The potential threat posed by Leonid meteroids to orbiting spacecraft over the next several years calls for new dynamic mitigation strategies to assist the satellite community in reducing the danger to its vehicles. This book offers deliberate dynamic mitigation strategies to complement the traditional shielding strategies, providing mission operators additional ways to decrease the danger. Five different attitude control and orbit maneuvering options are examined in detail. The information is presented in algorithmic form to allow technically competent, but meteoroid inexperienced, operators to easily understand the phenomena, assess the danger, and implement procedures. Although general in scope, the book emphasizes the Leonid meteor events of the 1998-2002 timeframe.

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.

Gallium Arsenide IC Applications Handbook is the first text to offer a comprehensive treatment of Gallium Arsenide (GaAs) integrated chip (IC) applications, specifically in microwave systems. The books coverage of GaAs in microwave monolithic ICs demonstrates why GaAs is being hailed as a material of the future for the various advantages it holds over silicon. This volume provides scientists, physicists, electrical engineers, and technology professionals and managers working on microwave technology with practical information on GaAs applications in radar, electronic warfare, communications, consumer electronics, automotive electronics and traffic control. Includes an executive summary in each volume and chapter Facilitates comprehension with its tutorial writing style Covers key technical issues Emphasizes practical aspects of the technology Contains minimal mathematics Provides a complete reference list

Innovations in Telecommunications, Part B covers the proceedings of the 1981 International Symposium Series on "Innovations in Telecommunications, held in Kuwait, sponsored by the Kuwait Foundation for the Advancement of Science. This symposium aims to explore the advances in research, development, demonstration, design, manufacture, field testing, and application in telecommunication. This book is organized into two parts encompassing 13 chapters that focus on satellite communication and its applications. Following a brief historical introduction, Part I deals first with the fundamental principles of information transmission through satellite, emphasizing the role of the basic parameters entering into the satellite up- and down-link budgets. These topics are followed by discussions on the development of satellite systems for international, domestic, and maritime communications. This part also describes the technology of satellite TV broadcasting systems, both ground and space, as well as the development of communication satellite earth stations. Part II surveys the technologies in computer networks, application development, and system programs that are converging to form national and international networks. This part also highlights the development of electronic mail systems and principal modes and techniques in teleconferencing. Telecommunications engineers and researchers will find this book rewarding.

Emerging Trends from European Research. BThe way the book is structured and enhanced makes it an ideal reference book for managers, academics, researchers and system designers in the communications field./B BRBRI- Harry Skianis, Computing Reviews about the 2009 edition of Towards