Space Weather and Telecommunications
BeschreibungSpace weather has an enormous influence on modern telecommunication systems even though we may not always appreciate it. We shall endeavor throughout this monograph to expose the relationships between space weather factors and the performance (or lack thereof) of telecommunication, navigation, and surveillance systems. Space weather is a rather new term, having found an oMicial expression as the result of several government initiatives that use the term in the title of programs. But it is the logical consequence of the realization that space also has weather, just as the lower atmosphere has weather. While the weather in space will influence space systems that operate in that special environment, it is also true that space weather will influence systems that we understand and use here on terra firma. This brings space weather home as it were. It is not some abstract topic of interest to scientists alone; it is a topic of concern to all of us. I hope to make this clear as the book unfolds. Why have I written this book? First of all, I love the topic. While at the Naval Research Laboratory (NRL), I had the opportunity to do research on many topics including: Thomson scatter radar and satellite beacon studies of the ionosphere, utilization of the NASA Gemini platform for ionospheric investigations, microwave radar propagation studies, I-IF signal intercept and direction-finding experiments, and multi-disciplinary studies of certain physical phenomena relevant to weapon systems development.
InhaltsverzeichnisPreface 1: Introduction
1.2 Definition of Space Weather
1.3 An Historical Perspective
1.4 The Advent of Space Weather Programs
1.5 Categories of Radio Systems
1.6 Other Influences on Systems
1.7 Space Weather Data Utilization
1.10 Bibliography 2: The Origins Of Space Weather
2.2 The Sun and its Influence
2.3 Magnetosphere and Geomagnetic Storms
2.4 Motivation for Space Weather Observations
2.5 References 3: The Ionosphere
3.2 General Properties of the Ionosphere
3.3 Equilibrium Processes
3.4 Description of the Ionospheric Layers
3.5 Diurnal Behavior of the Ionospheric Layers
3.6 Long-Term Solar Activity Dependence
3.8 The High Latitude Ionosphere
3.9 Ionospheric Response to Solar Flares
3.10 The Ionospheric Storm
3.11 Ionospheric Current Systems
3.12 Ionospheric Models
3.13 Ionospheric Predictions
3.14 Science Issues and Challenges
3.15 References 4: Telecommunication Systems
4.2 Outline of Ionospheric Effects
4.3 Terrestrial Telecommunications
4.4 Earth-Space Telecommunications
4.5 Space Weather Support for Systems
4.6 References 5: Prediction Services and Systems
5.3 Elements of the Prediction Process
5.4 Organizational Approaches
5.5 Commercial Forecasting Services
5.6 Systems for Forecasting
5.7 Concluding Remark
5.8 References 6: Research Activities and Programs
6.2 National Space Weather Program
6.3 Living with a Star 6.4 Data Assimilation and Transfer
6.5 Military Space Weather Involvement
6.6 International Initiatives
6.7 Scientific and Professional Organizations
6.8 Research Programs and Activities
6.9 Agencies Institutions and Companies
6.10 Comment on Internet Resources
6.11 References 7: Epilogue
- Featuring an interview with the Director of SEC
Acronyms And Terms
About the Author
PortraitJohn Goodman received his BS in Nuclear Engineering from N.C. State University in 1960 and his PhD in Physics from Catholic University of America in 1970. He has 44 years of government and industry experience in the RDT&E associated with radio and radar systems with emphasis on those categories that are influenced by the ionosphere. Specialties have included SATCOM and HF system impairment studies and the development of real-time-channel evaluation subsystems. He was with the Naval Research Laboratory from 1960-1991, and served a brief stint as Principal Scientific Consultant for Radio Communications at the SHAPE Technical Center at The Hague in the mid-80s. He was Program Manager for Radio Communications Technology at SRI International from 1991-1994, and he was Vice President for Applied Technology at TCI/BR Communications, headquartered in Sunnyvale California between 1994 and 1998. He is currently Vice President and Chief Technical Officer for Radio Propagation Services, Inc. (RPSI). Dr. Goodman has numerous publications, and he has been the Guest Editor for Special Issues of Radio Science issues on several occasions. He has organized a number of topical conferences, most notably the series of IES conferences held every three years since 1975. He is also author of the text: HF Communications: Science & Technology published by Van Nostrand Reinhold , and a Chapter on "Meteor Burst Communications" in the Encyclopedia of Telecommunications published by Marcel Dekker. . He has been a guest author of an article entitled "Characteristics of the Ionosphere" appearing in the Wiley Encyclopedia of Electrical and Electronics Engineering . Dr. Goodman has lectured on a variety of space science issues, and has conducted specialized training courses under the aegis of the George Washington University.
