Download or read book Duplex Direct Data Distribution System written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-30 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Glenn Research Center (GRC) is developing and demonstrating communications and network technologies that are helping to enable the near-Earth space Internet. GRC envisions several service categories. The first of these categories is direct data distribution or D3 (pronounced "D-cubed"). Commercially provided D3 will make it possible to download a data set from a spacecraft, like the International Space Station. as easily as one can extract a file from a remote server today, using a file transfer protocol. In a second category, NASA spacecraft will make use of commercial satellite communication (SATCOM) systems. Some of those services will come from purchasing time on unused transponders that cover landmasses. While it is likely there will be gaps in service coverage, Internet services should be available using these systems. This report addresses alternative methods of implementing a full duplex enhancement of the GRC developed experimental Ka-Band Direct Data Distribution (D3) space-to-ground communication link. The resulting duplex version is called the Duplex Direct Data Distribution (D4) system. The D4 system is intended to provide high-data-rate commercial direct or internet-based communications service between the NASA spacecraft in low earth orbit (LEO) and the respective principal investigators associated with these spacecraft. Candidate commercial services were assessed regarding their near-term potential to meet NASA requirements. Candidates included Ka-band and V-band geostationary orbit and non-geostationary orbit satellite relay services and direct downlink ("LEO teleport") services. End-to-end systems concepts were examined and characterized in terms of alternative link layer architectures. Alternatives included a Direct Link, a Relay Link, a Hybrid Link, and a Dual Mode Link. The direct link assessment examined sample ground terminal placements and antenna angle issues. The SATCOM-based alternatives examined existing or pr

Download or read book Duplex Direct Data Distribution System written by and published by . This book was released on 2001 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Technology 2001 written by and published by DIANE Publishing. This book was released on with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2004 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dictionary of Acronyms and Technical Abbreviations written by Jakob Vlietstra and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Dictionary covers information and communication technology (ICT), including hardware and software; information networks, including the Internet and the World Wide Web; automatic control; and ICT-related computer-aided fields. The Dictionary also lists abbreviated names of relevant organizations, conferences, symposia and workshops. This reference is important for all practitioners and users in the areas mentioned above, and those who consult or write technical material. This Second Edition contains 10,000 new entries, for a total of 33,000.

Download or read book International dictionary of abbreviations and acronyms of electronics electrical engineering computer technology and information processing written by Peter Wennrich and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-05-20 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: No detailed description available for "International dictionary of abbreviations and acronyms of electronics, electrical engineering, computer technology, and information processing".

Download or read book StarBriefs 2001 written by and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 805 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compilation probably looks like one of the craziest things a human being could spend his or her time on. Yet nobody would wonder at someone taking a short walk every day - after twenty five years that person would have covered a surprisingly long distance. This is exactly the story behind this list, which appeared first as a few pages within the directory StarGuides (or whatever name it had at that time) and as a distinct sister publication since 1990. The idea behind this dictionary is to offer astronomers and related space scientists practical assistance in decoding the numerous abbreviations, acronyms, contractions and symbols which they might encounter in all aspects of the vast range of their professional activities, including traveling. Perhaps it is a bit paradoxical, but if scientists quickly grasp the meaning of an acronym solely in their own specific discipline, they will probably encounter more difficulties when dealing with adjacent fields. It is for this purpose that this dictionary might be most often used. Scientists might also refer to this compilation in order to avoid identifying a project by an acronym which already has too many meanings or confused definitions.

Download or read book StarBriefs Plus written by Andre Heck and published by Springer Science & Business Media. This book was released on 2004-03-31 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt: With about 200,000 entries, StarBriefs Plus represents the most comprehensive and accurately validated collection of abbreviations, acronyms, contractions and symbols within astronomy, related space sciences and other related fields. As such, this invaluable reference source (and its companion volume, StarGuides Plus) should be on the reference shelf of every library, organization or individual with any interest in these areas. Besides astronomy and associated space sciences, related fields such as aeronautics, aeronomy, astronautics, atmospheric sciences, chemistry, communications, computer sciences, data processing, education, electronics, engineering, energetics, environment, geodesy, geophysics, information handling, management, mathematics, meteorology, optics, physics, remote sensing, and so on, are also covered when justified. Terms in common use and/or of general interest have also been included where appropriate.

Download or read book DATAMATION written by Information Access Company and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Force Manual written by United States. Department of the Air Force and published by . This book was released on 1968 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Data Distribution From Low Earth Orbit written by and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Building Broadband Networks written by Marlyn Kemper Littman and published by CRC Press. This book was released on 2002-06-03 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical networks, undersea networks, GSM, UMTS The recent explosion in broadband communications technologies has opened a new world of fast, flexible services and applications. To successfully implement these services, however, requires a solid understanding of the concepts and capabilities of broadband technologies and networks. Building Br

Download or read book Datamation written by and published by . This book was released on 1981 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Network Management and Security written by International Engineering Consortium and published by Intl. Engineering Consortiu. This book was released on 2006 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough, detailed look into the world of the telecommunications, the internet, and information industries and their relation to networks and security, global specialists have come together in this volume to reveal their ideas on related topics. This reference includes notable discussions on the design of telecommunications networks, information management, network inventory, security policy and quality, and internet tomography and statistics.

Download or read book Annual Review of Broadband Communications written by International Engineering Consortium and published by Intl. Engineering Consortiu. This book was released on 2005 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Communications written by International Engineering Consortium and published by Intl. Engineering Consortiu. This book was released on 2006 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containing essays from leading experts in the industry that discuss academic theories and practical applications of wireless communications, this book focuses on the latest wireless technologies and advancements. A diverse volume, it seeks to shed light on such topics as business strategies and current trends while combining the perspectives of many specialists across the nation.

Download or read book Public Works written by and published by . This book was released on 1920 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: