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Millimeter-Wave Propagation and Remote Sensing of the Atmosphere

1983
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Release : 1983
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Book Synopsis Millimeter-Wave Propagation and Remote Sensing of the Atmosphere by : E. E. Altshuler

Download or read book Millimeter-Wave Propagation and Remote Sensing of the Atmosphere written by E. E. Altshuler. This book was released on 1983. Available in PDF, EPUB and Kindle. Book excerpt: The propagation characteristics in the millimeter-wave region of the spectrum are of particular interest because the waves have a strong interaction with lower atmospheric gases and particulates. The effects of this interaction are twofold: on the other hand, atmospheric absorption, scattering and refraction limit the performance of millimeter-wave systems; on the other hand, this interaction allows the propagated wave to be used as a diagnostic tool to probe lower atmospheric structure. The principal applications of millimeter waves have been in the areas of communications, radar, and remote sensing. The availability of large bandwidths makes this region of the spectrum particularly attractive for high data rate communications. Because the angular resolution of an aperture is inversely proportional to wavelength, higher resolution antennas are achievable at millimeter waves than at longer wavelengths.

Microwave Propagation and Remote Sensing

2017-12-19 Science
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Release : 2017-12-19
Genre : Science
Kind : eBook
Book Rating : 316/5 ( reviews)

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Book Synopsis Microwave Propagation and Remote Sensing by : Pranab Kumar Karmakar

Download or read book Microwave Propagation and Remote Sensing written by Pranab Kumar Karmakar. This book was released on 2017-12-19. Available in PDF, EPUB and Kindle. Book excerpt: Because prevailing atmospheric/troposcopic conditions greatly influence radio wave propagation above 10 GHz, the unguided propagation of microwaves in the neutral atmosphere can directly impact many vital applications in science and engineering. These include transmission of intelligence, and radar and radiometric applications used to probe the atmosphere, among others. Where most books address either one or the other, Microwave Propagation and Remote Sensing: Atmospheric Influences with Models and Applications melds coverage of these two subjects to help readers develop solutions to the problems they present. This reference offers a brief, elementary account of microwave propagation through the atmosphere and discusses radiometric applications in the microwave band used to characterize and model atmospheric constituents, which is also known as remote sensing. Summarizing the latest research results in the field, as well as radiometric models and measurement methods, this book covers topics including: Free space propagation Reflection, interference, polarization, and other key aspects of electromagnetic wave propagation Radio refraction and its effects on propagation delay Methodology of estimating water vapor attenuation using radiosonde data Knowledge of rain structures and use of climatological patterns to estimate/measure attenuation of rain, snow, fog, and other prevalent atmospheric particles and human-made substances Dual/multifrequency methodology to deal with the influence of clouds on radiometric attenuation Deployment of microwaves to ascertain various tropospheric conditions Composition and characteristics of the troposphere, to help readers fully understand microwave propagation Derived parameters of water, free space propagation, and conditions and variable constituents such as water vapor and vapor pressure, density, and ray bending

Microwave and Millimeter-wave Remote Sensing for Security Applications

2012 Technology & Engineering
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Release : 2012
Genre : Technology & Engineering
Kind : eBook
Book Rating : 723/5 ( reviews)

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Book Synopsis Microwave and Millimeter-wave Remote Sensing for Security Applications by : Jeffrey A. Nanzer

Download or read book Microwave and Millimeter-wave Remote Sensing for Security Applications written by Jeffrey A. Nanzer. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: Microwave and millimeter-wave remote sensing techniques are fast becoming a necessity in many aspects of security as detection and classification of objects or intruders becomes more difficult. This groundbreaking resource offers you expert guidance in this burgeoning area. It provides you with a thorough treatment of the principles of microwave and millimeter-wave remote sensing for security applications, as well as practical coverage of the design of radiometer, radar, and imaging systems. You learn how to design active and passive sensors for intruder detection, concealed object detection, and human activity classification. This detailed book presents the fundamental concepts practitioners need to understand, including electromagnetic wave propagation in free space and in media, antenna theory, and the principles of receiver design. You find in-depth discussions on the interactions of electromagnetic waves with human tissues, the atmosphere and various building and clothing materials. This timely volume explores recently developed detection techniques, such as micro-Doppler radar signatures and correlation radiometry. The book is supported with over 200 illustrations and 1,135 equations.

Infrared and Millimeter Waves V9

1983-01-01 Technology & Engineering
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Release : 1983-01-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 992/5 ( reviews)

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Book Synopsis Infrared and Millimeter Waves V9 by : Kenneth J. Button

Download or read book Infrared and Millimeter Waves V9 written by Kenneth J. Button. This book was released on 1983-01-01. Available in PDF, EPUB and Kindle. Book excerpt: Infrared and Millimeter Waves, Volume 9: Millimeter Components and Techniques, Part I compiles the work of several authors while focusing on certain aspects of infrared and millimeter waves, such as sources of radiation, instrumentation, and millimeter systems. This volume deals with millimeter components and techniques. Chapter 1 covers millimeter wave communications, and then the succeeding chapter discusses a comparative study of millimeter waves and transmission lines. This book then tackles dielectric waveguide electrooptic devices, as well as millimeter-wave propagation and remote sensing of the atmosphere, which are covered in Chapter 4. The fifth chapter presents the technology of large radio telescopes for millimeter and submillimeter. The next chapter explains a gyrotron study program, and the last chapter discusses multimode analysis of quasi-optical gyrotrons and gyroklystrons. This book will be of great use for researchers or professionals whose work involves infrared and millimeter waves.

Atmospheric Propagation Properties in the 10- to 75-GHz Region

1969 Ionospheric radio wave propagation
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Release : 1969
Genre : Ionospheric radio wave propagation
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Book Synopsis Atmospheric Propagation Properties in the 10- to 75-GHz Region by : Institute for Telecommunication Sciences

Download or read book Atmospheric Propagation Properties in the 10- to 75-GHz Region written by Institute for Telecommunication Sciences. This book was released on 1969. Available in PDF, EPUB and Kindle. Book excerpt: The expansion of telecommunication services into the millimeter wave region prompts a careful look at the limitations of the atmosphere that can give rise to severe signal degradations. In Part I the loss and scatter mechanisms in the 10- to 40- GHz range are examined. It is concluded that there is a need for further theoretical and experimental work on the atmospheric propagation properties in order to support the engineering efforts in designing reliable, useful systems. In Part II the discussions are extended to the 40- to 75 -GHz region where absorption by oxygen dominates. In this region, communication through the atmosphere is not practical; however, the oxygen absorption has a great potential for remote sensing of atmospheric variables, and for special (short-range communication) applications. Unsolved problems of the propagation medium are discussed as a basis for formulating proposals; and the objectives of an experimental program for studying oxygen dispersion and absorption are given.

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