• Angevine, W. M., Avery S. K. , Ecklund W. L. , and Carter D. A. , 1993: Fluxes of heat and momentum measured with a boundary-layer wind profiler radar-radio acoustic sounding system. J. Appl. Meteor, 32 , 7381.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Angevine, W. M., Ecklund W. L. , Carter D. A. , Gage K. S. , and Moran K. P. , 1994: Improved radio acoustic sounding techniques. J. Atmos. Oceanic Technol, 11 , 4249.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Angevine, W. M., Bakwin P. S. , and Davis K. J. , 1998: Wind profiler and RASS measurements compared with measurements from a 450-m-tall tower. J. Atmos. Oceanic Technol, 15 , 818825.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Bhatnagar, N., and Peterson A. M. , 1979: Interaction of electromagnetic and acoustic waves in a stochastic atmosphere. IEEE Trans. Antennas Propagat, 27 , 385393.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Briggs, B. H., 1968: On the analysis of moving patterns in geophysics—I. Correlation analysis. J. Atmos. Terr. Phys, 30 , 17771788.

  • Carter, D. A., Gage K. S. , Ecklund W. L. , Angevine W. M. , Johnston P. E. , Riddle A. C. , Wilson J. , and Williams C. R. , 1995: Developments in UHF lower tropospheric wind profiling at NOAA's Aeronomy Laboratory. Radio Sci, 30 , 9771001.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Clifford, S. F., Wang T. I. , and Priestly J. T. , 1978: Spot size of radar return from a Radar-Acoustic Sounding System (RASS) due to atmospheric refractive turbulence. Radio Sci, 13 , 985989.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Doviak, R. J., and Zrnić D. S. , 1993: Doppler Radar and Weather Observations. 2d ed. Academic Press, 562 pp.

  • Doviak, R. J., Lataitis R. C. , and Holloway C. L. , 1996: Cross correlations and cross spectra for spaced antenna wind profilers. Part I: Theoretical analysis. Radio Sci, 31 , 157180.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Fairall, C. W., 1987: A top-down and bottom-up diffusion model of c2 t and c2 q in the entraining convective boundary layer. J. Atmos. Sci, 44 , 10091017.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Frankel, M. S., Chang N. J. F. , and Sanders M. J. , 1977: A high-frequency Radio Acoustic sounder for remote measurement of atmospheric winds and temperature. Bull. Amer. Meteor. Soc, 58 , 928934.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Galati, G., and Pavan G. , 1995: Computer simulation of weather radar signals. Simulation Practice Theor, 3 , 1744.

  • Görsdorf, U., and Lehmann V. , 2000: Enhanced accuracy of RASS-measured temperatures due to an improved range correction. J. Atmos. Oceanic Technol, 17 , 406416.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Holloway, C. L., Doviak R. J. , Cohn S. A. , Lataitis R. J. , and Van Baelen J. S. , 1997: Cross correlations and cross spectra for spaced antenna wind profilers. Part 2: Algorithms to estimate wind and turbulence. Radio Sci, 32 , 967982.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Hopcraft, G., 1997: The turbulent eddy profiler: A digital beam-forming system for clear-air turbulence measurement. Ph.D. thesis, University of Massachusetts—Amherst, 100 pp.

    • Search Google Scholar
    • Export Citation
  • Khanna, S., and Brasseur J. G. , 1998: Three-dimensional buoyancy-and shear-induced local structure of the atmospheric boundary layer. J. Atmos. Sci, 55 , 710743.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Lataitis, R. J., 1992: Signal power of radio acoustic sounding of temperature: The effects of horizontal winds, turbulence, and vertical temperature gradients. Radio Sci, 27 , 369385.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Lataitis, R. J., and Clifford F. C. , 1996: Effect of atmospheric turbulence on the spot size of a radio-acoustic sounding system: A calculation revisited. Radio Sci, 31 , 15311540.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Marshall, J. M., Peterson A. M. , and Barnes A. A. , 1972: Combined radar-acoustic sounding system. Appl. Opt, 11 , 108112.

  • Masuda, Y., 1988: Influence of wind and temperature on the height limit of a Radio Acoustic Sounding System. Radio Sci, 23 , 647654.

  • May, P. T., 1989: The accuracy of RASS temperature measurements. J. Appl. Meteor, 28 , 13291335.

