CONCLUSIONRadiation pattern and gain measurements on the conformal 6 X 9 slot array indicate that a completely analytic design process is feasible for small slot arrays in waveguide. The measured performance of the conformal array is gratifying, especially for a first trial of a radical design technique.
ACKNOWLEDGMENTThe helpful consultations of R. S. Elliott and L. A. Kurtz are gratefully acknowledged. Appreciation is also expressed to S. W.Lee for his assistance and the timely availability of his referenced report.
REFERENCES[ I ] R. S. Elliott and L. A. Kurtz, "The design of small slot arrays," in
In the bistatic configuration, acoustic echoes from the atmospheric boundary layer are determined by the magnitude of the structure parameters for wind and temperature, CG and C,l respectively. Normally the contribution from C,! is relatively small and so this arrangement offers a remote method for determining CG, and hence the rate of dissipation of turbulent energy, E. A quantitative assessment of this technique is presented. Direct estimates of E and C: have been made using turbulence probes attached to the tethering cable of a large (1300111~) balloon. Sounder-derived values were obtained using two carefully calibrated acoustic arrays. Results obtained in both convective and stable conditions are described and contrasted.
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