Reflection energy from a linear reflector comes from an integrant over an aperture often described by the Fresnel zone. Within the Fresnel zone, the diffraction energy constructively builds the reflection energy. Recognition of the amplitude variation within the Fresnel zone will contribute to migration theory. This paper uses diffraction theory to explain the amplitude within the Fresnel zone and the reflector edge effect on amplitude. This recognition of the response near the edge of the reflector is required to when designing a minimum migration aperture.
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