Table T15. Source parameters for walkaway vertical seismic profile.
| Feature | Specification |
|---|---|
| Navigation system | SPECTRA (Concept Inc.) |
| Gun controller | Digishot Ver3.1 (ION Inc.) |
| Air gun | Annular Port Air Gun (BOLT Technology) |
| Gun configuration | 1950 in3 × 4 strings (Fig. F21) |
| Total volume (in3) | 7800 |
| Gun pressure (psi) | 2000 |
| Gun depth (m) | 8 |
| Kairei ship speed (kt) | 4 (against ground) recommended; <5 against ground or water required |
| Shooting interval for Line 1 (m) | 60 |
| Shooting interval for circle shooting (s) | 30 |
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