  • May, P. T., Strauch R. G. , Moran K. P. , and Ecklund W. L. , 1990: Temperature sounding by RASS with wind profiler radars: A preliminary study. IEEE Trans. Geosci. Remote Sens, 28 , 1927.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • May, P. T., Adachi T. , Tsuda T. , and Lataitis R. J. , 1996: The spatial structure of RASS echoes. J. Atmos. Oceanic Technol, 13 , 12751290.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Mead, J. B., Hopcraft G. , Frasier S. J. , Pollard B. D. , Cherry C. D. , Schaubert D. H. , and McIntosh R. E. , 1998: A volume-imaging radar wind profiler for atmospheric boundary layer turbulence studies. J. Atmos. Oceanic Technol, 12 , 849859.

    • Search Google Scholar
    • Export Citation
  • Ottersten, H., 1969: Atmospheric structure and radar backscattering in clear air. Radio Sci, 4 , 11791193.

  • Peters, G., and Angevine W. M. , 1996: On the correction of RASS temperature errors due to turbulence. Beitr. Phys. Atmos, 69 , 8196.

  • Pollard, B. D., Frasier S. J. , Khanna S. , Wyngaard J. C. , Thomson D. W. , and McIntosh R. E. , 2000: Local structure of the convective boundary layer from a volume imaging radar. J. Atmos. Sci, 57 , 22812296.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Stull, R. B., 1988: An Introduction to Boundary Layer Meteorology. Kluwer Academic, 666 pp.

  • Tatarskii, V. I., 1971: The effects of the turbulent atmosphere on wave propagation. U.S. Department of Commerce, National Technical Information Service, Springfield, VA, 472 pp. (Translated by Israel Program for Scientific Translations.) [NTIS TT 68-50464.].

    • Search Google Scholar
    • Export Citation
  • Ulaby, F. T., Moore R. K. , and Fung A. K. , 1986: Radar Remote Sensing and Surface Scattering and Emission Theory. Vol. II. Microwave Remote Sensing: Active and Passive, Artech House, 607 pp.

    • Search Google Scholar
    • Export Citation
  • Wyngaard, J. C., and LeMone M. A. , 1980: Behavior of the refractive index structure parameter in the entraining convective boundary layer. J. Atmos. Sci, 35 , 15731585.

    • Search Google Scholar
    • Export Citation
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Radio Acoustic Sounding with a UHF Volume Imaging Radar

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  • 1 Department of Electrical and Computer Engineering, University of Massachusetts—Amherst, Amherst, Massachusetts
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Abstract

An implementation of a radio acoustic sounding system (RASS) using a UHF volume imaging radar is presented. The volume-imaging ability of the radar permits the study the spatial structure of the RASS echo observing both the diffraction pattern on a receiving antenna array and the beamformed images of the RASS intensity. Fine space and time resolution RASS observations of a developing diurnal boundary layer are considered, where observed structures are consistent with theoretical predictions presented in the RASS literature. The RASS amplitude signature is highly variable in space and time, hindering the estimation of complete instantaneous fields of virtual temperature. However, it is possible to obtain spatial statistics. Structure functions computed explicitly show r2/3 behavior typical of isotropic turbulence and vertical profiles of the structure function parameter show a z−4/3 behavior, although they are significantly larger than expected based on surface measurements.

Corresponding author address: Dr. Stephen J. Frasier, Dept. of Electrical and Computer Engineering, University of Massachusetts— Amherst, Amherst, MA 01003-4410. Email: Frasier@ecs.umass.edu

Abstract

An implementation of a radio acoustic sounding system (RASS) using a UHF volume imaging radar is presented. The volume-imaging ability of the radar permits the study the spatial structure of the RASS echo observing both the diffraction pattern on a receiving antenna array and the beamformed images of the RASS intensity. Fine space and time resolution RASS observations of a developing diurnal boundary layer are considered, where observed structures are consistent with theoretical predictions presented in the RASS literature. The RASS amplitude signature is highly variable in space and time, hindering the estimation of complete instantaneous fields of virtual temperature. However, it is possible to obtain spatial statistics. Structure functions computed explicitly show r2/3 behavior typical of isotropic turbulence and vertical profiles of the structure function parameter show a z−4/3 behavior, although they are significantly larger than expected based on surface measurements.

Corresponding author address: Dr. Stephen J. Frasier, Dept. of Electrical and Computer Engineering, University of Massachusetts— Amherst, Amherst, MA 01003-4410. Email: Frasier@ecs.umass.edu

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