RC2106 Cruise/project information ------------------------------------------------------------------------------------- Cruise Name RC2106 NGDC number 01010181 Platform Conrad Ship Operator LDEO Chief Scientist William J. Ludwig Principal Investigator William J. Ludwig John L. LaBreque All collaborating LDEO Institutions Beginning date 03/03/78 Ending date 04/04/78 MCS start date 03/03/78 MCS end date 04/04/78 Cruise Report yes - paper Start Port Buenos Aires, Argentina End Port Punta Arenas, Chile Project Name Falkland Plateau Project Description A multichannel seismic reflection study of the Falkland Plateau, Falkland Trough and North Scotia Ridge. Funding organization NSF Award # OCE77-25992 Abstract NO ------------------------------------------------------------------------------------- navigation type: US Navy Transit Satellite cdp navigation files in RC2106.cdpnav.tar: 138A.cdpnav 138B.cdpnav 139.cdpnav 140.cdpnav 141.cdpnav 142A.cdpnav 142B.cdpnav 143.cdpnav 144.cdpnav 145.cdpnav RC2106.all.cdpnav Note: Shot times were not updated for cdps 6600-16851, line 139. Times were interpolated in this range for the purpose of assigning lat/lon. The interpolation yielded a 20 sec shot interval which was expected. Below is a listing of 1st and last cdps and lat/lon from each line cdpnav file: 138A.cdpnav 138 30 -47.031596 -057.500065 138 1610 -47.749899 -057.515958 138B.cdpnav 138 760 -47.769830 -057.514819 138 1590 -48.169846 -057.535392 139.cdpnav 139 30 -51.176548 -057.439751 139 24150 -50.936841 -039.152222 140.cdpnav 140 30 -50.960229 -039.146493 140 3930 -52.423280 -041.133163 141.cdpnav 141 30 -51.800217 -041.478248 141 8330 -48.848113 -045.047710 142A.cdpnav 142 30 -48.823138 -045.673475 142 4710 -50.764693 -046.820195 142B.cdpnav 142 30 -50.779748 -046.829625 142 6860 -53.868269 -048.234729 143.cdpnav 143 30 -53.930383 -049.426001 143 11970 -48.565578 -051.364584 144.cdpnav 144 30 -48.579013 -051.508800 144 16250 -55.161329 -057.165093 145.cdpnav 145 16480 -55.149039 -057.153748 145 21810 -52.808225 -058.481450 processing: normal moveout and stack field data: cdp gathers at LDEO processed data files: Below is a list of SEG-Y stack files including header info from first and last traces each file. Note times in trace headers are local time (GMT=local + 3 hours). Fields are as follows: LINE CDP SHOT DATE TIME REC_DELAY SAMPLES SAMP_INT NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/138A.stk.26_1612 138 26 0 03/09/1978 068/09:31:31.000 5000 1024 4000 1 138 1612 0 03/09/1978 068/18:32:33.000 5004 1024 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/138B.stk.748_1593 138 748 0 03/09/1978 068/18:41:26.000 5000 1025 4000 1 138 1593 0 03/09/1978 068/23:29:46.000 1900 1049 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/139.stk.24_24150 139 24 0 03/11/1978 070/10:36:20.000 0 1024 4000 1 139 24150 0 03/17/1978 076/00:40:07.000 5300 1849 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/140.stk.24_3930 140 24 0 03/17/1978 076/01:54:41.000 5000 2048 4000 1 140 3930 0 03/18/1978 077/00:02:49.000 4700 1999 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/141.stk.24_8331 141 24 0 03/18/1978 077/08:39:07.000 4004 2048 4000 1 141 8331 0 03/20/1978 079/03:42:32.000 6000 2049 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/142A.stk.24_4707 142 24 0 03/20/1978 079/10:02:27.000 7200 1748 4000 1 142 4707 0 03/21/1978 080/13:42:26.000 2800 1974 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/142B.stk.24_6860 142 24 0 03/21/1978 080/13:55:17.000 2700 1999 4000 1 142 6860 0 03/23/1978 082/04:52:42.000 5300 1974 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/143.stk.25_11967 143 25 0 03/23/1978 082/13:54:45.000 5000 2049 4000 1 143 11967 0 03/26/1978 085/08:00:12.000 7500 2049 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/144.stk.25_16249 144 25 0 03/26/1978 085/09:50:00.000 7800 2623 4000 1 144 16249 0 03/30/1978 089/00:42:18.000 2500 3072 4000 1 NEXT FILE /home/mcspad/mstore/mcsdata/rc2106/145.stk.16472_21810 145 16472 0 03/30/1978 089/01:50:56.000 2800 3072 4000 1 145 21810 0 03/31/1978 090/05:52:26.000 500 2947 4000 1 ------------------------------------------------------------------------------------- processing system LDEO MCS Inhouse processing normal moveout and stack cdp spacing 50 meters ------------------------------------------------------------------------------------- RC2106 Seismic Acquisition Parameters ********************************************************** Number of Channels 24 Group Spacing 100 meters Source to Near Channel 300 meters (Not precise but typical for the Conrad at this time) Antenna to Source 40 meters " " " " Near Channel Number 24 Cable Depth 45-50 feet Acquisition System Name DSFIV Source Volume 1864 cu. in. Source Pressure 2000 psi Source Type Bolt 1500C Source Number 4 Source Depth UNKNOWN meters Shot Control Time (every 20 seconds for approximately 50 meters) Acquisition Sample Interval 4000 microseconds Record Length variable (1 to 3 seconds) Compass No Active Tail Buoy No Recording Delay Yes Acquisition System Analog 2 or more ships No ********************************************************** ********************************************************** **********************************************************