2. GEOPHYSICAL PROFILING1 INTRODUCTION NAVIGATION...gram, Texas A&M University, College Station, TX 77840; Francis Alvarez, Bore hole Research Group, Lamont-Doherty Geological Observatory,

2. GEOPHYSICAL PROFILING1

Elliott Taylor2, Mark Benson3, and Shipboard Scientific Party4

INTRODUCTION

Site selection for ODP Leg 110 on the Barbados forearc was based on multichannel seismic (MCS) profiles described in Chapter 1. Positioning the ship to core at these previously chosen locations required using a combination of navigation and recognition of bathymetric features such as slope breaks and ponded sediments, and seismic structural characteristics. Underway geophysical data were collected as we approached all sites except where only minor offsetting was required (i.e., usually less than 1-2 km). The shipboard geophysical data provided the tie needed to position the ship at preferred locations relative to the principal MCS seismic sections.

The JOIDES Resolution was underway 4.5% of the time during the 50.7 days spent at sea. During most of this time routine geophysical measurements were obtained. The onboard instrumentation used included precision echo-sounders, magne-

1 Mascle, A., Moore, J. C , et al., 1988. Proc, Init. Repts. (Pt. A), ODP, 110: College Station, TX (Ocean Drilling Program).

2 Ocean Drilling Program, Texas A&M University, 1000 Discovery Drive, College Station, TX 77840.

3 Department of Geophysics, Texas A&M University, College Station, TX 77843.

4 Alain Mascle (Co-Chief Scientist), Institut Francais du Petrole, 1-4 Ave Bois-Preau, B.P. 311, 92506 Rueil Malmaison Cedex, France; J. Casey Moore (Co-Chief Scientist), Dept, of Earth Sciences, University of California at Santa Cruz, Santa Cruz, CA 95064; Elliott Taylor (Staff Scientist), Ocean Drilling Program, Texas A&M University, College Station, TX 77840; Francis Alvarez, Borehole Research Group, Lamont-Doherty Geological Observatory, Columbia University, Palisades, NY 10964; Patrick Andreieff, BRGM, BP 6009, 45060 Orleans Cedex-2, France; Ross Barnes, Rosario Geoscience Associates, 104 Harbor Lane, Anacortes, WA 98221; Christian Beck, Departement des Sciences de la Terre, Universite de Lille, 59655 Villeneuve d'Ascq Cedex, France; Jan Behrmann, Institut fur Geowissenschaften und Lithospharenforschung, Universitat Giessen, Sencken-bergstr. 3, D6300 Giessen, FRG; Gerard Blanc, Laboratoire de Geochimie et Me-tallogenie U. A. CNRS 196 U.P.M.C. 4 Place Jussieu, 75252 Paris Cedex 05, France; Kevin Brown, Dept, of Geological Sciences, Durham University, South Road, Durham, DH1 3LE, U.K. (current address: Dept, of Earth Sciences, University of California at Santa Cruz, Santa Cruz, CA 95064); Murlene Clark, Dept, of Geology, LSCB 341, University of South Alabama, Mobile, AL 36688; James Dolan, Earth Sciences Board, University of California at Santa Cruz, Santa Cruz, CA 95064; Andrew Fisher, Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149; Joris Gieskes, Ocean Research Division A-015, Scripps Institution of Oceanography, La Jolla, CA 92093; Mark Hounslow, Dept, of Geology, Sheffield University, Brook Hill, Sheffield, England S3 7HF; Patrick McLellan, Petro-Canada Resources, PO Box 2844, Calgary, Alberta Canada (current address: Applied Geotechnology Associates, 1-817 3rd Ave. NW, Calgary, Alberta T2N OJ5 Canada); Kate Moran, Atlantic Geoscience Centre, Bedford Institute of Oceanography, Box 1006, Dartmouth, Nova Scotia B2Y 4A2 Canada; Yujiro Ogawa, Dept, of Geology, Faculty of Science, Kyushu University 33, Hakozaki, Fukuoka 812, Japan; Toyosaburo Sakai, Dept, of Geology, Faculty of General Education, Utsunomiya University, 350 Mine-machi, Utsunomiya 321, Japan; Jane Schoonmaker, Hawaii Institute of Geophysics, 2525 Correa Road, Honolulu, HI 96822; Peter J. Vrolijk, Earth Science Board, University of California at Santa Cruz, Santa Cruz, CA 95064 (current address: Dept, of Earth Sciences, University of Cambridge, Downing Road, Cambridge, CB2 3EQ, England; Roy Wilkens, Earth Resources Laboratory, E34-404 Massachusetts Institute of Technology, Cambridge, MA 02139 (current address: Hawaii Institute of Geophysics, 2525 Correa Road, Honolulu, HI 96822); Colin Williams, Borehole Research Group, Lamont-Doherty Geological Observatory, Columbia University, Palisades, NY 10964.

tometer, seismic reflection profilers, and satellite navigation systems. The instruments were maintained and operated by the ODP marine technicians, in cooperation with the scientific party and the officers and crew of SEDCO-SCHLUMBERGER, Inc.

