RC2101 Cruise/project information ------------------------------------------------------------------------------------- Cruise Name RC2101 NGDC number 01010176 Platform Conrad Ship Operator LDEO Chief Scientist C. Windisch Principal Investigator Manik Talwani All collaborating LDEO Institutions Beginning date 09/08/77 Ending date 09/28/77 MCS start date 09/16/77 MCS end date 09/26/77 Cruise Report yes - paper Start Port Piermont, NY End Port St. George''s, Bermuda Project Name COST B-II Project Description The primary objective of this cruise was to run a series of MCS lines on the continental shelf,on the upper and lower continental rise and in the abyssal plain in an effort to compare MCS and sonobuoy methods for determining sediment velocities in areas typical of the major physiographic provinces along the eastern seaboard. Funding organization ONR Award # N00014-75-C-0210 Abstract NO ++ ------------------------------------------------------------------------------------- navigation type: US Navy Transit Satellite cdp navigation files in RC2101.cdpnav.tar: 68.cdpnav 69.cdpnav 70.cdpnav 73.cdpnav 74.cdpnav 75A.cdpnav 75B.cdpnav 76.cdpnav 77.cdpnav 78.cdpnav RC2101.all.cdpnav RC2101.line.start_end.cdpnav Please note: All time are Glocal - 4 hours behind GMT. 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: 68.cdpnav 38.999124 -072.219535 28 1977 09 16 19 21 45 000 68 rc2101 39.201693 -072.883571 1250 1977 09 17 02 18 45 000 68 rc2101 69.cdpnav 39.252426 -072.875025 28 1977 09 17 03 11 02 000 69 rc2101 39.599924 -072.470307 985 1977 09 17 08 37 35 000 69 rc2101 70.cdpnav 39.600868 -072.487175 28 1977 09 17 08 47 57 000 70 rc2101 39.565554 -073.128702 1356 1977 09 17 16 21 07 000 70 rc2101 73.cdpnav 39.784245 -071.374436 28 1977 09 19 05 58 24 000 73 rc2101 38.476389 -070.860421 2941 1977 09 19 22 32 22 000 73 rc2101 74.cdpnav 38.436475 -070.889921 28 1977 09 19 23 15 19 000 74 rc2101 38.362954 -071.668302 1426 1977 09 20 07 12 20 000 74 rc2101 75A.cdpnav 38.328153 -071.667040 28 1977 09 20 08 02 58 000 75 rc2101 37.733717 -070.422879 2237 1977 09 20 20 36 43 000 75 rc2101 75B.cdpnav 37.573986 -070.033193 28 1977 09 21 15 19 45 000 75 rc2101 36.408996 -069.449325 3446 1977 09 22 10 45 03 000 75 rc2101 76.cdpnav 36.439650 -069.473875 28 1977 09 23 00 00 21 000 76 rc2101 35.748196 -070.400700 2187 1977 09 23 12 17 02 000 76 rc2101 77.cdpnav 35.707527 -070.378757 28 1977 09 23 12 52 30 000 77 rc2101 32.302758 -070.476931 9320 1977 09 25 17 43 08 000 77 rc2101 78.cdpnav 32.302692 -070.456056 28 1977 09 25 17 55 45 000 78 rc2101 32.302049 -068.679190 3251 1977 09 26 12 15 31 000 78 rc2101 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 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. Some header times may be incorrect. The times in the cdpnav files should be correct. Lines 67, 71 and 72 are not included. I'm not sure whether the stack tapes were unreadable or the lines never processed. There should be records that say which but I don't have them available right now. The delays and number of samples may vary within a line. 3072 was put in the binary header for the number of samples for all lines. Fields are as follows: LINE CDP SHOT SOURCE DATE TIME REC_DELAY SAMPLES SAMP_INT POINT ------------------------------------------------------------------------------------- NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/68.stk.25_1250 68 25 25 0 09/15/1977 258/19:22:06.000 2000 2572 4000 00/00/ 0 68 1250 1250 0 09/16/1977 259/02:20:07.000 0 3072 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/69.stk.24_985 69 24 24 0 09/16/1977 259/03:11:02.000 