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- Title
Averaging Intervals For Spectral Analysis Of Nonstationary Turbulence.
- Authors
Treviño, George; Andreas, Edgar L.
- Abstract
We formulate a method for determining the smallest time interval Δ T over which a turbulence time series can be averaged to decompose it into instantaneous mean and random components. From the random part the method defines the optimal interval (or averaging window) AW over which this part should be averaged to obtain the instantaneous spectrum. Both Δ T and AW vary randomly with time and depend on physical properties of the turbulence. Δ T also depends on the accuracy of the measurements and is thus independent of AW. Interesting features of the method are its real-time capability and the non-equality between AW and Δ T.
- Subjects
ATMOSPHERIC turbulence; ATMOSPHERIC circulation; METEOROLOGY; SPECTRUM analysis; TIME series analysis; MATHEMATICAL statistics
- Publication
Boundary-Layer Meteorology, 2000, Vol 95, Issue 2, p231
- ISSN
0006-8314
- Publication type
Article