Main Pass OBC
Offshore Gulf of Mexico
Main Pass 4 - 105 Blocks (Available)
Main Pass 5 - 75 Blocks (Available)

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Aquisition Parameters
Geometry: Inline Swath (N-S)
Receiver line interval: 480m (2 Rx lines live)
Receiver interval: 50m
Source line interval: 40m (80m per vessel pass)
Source interval: 75m (37.5m alternating)
Source strength: 100bar-m
Bin size: 25m x 40m
Nominal fold: 120
Maximum offset: 9000m
Record length: 13sec
Sample Interval: 2ms

Processing Sequence (archive datasets in bold)
Receiver position computation
Reformat, trace edit, merge navigation (4C)
Re-sample to 4ms, offset limit to 9,000m, drop horizontal geophones
Cascaded Anomalous Amplitude Attenuation (AAA)
Dual Sensor Hydrophone-Geophone summation
Absorption compensation
Deconvolution
Cascaded AAA (CMP domain)
Surface Consistent Amplitude Compensation (SCAC)
Initial Velocity Analysis (2Km grid)
Refraction Statics
Residual Statics; 2 passes
Residual SCAC
Velocity Analysis: 1 Km grid
Cross line interpolation from 40m to 20m
Kirchhoff PreStack Time Migration (K PrSTM) 1Km lines for velocity analysis
Velocity Analysis for smoothed migration velocities
Kirchhoff PreStack Time Migration ½Km velocity lines for QC
Full volume curved-ray anisotropic K PrSTM; 59 offsets @ 150m (300 - 9000m) -> (Raw PrSTM gathers unflattened)
Final Stacking Velocity Analysis (½Km grid)
Normal Move-Out Compensation
Residual migration noise removal
Stack -> (Raw)
Weighted Least Squares radon multiple attenuation - one pass on KPrSTM gathers -> (NMO corrected PrSTM gathers)
Angle stacks (0-15°, 15-30°, 30-45°)
Poststack conditioning: Decon after stack (DAS) frequency enhancement / Tau-p dip enhancement / KxKy footprint attenuation / TVF / AGC -> (Conditioned)

Available Data Sets
Full volume KPrSTM stack (raw & conditioned)
KPrSTM gathers (raw & conditioned)
Near, mid & far KPrSTM angle stacks
Migration and Stacking velocities