Download or read book Statistical Analysis of Low Level Atmospheric Turbulence written by Henry W. Tieleman and published by . This book was released on 1973 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Analysis of Atmospheric Turbulence about a Simulated Block Building written by Sidney L. Steely and published by . This book was released on 1980 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase III Interim Report written by K. R. Monson and published by . This book was released on 1969 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this report describe accomplishments during the first half of the Low-Level Critical Air Turbulence (LO-LOCAT) Phase III program. Data that were obtained during flight over routes near McConnell Air Force Base, Kansas, and Edwards Air Force Base, California, are presented. Also included are time histories of some of the larger magnitude gust velocities recorded over the Peterson Field, Colorado route. Approximately 72 hours of low-level (0-1000 feet) turbulence and associated meteorological data recorded from August 16, 1968, through January 8, 1969, are presented. The turbulence environment is analyzed in terms of gust velocity primary peaks, amplitude samples, rms values, maximum values and derived equivalent gusts. Mathematical expressions for turbulence spectra and scale length statistics, and correlations between atmospheric gust velocities and meteorological and geophysical phenomena are shown. The most predominant characteristics of these data are the increases in rms values, scale lengths, Taylor micro scales and maximum gust values as compared to the LO-LOCAT Phases I and II data. These differences are attributed to the increased speed of the Phase III airplane which is providing a better definition of the longer wavelengths of atmospheric turbulence. This report consists of two volumes. Volume I contains a discussion of data acquisition and quality, along with a preliminary analysis of turbulence and meteorological data.
Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase 3 Volume 1 Part 1 Data Analysis written by and published by . This book was released on 1970 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents procedures, analysis methods, and final results pertaining to the LO-LOCAT Phase 3 program. Approximately 150 hours of low altitude (100 - 1000 feet) turbulence and associated meteorological data were recorded from 16 August 1968 through 30 June 1969. A model of the turbulence environment at low-level is presented in terms of gust velocity primary peaks, level crossings, amplitude samples, rms values, and gust maxima, as well as derived equivalent gusts, turbulence scale lengths, and power spectra. Mathematical expressions for turbulence spectra, scale length, and primary peak statistics are shown. Correlations between atmospheric gust velocities and meteorological and geophysical phenomena are evaluated. It was found that gust velocity magnitude at low altitude is most affected by atmospheric stability and terrain. Gust velocity rms values above 1.5 fps may be approximated by truncated Gaussian distributions. For wavelengths less than 15,000 feet, turbulence spectra are best represented by the von Karman mathematical expressions. The turbulence, sampled for 4-1/2 minute intervals over a distance of approximately 32 miles at absolute altitudes below 1,000 feet, was found to be basically stationary, isotropic, and homogeneous.
Download or read book Statistical Analysis of Atmospheric Turbulence about a Simulated Block Building written by Sidney L. Jr Steely and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interim Analysis of Low Altitude Atmospheric Turbulence Lo Locat Data written by G. W. Jones and published by . This book was released on 1969 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this report described Low-Level Critical Air Turbulence (LO-LOCAT) program accomplishments through 15 September 1967. These accomplishments cover the first year of the flight period. Utilizing four instrumented C-131B aircraft, turbulence and meteorological data were obtained at absolute altitudes below 1,000 feet while flying over specified routes located in California, Colorado, Kansas, and New York. At the one year point, approximately 600 hours of low-level turbulence data had been obtained. Analyses of these data show consistent agreement of gust velocity statistics as obtained from amplitude and peak samples. Strong Gaussian characteristics of the distributions of RMS gusts are revealed. The major meteorological influence on turbulence is found to be atmospheric stability. Also exhibited is the close correlation between experimentally determined spectra and mathematical expressions advanced by Theodore von Karman. (Author).
Download or read book Analysis of Low Altitude Atmospheric Turbulence Data Measured in Flight written by Victor M. Ganzer and published by . This book was released on 1977 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Data Analysis System for the Detection of Lower Level Atmospheric Turbulence with an Acoustic Sounder written by Michael Raymond Wroblewski and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric density fluctuations induce phase perturbations that degrade the spatial coherence of a laser beam propagating through the atmosphere. These degradations spread the laser beam and alter the centroid are found at virtually all levels of the atmosphere. A substantial fraction of the optical turbulence along a vertical path arises from the heat flux between the atmosphere and the Earth's surface. This type of turbulence is typically within the first 100 to 200 meters above the surface. During this thesis research, a high frequency acoustic sounder was developed to analyze this turbulent layer. The primary focus was the development of the command and control software required to coordinate the data collection and reduction. The system was used at two sites and should prove useful in quantifying the effects of optical turbulence within the surface boundary layer on laser and optical system performance. (Author).
