Synthesis method The datasets are synthesised using the well-known technique of 'Gaussian mapping'.
The software draws on the paper by Beyer & Nottebaum (1996), Synthesis of long-term hourly wind speed time series
on the basis of European Wind Atlas data , Solar Energy 54(5), 351-355. The major steps are:
- For a given month, the shape parameter and 24 hourly scale parameters of a Weibull distribution
which yield the closest approximation to the mean-cube windspeed for that month (as specified in the European Wind Atlas) are found.
- This step is repeated for all 12 months.
- The impulse function corresponding to the site-specific spectrum (published in the European Wind Atlas)
is found by spectral factorisation.
- A prototype wind speed series is generated by filtering a Gaussian pseudo-random
sequence through a moving-average filter composed of the coefficients of the impulse function.
- The prototype series is mapped through the cumulative Weibull distribution functions previously
obtained to produce the final output series.
- Statistics for the output series are produced to check for agreement with the European Wind Atlas specification for the site.