private static void CalculateSpectra(SiteData data, int window, Action <double> progress)
        {
            var cmps = data.GetAllData();

            for (int i = 0; i < cmps.Count; i++)
            {
                var sp = PowerSpectraCalculation.Run(cmps[i].Ts, window, p => progress((i * 100.0 + p) / cmps.Count));
                Application.Current.Dispatcher.Invoke(() => cmps[i].Spectra = sp);
            }
        }