Proceedings of the Advanced Communications Technology Satellite (ACTS) Conference 2000
Author: NASA Glenn Research Center
Publisher:
Published: 2000
Total Pages: 354
ISBN-13:
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Author: NASA Glenn Research Center
Publisher:
Published: 2000
Total Pages: 354
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 2000
Total Pages: 370
ISBN-13:
DOWNLOAD EBOOKAuthor: Donald H. Martin
Publisher:
Published: 2007
Total Pages: 810
ISBN-13:
DOWNLOAD EBOOKCommunication Satellites, Fifth Edition, chronicles the worldwide development of communication satellites over a period of more than four decades. Descriptive text and tabular data are presented for experimental and operational satellites of communications and broadcasting systems of individual nations and international organizations. Descriptions are enhanced by drawings of satellites, communication subsystem block diagrams, and coverage maps. The book includes extensive references and a supplemental bibliography.
Author: Richard C. Reinhart
Publisher:
Published: 2000
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKThe fixed ground stations used for experiments by government, academic, and commercial entities used reflector-based offset-fed antenna systems with antennas ranging in size from 0.35 to 3.4 m in diameter. Gateway Earth stations included two systems referred to as the NASA Ground Station (NGS) and the Link Evaluation Terminal (LET).
Author: Faramaz Davarian
Publisher:
Published: 1990
Total Pages: 252
ISBN-13:
DOWNLOAD EBOOKAuthor: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Published: 2018-07-23
Total Pages: 144
ISBN-13: 9781723429873
DOWNLOAD EBOOKResults of research on potential science applications of the NASA Advanced Communications Technology Satellite (ACTS) are presented. Discussed here are: (1) general research on communications related issues; (2) a survey of science-related activities and programs in the local area; (3) interviews of selected scientists and associated telecommunications support personnel whose projects have communications requirements; (4) analysis of linkages between ACTS functionality and science user communications activities and modes of operation; and (5) an analysis of survey results and the projection of conclusions to a national scale. Meyer, Thomas R. Unspecified Center ACTS; RESEARCH; SPACECRAFT COMMUNICATION; EDUCATION; FIBER OPTICS; OPTICAL DISKS; SCIENTISTS; SURVEYS...
Author: United States. National Aeronautics and Space Administration
Publisher:
Published: 1988*
Total Pages: 12
ISBN-13:
DOWNLOAD EBOOKAuthor: Teresa M. Braun
Publisher: John Wiley & Sons
Published: 2012-09-04
Total Pages: 400
ISBN-13: 0470540842
DOWNLOAD EBOOKThis 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.