Turbulence data for the International Turbulence Comparison Experiment (ITCE) held at Conargo, N.S.W. (35" 18' S.-145"lO' E.) during October, 1976 are analysed.The standard deviation (s/2)1/2 and covariance w's' measured by a number of instruments and instrument arrays have been compared& assess their field performance and calibration accuracy. Satisfactory agreement, i.e. typically 5% for (s")~/' (except in humidity) and of the order of 20% for n, was achieved, but only after consideration of:(1) Instrumental response at high frequencies.(2) Flow distortion induced by instruments and supporting structures.(3) Spatial separation of instruments used for covariance measurements.(4) Statistical errors associated with single point measurements over a finite averaging time, and with lateral separation of two sensor arrays being compared.
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