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Author : Anonim
Publisher : Unknown
Page : 12 pages
File Size : 49,9 Mb
Release : 1995
Category : Electronic
ISBN : NASA:31769000611957
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 132 pages
File Size : 54,6 Mb
Release : 2018-07-18
Category : Electronic
ISBN : 1723241504
For the next-generation packet switched communications satellite system with onboard processing and spot-beam operation, a reliable onboard fast packet switch is essential to route packets from different uplink beams to different downlink beams. The rapid emergence of point-to-point services such as video distribution, and the large demand for video conference, distributed data processing, and network management makes the multicast function essential to a fast packet switch (FPS). The satellite's inherent broadcast features gives the satellite network an advantage over the terrestrial network in providing multicast services. This report evaluates alternate multicast FPS architectures for onboard baseband switching applications and selects a candidate for subsequent breadboard development. Architecture evaluation and selection will be based on the study performed in phase 1, 'Onboard B-ISDN Fast Packet Switching Architectures', and other switch architectures which have become commercially available as large scale integration (LSI) devices. Shyy, Dong-Jye and Redman, Wayne Unspecified Center COMMUNICATION SATELLITES; LARGE SCALE INTEGRATION; ONBOARD DATA PROCESSING; PACKET SWITCHING; PACKETS (COMMUNICATION); SATELLITE NETWORKS; BREADBOARD MODELS; BROADCASTING; DISTRIBUTED PROCESSING; DOWNLINKING; TELECONFERENCING; UPLINKING; VIDEO DATA...
Author : Glenn E. Peterson
Publisher : AIAA
Page : 622 pages
File Size : 55,7 Mb
Release : 1999
Category : Science
ISBN : 1563473534
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.
Author : Anonim
Publisher : Unknown
Page : 548 pages
File Size : 43,5 Mb
Release : 1995
Category : Aeronautics
ISBN : UVA:X004102523
Author : William D. Ivancic
Publisher : Unknown
Page : 20 pages
File Size : 55,5 Mb
Release : 1992
Category : Artificial satellites in telecommunication
ISBN : UIUC:30112105146986
Author : Anonim
Publisher : Unknown
Page : 548 pages
File Size : 55,5 Mb
Release : 1996
Category : Artificial satellites in telecommunication
ISBN : UCSD:31822021495429
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 49,5 Mb
Release : 1994
Category : Government publications
ISBN : WISC:89117117382
Author : Anonim
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
Page : 548 pages
File Size : 40,9 Mb
Release : 1996
Category : Artificial satellites in telecommunication
ISBN : UCSD:31822021495361
This collection of papers presented during the sessions at the 16th ICSSC includes topics such as: geo-launch vehicles; high-power RF components; satellites in the NII / GII; domestic and regional systems; modulation and coding; authorized PCS systems; military systems; geosynchronous power systems
Author : Anonim
Publisher : Unknown
Page : 662 pages
File Size : 41,9 Mb
Release : 1995
Category : Aeronautics
ISBN : STANFORD:36105016778594
Author : Anonim
Publisher : Unknown
Page : 1044 pages
File Size : 40,7 Mb
Release : 1999
Category : Aeronautics
ISBN : STANFORD:36105021812214
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
Page : 28 pages
File Size : 50,7 Mb
Release : 2018-12-29
Category : Electronic
ISBN : 1792713207
NASA Lewis Research Center is developing an on-board information switching processor for a multichannel communications signal processing satellite. The information switching processor is a flexible, high-throughput, fault tolerant, on-board baseband packet switch used to route user data among user ground terminals. Through industry study contracts and in-house investigations, several packet switching architectures were examined for possible implementation. Three contention-free switching architectures were studied in detail, namely the shared memory approach, the shared bus approach, and the shared memory per beam approach. These three switching architectures are discussed and the advantages and disadvantages of each approach are examined. Shalkhauser, Mary JO and Quintana, Jorge A. Glenn Research Center NASA-TM-106328, E-8087, NAS 1.15:106328 RTOP 506-72-21...
Author : National Aeronautics and Space Administration NASA
Publisher : Unknown
Page : 26 pages
File Size : 49,6 Mb
Release : 2018-10-23
Category : Electronic
ISBN : 1729154999
This study has investigated alternatives for realizing a packet-based network switch for deployment on a communication satellite. The emphasis was on the avoidance of contention problems that can occur due to the simultaneous arrival of an excessive number of packets destined for the same downlink dwell. The study was to look ahead, beyond the current Advanced Communications Technology Satellite (ACTS) capability, to the next generation of satellites. The study has not been limited by currently available technology, but has used university and commercial research efforts as a basis for designs that can be readily constructed and launched within the next five years. Tradeoffs in memory requirement, power requirement, and architecture have been considered as a part of our study. Stehle, Roy and Ogier, Richard G. Unspecified Center NAS3-25934; RTOP 506-72-21...
Author : Donald H. Martin
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
Page : 624 pages
File Size : 49,7 Mb
Release : 2000
Category : Technology & Engineering
ISBN : UOM:39015048858081
"Communication Satellites" chronicles the worldwide development of communication satellites over a period of more than four decades. Includes drawings of satellites, communication subsystem block diagrams, coverage maps, extensive references, and a supplemental bibliography.
Author : American Institute of Aeronautics and Astronautics. Technical Information Service
Publisher : Unknown
Page : 184 pages
File Size : 44,8 Mb
Release : 1996
Category : AIAA paper
ISBN : UOM:39015036267832
Author : Anonim
Publisher : Unknown
Page : 134 pages
File Size : 42,5 Mb
Release : 1993
Category : Electronic
ISBN : NASA:31769000691678