Ionosphere

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The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. (Wikipedia.org)






Conferences related to Ionosphere

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2015 IEEE International Radar Conference (RADAR 2015)

The scope of the IEEE 2015 International Radar Conference includes all aspects of civil and military radar. Topics range from fundamental theory to cutting-edge applications, from signal processing, modeling, simulation to hardware implementation and experimental results.

  • 2014 IEEE Radar Conference (RadarCon)

    The 2014 IEEE Radar Conference will showcase innovations and developments in radar technology. Topics will include presentations describing developments in radar systems and their implementations, phenomenology, target and clutter modeling, signal processing, component advances, etc.

  • 2013 IEEE Radar Conference (RadarCon)

    The conference theme is The Arctic The New Frontier as it presents a vast and challenging environment for which radar systems operating in a multi-sensor environment are currently being developed for deployment on space, air, ship and ground platforms and for both remote sensing of the environment and for the monitoring of human activity. It is one of the major challenges and applications being pursued in the field of radar development in Canada.

  • 2012 IEEE Radar Conference (RadarCon)

    The 2012 IEEE Radar Conference will host 400 to 600 attendees interested in innovations and developments in radar technology. The radar related topics will include presentations describing developments in radar systems and their implementations, phenomenology, target and clutter modeling, component advances, signal processing and data processing utilizing advanced algorithms. The conference will also include exhibits by vendors of radar systems, radar components, instrumentation, related software and publ

  • 2011 IEEE Radar Conference (RadarCon)

    RadarCon11 will feature topics in radar systems, technology, applications, phenomenology,modeling, & signal processing. The conference theme, In the Eye of the Storm, highlights the strong regional interest in radar for severe weather analysis and tracking. Broader implications of the theme reflect global interests such as radar's role in assessing climate change, supporting myriad defense applications, as well as issues with spectrum allocation and management.

  • 2010 IEEE International Radar Conference

    RADAR Systems, RADAR technology


2012 10th International Symposium on Antennas, Propagation & EM Theory (ISAPE - 2012)

ISAPE, a serial symposium on AP and EM Theory, always offers an active forum for exchanging creative ideas and experiences of the latest developments, designs in the areas of antennas, propagation, and electromagnetic theory for professors, researchers, engineers and excellent students all over the world. ISAPE 2012 will be held in Xi'an, China. All prospective papers in the areas of antennas, propagation, electromagnetic theory, computational electromagnetic, and EMC are welcome. See Web site for complete list of topics.


2012 24th Chinese Control and Decision Conference (CCDC)

Chinese Control and Decision Conference is an annual international conference to create a forum for scientists, engineers and practitioners throughout the world to present the latest advancement in Control, Decision, Automation, Robotics and Emerging Technologies.


2012 IEEE International Frequency Control Symposium (FCS)

The 2012 IEEE International Frequency Control Symposium is one of the leading international technical conferences for research, development, and applications of frequency control. Topics include, Materials, Filters, Resonators, MEMS, Oscillators, Synthesizers, Noise, Timekeeping, Optical and Microwave Atomic Standards, Sensors and Transducers.

  • 2011 Joint conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS)

    The 65th consecutive Frequency Control Symposium, one of the leading international technical conferences for research, development, and applications of frequency control. Topics include, Materials, Filters, Resonators, MEMS, Oscillators, Synthesizers, Noise, Timekeeping, Optical and Microwave Atomic Standards, Sensors and Transducers.

  • 2010 IEEE International Frequency Control Symposium (FCS)

    The 64nd consecutive Frequency Control Symposium, one of the leading international technical conferences for research, development, and applications of frequency control. Topics include, Materials, Filters, Resonators, MEMS, Oscillators, Synthesizers, Noise, Timekeeping, Optical and Microwave Atomic Standards, Sensors and Transducers.

