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Equation (23) can be simply interpreted
as plane-wave superposition.
To make this clear,
we first dispose of the *rho * filter by means of a definition.

| |
(24) |

Equation (24) will be seen to be more than a definition.
We will see that can be interpreted as the
*plane-wave spectrum* .
Substituting the definition (24)
into both (23) and (14) gives
another transform pair:
| |
(25) |

To confirm that may be interpreted
as the plane-wave spectrum,
we take to be the impulse
function and
substitute it into the top half of (25).
The result is an impulsive plane wave, as expected.

** Next:** Reflection coefficients spherical versus
** Up:** SLANT STACK
** Previous:** Inverse slant stack
Stanford Exploration Project

10/31/1997