IODP operator and logging contractor: LDEO-BRG Hole: U1320A Expedition: 308 Location: Brazos-Trinity Basin IV (Gulf of Mexico) Latitude: 27° 18.0809'N Longitude: 94° 23.2537'W Logging date: June 9-10, 2005 VSP STACK SUMMARY LISTING (one-way transit times) Gun and Hydrophone Coordinates: Gun Azimuth: 0.0 deg Gun Offset: 49.0 m Gun Depth (from Schlumberger Zero): 13.3 m Hydrophone Depth (from Schlumberger Zero): 13.3 m Seismic Reference Depth (from Schlumberger Zero): 11.3 m Other VSP constants: Surface Velocity: 1524 m/s Acquisition Break Time: Time between start of recording and first break Acquisition Transit Time: Time between shot firing (as recorded by blast phone) and first break. The shot is fired ~12 milliseconds after start of recording. The difference between Acquisition Break Time and Acquisition Transit Time is not constant and varies for each shot. SHOTSEQUENCE ACQUISITION_ ACQUISITION_ CABLE_LENGTH ACQUISITION_ ACQUISITION_ _NUMBER SHOT_NUMBER SHOT_TIME (m) BREAK_TIME TRANSIT_ ----- ----- ----- ----- (s) TIME ----- ----- ----- ----- ----- (s) ----- ----- ----- ----- ----- ----- 14 1000 11-06-2005:07:28:15 1769.999023 0.000000 0.000000 15 1001 11-06-2005:07:30:21 1769.999023 1.169167 1.156525 13 1002 11-06-2005:07:32:25 1748.497803 1.157993 1.145464 12 1003 11-06-2005:07:36:05 1746.097534 1.155833 1.143346 10 1004 11-06-2005:07:38:30 1729.897461 1.146998 1.134423 11 1005 11-06-2005:07:39:32 1729.897461 1.147083 1.134484 9 1006 11-06-2005:07:40:54 1709.999146 1.135418 1.122823 8 1007 11-06-2005:07:41:58 1689.999146 1.124164 1.111675 7 1008 11-06-2005:07:43:01 1674.799805 1.114583 1.102012 6 1009 11-06-2005:07:46:01 1659.897583 1.105448 1.092856 5 1010 11-06-2005:07:46:51 1639.897705 1.093478 1.080864 4 1011 11-06-2005:07:47:38 1624.998047 1.084375 1.071756 3 1012 11-06-2005:07:48:24 1611.998291 1.076463 1.063838 2 1013 11-06-2005:07:49:14 1589.999268 1.062616 1.049976 1 1014 11-06-2005:07:49:57 1579.999390 1.056540 1.043935 0 1015 11-06-2005:07:50:22 1564.998169 1.047466 1.034850