The long term stability of lidar calibrations

Michael Courtney, Nicolai Gayle Nygaard

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Abstract

Wind lidars are now used extensively for wind resource measurements. One of the requirements for the data to be accepted in support of project financing (so-called ‘banka-bility’) is to demonstrate the long-term stability of lidar cali-brations. Calibration results for six Leosphere WindCube li-dars are used examine this stability. Calibration results be-fore and after periods of field service are examined. No evi-dence of systematic drift is observed but some significant statistical variation is seen. We believe that much of the cal-ibration variation is due to differing environmental parame-ters pertaining in the different calibration periods. This is supported by sliding-window analyses of one lidar at one location where the same order of variation is observed as between pre-service and post-service calibrations.
Original languageEnglish
PublisherDTU Wind Energy
Number of pages37
ISBN (Electronic)978-87-92896-50-6
Publication statusPublished - 2014
SeriesDTU Wind Energy E
Number0033

Bibliographical note

The original version of this report (July 2013) has been revised with the addition of pre and post calibration results from a second campaign and some extra analysis concerning the previously reported erratic behaviour of the sensing height error. This second and final version is dated January 2014.

Keywords

  • DTU Wind Energy E-0033
  • DTU Wind Energy E-33

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