<p>The recent "Understanding the Lomb-Scargle Periodogram - 
Jacob T. VanderPlas" that you can find on <a href="https://arxiv.org/pdf/1703.09824.pdf" rel="nofollow noreferrer">This link to arxiv</a> is a very good reference on how to chose the right set of parameters and how to test if your results are reliable.</p>
how to know the fundamental frequency is right detected by fft/lomb-scargle?
<p>I am using two methods,fft and lomb-scargle, to find periods for a timing sequence points.<br/>
However the fundamental frequency changes much even for the same dataset.<br/>
I can get the right result only when I fine tune the sampling rate.&lt;>br/</p>

<p>How to choose the parameters of the two methods to get a consistent fundamental frequency. <br/>
How to know the result is reliable?<br/></p>