  • 2009 Joint Meeting of the European Frequency and Time Forum (EFTF) and the IEEE International Frequency Control Symposium (FCS)

    Authors will be invited to submit papers dealing with recent original work on the following topics: 1. Materials, Filters & Resonators 2. Oscillators, Synthesizers, Noise & Circuit Techniques 3. Microwave Frequency Standards 4. Sensors and Transducers 5. Timekeeping, Time and Frequency Transfer, GNSS and Applications 6. Optical Frequency Standards and Applications


2010 2nd International Conference on Information Technology and Computer Science (ITCS 2010)

2010 The 2nd International Conference on Information Technology and Computer Science (ITCS2010) is an international forum for researchers and practitioners from academia and industry to present current results and original research in the context of Information Technolgy and Computer Science. ITCS2010 was organized by National Technical University of Ukraine, and sponsored by Huazhong University of Science and Technology,Ternopil National Economic University, Harbin Institute of Technology, Hubei University


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Periodicals related to Ionosphere

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Geoscience and Remote Sensing, IEEE Transactions on

Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.


Plasma Science, IEEE Transactions on

Plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology; controlled thermonuclear fusion; electron, ion, and plasma sources; space plasmas; high-current relativistic electron beams; laser-plasma interactions; diagnostics; plasma chemistry and colloidal and solid-state plasmas.




Xplore Articles related to Ionosphere

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Deviations of Short Radio Waves from the London-New York Great-Circle Path

C. B. Feldman Proceedings of the IRE, 1939

During the past year experiments have been made to determine the frequency of occurrence and extent of deviations of short radio waves from the North Atlantic great-circle path. For this purpose the multiple-unit steerable antenna (Musa), described to the Institute at its 1937 convention, has been used to steer a receiving lobe horizontally. This is accomplished by arraying the unit ...


Maximum likelihood coordinate registration for over-the-horizon radar

J. L. Krolik; R. H. Anderson IEEE Transactions on Signal Processing, 1997

Over-the-horizon radar exploits the refractive and multipath nature of high- frequency propagation through the ionosphere to achieve wide-area surveillance. The coordinate registration process converts the group delays and azimuths (i.e., slant coordinates) from a set of multipath target returns to an estimate of its location (i.e., ground coordinates). This is performed by associating the target returns with ray modes determined ...


Critical support vector machine without kernel function

T. Raicharoen; C. Lursinsap Neural Information Processing, 2002. ICONIP '02. Proceedings of the 9th International Conference on, 2002

The drawback of SVM technique leads to a positive semidefinite quadratic programming problem with a dense, structured, positive semi-definite matrix, and also requires a set of kernel functions. We propose the learning algorithms that do not need any kernel functions. The separability is based on the critical Support vectors (CSV) essential to determine the locations of all separating hyperplanes. The ...


Ray trajectories in an absorptive ionosphere

E. Sonnenschein; D. Censor; I. Rutkevich; J. A. Bennett Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel, 1996

Simulates EM ray propagation in a cold collisional ionosphere in the presence of the geomagnetic field. A novel aspect is our attempt to assess the effect of absorption on the ray trajectories, not merely the field intensity. The present model is based on the familiar Appelton-Hartree dispersion equation for the cold, collisional, magnetized ionosphere, where slow variation (on the scale ...


The Heights of the Reflecting Regions in the Troposphere

A. W. Friend; R. C. Colwell Proceedings of the IRE, 1939

Observations upon the reflecting regions of the atmosphere show that in addition to the reflections from the E, Fl, and F, regions, occasional reflections occur from heights of 50 and 25 (circa) kilometers. This has been called the D region. With a very short pulse (4 to 10 microseconds) and a rapid sweep upon the oscilloscope (18,000 inches per second), ...


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Educational Resources on Ionosphere

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eLearning

Deviations of Short Radio Waves from the London-New York Great-Circle Path

C. B. Feldman Proceedings of the IRE, 1939

During the past year experiments have been made to determine the frequency of occurrence and extent of deviations of short radio waves from the North Atlantic great-circle path. For this purpose the multiple-unit steerable antenna (Musa), described to the Institute at its 1937 convention, has been used to steer a receiving lobe horizontally. This is accomplished by arraying the unit ...


