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Re: Re: 2D FT of f(r): Fast Hankel Transforms

  • To: mathgroup at
  • Subject: [mg64209] Re: [mg64180] Re: 2D FT of f(r): Fast Hankel Transforms
  • From: "David Annetts" <davidannetts at>
  • Date: Mon, 6 Feb 2006 02:49:08 -0500 (EST)
  • Sender: owner-wri-mathgroup at

Hi Hyper 

> > You can implement them as a convolution with a digital 
> filter.  Google 
> > for various papers so you can derive coefficients, but one I'd 
> > recommend is JOHANSEN, HK, AND SORENSEN, K. Fast Hankel 
> transforms in 
> > Geophysical Prospecting from a "fair while ago".
> I'll certainly look into it, thank you.  The choice of 
> journal is intriguing...what are the applications of FHTs to 
> Geophysics?

They enter in electromagnetic prospecting in fields of electric dipoles.  I
believe they are also used in magnetic & gravimetric prospecting.



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