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Coherent Doppler Wind Lidars in a Turbulent Atmosphere

2013-09-01 Technology & Engineering
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Release : 2013-09-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 679/5 ( reviews)

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Book Synopsis Coherent Doppler Wind Lidars in a Turbulent Atmosphere by : Viktor Banakh

Download or read book Coherent Doppler Wind Lidars in a Turbulent Atmosphere written by Viktor Banakh . This book was released on 2013-09-01. Available in PDF, EPUB and Kindle. Book excerpt: Radiophysical tools for measuring atmospheric dynamics include sodars, Doppler radars, and Doppler lidars. Among these, coherent Doppler lidars (CDLs) have been considered the best for remote measurement of wind turbulence. This is important not only for understanding the exchange processes in the boundary layer, but also in the applied aspect, such as aviation safety. CDLs significantly extend possibilities of experimental investigation of not only wind turbulence, but also coherent structures such as aircraft wake vortices. The authors of this book conducted field tests of the developed methods of lidar measurements of the wind velocity, atmospheric turbulence parameters, and aircraft wake vortices. This valuable resource, containing over 500 equations based on original results from the authors’ work, gives professionals a comprehensive description of the operating principles of continuous wave and pulsed coherent Doppler lidars. This book studies the possibilities of obtaining information about wind turbulence from data measured by continuous wave and pulsed CDLs. The procedures for estimation are described, as well as algorithms for numerical simulation. Results on the vortex behavior and evolution are then presented.

Relation of Infrared Doppler Lidar to Remote Wind Measurements in the Turbulent Atmosphere

1978
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Release : 1978
Genre :
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Book Synopsis Relation of Infrared Doppler Lidar to Remote Wind Measurements in the Turbulent Atmosphere by :

Download or read book Relation of Infrared Doppler Lidar to Remote Wind Measurements in the Turbulent Atmosphere written by . This book was released on 1978. Available in PDF, EPUB and Kindle. Book excerpt: The performance of a coherent Doppler lidar is affected by the atmosphere. Refractive index inhomogeneities limit the effective aperture of our system to 15.5 cm + or - 4% on the average for a 2.6 km horizontal path 2 m above the surface under daytime conditions. Effective aperture scales as range to the -3/5 power. A differential Doppler technique can measure the wind vector in a single atmospheric volume with three (or mor) closely-spaced beams. This method works even when the distribution of velocities in the volume is wider than the velocity separation from beam angle differences. The structure function for backscatter and wind inhomogeneities scales approximately as r to the 2/3 power between the minimum detectable scale in our experiment and an outer scale of 100 to 500 m, depending on atmospheric condition. (Author).

Lidar in a Turbulent Atmosphere

1987 Science
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Release : 1987
Genre : Science
Kind : eBook
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Book Synopsis Lidar in a Turbulent Atmosphere by : Viktor Arsentʹevich Banakh

Download or read book Lidar in a Turbulent Atmosphere written by Viktor Arsentʹevich Banakh. This book was released on 1987. Available in PDF, EPUB and Kindle. Book excerpt:

Springer Handbook of Atmospheric Measurements

2021-11-09 Science
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Release : 2021-11-09
Genre : Science
Kind : eBook
Book Rating : 710/5 ( reviews)

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Book Synopsis Springer Handbook of Atmospheric Measurements by : Thomas Foken

Download or read book Springer Handbook of Atmospheric Measurements written by Thomas Foken. This book was released on 2021-11-09. Available in PDF, EPUB and Kindle. Book excerpt: This practical handbook provides a clearly structured, concise and comprehensive account of the huge variety of atmospheric and related measurements relevant to meteorologists and for the purpose of weather forecasting and climate research, but also to the practitioner in the wider field of environmental physics and ecology. The Springer Handbook of Atmospheric Measurements is divided into six parts: The first part offers instructive descriptions of the basics of atmospheric measurements and the multitude of their influencing factors, fundamentals of quality control and standardization, as well as equations and tables of atmospheric, water, and soil quantities. The subsequent parts present classical in-situ measurements as well as remote sensing techniques from both ground-based as well as airborn or satellite-based methods. The next part focusses on complex measurements and methods that integrate different techniques to establish more holistic data. Brief discussions of measurements in soils and water, at plants, in urban and rural environments and for renewable energies demonstrate the potential of such applications. The final part provides an overview of atmospheric and ecological networks. Written by distinguished experts from academia and industry, each of the 64 chapters provides in-depth discussions of the available devices with their specifications, aspects of quality control, maintenance as well as their potential for the future. A large number of thoroughly compiled tables of physical quantities, sensors and system characteristics make this handbook a unique, universal and useful reference for the practitioner and absolutely essential for researchers, students, and technicians.

Optimizing Dual-Doppler Lidar Measurements of Surface Layer Coherent Structures with Large-Eddy Simulations

2014-07-10 Science
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Release : 2014-07-10
Genre : Science
Kind : eBook
Book Rating : 97X/5 ( reviews)

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Book Synopsis Optimizing Dual-Doppler Lidar Measurements of Surface Layer Coherent Structures with Large-Eddy Simulations by : Stawiarski, Christina

Download or read book Optimizing Dual-Doppler Lidar Measurements of Surface Layer Coherent Structures with Large-Eddy Simulations written by Stawiarski, Christina. This book was released on 2014-07-10. Available in PDF, EPUB and Kindle. Book excerpt: Coherent structures are patterns in the wind field of the atmospheric boundary layer. The deployment of two scanning Doppler lidars facilitates the measurement of the horizontal wind field, but the inherent averaging processes complicate an interpretation of the results. To assess the suitability of this technique for coherent structure detection large-eddy simulations are used as a basis for virtual measurements, and the effects of the lidar technique on the wind field structure are analyzed.

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