A Model for C2n (optical Turbulence) Profiles Using Radiosonde Data PDF Download

Author: Edmond M. Dewan
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 56

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42

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Book Description

Author: Edmond M. Dewan
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 42

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Book Description

Author: Nathan Blaunstein
Publisher: CRC Press
ISBN: 9781420090451
Category : Technology & Engineering
Languages : en
Pages : 280

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Book Description
Exploring the practical aspects of atmospheric optical communication and light detection and ranging (LIDAR), Applied Aspects of Optical Communication and LIDAR details the role of atmospheric structures in propagation phenomena that influence the transmission of optical signals through perturbed atmospheric communication channels. It examines numerous situations in over-the-terrain atmospheric communication channels, including the effects of natural phenomena and the corresponding features (turbulences and hydrometeors) on optical ray propagation. Bridging the gap between the parameters of optical communication links and signal information data streams, this concise reference addresses line-of-sight (LOS) as well as obstructive non-line-of-sight (NLOS) propagation conditions. It also: Details the main characteristics of optical communication channels Introduces the quasi-regular gaseous atmosphere Describes numerous situations in the atmospheric communication channel Explains the main characteristics of optical communication channels Complete with parameters for information data streams, the text also provides time-saving suggestions for determining which optical devices will work best for minimizing the deleterious effects of natural atmospheric phenomena. Whether you’re a researcher, an engineer, or student—this book provides you with the practical understanding required to use LIDAR to investigate all forms of atmospheric phenomena and to learn how to accurately predict primary parameters of atmospheric optical channels.

Author: Hemani Kaushal
Publisher: Springer
ISBN: 8132236912
Category : Technology & Engineering
Languages : en
Pages : 209

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This book provides an in-depth understanding of free space optical (FSO) communication with a particular emphasis on optical beam propagation through atmospheric turbulence. The book is structured in such a way that it provides a basic framework for the beginners and also gives a concise description from a designer’s perspective. The book provides an exposure to FSO technology, fundamental limitations, design methodologies, system trade-offs, acquisition, tracking and pointing (ATP) techniques and link-feasibility analysis. The contents of this book will be of interest to professionals and researchers alike. The book may also be used as a textbook for engineering coursework and professional training.

Author: Elena Masciadri
Publisher: World Scientific
ISBN: 1848164858
Category : Science
Languages : en
Pages : 415

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This book collects most of the talks and poster presentations presented at the "Optical Turbulence ? Astronomy meets Meteorology" international conference held on 15?18 September, 2008 at Nymphes Bay, Alghero, Sardinia, Italy. The meeting aimed to deal with one of the major causes of wavefront perturbations limiting the astronomical high-angular-resolution observations from the ground. The uniqueness of this meeting has been the effort to attack this topic in a synergic and multidisciplinary approach promoting constructive discussions between the actors of this science ? the astronomers, meteorologists, physicists of the atmosphere and the experts in adaptive optics and interferometry techniques whose main goal is to correct, in real-time, the wavefront perturbations induced by atmospheric turbulence to restore at the telescope foci the best available image quality.

Author: Elena Masciadri
Publisher: World Scientific
ISBN: 1908978171
Category : Science
Languages : en
Pages : 416

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Book Description
This book collects most of the talks and poster presentations presented at the "Optical Turbulence — Astronomy meets Meteorology" international conference held on 15–18 September, 2008 at Nymphes Bay, Alghero, Sardinia, Italy. The meeting aimed to deal with one of the major causes of wavefront perturbations limiting the astronomical high-angular-resolution observations from the ground. The uniqueness of this meeting has been the effort to attack this topic in a synergic and multidisciplinary approach promoting constructive discussions between the actors of this science — the astronomers, meteorologists, physicists of the atmosphere and the experts in adaptive optics and interferometry techniques whose main goal is to correct, in real-time, the wavefront perturbations induced by atmospheric turbulence to restore at the telescope foci the best available image quality. Contents: Optical Turbulence in High Angular Resolution Techniques in Astronomy (J M Beckers)Optical Turbulence Profiles at CTIO from a 12-Element Lunar Scintillometer (P Hickson et al.)High Resolution SLODAR Measurements on Mauna Kea (T Butterley et al.)How We Can Understand the Antarctic Atmospheric? (J W V Storey et al.)The Paranal Surface Layar (J Melnick et al.)Introduction to Data Assimilation in Meteorology (P Brousseau … L Auger)The Mauna Kea Weather Center: A Case for Custom Seeing Forecasts (T Cherubini et al.)Dealing with Turbulence: MCAO Experience and Beyond (R Ragazzoni et al.)Future-Look Science Operations for the LBT (R F Green)Surface Layer SLODAR (J Osborn et al.)and other papers Readership: Advanced undergraduates and graduate students, and physicists working in the field of astronomy. Keywords:Astronomy;Optical Turbulence;Atmospheric Models;GCM and Mesoscale Models;Monte Marlo Models

Author: Edmond M. Dewan
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 76

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This report is a tutorial on the effects of atmospheric turbulence upon systems which rely upon the propagation of LASER beams. In addition to providing a simplified presentation of turbulence theory and optical effects, it describes the state of the art of the new technique of radiosonde estimation of index of refraction fluctuations. Suggestions are given for future research which will help to answer current Air Force needs. The feasibility of some laser systems will depend upon the value of r0, the coherence length (which is related to “C2n” which in turn is related to the degree of turbulence). At present, the statistics of “r0” are inadequate.

Author: Pierre Bely
Publisher: Springer Science & Business Media
ISBN: 0387226060
Category : Science
Languages : en
Pages : 508

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Book Description
There is no dearth of books on telescope optics and, indeed, optics is clearly a keyelementinthedesignandconstructionoftelescopes.Butitisbynomeans the only important element. As telescopes become larger and more costly, other aspects such as structures, pointing, wavefront control, enclosures, and project management become just as critical. Although most of the technical knowledge required for all these ?elds is available in various specialized books, journal articles, and technical reports, they are not necessarily written with application to telescopes in mind. This bookisa?rstattemptatassemblinginasingletextthebasicastronomicaland engineering principles used in the design and construction of large telescopes. Itsaimistobroadlycoverallmajoraspectsofthe?eld,fromthefundamentals ofastronomicalobservationto optics, controlsystems,structural,mechanical, andthermalengineering,aswellasspecializedtopicssuchassiteselectionand program management. This subject is so vast that an in-depth treatment is obviously imprac- cal. Our intent is therefore only to provide a comprehensive introduction to the essential aspects of telescope design and construction. This book will not replace specialized scienti?c and technical texts. But we hope that it will be useful for astronomers, managers, and systems engineers who seek a basic understanding of the underlying principles of telescope making, and for s- cialists who wish to acquaint themselves with the fundamental requirements and approaches of their colleagues in other disciplines.

Author: Brett W. Wisdom
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 204

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