Spectral Coherence Along a Lidar-Anemometer Beam

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The theory of measuring the spectral coherence by means of a lidar anemometer has been outlined. It is based on the assumption that the turbulent velocity field can be considered statistically locally isotropic and on the validity of Taylor’s hypothesis. This implies that the longitudinal coherence cannot be predicted realistically. Special emphasis has been placed on the effect of line average along the beam. One section has been devoted to the effect of spectral aliasing, which may cause severe problems in the interpretation of measured data. This work is considered the theoretical background for the understanding of the coherences calculated on basis of real date.
Original languageEnglish
Place of PublicationRoskilde
PublisherDanmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi
Number of pages21
ISBN (Print)978-87-550-3840-0
Publication statusPublished - 2010
SeriesDenmark. Forskningscenter Risoe. Risoe-R
Number1744(EN)
ISSN0106-2840

    Research areas

  • Wind power meteorology, Wind Energy, Risø-R-1744, Risø-R-1744(EN)
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