Maximum likelihood coordinate registration for over-the-horizon radar

J. L. Krolik; R. H. Anderson IEEE Transactions on Signal Processing, 1997

Over-the-horizon radar exploits the refractive and multipath nature of high- frequency propagation through the ionosphere to achieve wide-area surveillance. The coordinate registration process converts the group delays and azimuths (i.e., slant coordinates) from a set of multipath target returns to an estimate of its location (i.e., ground coordinates). This is performed by associating the target returns with ray modes determined ...


Critical support vector machine without kernel function

T. Raicharoen; C. Lursinsap Neural Information Processing, 2002. ICONIP '02. Proceedings of the 9th International Conference on, 2002

The drawback of SVM technique leads to a positive semidefinite quadratic programming problem with a dense, structured, positive semi-definite matrix, and also requires a set of kernel functions. We propose the learning algorithms that do not need any kernel functions. The separability is based on the critical Support vectors (CSV) essential to determine the locations of all separating hyperplanes. The ...


Ray trajectories in an absorptive ionosphere

E. Sonnenschein; D. Censor; I. Rutkevich; J. A. Bennett Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel, 1996

Simulates EM ray propagation in a cold collisional ionosphere in the presence of the geomagnetic field. A novel aspect is our attempt to assess the effect of absorption on the ray trajectories, not merely the field intensity. The present model is based on the familiar Appelton-Hartree dispersion equation for the cold, collisional, magnetized ionosphere, where slow variation (on the scale ...


The Heights of the Reflecting Regions in the Troposphere

A. W. Friend; R. C. Colwell Proceedings of the IRE, 1939

Observations upon the reflecting regions of the atmosphere show that in addition to the reflections from the E, Fl, and F, regions, occasional reflections occur from heights of 50 and 25 (circa) kilometers. This has been called the D region. With a very short pulse (4 to 10 microseconds) and a rapid sweep upon the oscilloscope (18,000 inches per second), ...


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IEEE.tv Videos

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IEEE-USA E-Books

  • GPS and Ionosphere

    This chapter contains sections titled: Introduction Calibrating GPS ground observations Modeling GPS observations of total electron content Application to calibrations for ocean altimetry Application to ionospheric science and space weather Summary and future directions Acknowledgments References

  • Commission F: Wave Propagation and Remote Sensing

    "The purpose of this book is to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of ""Radio Science"" according to the ten topics of the Commissions that make up URSI: * Electromagnetic metrology * Fields and waves * Signals and systems * Electronics and photonics * Radio astronomy * Electromagnetic noise and interference * Wave propagation and remote sensing * Ionospheric radio and propagation * Waves in plasmas * Electromagnetics in biology and medicine This book consists of 37 original, peer-reviewed papers. The topics, authors, and reviewers were selected by the URSI Commissions. Each paper provides a critical, in-depth review of and, in many cases, tutorial on advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the 37 topics covered are the following: * Two-way satellite time and frequency transfer * Handset antennas for mobile communications * Wireless ATM networks * Ultra-high-bit-rate optical communication systems * Modeling techniques for EMC analysis * Mobile, terrestrial, and satellite propagation modeling * GPS and the ionosphere * Radio-frequency sounders in space * The early radio universe * Exposure assessment for handheld mobile communications devices A ""Collected References"" CD-ROM is an integral part of this book, intended to permit a reader to install the bibliographic database on a personal computer or workstation, so that it can be searched as needed. Independently of the papers in the boo k, the CD-ROM contains key references on the topics each Commission has deemed to be most significant during the triennium. The full titles are included in the references, and they are augmented by keywords including the country of origin for the work, to facilitate searching for the most important references on a particular topic."

