Azimuth Moveout Revisited – Amplitude Preservation and Implementation Efficiency

P072 AZIMUTH MOVEOUT REVISITED – AMPLITUDE PRESERVATION AND IMPLEMENTATION EFFICIENCY Summary 1 We revisit a theoretical formulation of azimuth moveout. A simple sampling criterion in transformed midpoint coordinates is derived for preserving amplitude. We also discuss a deviation of the sampling criterion for small offsets. To reduce cost we introduce a variable sampling scheme that depends only on input/output offsets and is independent of azimuth rotation angles. Costly numerical calculations of azimuth moveout can then be tabulated for an input offset range. Introduction Azimuth moveout (AMO) was introduced by Biondi et al. [1] to regularize multi-cable towed marine streamer data