NAVIGATION A variety of navigational aids were used when underway, in

transit between sites, and during site approaches. The ship has two transit satellite receivers: a Magnavox 1107-GPS, located aft in the underway geophysics laboratory, and a Magnavox 702A-3 located on the bridge. The satellite receiver in the laboratory receives fixes from the Global Positioning System (GPS) as well as the standard transit satellite system. Both the Magnavox 1107-GPS and the Magnavox 702HP satellite receivers calculate dead-reckoning positions.

Satellite fixes were written to the extended tape headers on a Masscomp computer (Table 1) and extracted later to produce a general navigation plot for Leg 110 (Fig. 1). Satellite navigation fixes collected during Leg 110 are indicated by date and time in Figures 1 and 2. Figure 2 is an expanded view of the ship track and site locations of Leg 110 operations. Navigation for the tracks shown are derived from both satellite fixes and dead-reckoning data. Fixes collected while on site are averaged and a single point is plotted for the entire site. All navigation is plotted on Mercator projection maps.

BATHYMETRIC DATA RECORDING Bathymetric data were collected at 3.5 and 12 kHz during

site approaches. The standard 3.5-kHz system uses an array of 12 Raytheon TR-109 transducers and a Raytheon PTR-105B transceiver. The data were displayed on an EDO model 550 flatbed recorder. A Raytheon CESP-III correlator was used to improve signal-to-noise ratio (20 dB). Pulse width for the hull-mounted array, located 6 m below sea level, was 100 ms.

The ship has two 12-kHz transducers: a Raytheon TC-12/34 is mounted aft of the moon pool and an EDO 323B is mounted forward, under the bridge. The 12-kHz system uses an EDO 248C transceiver and an EDO 550 flatbed recorder. All bathymetric data obtained during Leg 110 is available, upon request, from the ODP Data Base Supervisor.

MAGNETICS Total intensity measurements of the Earth's magnetic field

were obtained with a Geometries 801 proton precession magnetometer, the sensor of which was towed approximately 300 m astern. These data were recorded in the header of seismic tapes, one reading per seismic shot, and were also recorded manually every 5 min in the geophysical log. This measurement was displayed in real time on a strip chart recorder and is available from the ODP Data Base Supervisor.

SEISMIC REFLECTION PROFILES Single-channel seismic reflection data were collected along

four lines during ODP Leg 110. The following equipment was employed.

27

E. TAYLOR, M. BENSON, AND SHIPBOARD SCIENTIFIC PARTY

Sources

Lines 1 and 5 were shot with two synchronized 80-in3. Seismic System, Inc. water guns. The source for Line 3 consisted of one 400-in.3 watergun towed at 10 to 15 ft below sea level.

Streamer-hydrophones A Teledyne Model 178 streamer, 100 m long, was towed less

than 500 m behind the vessel. The streamer contains 60 equally spaced hydrophones whose output is transformer-coupled to the ship. The towing depth was set by external depth depressors (birds). The hydrophone elements were combined to produce a single signal.

Data Recording The unprocessed 20- to 250-Hz prefiltered digital signal was

recorded on 9-track magnetic tape using an SEG-Y format and a density of 1600 bpi. In addition to the magnetometer and navigation data discussed above, the header file for each shotpoint on the magnetic tape includes the following information: shot-point number, field time break delay, date and time, wind speed and direction, ship's speed (pit log), ship's gyro heading, cumulative distance traveled, streamer and gun depth, and information concerning timing of gun firing. These data can be obtained, on request, from the ODP Database Supervisor.

The seismic system used a super-micro 561 Masscomp computer to record, process, and display the data. The processed profiles were displayed approximately 3 min after measurement on a 15-in.-wide Printronix high-resolution graphic printer (160 dots per inch).

Seismic data were also displayed in real time in analog format on two EDO 550 dry-paper recorders. The streamer signal was passed through amplifiers and band-pass filters to each recorder. These analog seismic lines are not shown here but can be obtained, on request, from the ODP Data Base Supervisor.

SEISMIC PROCESSING Leg 110 survey seismic lines were reprocessed at ODP-TAMU

Headquarters after the cruise. The processing techniques applied are described in Table 2. The reprocessing profiles were displayed on a 22-in.-wide Versatec plotter (200 dots per in.). See Figures 3 to 6.