  • Recent Scientific Advances in Geospace Research Using Coherent and IncoherentScatter Radars

    Radio probing of the ionosphere was one of the first examples of remote sensing of man's environmental envelope, starting with the well-documented experiments of Marconi, and Appleton and Tuve in 1902. Over the intervening century, active radio remote-sensing techniques have developed very significantly, and have been applied to the study of ?>geospace,?> the closely coupled ionosphere-thermosphere-magnetosphere-solar-wind system. Geospace research now demands high-resolution spatial and temporal measurements. This has led to the development of new experimental techniques, such as the multi- beam, dual-site, high- and very-high-frequency radars. These have been matched by novel ways of exploiting existing radar techniques, such as digital ionosondes used to make routine measurements of winds in the thermosphere and plasma velocity in the ionosphere. The review concentrates upon recent advances of scientific knowledge arising from radar studies of geospace. It highlights developments that have occurred over a very wide range of altitudes, from the mesosphere (70-90 km) to the ionospheric signatures of reconnection on the nightside that are ?> 50-100 Re from the Earth's surface. The review also points briefly to the radar developments and scientific topics that will enhance further man's understanding of geospace in the next few years.

  • Commission A: Electromagnetic Metrology

    "The purpose of this book is to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of ""Radio Science"" according to the ten topics of the Commissions that make up URSI: * Electromagnetic metrology * Fields and waves * Signals and systems * Electronics and photonics * Radio astronomy * Electromagnetic noise and interference * Wave propagation and remote sensing * Ionospheric radio and propagation * Waves in plasmas * Electromagnetics in biology and medicine This book consists of 37 original, peer-reviewed papers. The topics, authors, and reviewers were selected by the URSI Commissions. Each paper provides a critical, in-depth review of and, in many cases, tutorial on advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the 37 topics covered are the following: * Two-way satellite time and frequency transfer * Handset antennas for mobile communications * Wireless ATM networks * Ultra-high-bit-rate optical communication systems * Modeling techniques for EMC analysis * Mobile, terrestrial, and satellite propagation modeling * GPS and the ionosphere * Radio-frequency sounders in space * The early radio universe * Exposure assessment for handheld mobile communications devices A ""Collected References"" CD-ROM is an integral part of this book, intended to permit a reader to install the bibliographic database on a personal computer or workstation, so that it can be searched as needed. Independently of the papers in the boo k, the CD-ROM contains key references on the topics each Commission has deemed to be most significant during the triennium. The full titles are included in the references, and they are augmented by keywords including the country of origin for the work, to facilitate searching for the most important references on a particular topic."

  • SATNAV SIGNALS

    Satnav signals link the satellites to receivers in the user segment and the control segment. Like many other aspects of a satnav system, signals must be exquisitely engineered and carefully implemented in order for the system to provide the expected high levels of performance. This chapter provides an overview of signals and their mathematical representations, with an emphasis on direct-sequence spread spectrum (DSSS) signals and specific spreading modulations used for satnav. It introduces mathematical models for the effects of Doppler shift and propagation through the dispersive ionosphere. Satnav signals undergo Doppler shifts caused by a combination of satellite motion and receiver motion. The chapter provides a primarily qualitative discussion of satnav signal characteristics, identifying tradeoffs, and providing perspectives involving signal design choices. It then establishes the detailed mathematics of satnav signals, identifying characteristics, parameters, and models employed in descriptions of specific signals and in definition of receiver processing.

  • Spherical Cavity

    This chapter contains sections titled: Resonant Modes Wall Losses and Cavity Q Dyadic Green's Functions Schumann Resonances in the Earth-Ionosphere Cavity Problems

  • Commission H: Waves in Plasmas

    "The purpose of this book is to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of ""Radio Science"" according to the ten topics of the Commissions that make up URSI: * Electromagnetic metrology * Fields and waves * Signals and systems * Electronics and photonics * Radio astronomy * Electromagnetic noise and interference * Wave propagation and remote sensing * Ionospheric radio and propagation * Waves in plasmas * Electromagnetics in biology and medicine This book consists of 37 original, peer-reviewed papers. The topics, authors, and reviewers were selected by the URSI Commissions. Each paper provides a critical, in-depth review of and, in many cases, tutorial on advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the 37 topics covered are the following: * Two-way satellite time and frequency transfer * Handset antennas for mobile communications * Wireless ATM networks * Ultra-high-bit-rate optical communication systems * Modeling techniques for EMC analysis * Mobile, terrestrial, and satellite propagation modeling * GPS and the ionosphere * Radio-frequency sounders in space * The early radio universe * Exposure assessment for handheld mobile communications devices A ""Collected References"" CD-ROM is an integral part of this book, intended to permit a reader to install the bibliographic database on a personal computer or workstation, so that it can be searched as needed. Independently of the papers in the boo k, the CD-ROM contains key references on the topics each Commission has deemed to be most significant during the triennium. The full titles are included in the references, and they are augmented by keywords including the country of origin for the work, to facilitate searching for the most important references on a particular topic."

