In Frequency Analysis, We usually adopt two methods
1) Annual Maximum Series- a maximum value from annual series data is chosen for analysis.
2) Peak Over Threshold is the other method
I wanted to know, what are the various methods to select a threshold value in Peak over Threshold method.
Hi!
We use following steps in spectral analisys for our tasks:
1. Median filtering for background.
2. Delete spectr background from spectr.
3. At this step we have flat spectr without any background. If source spectr doesn't have any waves then step 1 and 2 can be skip.
4. Calculate Standart Deviation (StDev) for the spectr. It's better to calculate at the region without analized peak. Usually you know peak position (from the history or knoledges about your spectr).
5. Calculate threshold level as K*StDev. Usually the fiest value for K is 3. Then you can decrease or increase this coefficient during experiments. So, yoy can tune sensitivy. But noise influence will be chanfed at the same time.
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