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time vs longitude FFT [message #56556]

Mon, 29 October 2007 08:23

knielsen73
Messages: 9
Registered: October 2007

Junior Member

Hi,

I have a time vs longitude plot and would like to do a 2-D FFT to get
a frequency vs wavenumber plot. I used the IDL FFT but I am not sure
what the output is...I didn't feel the IDL help was very helpful
there. I found a post from 1998 but there were some non-defined
functions and I wasn't exactly sure what they did.

Does anybody have a good example on how to use 2D FFT in IDL or some
good documentation?

Cheers,
Kim

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