  • RadioFrequency Sounders in Space

    Radio-frequency sounders in space are most often referred to as topside sounders, because their original purpose was to investigate the global distribution of electron density in the ionosphere at altitudes above the F-layer peak density. They have been used predominantly for four types of investigations: (1) local and remote topside electron densities and electron- density gradients, (2) wave propagation, (3) natural emissions, and (4) stimulated plasma emissions. This paper will give a brief overview of recent results that have been obtained in these areas from investigations of ionograms from the Alouette/ISIS (International Satellites for Ionospheric Studies), Interkosmos-19/Cosmos 1809, and other topside-sounder programs, and will discuss perspectives of future investigations using radio-frequency sounders in space.

  • Commission C: Signals and Systems

    "The purpose of this book is to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of ""Radio Science"" according to the ten topics of the Commissions that make up URSI: * Electromagnetic metrology * Fields and waves * Signals and systems * Electronics and photonics * Radio astronomy * Electromagnetic noise and interference * Wave propagation and remote sensing * Ionospheric radio and propagation * Waves in plasmas * Electromagnetics in biology and medicine This book consists of 37 original, peer-reviewed papers. The topics, authors, and reviewers were selected by the URSI Commissions. Each paper provides a critical, in-depth review of and, in many cases, tutorial on advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the 37 topics covered are the following: * Two-way satellite time and frequency transfer * Handset antennas for mobile communications * Wireless ATM networks * Ultra-high-bit-rate optical communication systems * Modeling techniques for EMC analysis * Mobile, terrestrial, and satellite propagation modeling * GPS and the ionosphere * Radio-frequency sounders in space * The early radio universe * Exposure assessment for handheld mobile communications devices A ""Collected References"" CD-ROM is an integral part of this book, intended to permit a reader to install the bibliographic database on a personal computer or workstation, so that it can be searched as needed. Independently of the papers in the boo k, the CD-ROM contains key references on the topics each Commission has deemed to be most significant during the triennium. The full titles are included in the references, and they are augmented by keywords including the country of origin for the work, to facilitate searching for the most important references on a particular topic."

  • Commission B: Fields and Waves

    "The purpose of this book is to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of ""Radio Science"" according to the ten topics of the Commissions that make up URSI: * Electromagnetic metrology * Fields and waves * Signals and systems * Electronics and photonics * Radio astronomy * Electromagnetic noise and interference * Wave propagation and remote sensing * Ionospheric radio and propagation * Waves in plasmas * Electromagnetics in biology and medicine This book consists of 37 original, peer-reviewed papers. The topics, authors, and reviewers were selected by the URSI Commissions. Each paper provides a critical, in-depth review of and, in many cases, tutorial on advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the 37 topics covered are the following: * Two-way satellite time and frequency transfer * Handset antennas for mobile communications * Wireless ATM networks * Ultra-high-bit-rate optical communication systems * Modeling techniques for EMC analysis * Mobile, terrestrial, and satellite propagation modeling * GPS and the ionosphere * Radio-frequency sounders in space * The early radio universe * Exposure assessment for handheld mobile communications devices A ""Collected References"" CD-ROM is an integral part of this book, intended to permit a reader to install the bibliographic database on a personal computer or workstation, so that it can be searched as needed. Independently of the papers in the boo k, the CD-ROM contains key references on the topics each Commission has deemed to be most significant during the triennium. The full titles are included in the references, and they are augmented by keywords including the country of origin for the work, to facilitate searching for the most important references on a particular topic."



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