1. Fourier coefficients
(periodogram)

2. N=1512

3. Autocorrelation Method
Autocovariance
Autocorrelation
L is the lags
N is total # of lags
One-sided power spectral density function

7. Blackman -Tukey spectrum (‘spa’ function in Matlab)

8. m/s
8 measurements/sec
seconds

9. Hz
Power Spectral Density
FFT
Power Spectral Density Hz
Periodogram

10. Autoregressive Yule-Walker
FFT
Power Spectral Density Hz
Power Spectral Density Hz
Autoregressive Yule-Walker
Autoregressive Burg

11. Autoregressive Yule-Walker
FFT
Power Spectral Density
Periodogram
Autoregressive Burg
Autoregressive Yule-Walker Hz

12. Calculation and plot by J.F. Paniagua