A Guide on Spectral Methods Applied to Discrete Data in One Dimension

Figure 16

Simple Lomb-Scargle periodogram. The open symbols in panel (a) display the input signal. The solid line shows the reconstruction out of the spectrum. Panel (b) focuses on the periodogram. Here, the solid line corresponds to the spectral amplitude and the black points indicate the results of a DFT, as if there was no gap in the data. The dashed line represents the false alarm probability . Note the value of 1 is located at the bottom, whereas smaller values are displayed above.

(a) Input data and signal reconstruction

(b) Periodogram