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1D -> 2D Power Spectrum [message #31216]

Wed, 19 June 2002 01:45

jl0477
Messages: 2
Registered: June 2002

Junior Member

Hi All,

Here is my problem, half Physics, half IDL:

I have got a 1D Power Spectrum computed from a profile of a
rough surface.
I would like to extend these results to 2D Power spectrum, assuming
that the surface is isotropic.

Is there an easy way to go from one to the other?

(Without doing an Hankel transform of the 1D autocorrelation
function. I have convergence problems with my own routine and
dicontinuities appear with the function of William Thompson. I think
that is because I use real data and the autocorrelation function I try
to Fourier-Bessel transform do not converge to zero but oscillate
around positive and negative values...)

Ps: Thanks to Bill Thompson for his help for the hankel transf.

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