Download or read book Large Scale Optical Mapping of the Ionosphere written by E. J. Weber and published by . This book was released on 1977 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new instrument for all sky, spectrophotometric imaging of aurora and airglow was installed in the Air Force Geophysics Laboratory's Airborne Ionospheric Observatory. Initial observations of equatorial and near-equatorial 6300 angstroms OI airglow show the existence of north-south aligned regions of airglow depletion. These dark bands often extend more than 1200 km in the north-south direction and 50 to 200 km in the east-west direction. Simultaneous airborne ionospheric soundings indicate that these regions of airglow depletion are characterized by an increase in the virtual height of the F-layer. A simple model of field aligned electron density depletion in the bottomside of the F-layer explains both the airglow observations and the ionospheric soundings. Initial auroras zone measurements show the structure and dynamics of the subvisual auroras in the noon sector that result from dayside precipitation. UHF satellite-to-aircraft propagation through the f-region auroras result in amplitude scintillations, both in the noon and midnight local time sectors. (Author).
Download or read book Large Scale Optical Mapping of the Ionosphere written by and published by . This book was released on 1977 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new instrument for all sky, spectrophotometric imaging of aurora and airglow was installed in the Air Force Geophysics Laboratory's Airborne Ionospheric Observatory. Initial observations of equatorial and near-equatorial 6300 angstroms OI airglow show the existence of north-south aligned regions of airglow depletion. These dark bands often extend more than 1200 km in the north-south direction and 50 to 200 km in the east-west direction. Simultaneous airborne ionospheric soundings indicate that these regions of airglow depletion are characterized by an increase in the virtual height of the F-layer. A simple model of field aligned electron density depletion in the bottomside of the F-layer explains both the airglow observations and the ionospheric soundings. Initial auroras zone measurements show the structure and dynamics of the subvisual auroras in the noon sector that result from dayside precipitation. UHF satellite-to-aircraft propagation through the f-region auroras result in amplitude scintillations, both in the noon and midnight local time sectors. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Mapping of Mid latitude Ionosphere written by Richard S. Allen and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maps of the monthly median of refractive effects are used by precision navigation and radar systems to correct for measurement errors caused by the ionosphere. Calculated off line using available climatologies of the pertinent ionospheric parameters, they are used in real time systems to remove 70 to 75 percent of the monthly rms error. When greater precision is required, these maps may be adapted by any of several local measurements of current ionospheric conditions. The residual refractive error is dependent on the density of these local measurements in space and time and on their ability to characterize the current ionosphere. Systematic variations of the ionosphere are usefully predicted over a few hours. Local features that have large geophysical scale size, such as the nighttime trough and the plasmapause enhancement of the mid-latitude ionosphere, are tracked by sequential measurements and may be mapped in space and local time across the entire system field of view during quiet geophysical periods. During disturbed periods, however, their dynamic behavior may require more frequent specifications and, in addition, very large features can develop which are sharply confined to small areas of the coverage region.
Download or read book Report on Research at AFCRL written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1976 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Mapping of Mid latitude Ionosphere written by Richard S. Allen and published by . This book was released on 1977 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maps of the monthly median of refractive effects are used by precision navigation and radar systems to correct for measurement errors caused by the ionosphere. Calculated off line using available climatologies of the pertinent ionospheric parameters, they are used in real time systems to remove 70 to 75 percent of the monthly rms error. When greater precision is required, these maps may be adapted by any of several local measurements of current ionospheric conditions. The residual refractive error is dependent on the density of these local measurements in space and time and on their ability to characterize the current ionosphere. Systematic variations of the ionosphere are usefully predicted over a few hours. Local features that have large geophysical scale size, such as the nighttime trough and the plasmapause enhancement of the mid-latitude ionosphere, are tracked by sequential measurements and may be mapped in space and local time across the entire system field of view during quiet geophysical periods. During disturbed periods, however, their dynamic behavior may require more frequent specifications and, in addition, very large features can develop which are sharply confined to small areas of the coverage region.