Download or read book A Method for the Measurement and the Statistical Analysis of Atmospheric Turbulence written by Stavros Christas Tavoularis and published by . This book was released on 1974 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase III Interim Report Volume 1 Data Acquisition and Analysis written by and published by . This book was released on 1969 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this report describe accomplishments during the first half of the Low-Level Critical Air Turbulence (LO-LOCAT) Phase III program. Data that were obtained during flight over routes near McConnell Air Force Base, Kansas, and Edwards Air Force Base, California, are presented. Also included are time histories of some of the larger magnitude gust velocities recorded over the Peterson Field, Colorado route. Approximately 72 hours of low-level (0-1000 feet) turbulence and associated meteorological data recorded from August 16, 1968, through January 8, 1969, are presented. The turbulence environment is analyzed in terms of gust velocity primary peaks, amplitude samples, rms values, maximum values and derived equivalent gusts. Mathematical expressions for turbulence spectra and scale length statistics, and correlations between atmospheric gust velocities and meteorological and geophysical phenomena are shown. The most predominant characteristics of these data are the increases in rms values, scale lengths, Taylor micro scales and maximum gust values as compared to the LO-LOCAT Phases I and II data. These differences are attributed to the increased speed of the Phase III airplane which is providing a better definition of the longer wavelengths of atmospheric turbulence. This report consists of two volumes. Volume I contains a discussion of data acquisition and quality, along with a preliminary analysis of turbulence and meteorological data.
Download or read book Statistical Analysis of Turbulence Data from the NASA Marshall Space Flight Center Atmospheric Boundary Layer Tower Array Facility written by Walter Frost and published by . This book was released on 1983 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aviation Turbulence written by Robert Sharman and published by Springer. This book was released on 2016-06-27 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anyone who has experienced turbulence in flight knows that it is usually not pleasant, and may wonder why this is so difficult to avoid. The book includes papers by various aviation turbulence researchers and provides background into the nature and causes of atmospheric turbulence that affect aircraft motion, and contains surveys of the latest techniques for remote and in situ sensing and forecasting of the turbulence phenomenon. It provides updates on the state-of-the-art research since earlier studies in the 1960s on clear-air turbulence, explains recent new understanding into turbulence generation by thunderstorms, and summarizes future challenges in turbulence prediction and avoidance.
Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase III Interim Report written by K. R. Monson and published by . This book was released on 1969 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this report describe accomplishments during the first half of the Low-Level Critical Air Turbulence (LO-LOCAT) Phase III program. Data that were obtained during flight over routes near McConnell Air Force Base, Kansas, and Edwards Air Force Base, California, are presented. Also included are time histories of some of the larger magnitude gust velocities recorded over the Peterson Field, Colorado route. Approximately 72 hours of low-level (0-1000 feet) turbulence and associated meteorological data recorded from August 16, 1968, through January 8, 1969, are presented. The turbulence environment is analyzed in terms of gust velocity primary peaks, amplitude samples, rms values, maximum values and derived equivalent gusts. Mathematical expressions for turbulence spectra and scale length statistics, and correlations between atmospheric gust velocities and meteorological and geophysical phenomena are shown. The most predominant characteristics of these data are the increases in rms values, scale lengths, Taylor micro scales and maximum gust values as compared to the LO-LOCAT Phases I and II data. These differences are attributed to the increased speed of the Phase III airplane which is providing a better definition of the longer wavelengths of atmospheric turbulence. This report consists of two volumes. Volume I contains a discussion of data acquisition and quality, along with a preliminary analysis of turbulence and meteorological data.
Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase 3 Volume 2 Part 2 Frequency Data Plots written by and published by . This book was released on 1970 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents procedures, analysis methods, and final results pertaining to the LO-LOCAT Phase III program. Approximately 150 hours of low altitude (100 - 1000 feet) turbulence and associated meteorological data were recorded from 16 August 1968 through 30 June 1969. A model of the turbulence environment at low-level is presented in terms of gust velocity primary peaks, level crossings, amplitude samples, rms values, and gust maxima, as well as derived equivalent gusts, turbulence scale lengths, and power spectra. Mathematical expressions for turbulence spectra, scale length, and primary peak statistics are shown. Correlations between atmospheric gust velocities and meteorological and geophysical phenomena are evaluated. It was found that gust velocity magnitude at low altitude is most affected by atmospheric stability and terrain. Gust velocity rms values above 1.5 fps may be approximated by truncated Gaussian distributions. For wavelengths less than 15,000 feet, turbulence spectra are best represented by the von Karman mathematical expressions. The turbulence, sampled for 4-1/2 minute intervals over a distance of approximately 32 miles at absolute altitudes below 1,000 feet, was found to be basically stationary, isotropic, and homogeneous.
Download or read book Additional Research of Low Altitude Turbulence Data written by Joe D. Gault and published by . This book was released on 1971 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents procedures, analysis methods and results pertaining to a more detailed study of several data samples recorded during the Low Altitude Atmospheric Turbulence Program (LO-LOCAT, Phase III). Wind spectra corrected for airplane motion effects and gust velocity calculated using filtered input parameters substantiated the original results obtained during LO-LOCAT, Phase III. (Author).
Download or read book Low Altitude Atmospheric Turbulence Lo locat Mid term Technical Data Analysis written by J. D. Gault and published by . This book was released on 1967 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
