** Next:** Transformation Jacobians
** Up:** Sources of inaccuracy
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A more subtle source of error is related to the implementation of
the modeling operator and its adjoint. In brief, conversion from the data
space to the image space involves a change of coordinates from temporal
frequency () to depth wavenumber (*k*_{z}). A correct implementation of this
transformation requires weighting by the transformation Jacobian.
Figures 10 and 11 show the amplitude responses
of modeling followed by migration without the Jacobian.
Although the angle-gathers are kinematically correct (flat), the
amplitude responses are not. More details on the Jacobian weighting follow
in the next section.

** Next:** Transformation Jacobians
** Up:** Sources of inaccuracy
** Previous:** RTT implementation
Stanford Exploration Project

4/30/2001