Hi,
Does the PPSD class follow the same workflow as that described in the PQLX manual? i.e., is the day long file truncated to the next lowest power of two?
“First, to significantly improve the Fast Fourier Transform (FFT) speed ratio, by reducing the number of operations, the number of samples in the time series, N, is truncated to the next lowest power of two, 217, leaving N=131,072, thereby reducing the series length such that Th=3276.8s. Second, in order to further reduce the variance of the final PSD estimates, each roughly 1-hour time series record is divided into 13 segments, overlapping by 75 percent, where the length of each new time series segment is now, Tr=Th/4=819.2s with N=32,768=215.”