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To do more precise interpolation in the frequency-domain,
Francis Muir derived the following equation:

| |
(6) |

This formula is equivalent to the slow Fourier Transform
(SFT) but is implemented in the frequency domain.
The method provides a fast model of SFT with exact
interpolation.
Muir's interpolator shows a perfect impulse response
without any artifacts in Figure 5.

Stanford Exploration Project

11/16/1997