Download or read book Enlarged Space and Ground Data Base for Ionospheric Modelling written by COSPAR. Plenary Meeting and published by Elsevier Science & Technology. This book was released on 1991 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to the Interstellar Medium written by Jonathan P. Williams and published by Cambridge University Press. This book was released on 2021-02-18 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gas and dust between the stars emit across the electromagnetic spectrum and are found in a range of physical conditions from diffuse plasmas to cold, dense molecules. Through their study we see how quantum processes shape the structure of our Galaxy and fluid mechanics sets the stellar mass scale. The Interstellar Medium is a very broad subject with layers of complexity, a long history and a steady flow of new results. This comprehensive yet accessible textbook provides a self-contained one-semester course for advanced undergraduate or beginning graduate students. It is written in a style that students can follow by themselves and allows instructors to use class time to go deeper into the details or show applications to current research. It makes extensive use of publicly accessible data to illustrate specific points and to encourage students to learn by performing their own analyses.
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.
Download or read book Radio Science written by and published by . This book was released on 1983 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large Scale Disasters written by Mohamed Gad-el-Hak and published by Cambridge University Press. This book was released on 2008-06-23 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Extreme' events - including climatic events, such as hurricanes, tornadoes, drought - can cause massive disruption to society, including large death tolls and property damage in the billions of dollars. Events in recent years have shown the importance of being prepared and that countries need to work together to help alleviate the resulting pain and suffering. This volume presents an integrated review of the broad research field of large-scale disasters. It establishes a common framework for predicting, controlling and managing both manmade and natural disasters. There is a particular focus on events caused by weather and climate change. Other topics include air pollution, tsunamis, disaster modeling, the use of remote sensing and the logistics of disaster management. It will appeal to scientists, engineers, first responders and health-care professionals, in addition to graduate students and researchers who have an interest in the prediction, prevention or mitigation of large-scale disasters.
Download or read book National Union Catalog written by and published by . This book was released on 1982 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.
Download or read book Pollution written by E.S. Barrekette and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid deterioration of the environment in many countries around the world, or of segments and aspects of the environment in specific locations, made it necessary that immediate - even if only short term - solutions be found to as many of these problems as possible. Nevertheless, in the long run, long range and long term solutions must be found taking into account the effects of one country or region on another as well as of the inter-action between the different types of pollution over extended periods of time. It was the purpose of the Tel Aviv meeting on Pollution: Engineering and Scientific Solutions, to address presently known or foreseeable "environmental insults;" that is, to focus on those aspects of air, noise, land, water or any other environmental quality for which there already exist engineering, scientific, legal or other solutions. Consequently, people from all disci plines which are relevant to environmental problems and their solutions were invited to participate.
Download or read book Large Scale Fluctuations of the Ionosphere written by K. Bibl and published by . This book was released on 1964 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: By statistics based on ionogram data of three European stations amplitudes and quasi-periods of the fluctuations and their directions are determined. Different periods of the day, seasons and in-or de-creasing changes are treated separately. The oscillations found tend to produce higher electron density during downwards movement. (Author).
Download or read book Cross Scale Coupling and Energy Transfer in the Magnetosphere Ionosphere Thermosphere System written by Yukitoshi Nishimura and published by Elsevier. This book was released on 2021-12-07 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System provides a systematic understanding of Magnetosphere-Ionosphere-Thermosphere dynamics. Cross-scale coupling has become increasingly important in the Space Physics community. Although large-scale processes can specify the averaged state of the system reasonably well, they cannot accurately describe localized and rapidly varying structures in space in actual events. Such localized and variable structures can be as intense as the large-scale features. This book covers observations on quantifying coupling and energetics and simulation on evaluating impacts of cross-scale processes. It includes an in-depth review and summary of the current status of multi-scale coupling processes, fundamental physics, and concise illustrations and plots that are usable in tutorial presentations and classrooms. Organized by physical quantities in the system, Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System reviews recent advances in cross-scale coupling and energy transfer processes, making it an important resource for space physicists and researchers working on the magnetosphere, ionosphere, and thermosphere. Describes frontier science and major science around M-I-T coupling, allowing for foundational understanding of this emerging field in space physics Reviews recent and key findings in the cutting-edge of the science Discusses open questions and pathways for understanding how the field is evolving
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar and Space Physics written by National Research Council and published by National Academies Press. This book was released on 2014-09-25 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2010, NASA and the National Science Foundation asked the National Research Council to assemble a committee of experts to develop an integrated national strategy that would guide agency investments in solar and space physics for the years 2013-2022. That strategy, the result of nearly 2 years of effort by the survey committee, which worked with more than 100 scientists and engineers on eight supporting study panels, is presented in the 2013 publication, Solar and Space Physics: A Science for a Technological Society. This booklet, designed to be accessible to a broader audience of policymakers and the interested public, summarizes the content of that report.
