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Measurements Of Absorption Coefficients Of Water Vapor By Means Of An H 2 O Laser In The Far Infrared
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Book Synopsis Measurements of Absorption Coefficients of Water Vapor by Means of an H 2 O-Laser in the Far Infrared by : H. Kempkens
Download or read book Measurements of Absorption Coefficients of Water Vapor by Means of an H 2 O-Laser in the Far Infrared written by H. Kempkens and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectrophone Measurement of the Water Vapor Continuum at DF Laser Frequencies by : E. K. Damon
Download or read book Spectrophone Measurement of the Water Vapor Continuum at DF Laser Frequencies written by E. K. Damon and published by . This book was released on 1975 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laser-illuminated spectrophone is used to measure the absorption of water vapor at six DF laser lines of interest. These measurements are related to the absorption coefficients of CH4, N2O, HDO, and the known line structure of H2O to infer the extinction coefficient arising from the water vapor continuum in the region 2550-2750/cm.
Book Synopsis Collisional Effects on Molecular Spectra by : Jean-Michel Hartmann
Download or read book Collisional Effects on Molecular Spectra written by Jean-Michel Hartmann and published by Elsevier. This book was released on 2008-08-12 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas phase molecular spectroscopy is a powerful tool for obtaining information on the geometry and internal structure of isolated molecules as well as on the interactions that they undergo. It enables the study of fundamental parameters and processes and is also used for the sounding of gas media through optical techniques. It has been facing always renewed challenges, due to the considerable improvement of experimental techniques and the increasing demand for accuracy and scope of remote sensing applications. In practice, the radiating molecule is usually not isolated but diluted in a mixture at significant total pressure. The collisions among the molecules composing the gas can have a large influence on the spectral shape, affecting all wavelength regions through various mechanisms. These must be taken into account for the correct analysis and prediction of the resulting spectra. This book reviews our current experimental and theoretical knowledge and the practical consequences of collisional effects on molecular spectral shapes in neutral gases. General expressions are first given. They are formal of difficult use for practical calculations often but enable discussion of the approximations leading to simplified situations. The first case examined is that of isolated transitions, with the usual pressure broadening and shifting but also refined effects due to speed dependence and collision-induced velocity changes. Collisional line-mixing, which invalidates the notion of isolated transitions and has spectral consequences when lines are closely spaced, is then discussed within the impact approximation. Regions where the contributions of many distant lines overlap, such as troughs between transitions and band wings, are considered next. For a description of these far wings the finite duration of collisions and concomitant breakdown of the impact approximation must be taken into account. Finally, for long paths or elevated pressures, the dipole or polarizability induced by intermolecular interactions can make significant contributions. Specific models for the description of these collision induced absorption and light scattering processes are presented. The above mentioned topics are reviewed and discussed from a threefold point of view: the various models, the available data, and the consequences for applications including heat transfer, remote sensing and optical sounding. The extensive bibliography and discussion of some remaining problems complete the text. State-of-the-art on the subject A bibliography of nearly 1,000 references Tools for practical calculations Consequences for other scientific fields Numerous illustrative examples Fulfilling a need since there is no equivalent monograph on the subject
Download or read book Physics Briefs written by and published by . This book was released on 1990 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nu-averaged Infrared Absorption Coefficients of Water Vapor by : R. F. Calfee
Download or read book Nu-averaged Infrared Absorption Coefficients of Water Vapor written by R. F. Calfee and published by . This book was released on 1973 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the quantitative absorption coefficients of water vapor in a format suitable for calculation of water vapor absorption spectra characterized by instrumental bandpasses of 1 cm−1 or greater in the 670 to 1450 cm−1 region. The coefficients are derived from individual line parameters of H2O and represent a useful way of reducing line parameter data to a practical volume of information for 1 cm−1 resolution spectra of the troposphere. Transmission spectra for three water vapor concentrations show typical applications of the absorption coefficient tables. The application of the data is restricted to conditions within 10% of 1 atmosphere pressure and a temperature of 296 K if a transmission accuracy of 2% is to be maintained.
