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Equation for Search Resolution

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olichris
olichris's picture
Equation for Search Resolution

Good afternoon everyone, I have the following question, there is a formula to calculate what is the best resolution in the search for the fourier transform, for the number of measurements we have, the time span, and the spacing (sampling frequency) , I am going to show it as it appears in the conference of Matthew Templeton https://aavso.org/time-series-tutorial

in frequency: dv = 1 / N (delta)
in days:  dP = P ^ 2 / N (delta)

 

Where N is the total number of samples (592) and (delta) is the space between samples (1 days)

then it is simply said, 1 / (period of time covered by the data in days). but and if I have 20 points that span 80 years, somehow the number of points has to influence.

I wish someone could give me an example with these parameters:

592 measurements
81 years (29565 days)
sampling frequency 1 day

Thanks in advance

David Benn
David Benn's picture
Search resolution

Hi Oliver

The sub-section "Other DCDFT options: Period and Frequency Range" of the Period Search section in the VStar manual may be of some assistance but feel free to ask more.

David

olichris
olichris's picture
Pag 65

thank you very much i found it

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