Seismic lines were displayed with the following plotting parameters:

Traces per inch: 22 Clip high: 0.10 in. Clip Low: -0.10 in. Deflection: 0.10 in. SP numbering increment: 20 Plot time scale: 6.25 in./s Variable area display Positive peaks to the right

ACKNOWLEDGMENTS The scientific party of Leg 110 is extremely grateful to Captain Ed

Oonk, his officers and crew for their excellence in navigation and cooperative spirit. Thanks goes also to the ODP group for the many hours of watch-standing and to Mark Weiderspahn and Ali Tufayli of the University of Texas at Austin who designed and wrote the seismic digital acquisition system.

Table 1.

Date

June 1986

26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26

Navigation data for Leg 110

Time a(UTC)

*1621 1741 1747 1749 1758 1800 1801 1802 1803

*1808 1823 1847 1854 1906 1909 1925 1928 1945 1947 2006 2007 2017 2029 2045 2058 2112 2133 2135 *2140 2141 2145 2201 2214 2224 2232

N. deg

13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 14 14 14 14

lat. min

6.28 16.7 17.8 18.1 19.7 20.1 20.2 20.4 20.6 21.44 24.2 28.5 29.6 31.8 32.3 35.1 35.6 38.6 38.9 42.3 42.4 44.2 46.3 49.2 51.5 54.0 57.6 57.8 58.66 58.9 59.7 2.7 5.3 7.0 8.4

W. deg

59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59

long. min

37.87 40.8 41.2 41.3 41.8 42.0 42.0 42.1 42.1 41.66 40.4 38.3 37.7 36.7 36.4 35.0 34.8 33.3 33.1 31.5 31.4 30.6 29.5 28.1 27.0 25.8 24.0 23.9 23.45 23.4 23.3 22.8 22.3 21.5 20.9

Cum. dis. nmi

0 10.8 12.0 12.3 14.0 14.4 14.5 14.7 14.9 15.8 18.8 23.6 24.9 27.3 27.8 31.0 31.5 34.8 35.2 38.9 39.0 41.0 43.4 46.5 49.1 51.8 55.8 56.1 57.0 57.2 58.0 61.1 63.7 65.6 67.1

VlsllOA-103

Actual speed kt

8.1 11.4 10.4 11.2 11.4 8.3 11.4 10.9 11.3 12.0 11.9 11.1 12.0 10.7 11.9 10.7 11.7 10.7 11.8 7.6 11.9 11.8 11.8 11.7 11.7 11.5 7.0 11.6 11.7 12.1 11.5 12.1 11.3 11.5 11.1

cse deg

344 342 343 342 343 344 342 357 24 24 25 26 25 26 26 26 25 26 25 29 25 25 25 25 25 25 31 26 10 9 9 10 24 25 24

Drift speed kt

1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.8 1.8 1.8 1.8 1.8 1.8 1.8

cse deg

138 138 138 138 138 138 138 138 138 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 284 284 284 284 284 284 284

Dead speed kt

9.6 13.0 12.0 12.8 12.9 9.9 13.0 12.3 12.1 12.1 12.0 11.2 12.1 10.8 12.0 10.8 11.8 10.7 11.9 7.6 12.0 11.9 11.9 11.8 11.8 11.6 7.0 11.7 11.7 12.1 11.5 12.1 11.7 11.9 11.6

rec. cse deg

340 339 340 339 340 340 339 352 17 17 18 18 18 18 19 18 18 18 18 18 18 18 18 18 18 18 19 19 19 17 18 18 33 33 33

comm.

bSN cc/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs

28

Table 1 (continued).

GEOPHYSICAL PROFILING

Cum. Time N. lat. W. long. dis.

Date a(UTC) deg min deg min nmi

June 1986 (cont.)

26 26 26 26 26 26 26 26 26 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27

2241 2246 2257 2310 2320 *2328 2329 2350 2358 0000 0008 0010 0031 0041 *0042 0046 0054 0103 0104 0112 0124 0132 0147 0149 0209 0212 0214 0218 0225 *0230 0248 0303 0308 0311 0357 *0358 0401 0402 0417 0437 0442 0450 0455 0457 0510 0520 0533 0535 0541 0543 0546 *0548 0551 0554 0613 0636 0644 0645 0646 0650 0651 0652 0654 0700 0709 0710 0711 0712 0720 0741 0742 0744 0747 *0752 0754

14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15

9.9 10.8 12.7 14.9 16.7 18.16 18.4 22.6 24.1 24.5 26.1 26.4 30.5 32.5 32.67 33.5 35.0 36.7 36.8 38.3 40.7 42.3 45.3 45.6 49.6 50.2 50.4 51.1 52.4 53.34 56.7 59.3 0.2 0.8 9.1 9.27 9.8 9.9 12.6 16.1 17.0 18.5 19.3 19.5 21.8 23.6 26.0 26.2 27.3 27.6 28.0 28.22 28.5 28.8 30.5 32.6 33.4 33.5 33.6 33.6 33.6 33.5 33.4 33.3 32.9 32.9 32.8 32.7 32.8 32.8 32.7 32.7 32.6 32.65 32.7

