Simple Correlation Effects in Surface Scatter PDF Download
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Author: Franz B. Tutuer
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 16
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Book Description
Author: Franz B. Tutuer
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 16
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Book Description
Author: Franz B. Tuteur
Publisher:
ISBN:
Category : Doppler Effect
Languages : en
Pages : 21
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Book Description
This report contains some simple results concerning the correlation time or distance of scattered received signals when the source is a single-frequency tone. Results are given for: the correlation distance between two receivers in a spatial array; the correlation distance in a situation where the source and receiver move together relative to a stationary rough surface; the correlation time at a receiver after several scattering bounces. In all cases it is found that the correlation times or distances are simple function of the surface correlation time and the Rayleigh parameter.
Author: Zu-Han Gu
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
The first theoretical studies of angular correlations in the intensity of light scattered from randomly rough metal surfaces, that go beyond the factorization approximation, have been carried out. As a consequence, in addition to the memory and the time-reversed memory effects studied by earlier authors, known as the short-range C(1) correlations, the long-range C(2) correlations and the infinite-range C(3) correlations have been determined. The latter two correlation functions had been studied earlier in the scattering of light from volume disordered systems, but had not yet been studied in rough surface scattering. In addition, a new correlation function, called C(10), of the same order of magnitude as C(1) has been found, as well as another new correlation function, called C(1.5), that, along with C(2), displays peaks associated with the roughness-induced excitation of the surface electromagnetic waves supported by the vacuum-metal interface. The invalidity of the factorization approximation for weakly rough random surfaces has also been established in another set of calculations. Experimental studies of the memory and time-reversed memory effects have been carried out, as have studies of the effects of localized defects on angular correlations in the intensity of light scattered from random surfaces.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 488
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Valentine Korah
Publisher:
ISBN:
Category : Antitrust law
Languages : en
Pages : 2354
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Author: Petr Carsky
Publisher: CRC Press
ISBN: 1439839115
Category : Science
Languages : en
Pages : 311
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Book Description
Since the turn of the 21st century, the field of electron molecule collisions has undergone a renaissance. The importance of such collisions in applications from radiation chemistry to astrochemistry has flowered, and their role in industrial processes such as plasma technology and lighting are vital to the advancement of next generation devices. F
Author: Technology Reports Centre (Great Britain)
Publisher:
ISBN:
Category :
Languages : en
Pages : 602
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Author: R. J. Papa
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Book Description
There are a number of approaches to the calculation of the electromagnetic scattering from rough surfaces. These techniques are important in the determination of the effects of the real environment on radar and communications systems. The models contain descriptions of the surface in terms of the statistical distribution of the heights and their degree of correlation. These features are then related to a normalized radar cross section for the terrain, sigma deg, through an electromagnetic analysis. In this report we are concerned with questions involving the application of physical optics principles to the analysis. This is important since this approach is used extensively both as a complete solution and as part of composite models. Secondly, we discussed several areas where the statistics and correlation have important roles in determining the scattering from a random rough surface. This is significant in that the usual assumption of a Gaussian distribution of heights with Gaussian correlation may not apply to all types surfaces. Power spectra results suggest that other forms would be more appropriate for some cases. In the beginning of this report, we examine statistical descriptors of a surface and establish the relationship between them and the conditions for applying a physical optics model to the scattering from that surface. We then examine the sensitivity of the distribution of scattered power to changes in the form of the surface height statistics and correlation function. Specifically, we examine the effect of three different correlation functions on the normalized bistatic cross section of a rough surface.
Author: Leung Tsang
Publisher: John Wiley & Sons
ISBN: 0471463787
Category : Technology & Engineering
Languages : en
Pages : 732
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Book Description
A timely and authoritative guide to the state of the art of wave scattering Scattering of Electromagnetic Waves offers in three volumes a complete and up-to-date treatment of wave scattering by random discrete scatterers and rough surfaces. Written by leading scientists who have made important contributions to wave scattering over three decades, this new work explains the principles, methods, and applications of this rapidly expanding, interdisciplinary field. It covers both introductory and advanced material and provides students and researchers in remote sensing as well as imaging, optics, and electromagnetic theory with a one-stop reference to a wealth of current research results. Plus, Scattering of Electromagnetic Waves contains detailed discussions of both analytical and numerical methods, including cutting-edge techniques for the recovery of earth/land parametric information. The three volumes are entitled respectively Theories and Applications, Numerical Simulation, and Advanced Topics. In the second volume, Numerical Simulations, Leung Tsang (University of Washington) Jin Au Kong (MIT), Kung-Hau Ding (Air Force Research Lab), and Chi On Ao (MIT) cover: * Layered media simulations * Rough surface and volume scattering simulations * Dense media models and simulations * Electromagnetic scattering by discrete scatterers and a buried object * Scattering by vertical cylinders above a surface * Electromagnetic waves scattering by vegetation * Computational methods and programs used for performing various simulations
Author: Winfried Schülke
Publisher: Oxford University Press, USA
ISBN: 0198510179
Category : Science
Languages : en
Pages : 606
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Book Description
This work offers the first comprehensive review of experimental methods, theory, and successful applications of synchrotron radiation based on inelastic X-ray scattering spectroscopy, which enables the investigation of electron dynamics in condensed matter (correlated motion and excitation).
