| Field acquisition: |
| Vessel: Thomas Thompson |
| Cruise: TN037 |
| Start date: 23 Jul 1994 |
| End date: 4 Sep 1994 |
| Source: |
| 1. Air gun array: 200, 150, 108, and 80 in3 |
| 2. GI air gun: 45/105 in3 |
| Pressure: 2000 psi |
| Shot interval: |
| Maximum: 37 m |
| Minimum: 25 m |
| Streamer: |
| Active group length: 25 m |
| Number of groups: 6 |
| Recording: |
| Acquisition hardware: Sun SPARC10 |
| Acquisition software: "a2d" |
| Data format: SEGY |
| Data length: 6-7 s |
| Delay: 2-3 s |
| Shot interval: 10 s |
| Sample interval: 1 ms |
| Filters: |
| Low: 15 hz (24 dB/oct) |
| High: 3khz (24 dB/oct) |
| Processing sequence: |
| Pick water bottom time (WBT) |
| Despike |
| Bandpass filter 5-200 Hz |
| Geometry definition, insert WBT in header |
| Mute to water bottom |
| Spherical divergence correction |
| Resample (2 ms) |
| Notch filter (60 Hz) |
| Deconvolution |
| Velocity analysis |
| NMO correction |
| Stack |
| Pick and apply static correction |
| Finite difference migration |
| Time-varying filter: |
| Seafloor to 0.25 s: 30-150 Hz |
| 0.25 to 1.0 s: 20-150 Hz |
| 1.0 s to end of record: 6-70 Hz |
| Gain (500 ms AGC) |
| Mute to water bottom |
Notes: Data were processed at the Ocean Drilling Program, Texas A&M University. Processing software: SIOSEIS and PROMAX. Data were processed by Michael Holzrichter and Adam Klaus. NMO = normal moveout. AGC = automatic gain control.