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A method for the measurement and the statistical analysis of atmospheric turbulenceThe instantaneous values of output voltages representing the wind velocity vector and the temperature at different elevations of the 250-foot meteorological tower located at NASA Wallops Flight Center are provided with the three dimensional split-film TSI Model 1080 anemometer system. The output voltages are sampled at a rate of one every 5 milliseconds, digitized and stored on digital magnetic tapes for a time period of approximately 40 minutes, with the use of a specially designed data acqusition system. A new calibration procedure permits the conversion of the digital voltages to the respective values of the temperature and the velocity components in a Cartesian coordinate system connected with the TSI probe with considerable accuracy. Power, cross, coincidence and quadrature spectra of the wind components and the temperature are obtained with the use of the fast Fourier transform. The cosine taper data window and ensemble and frequency smoothing techniques are used to provide smooth estimates of the spectral functions.
Document ID
19740026682
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Tieleman, H. W. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Tavoularis, S. C. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1974
Subject Category
Geophysics
Report/Patent Number
NASA-CR-62088
VPI-E-74-26
Accession Number
74N34795
Funding Number(s)
CONTRACT_GRANT: NGL-47-004-67
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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