"This book is by far the most comprehensive and orderly treatment of the subject. It is the work of experts with a wealth of both theoretical and practical experience with the subject and its connecting disciplines. It is an integral work... concepts and notation are at the same consistent level throughout the book. Quality of Service (QoS) is an absolutely critical part of any telecommunication services. This work fills a gap in the literature of what possibilities there are for satellites in providing global Internet services." Excerpted from the Foreword by Raymond L. Pickholtz, The George Washington University
List of Figures. List of Tables. Foreword. Preface. 1. Overview of Broadband Satellite Networks. Part I: Principles of Satellite Networks. 2. Basics of Networks. 3. Satellite Systems Engineering Methodology. 4. Network Systems and Examples. 5. Quality of Service in Layered Architecture. Part II: Satellite Network Technical Challenges. 6. Physical and Link Layers. 7. Satellite TCP/IP: Technical Challenges. 8. Satellite ATM: Technical Challenges. 9. Standards and Regulations. Part III: Satellite IP Networks Performance. 10. Quality of Service in IP Networks. 11. Performance of DiffServ Based Satellite IP. 12. Performance of MPLS. 13. Interactive Multimedia over Satellite. Part IV: Satellite ATM Networks Performance. 14. Quality of Service in ATM Networks. 15. Performance Analysis of TCP over Satellite ATM. 16. Bandwidth Allocation - An Example. References. Acronyms. Index. About the Authors.
the wave theory foundations of today's radio occultation techniques<br> <br> Forty years ago, the premier radio occultation problem was how to profile the atmosphere and radius of Mars using signals sent by the Mariner 4 spacecraft. Researchers then could rely on ray theory-based techniques for accurate analysis of the thin, uniform Martian atmosphere. Today's radio occultation challenges mostly involve communications platforms-and related data, instrument systems, and applications-in the Earth's own atmosphere. To deal with the density and complexity of this multilayered medium, an analytical framework that goes beyond ray theory is needed.<br> <br> Setting the cutting edge for the field, Radio Occultations Using Earth Satellites: A Wave Theory Treatment develops a purely wave-theoretic approach to occultation analysis. This approach yields more nuanced results than either ray or hybrid (ray/wave) methodologies offer, and proves suitable for the many variables at work in today's problems.<br> <br> This groundbreaking text provides:<br> * An introduction to the general theory of radio occultations<br> * Development of ray theory and scalar diffraction treatments of radio propagation processes<br> * Development of a wave theoretic treatment of the above wave propagation processes<br> * The correspondence between wave and ray theories<br> * A discussion of how to use a wave-theoretic approach to infer the refractive properties of the propagation medium from a time series set of observations of the propagated wave's phase and amplitude<br> <br> A comprehensive resource that clearly defines the latest topics and methodologies, Radio Occultations Using Earth Satellites is a must-have text for engineers, scientists, students, and managers in satellites communications, navigation, deep space and planetary exploration, aerospace, atmospheric science, physics, and engineering.<br> <br> The Deep Space Communications and Navigation Series is authored by scientists and engineers with extensive experience in astronautics, communications, and related fields. It lays the foundation for innovation in the areas of deep space navigation and communications by disseminating state-of-the-art knowledge in key technologies.
The accessibility of health information on the Internet has revolutionized access to clinical information for health practitioners and patients. This access to information has the potential to make a major contribution to health care. However, the effective use of this accessibility depends on an understanding of all the issues involved, from the underlying technologies and economic pressures, to questions of how best to manage quality and privacy, how people seek and use information, and what the barriers to its use are. Cullen's book also examines the extent of health information on the Internet, the providers of websites and their content, and outlines the nature of the paradigm shift affecting knowledge in the health sector.
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