Book Synopsis Water Vapor Absorption Coefficients at HF Laser Wavelengths. Part II. Development of the Measurement System and Measurements at Simulated Altitudes to 10 Km by : Robert L. Spellicy
Download or read book Water Vapor Absorption Coefficients at HF Laser Wavelengths. Part II. Development of the Measurement System and Measurements at Simulated Altitudes to 10 Km written by Robert L. Spellicy and published by . This book was released on 1981 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique differential photoacoustic system is described along with water vapor absorption measurements made at HF laser lines. The photoacoustic system is capable of determining absorption coefficients to .005/km. Comparisons of the data with calculated values based on a modified Lorentz profile with an augmented line wing and the latest atmospheric absorption line compilation showed good agreement for all laser lines at high pressures (N700 torr) with some discrepancies at lower pressures. (Author).
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Empirical Infrared Absorption Coefficients of H2o from 300k to 3000k by : C. C. Ferriso
Download or read book Empirical Infrared Absorption Coefficients of H2o from 300k to 3000k written by C. C. Ferriso and published by . This book was released on 1965 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of absorption coefficients for water vapor as functions of temperature has been empirically deduced from existing quantitative absorption and emission spectra between 1 and 22 microns. The basic assumption was made that, for optically thick gases, the curve of growth is given by a statistical model. The absorption coefficients were obtained for each vibration-rotation band by adjusting the band averaged line half widths and line spacings such that the integral of the absorption coefficients was equal to the known integrated intensity of the particular band at a given temperature. The effect of foreign gas broadening and non-resonant water molecule broadening was included. The present results are compared with independent theoretical and experimental results and the agreement is satisfactory. (Author).
Book Synopsis Atmospheric Scattering from a 1.15-Micron Laser Beam and Its Off-axis Detectable Range by : Roger H. Kleen
Download or read book Atmospheric Scattering from a 1.15-Micron Laser Beam and Its Off-axis Detectable Range written by Roger H. Kleen and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The detectability of a laser beam through a fog can be predicted fairly accurately for various detector and collecting optical systems if temperature, relative humidity, and fog extinction coefficient are known. Smoke is much more variable and can not be characterized by only its extinction coefficient. Fog and smoke angular scattering patterns determined experimentally are presented.
Book Synopsis A Two-Line Absorption Instrument for Scramjet Temperature and Water Vapor Concentration Measurement in HYPULSE by :
Download or read book A Two-Line Absorption Instrument for Scramjet Temperature and Water Vapor Concentration Measurement in HYPULSE written by and published by . This book was released on 1998 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Resolution Spectroscopy of Transient Molecules by : Eizi Hirota
Download or read book High-Resolution Spectroscopy of Transient Molecules written by Eizi Hirota and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a great challenge in chemistry to clarify every detail of reaction processes. In older days chemists mixed starting materials in a flask and took the resul tants out of it after a while, leaving all the intermediate steps uncleared as a sort of black box. One had to be content with only changing temperature and pressure to accelerate or decelerate chemical reactions, and there was almost no hope of initiating new reactions. However, a number of new techniques and new methods have been introduced and have provided us with a clue to the examination of the black box of chemical reaction. Flash photolysis, which was invented in the 1950s, is such an example; this method has been combined with high-resolution electronic spectroscopy with photographic recording of the spectra to provide a large amount of precise and detailed data on transient molecules which occur as intermediates during the course of chemical reac tions. In 1960 a fundamentally new light source was devised, i. e. , the laser. When the present author and coworkers started high-resolution spectroscopic stud ies of transient molecules at a new research institute, the Institute for Molecu lar Science in Okazaki in 1975, the time was right to exploit this new light source and its microwave precursor in order to shed light on the black box.
Book Synopsis Journal of the Optical Society of America by : Optical Society of America
Download or read book Journal of the Optical Society of America written by Optical Society of America and published by . This book was released on 1981 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1985 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics Index written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Infrared Spectral Absorptivity Variation of Water Vapor at High Temperatures by : Ronald Ward Keil
Download or read book Investigation of Infrared Spectral Absorptivity Variation of Water Vapor at High Temperatures written by Ronald Ward Keil and published by . This book was released on 1969 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
