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Author: Joseph N. Pelton
Publisher:
ISBN: 9781461464235
Category : Artificial satellites
Languages : en
Pages :
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Book Description
Author: Joseph N. Pelton
Publisher:
ISBN: 9781461464235
Category : Artificial satellites
Languages : en
Pages :
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Book Description
Author: Teresa M. Braun
Publisher: John Wiley & Sons
ISBN: 1118345207
Category : Science
Languages : en
Pages : 400
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Book Description
This is the first book primarily about the satellite payload of satellite communications systems. It represents a unique combination of practical systems engineering and communications theory. It tells about the satellites in geostationary and low-earth orbits today, both the so-called bent-pipe payloads and the processing payloads. The on-orbit environment, mitigated by the spacecraft bus, is described. The payload units (e.g. antennas and amplifiers), as well as payload-integration elements (e.g. waveguide and switches) are discussed in regard to how they work, what they do to the signal, their technology, environment sensitivity, and specifications. At a higher level are discussions on the payload as an entity: architecture including redundancy; specifications--what they mean, how they relate to unit specifications, and how to verify; and specification-compliance analysis (“budgets”) with uncertainty. Aspects of probability theory handy for calculating and using uncertainty and variation are presented. The highest-level discussions, on the end-to-end communications system, start with a practical introduction to physical-layer communications theory. Atmospheric effects and interference on the communications link are described. A chapter gives an example of optimizing a multibeam payload via probabilistic analysis. Finally, practical tips on system simulation and emulation are provided. The carrier frequencies treated are 1 GHz and above. Familiarity with Fourier analysis will enhance understanding of some topics. References are provided throughout the book for readers who want to dig deeper. Payload systems engineers, payload proposal writers, satellite-communications systems designers and analysts, and satellite customers will find that the book cuts their learning time. Spacecraft-bus systems engineers, payload unit engineers, and spacecraft operators will gain insight into the overall system. Students in systems engineering, microwave engineering, communications theory, probability theory, and communications simulation and modelling will find examples to supplement theoretical texts.
Author: M. Richharia
Publisher:
ISBN: 9780333987766
Category :
Languages : en
Pages :
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Book Description
Author: Don I. Dalgleish
Publisher: IET
ISBN: 9780863411328
Category : Technology & Engineering
Languages : en
Pages : 362
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Book Description
Deals with the physics and geometry of the geostationary orbit, and the construction and operation of satellites and launch vehicles. Gives a thorough analysis of essential factors governing the quality of speech, data, and television signals received via satellite. Particular attention is paid to the use of satellites for maritime, aeronautical and land-mobile communications and VSATs (very-small aperture terminals). Annotation copyrighted by Book News, Inc., Portland, OR
Author: Peter Berlin
Publisher: Cambridge University Press
ISBN: 0521335256
Category : Science
Languages : en
Pages : 233
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Book Description
Very Good,No Highlights or Markup,all pages are intact.
Author: Donald M. Jansky
Publisher: Artech House Publishers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 656
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Book Description
Author: Arthur C. Clarke
Publisher: Hachette UK
ISBN: 0575121882
Category : Fiction
Languages : en
Pages : 363
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Book Description
Arthur C. Clarke has been one of the most influential commentators on - and prophets of - the communications technology which has created the global village. Now, drawing partly on his own sometimes very personal writings, he provides an absorbing history and survey of modern communications. The story begins with the titanic struggles to lay transatlantic telegraph cables in the nineteenth century. Fighting against widespread scepticism, lack of funds, technical disasters and setbacks - and against the Atlantic itself, above and below the surface - the pioneers achieved the seemingly impossible and by 1858 Britain and America were linked by Telegraph. Nearly a century later, as the first transatlantic telephone cable was being laid, the technology that would rival and perhaps even supersede it was undergoing its painful birth as scientists developed the communications satellite precisely as Clarke first described in his famous 1945 article Wireless World, 'Extra-terrestrial Relays', reprinted in this book. The rivalry between cable and satellite continued through the decades. Communication satellites (Comsats) performed even beyond the most optimistic expectations, but cable fought back with the development of the transistor. Then, in one of the most dramatic and unexpected breakthroughs in any technology, the potential of cable systems was transformed. The development of fibre optics technology meant that once more the seabeds of the world began to be draped with the newest and most sophisticated artefacts of human engineering. It is an enthralling story, filled with extraordinary events and people, and Arthur C. Clarke brings all his storytelling flair and scientific expertise to bear on it. The result is a superb combination of history, comment and challenging speculation.
Author: Larry Martinez
Publisher: Artech House Publishers
ISBN:
Category : Business & Economics
Languages : en
Pages : 218
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Book Description
Author: Audrey L. Allison
Publisher: Springer Science & Business
ISBN: 3319053140
Category : Technology & Engineering
Languages : en
Pages : 102
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Book Description
Access to satellite orbits and spectrum is managed by the ITU, a United Nations body that strives to extend the benefits of new technologies to the world, while ensuring equitable access to these resources. This book explores how the ITU approaches these dual missions in light of the increasing saturation of the geostationary orbit by a vibrant global satellite industry and the rising interests of developing countries in accessing these limited resources. These issues were the subject of debate at the 2012 World Radiocommunication Conference. This book describes and assesses various regulatory approaches undertaken to manage the increasing requests for access to space and especially access to spectrum and orbital locations in the geosynchronous or “The Clarke” orbit.
Author: Ray E. Sheriff
Publisher: John Wiley & Sons
ISBN: 0470852577
Category : Technology & Engineering
Languages : en
Pages : 386
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Book Description
Mobile satellite services are set to change with the imminent launch of satellite personal communication services (S-PCS), through the use of non-geostationary satellites. This new generation of satellites will be placed in low earth orbit or medium earth orbit, hence, introducing new satellite design concepts. One of the first texts to cover this rapidly evolving field, this text provides the reader with an overview of mobile satellite systems, from their initial introduction (Inmarsat), current satellite-PCS (referring to such systems as Globalstar), through to Satellite-UMTS and an understanding of the following: * The design concepts associated with non-geostationary satellite systems (constellation, link budgets, Doppler) * The concepts of UMTS (network architecture, aims, in the context of IMT-2000) and the role foreseen for the satellite component (complementary to terrestrial network, network extension, global availability) * Inter-working between satellite and terrestrial networks (network architecture, ATM Adaptation Layer) * Radio interface technologies (WB-CDMA, TDMA, transmission environment) * Regulatory issues * Future services and applications * Potential satellite markets (prediction techniques, effect of tariffing policies on potential market) With leading edge information, this valuable resource will be indispensable to researchers, engineers, operators and market evaluators in satellite service industries and research institutions, as well as postgraduates and research students in the field.
