Cruise/project information ------------------------------------------------------------------------------------- Cruise Name V3614 NGDC number 01030245 Platform Vema Ship Operator LDEO Chief Scientists Robert Leyden Principal Investigators All collaborating Institutions LDEO Beginning date 08/02/80 Ending date 08/24/80 MCS start date 08/03/80 MCS end date 08/21/80 Cruise Report Yes, paper Start Port Mianlla, Philippines End Port Hong Kong Project Name Area South China Sea Funding organization ? Award # 439-5097-5973 Abstract Description V3614 was the final multi-channel seismic leg of a cooperative survey of the northern margin odf the South China Sea. The survey was conducted in cooperation with the Peoples' Republic of China.Approximately ------------------------------------------------------------------------------------- navigation type Navy Transit Satellite fixes plus dead reckoning cdp navigation files in V3614.cdpnav.tar: Note: Nav files are in UTIG distribution format. Below is a listing of 1st and last cdps and lat/lon from each line cdpnav file in V3614.cdpnav.tar: Position_Correlation_Method: Position is at center of cmp bin and time is the time the ships's antenna was over that position. Trace_Position: trace Source_CMP_offsets_Applied: yes Latitude, Longitude, CMP, Year, Month, Day, Hour, Min, Sec, Msec, Linename, Cruisename V3614.68.cdpnav 18.918549 119.095131 15 1980 08 03 20 09 41 000 68 v3614 22.498439 118.018270 7628 1980 08 05 18 03 39 000 68 v3614 V3614.69.cdpnav 22.501442 117.972374 14 1980 08 05 18 35 55 000 69 v3614 22.586496 116.992408 2066 1980 08 06 06 17 50 000 69 v3614 V3614.70.cdpnav 22.486045 117.043101 14 1980 08 06 08 21 05 000 70 v3614 18.640678 118.303594 8186 1980 08 08 06 24 25 000 70 v3614 V3614.71.cdpnav 18.573598 118.225178 14 1980 08 08 09 51 16 000 71 v3614 18.361362 117.527780 1427 1980 08 08 17 54 36 000 71 v3614 V3614.72.cdpnav 18.407835 117.499021 14 1980 08 08 18 37 51 000 72 v3614 22.401834 116.188126 9011 1980 08 10 21 55 02 000 72 v3614 V3614.73.cdpnav 22.365519 116.135040 14 2980 08 10 23 00 08 000 73 v3614 21.302160 115.279384 2719 2980 08 11 14 25 23 000 73 v3614 V3614.74.cdpnav 21.319410 115.368865 14 1980 08 11 15 30 03 000 74 v3614 22.344785 118.443955 5958 1980 08 13 00 59 20 000 74 v3614 V3614.75.cdpnav 22.282482 118.554651 14 1980 08 13 02 32 25 000 75 v3614 21.078706 119.039231 2866 1980 08 13 18 25 22 000 75 v3614 V3614.76.cdpnav 21.041321 119.008948 14 1980 08 13 19 05 10 000 76 v3614 18.121804 112.075189 14887 1980 08 17 01 41 55 000 76 v3614 V3614.77.cdpnav 17.978655 112.122730 14 1980 08 18 12 37 24 000 77 v3614 21.592117 113.941627 8579 1980 08 20 11 22 36 000 77 v3614 V3614.78.cdpnav 21.620171 114.007990 14 1980 08 20 12 09 55 000 78 v3614 22.626086 116.950457 6483 1980 08 21 22 27 47 000 78 v3614 Field data cdp gathers on tape at LDEO Processed data files: Below is a list of SEG-Y stack files including header info from first and last traces each file. Fields are as follows: LINE CDP SHOT DATE TIME REC_DELAY SAMPLES SAMP_INT ------------------------------------------------------------------------------------- NEXT FILE /archive/seismic/processed/V3614/V3614.68.stk.15_07628 68 15 15 0 08/03/1980 216/20:10:22.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 920 AND 1046 68 920 920 0 08/04/1980 217/01:19:55.000 2000 3070 4000 00/00/ 0 68 1046 1046 0 08/04/1980 217/01:20:57.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 1503 AND 1615 68 1503 1503 0 08/04/1980 217/04:39:21.000 2000 3070 4000 00/00/ 0 68 1615 1615 0 08/04/1980 217/04:39:41.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 1709 AND 1724 68 1709 1709 0 08/04/1980 217/08:19:39.000 2000 3070 4000 00/00/ 0 68 1724 1724 0 08/04/1980 217/08:19:59.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 1724 AND 1773 68 1724 1724 0 08/04/1980 217/08:19:59.000 2000 3070 4000 00/00/ 0 68 1773 1773 0 08/04/1980 217/08:33:17.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 5477 AND 5566 68 5477 5477 0 08/05/1980 218/05:48:29.000 2000 3070 4000 00/00/ 0 68 5566 5566 0 08/05/1980 218/05:49:09.000 2000 3070 4000 00/00/ 0 68 7628 7628 0 08/05/1980 218/18:04:21.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.69.stk.12_02066 69 12 12 0 08/05/1980 218/18:35:55.000 0 3070 4000 00/00/ 0 69 2066 2066 0 08/06/1980 219/06:18:30.