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How can I get a trustful FFT spectrum from an unevenly spaced time

I didn't had a look on your data, but from what is told, I'm with altenbach: I don't think that FFT is the golden tool for you.

Uneven datapoints ..  my fist idea was a sine fit , or more general: create a function with a sine a linear part, slice your data into parts with about 2 or 3 expected periodes, feed them into a LM-fit , ....

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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