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There are a total of 30 record(s) matching your query.
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The Extended Parabolic Equation Method and Implication of Results for Atmospheric Millimeter-Wave and Optical Propagation
Author(s): Manning, Robert M.
Abstract: The extended wide-angle parabolic wave equation applied to electromagnetic wave propagation in random media is considered. A general operator equation is derived which gives the statistical moments of an electric field of a ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2005-10-13
Document ID: 20040058094; Report Number: E-14384, NASA/TM-2004-212944
Space communication link propagation data for selected cities within the multiple beam and steerable antenna coverage areas of the advanced communications technology satellite
Author(s): Manning, Robert M.
Abstract: Rain attenuation propagation data for 68 cities within the coverage area of the multiple beam and steerable antennas of the Advanced Communications Technology Satellite (ACTS) are presented. These data provide the necessary ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2005-10-13
Accession Number: 88N23070; Document ID: 19880013686; Report Number: E-4073, NAS 1.15:100861, NASA-TM-100861
A Short Note on the Derivation of the Atmospheric Transfer Function for a Communications Channel and its Connection to Associated Propagation Parameters
Author(s): Manning, Robert M.
Abstract: The systems engineering description of a wideband communications channel is provided which is based upon the fundamental propagation aspects of the problem. In particular, the well known time variant description of a channel ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2005-10-13
Document ID: 20040056139; Report Number: E-14451, NASA/TM-2004-212975
Optimizing the antenna system of a microwave space power station: Implications for the selection of operating power, frequency and antenna size
Author(s): Manning, Robert M.
Abstract: A design for a space power station that is to transmit power to the surface of a planet via high powered microwaves should commence with the optimum design of the transmitting and receiving antenna combination to be ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N30132; Document ID: 19870020699; Report Number: E-3761, NAS 1.15:100184, NASA-TM-100184
Balanced-Load Real-Time Multiprocessor System
Author(s): Rasmussen, Robert D.; Manning, Robert M.; Lewis, Blair F.; Bolotin, Gary S.; Ward, Richard S.
Abstract: Modularity and parallelism provide tolerance to faults and high throughput capacity. System, called MAX, is network of interconnected computers. MAX cluster consists of group of modules - each semiautonomous computer. ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1989
Added to NTRS: 2005-09-30
Accession Number: 89B10349; Document ID: 19890000349; Report Number: NPO-17185
Compilation and Analysis of 20- and 30-GHz Rain Fade Events at the ACTS NASA Ground Station: Statistics and Model Assessment
Author(s): Manning, Robert M.
Abstract: Since the beginning of the operational phase of the NASA Research Center's Advanced Communication Technology Satellite (ACTS), signal-fade measurements have been recorded at the NASA Ground Station located in Cleveland, ...
NASA Center: Glenn Research Center
Publication Year: 1995
Added to NTRS: 2005-08-25
Document ID: 20050169166
A statistical rain attenuation prediction model with application to the advanced communication technology satellite project. Part 2: Theoretical development of a dynamic model and application to rain fade durations and ...
Author(s): Manning, Robert M.
Abstract: A dynamic rain attenuation prediction model is developed for use in obtaining the temporal characteristics, on time scales of minutes or hours, of satellite communication link availability. Analagous to the associated static ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-08-25
Accession Number: 88N11945; Document ID: 19880002563; Report Number: E-3866, NAS 1.15:100242, NASA-TM-100242
A statistical rain attenuation prediction model with application to the advanced communication technology satellite project. 3: A stochastic rain fade control algorithm for satellite link power via non linear Markow ...
Author(s): Manning, Robert M.
Abstract: The dynamic and composite nature of propagation impairments that are incurred on Earth-space communications links at frequencies in and above 30/20 GHz Ka band, i.e., rain attenuation, cloud and/or clear air scintillation, ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N22494; Document ID: 19910013181; Report Number: E-6171, NAS 1.15:100243, NASA-TM-100243
Real-Time In Situ Signal-To-Noise Ratio Estimation for the Assessment of Operational Communications Links
Author(s): Manning, Robert M.
Abstract: The work presented here formulates the rigorous statistical basis for the correct estimation of communication link SNR of a BPSK, QPSK, and for that matter, any M-ary phase-modulated digital signal from what is known about ...
NASA Center: Glenn Research Center
Publication Year: 2002
Added to NTRS: 2005-08-25
Document ID: 20020082947; Report Number: E-13448, NAS 1.15:211703, NASA/TM-2002-211703
Fade Dynamics and its Evolution: The Other Part of the ACTS Rain Prediction Model
Author(s): Manning, Robert M.
Abstract: The inception of the Advanced Communication Technology Satellite (ACTS) Project has required a similarly advanced statistical mathematical modeling formalism to describe the behavior of the 30/20 GHz links emanating to and ...
NASA Center: Glenn Research Center
Publication Year: 1997
Added to NTRS: 2004-11-03
Accession Number: 97N29902; Document ID: 19970034653
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