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.70.stk.12_08186 70 12 12 0 08/06/1980 219/08:21:05.000 0 3070 4000 00/00/ 0 70 8186 8186 0 08/08/1980 221/06:25:06.000 4000 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.71.stk.12_01427 71 12 12 0 08/08/1980 221/09:51:16.000 4000 3070 4000 00/00/ 0 71 1427 1427 0 08/08/1980 221/17:55:17.000 4000 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.72.stk.12_09011 72 12 12 0 08/08/1980 221/18:37:51.000 4000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 2676 AND 2804 72 2676 2676 0 08/09/1980 222/09:48:59.000 0 3070 4000 00/00/ 0 72 2804 2804 0 08/09/1980 222/09:49:19.000 0 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 3791 AND 3822 72 3791 3791 0 08/09/1980 222/16:10:29.000 0 3070 4000 00/00/ 0 72 3822 3822 0 08/09/1980 222/16:11:10.000 0 3070 4000 00/00/ 0 72 9011 9011 0 08/10/1980 223/21:55:43.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.73.stk.12_02719 73 12 12 0 08/10/1980 223/23:00:08.000 0 3070 4000 00/00/ 0 73 2719 2719 0 08/11/1980 224/14:26:05.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.74.stk.12_05958 74 12 12 0 08/11/1980 224/15:30:03.000 0 3070 4000 00/00/ 0 74 5958 5958 0 08/13/1980 226/01:00:01.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.75.stk.13_02866 75 13 13 0 08/13/1980 226/02:32:45.000 0 3070 4000 00/00/ 0 75 2866 2866 0 08/13/1980 226/18:26:01.000 2000 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.76.stk.12_14887 76 12 12 0 08/13/1980 226/19:05:10.000 2000 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 6278 AND 6293 76 6278 6278 0 08/15/1980 228/05:03:56.000 0 3070 4000 00/00/ 0 76 6293 6293 0 08/15/1980 228/05:04:15.000 0 3070 4000 00/00/ 0 76 14887 14887 0 08/07/1980 220/01:42:31.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.77.stk.12_02841 77 12 12 0 08/18/1980 231/12:37:24.000 0 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 1486 AND 1502 77 1486 1486 0 08/18/1980 231/20:37:01.000 0 3070 4000 00/00/ 0 77 1502 1502 0 08/18/1980 231/20:37:41.000 0 3070 4000 00/00/ 0 77 2841 2841 0 11/06/1980 311/00:45:28.000 0 3070 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.77.stk.12_08569 77 12 12 0 08/18/1980 231/12:37:24.000 0 3052 4000 00/00/ 0 CDPSP GAP BETWEEN 1486 AND 1501 77 1486 1486 0 08/18/1980 231/20:37:01.000 0 3052 4000 00/00/ 0 77 1501 1501 0 08/18/1980 231/20:37:21.000 0 3052 4000 00/00/ 0 77 8569 8569 0 08/20/1980 233/11:19:59.000 0 3052 4000 00/00/ 0 NEXT FILE /archive/seismic/processed/V3614/V3614.78.stk.12_06598 78 12 12 0 08/20/1980 233/12:09:55.000 0 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 2577 AND 2590 78 2577 2577 0 08/21/1980 234/02:04:25.000 0 3070 4000 00/00/ 0 78 2590 2590 0 08/21/1980 234/02:04:44.000 0 3070 4000 00/00/ 0 CDPSP GAP BETWEEN 4687 AND 4751 78 4687 4687 0 08/21/1980 234/13:23:47.000 0 3070 4000 00/00/ 0 78 4751 4751 0 08/21/1980 234/13:24:06.000 0 3070 4000 00/00/ 0 78 6598 6598 0 08/21/1980 234/23:03:56.000 0 3070 4000 00/00/ 0 ------------------------------------------------------------------------------------- cdp spacing 50 meters Each SEG-Y file has a corresponding ASCII history file. processing system LDEO MCS Inhouse General processing history: Lines 68-70,740-76, 77 (cdps 12-2841) Burg Decon Band Pass Water Velocity Moveout Wiener Filter to remove seafloor multiple Differential moveout (v2) Stack Line 71 NMO (v1) Stack Lines 72-73 Burg Decon Band Pass Water Velocity Moveout Wiener Filter to remove seafloor multiple Differential moveout (v1) Stack Line 77 (cdps 12-8569) Burg Decon Band Pass NMO (v1) Stack COMMENT: The cdp gathers were made assuming a constant 50 meters between shots. The cdp number was assigned the shot number of the far trace in the gather. The time in the stack header was assigned the time of the near trace in the header. Some dates/times in the headers are incorrect. They have been corrected in the cdpnav files. Times are GMT. V3614 Seismic Acquisition Parameters (Geometry and souce information based on other Vema MCS cruises.) ********************************************************** V3614_ACQ001 Number of Channels 12 Group Spacing 100 meters Cable length 1200 meters Source to Near Channel 140 meters Antenna to Source Unknown Antenna to Stern 53 meters Near Channel Number 12 Cable Depth 10 meters Acquisition System Name DFS IV Source Volume 932 cu in Source Pressure 2000 Source Type Bolt 1500C Source Number 2 Source Depth 7-10 m Shot Control Time (every 17-30@#econds for approximately 50 meters) Acquisition Sample Interval 4000 microseconds Record Length 12.288 seconds CompassBirds No Active Tail Buoy No Recording Delay Yes Acquisition System Analog 2 or more ships No **********************************************************