Author : United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Space Science and Applications
Publisher :
Page : 264 pages
File Size : 45,24 MB
Release : 1970
Category : Artificial satellites in telecommunication
ISBN :
Committee Serial No. 12. Reviews past accomplishments, present programs, and feasibility of future NASA communications satellite programs.
Author : United States. Congress. House. Science and Astronautics
Publisher :
Page : 352 pages
File Size : 30,43 MB
Release : 1970
Category :
ISBN :
Author : Joseph H. Yuen
Publisher : Springer Science & Business Media
Page : 615 pages
File Size : 41,51 MB
Release : 2013-04-17
Category : Technology & Engineering
ISBN : 1475749236
The challenge of communication in planetary exploration has been unusual. The guidance and control of spacecraft depend on reliable communication. Scientific data returned to earth are irreplaceable, or replaceable only at the cost of another mission. In deep space, communications propagation is good, relative to terrestrial communications, and there is an opportunity to press toward the mathematical limit of microwave communication. Yet the limits must be approached warily, with reliability as well as channel capacity in mind. Further, the effects of small changes in the earth's atmosphere and the interplanetary plasma have small but important effects on propagation time and hence on the measurement of distance. Advances are almost incredible. Communication capability measured in 18 bits per second at a given range rose by a factor of 10 in the 19 years from Explorer I of 1958 to Voyager of 1977. This improvement was attained through ingenious design based on the sort of penetrating analysis set forth in this book by engineers who took part in a highly detailed and amazingly successful pro gram. Careful observation and analysis have told us much about limitations on the accurate measurement of distance. It is not easy to get busy people to tell others clearly and in detail how they have solved important problems. Joseph H. Yuen and the other contribu tors to this book are to be commended for the time and care they have devoted to explicating one vital aspect of a great adventure of mankind.
Author : Daniel Minoli
Publisher : John Wiley & Sons
Page : 448 pages
File Size : 37,63 MB
Release : 2015-03-16
Category : Technology & Engineering
ISBN : 1118984056
Surveys key advances in commercial satellite communications and what might be the implications and/or opportunities for end-users and service providers in utilizing the latest fast-evolving innovations in this field This book explores the evolving technical options and opportunities of satellite networks. Designed to be a self-contained reference, the book includes background technical material in an introductory chapter that will serve as a primer to satellite communications. The text discusses advances in modulation techniques, such as DBV-S2 extensions (DVS-S2X); spotbeam-based geosynchronous and medium earth orbit High Throughput Satellite (HTS) technologies and Internet applications; enhanced mobility services with aeronautical and maritime applications; Machine to Machine (M2M) satellite applications; emerging ultra HD technologies; and electric propulsion. The author surveys the latest innovations and service strategies and the resulting implications, which involves: Discussing advances in modulation techniques and HTS spotbeam technologies Surveying emerging high speed aeronautical mobility services and maritime and other terrestrial mobility services Assessing M2M (machine-to-machine) applications, emerging Ultra HD video technologies and new space technology Satellite communication is an integral part of the larger fields of commercial, television/media, government, and military communications, because of its multicast/broadcast capabilities, mobility, reliability, and global reach. High Throughput Satellites) are expected to revolutionize the field during this decade, providing very high speed, yet cost-effective, Internet access and connectivity anywhere in the world, in rural areas, in the air, and at sea. M2M connectivity, enabled by satellite communications, connects trucks on transcontinental trips, aircraft in real-time-telemetry aggregation, and mercantile ships. A comprehensive analysis of the new advances in satellite communications, Innovations in Satellite Communications Technology is a reference for telecommunications and satellite providers and end-users, technology investors, logistic professionals, and more.
Author : United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Space Science and Applications
Publisher :
Page : 48 pages
File Size : 19,20 MB
Release : 1970
Category : Interstellar communication
ISBN :
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
Page : 59 pages
File Size : 12,32 MB
Release : 2019-12-03
Category : Computers
ISBN : 0309498988
An Assessment of the Communications Technology Laboratory at the National Institute of Standards and Technology: Fiscal Year 2019 is an independent technical assessment of the quality of the National Institute of Standards and Technology's (NIST's) Communications Technology Laboratory (CTL). It reviews the organization's technical programs, the portfolio of scientific expertise within the organization, the adequacy of the organization's facilities, equipment, and human resources, and the effectiveness by which the organization disseminates its program outputs. This report focuses on CTL priority areas such as public safety communications, trusted spectrum testing, and Next Generation Wireless (5G and Beyond). It also assesses the extent to which CTL applied the recommendations from a 2015 National Academies' report, which describes many of the critical uses of radio communications, provides lab-specific recommendations, and highlights important research priorities for the Boulder, Colorado communications technology laboratory of the Department of Commerce laboratory. This new report also describes the current activities of the Boulder telecommunications laboratories, its strengths and weaknesses as an organization, and its plans for the near future
Author :
Publisher :
Page : 704 pages
File Size : 41,52 MB
Release : 1995
Category : Aeronautics
ISBN :
Author : National Research Council
Publisher : National Academies Press
Page : 98 pages
File Size : 46,27 MB
Release : 2007-02-16
Category : Science
ISBN : 0309102979
The Space Communications Office (SCO) at NASA has two primary roles. The first is to manage two of the communications networks that enable spaceflight operations and research, and the second is to integrate agency-wide telecommunications issues. In 2005, NASA asked the NRC to review the effectiveness of the SCO in carrying out its responsibilities by assessing the overall quality of the space communications program. This report presents a review of each of the program elements within the SCOâ€"the space network, NASA's integrated space network (NISN), spectrum management, standards management, search and rescue, communications and navigation architecture, technology, and operations integration. The review focuses on formulation of plans for each element, plan development methodology, connections with the broader community, and overall capabilities. Recommendations for improving SCO operations and organization are provided.
Author : Ajay Prasad
Publisher : Springer Nature
Page : 562 pages
File Size : 44,62 MB
Release :
Category :
ISBN : 9819700523
Author : United States. National Aeronautics and Space Administration
Publisher :
Page : 144 pages
File Size : 50,47 MB
Release : 1991
Category : Space sciences
ISBN :