Early in his career at NRL, Dr. Goodman was involved in radar investigations of the atmosphere and relevant space objects. He developed an interest in space science, and began measurement of the ionospheric electron content using Faraday rotation of lunar echoes. He conducted studies of the ionosphere using incoherent scatter radar technology, eventually using this topic as inspiration for his PhD dissertation. He was one of the first investigators to observe positive phase excursions in TEC associated with geomagnetic storms. He was the Principal Investigator for GEMINI Experiment D14 designed to investigate ionospheric inhomogeneities, at a time when such measurements were either sparse or nonexistent. He also investigated UHF and L-Band scintillation phenomena associated with the Timation Satellite, an early prototype of the NAVSTAR/GPS system. He managed a team responsible for recovery and dissemination of SOLRAD 11A/B data, and. and he was the originator of a well-known method for updating climatological models based upon pseudo-sunspot numbers derived from sounders. Dr Goodman continued these model update studies at SRI
Pressestimmen"Goodman writes chronologically, and often describes his professional experiences as if recording a scientific jounral or diary. Thus, it is easy to follow the complex threads of physical science inquiry, as he travels from meeting to meeting where other scientists also present their findings.One need not be a mathematician to interpret the meanings of a few dozen equations. A bachelor's degree in physics, a related science, or engineering will suffice to comprehend fully the concepts.
In the first part, attention is given to the sun, the magnetosphere and geomagnetic storms, and the ionosphere. There is an excellent summary of recent work in modeling and prediction, and the author makes the point that 'we are now unfortunately faced with the job of predicting outcomes from models driven by parameters that also need to be predicted,' and continues on to address the unvertainty in this process. Readers engaged in the space weather field will find an excellent overview of the topic, which includes storm and ionospheric modeling. Attention is given to ionospheric layers, sporadic-E, solar flares, European Union (EU) COST action models, and scintillation models. A significant feature of the first part is that the names and organizations of researchers are cited. This allows the reader to reach into the literature for additional technical details about this research, most of which is recent or current.
The second part is devoted to studying propagation in the bands from extremely low frequency through extremely high frequency, which is essentially the entire real-world telecommunications spectrum. The growth in technology, including the extensive use of global positioning systems, suggests that this part has many innovations, particularly in the high frequency spectrum, in which the author makes the connection to space weather...
Goodman has produced a book that is readable, and presents a comprehensive up-to-date overview of the relationship between space weather and the telecommunications field. Written primarily for physical science specialists and engineers, it also will be useful to licensed amateur radio operators engaged in voice, CW, and data communications, who must deal with the practical impact of propagation every time they are on the air."
Reviewed by L.C. Silvern
"To recount in parallel the development of space weather services and telecommunications makes for a story that is both complex and simple, as seen in John M. Goodman's new book, Space Weather & Telecommunications. It is complex because there are so many facets to the relationship; it is simple because it is a straightforward story of cause and effect.
Space weather can be addressed scientifically-- the standard university-level text approach-- but to do so leaves the topic unfounded and disjointed from a societal perspective. In this book the author takes great pains to describe (1) numerous aspects of why space weather matters for the user community; (2) the programmatic aspects (both nationally and internationally) that define the practice of space weather; and (3) new, emerging activities that are devoted to the proper integration of space weather products and services in the 21st century...
The book covers a wide expanse in quick fashion but gives numerous references if the reader wants more details. The prime strength of the work is that it brings together, in a manner palatable to a general audience, the story of how space weather affects the developing technologies that make up modern telecommunications systems.
This book is a good work to supplement the standard technical library of a graduate student and will bring a sense of the breadth and the evolving nature of the space weather and telecommunications issues that exist today."
Reviewed by Joseph Kunches, NOAA Space Environment Center
Untertitel: 141 illus. Sprache: Englisch.
Verlag: Springer-Verlag GmbH
Erscheinungsdatum: Januar 2005