0 3072 4000 00/00/ 0 69 985 985 0 09/16/1977 259/08:38:57.000 0 3072 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/70.stk.24_1356 70 24 24 0 09/16/1977 259/08:47:57.000 6680 1402 4000 00/00/ 0 CDPSP GAP BETWEEN 679 AND 745 70 679 679 0 09/16/1977 259/12:31:28.000 6680 1402 4000 00/00/ 0 70 745 745 0 09/16/1977 259/12:31:28.000 6680 270 4000 00/00/ 0 CDPSP GAP BETWEEN 801 AND 851 70 801 801 0 09/16/1977 259/13:13:04.000 6680 1402 4000 00/00/ 0 70 851 851 0 09/16/1977 259/13:30:09.000 6680 1402 4000 00/00/ 0 70 1356 1356 0 09/16/1977 259/16:22:28.000 6680 1402 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/73.stk.24_2941 73 24 24 0 09/19/1977 262/05:58:24.000 500 2947 4000 00/00/ 0 CDPSP GAP BETWEEN 2359 AND 2433 73 2359 2359 0 09/19/1977 262/19:15:08.000 3500 2697 4000 00/00/ 0 73 2433 2433 0 09/19/1977 262/19:40:24.000 3500 2697 4000 00/00/ 0 73 2941 2941 0 09/19/1977 262/22:33:44.000 3500 2697 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/74.stk.24_1426 74 24 24 0 09/18/1977 261/23:15:19.000 3500 2697 4000 00/00/ 0 74 1426 1426 0 09/19/1977 262/07:13:43.000 3500 2698 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/75A.stk.24_2237 75 24 24 0 09/19/1977 262/08:02:58.000 3500 2697 4000 00/00/ 0 75 2237 2237 0 09/19/1977 262/20:38:04.000 4500 2697 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/75B.stk.27_3446 75 27 27 0 09/20/1977 263/15:20:36.000 5000 2572 4000 00/00/ 0 75 3446 3446 0 09/21/1977 264/10:46:26.000 5500 2698 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/76.stk.25_2186 76 25 25 0 09/22/1977 265/00:00:41.000 5600 2673 4000 00/00/ 0 76 2186 2186 0 09/22/1977 265/12:18:03.000 5800 2622 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/77.stk.24_9320 77 24 24 0 09/22/1977 265/12:52:30.000 5500 2697 4000 00/00/ 0 CDPSP GAP BETWEEN 5290 AND 5320 77 5290 5290 0 09/23/1977 266/18:49:24.000 6800 3070 4000 00/00/ 0 77 5320 5320 0 09/23/1977 266/18:59:37.000 6800 2623 4000 00/00/ 0 CDPSP GAP BETWEEN 6681 AND 6716 77 6681 6681 0 09/24/1977 267/02:44:03.000 6800 3070 4000 00/00/ 0 77 6716 6716 0 09/24/1977 267/02:55:58.000 6800 2622 4000 00/00/ 0 77 9320 9320 0 09/24/1977 267/17:44:30.000 6800 2622 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/77.stk.500_1499 77 500 500 0 09/22/1977 265/15:34:57.000 5500 2698 4000 00/00/ 0 CDPSP GAP BETWEEN 1158 AND 1232 77 1158 1158 0 09/22/1977 265/19:19:27.000 5500 2947 4000 00/00/ 0 77 1232 1232 0 09/22/1977 265/19:44:42.000 6000 2822 4000 00/00/ 0 77 1499 1499 0 09/22/1977 265/21:15:49.000 6000 2822 4000 00/00/ 0 NEXT FILE /data/mstorer2/ldeo_1/users/link/seismic/processed/RC2101/78.stk.25_3251 78 25 25 0 09/24/1977 267/17:56:05.000 6800 2622 4000 00/00/ 0 78 3251 3251 0 09/25/1977 268/12:16:53.000 6500 2697 4000 00/00/ 0 processing system LDEO MCS Inhouse processing All: normal moveout and stack Line 68: outside mute Lines 73,76,77: Burg decon, bandpass, water vel moveout, wiener filter, differential moveout and stack See history files for each line. cdp spacing 50 meters ------------------------------------------------------------------------------------- ********************************************************** RC2101 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 UNKNOWN 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 (about every 20 seconds for approximately 50 meters) Acquisition Sample Interval 4000 microseconds Record Length 12 seconds Compass No Active Tail Buoy No Recording Delay Yes Acquisition System Analog 2 or more ships No ********************************************************** **********************************************************