day activity in both practice and geosciences. This book is devoted to GNSS-remote sensing for ionosphere research, modeling and mitigation techniques to diminish the ionosphere and multipath impacts on GNSS, and survey of the modern satellite missions and technologies. We hope that the experts' opinions presented in the book will be interesting for the research community and students in the area of satellites and space missions as well as in engineering and geoscience research" -- IntechOpen.

Global Morphology of Ionospheric Scintillations II.

Author : Jules Aarons
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (682 download)

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Book Synopsis Global Morphology of Ionospheric Scintillations II. by : Jules Aarons

Download or read book Global Morphology of Ionospheric Scintillations II. written by Jules Aarons and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ionospheric Tomography

Author : Viacheslav E. Kunitsyn
Publisher : Springer Science & Business Media
ISBN 13 : 9783540004042
Total Pages : 282 pages
Book Rating : 4.0/5 (4 download)

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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.

The Theory and Practice of Scintillation Counting

Author : J. B. Birks
Publisher : Elsevier
ISBN 13 : 1483156060
Total Pages : 685 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis The Theory and Practice of Scintillation Counting by : J. B. Birks

Download or read book The Theory and Practice of Scintillation Counting written by J. B. Birks and published by Elsevier. This book was released on 2013-10-22 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Theory and Practice of Scintillation Counting is a comprehensive account of the theory and practice of scintillation counting. This text covers the study of the scintillation process, which is concerned with the interactions of radiation and matter; the design of the scintillation counter; and the wide range of applications of scintillation counters in pure and applied science. The book is easy to read despite the complex nature of the subject it attempts to discuss. It is organized such that the first five chapters illustrate the fundamental concepts of scintillation counting. Chapters 6 to 10 detail the properties and applications of organic scintillators, while the next four chapters discuss inorganic scintillators. The last two chapters provide a review of some outstanding problems and a postscript. Nuclear physicists, radiation technologists, and postgraduate students of nuclear physics will find the book a good reference material.

GNSS Receivers for Weak Signals

Author : Nesreen I. Ziedan
Publisher : Artech House Publishers
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.3/5 (91 download)

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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.

Laser Beam Scintillation with Applications

Author : Larry C. Andrews
Publisher : SPIE Press
ISBN 13 : 9780819441034
Total Pages : 408 pages
Book Rating : 4.4/5 (41 download)

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Book Synopsis Laser Beam Scintillation with Applications by : Larry C. Andrews

Download or read book Laser Beam Scintillation with Applications written by Larry C. Andrews and published by SPIE Press. This book was released on 2001 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewed interest in laser communication systems has sparked development of useful new analytic models. This book discusses optical scintillation and its impact on system performance in free-space optical communication and laser radar applications, with a detailed look at propagation phenomena and the role of scintillation on system behavior. Intended for practicing engineers, scientists, and students.

Introduction to RF Propagation

Author : John S. Seybold
Publisher : John Wiley & Sons
ISBN 13 : 0471743682
Total Pages : 348 pages
Book Rating : 4.4/5 (717 download)

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Book Synopsis Introduction to RF Propagation by : John S. Seybold

Download or read book Introduction to RF Propagation written by John S. Seybold and published by John Wiley & Sons. This book was released on 2005-10-03 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to RF propagation that spans all wireless applications This book provides readers with a solid understanding of the concepts involved in the propagation of electromagnetic waves and of the commonly used modeling techniques. While many books cover RF propagation, most are geared to cellular telephone systems and, therefore, are limited in scope. This title is comprehensive-it treats the growing number of wireless applications that range well beyond the mobile telecommunications industry, including radar and satellite communications. The author's straightforward, clear style makes it easy for readers to gain the necessary background in electromagnetics, communication theory, and probability, so they can advance to propagation models for near-earth, indoor, and earth-space propagation. Critical topics that readers would otherwise have to search a number of resources to find are included: * RF safety chapter provides a concise presentation of FCC recommendations, including application examples, and prepares readers to work with real-world propagating systems * Antenna chapter provides an introduction to a wide variety of antennas and techniques for antenna analysis, including a detailed treatment of antenna polarization and axial ratio; the chapter contains a set of curves that permit readers to estimate polarization loss due to axial ratio mismatch between transmitting and receiving antennas without performing detailed calculations * Atmospheric effects chapter provides curves of typical atmospheric loss, so that expected loss can be determined easily * Rain attenuation chapter features a summary of how to apply the ITU and Crane rain models * Satellite communication chapter provides the details of earth-space propagation analysis including rain attenuation, atmospheric absorption, path length determination and noise temperature determination Examples of widely used models provide all the details and information needed to allow readers to apply the models with confidence. References, provided throughout the book, enable readers to explore particular topics in greater depth. Additionally, an accompanying Wiley ftp site provides supporting MathCad files for select figures in the book. With its emphasis on fundamentals, detailed examples, and comprehensive coverage of models and applications, this is an excellent text for upper-level undergraduate or graduate students, or for the practicing engineer who needs to develop an understanding of propagation phenomena.