59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58

20.2 19.8 18.9 17.8 17.1 16.44 16.4 14.6 13.9 13.7 13.1 12.9 11.2 10.3 10.24 9.9 9.2 8.4 8.4 7.7 6.8 6.1 5.0 4.9 3.3 3.1 3.1 2.8 2.1 1.62

59.7 58.0 57.5 57.1 52.0 51.88 51.5 51.5 49.7 47.4 46.8 45.8 45.2 45.1 43.6 42.4 40.9 40.7 40.0 39.8 39.7 39.61 39.6 39.6 39.7 39.8 39.8 39.8 39.9 40.4 40.5 40.6 40.6 40.4 40.1 40.1 40.1 40.3 41.3 43.8 43.9 43.9 43.9 43.68 43.5

68.8 69.8 71.9 74.4 76.3 77.8 78.1 82.6 84.3 84.7 86.4 86.7 91.2 93.3 93.5 94.4 96.1 98.0 98.0 99.7 102.3 104.0 107.2 107.5 111.8 112.4 112.5 113.4 114.8 115.9 119.7 122.8 123.8 124.5 134.2 134.4 135.0 135.1 138.3 142.5 143.5 145.2 146.3 146.5 149.3 151.4 154.2 154.5 155.7 156.1 156.5 156.7 157.0 157.3 159.0 161.1 161.9 162.0 162.1 162.6 162.7 162.8 162.9 163.1 163.6 163.7 163.8 163.9 164.9 167.3 167.4 167.5 167.6 167.8 168.0

Actual Drift Dead rec. speed cse speed cse speed cse kt deg kt deg kt deg comm,

11.4 11.4 11.6 11.5 11.8 12.9 13.0 12.4 13.0 13.0 9.4 12.8 12.7 13.1 13.0 12.5 12.8 2.1 12.5 12.9 12.7 12.9 10.0 12.8 13.0 4.0 12.7 12.2 12.6 12.6 12.5 12.5 13.0 12.6 12.5 12.6 7.5 12.6 12.7 12.5 12.9 12.5 6.4 12.8 12.8 12.8 8.8 12.7 11.1 8.0 6.4 5.9 5.7 5.3 5.6 5.6 6.9 7.1 7.2 7.5 5.1 2.4 2.3 3.2 4.1 5.5 6.8 7,5 7.0 6.0 2.5 1.8 2.3 5.1 6.0

25 25 25 21 23 22 22 23 22 22 20 22 23 23 25 24 24 339 23 21 21 20 20 21 21 3 22 27 26 29 31 31 31 31 30 31 30 32 32 32 33 33 29 32 32 32 31 32 26 23 16 1

355 359 357 359 340 308 275 258 222 174 139 135 183 220 248 273 270 234 185 149 72 89 90

1.8 1.8 1.8 1.8 1.8 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.2 1.2 1.2 1.2 1.2 1.2 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.0 1.0

284 284 284 284 284 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 317 329 329 329 329 329 329 342 342 342 342 342 342 342 342 342 342 342 342 342 342 342 342 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 289 87 87

11.8 11.8 12.0 11.8 12.1 12.1 12.3 11.7 12.3 12.3 8.7 12.1 12.0 12.4 12.4 12.0 12.2 0.8 11.9 12.2 12.1 12.2 9.3 12.1 12.3 3.1 12.0 11.7 12.1 12.1 12.0 12.0 12.5 12.1 11.9 11.9 6.9 12.0 12.1 11.9 12.3 11.9 5.8 12.2 12.2 12.2 8.2 12.1 10.4 7.3 5.7 5.7 5.2 5.0 5.2 5.3 5.8 5.3 5.2 5.9 4.8 3.7 4.2 5.0 5.1 5.2 5.5 5.6 5.1 5.2 3.6 3.6 4.1 4.1 5.0

j.5 33 33 30 31 31 31 32 31 31 32 31 32 32 32 32 31 32 31 28 28 27 29 28 28 27 29 35 34 34 36 36 36 36 35 35 36 36 36 36 36 37 36 36 36 36 36 36 30 28 21 21 16 21 18 20 356 315 269 248 199 145 125 125 161 199 234 267 263 216 152 128 89 89 91

c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs

29



Date Time a(UTC)

June 1986 (cont.)

27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 28 28 28 28 28

July 1986

11 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 23 28

*0800 0803 0807 0809 0811 0818 0823 0825 0827 0837 0844 0847 0908 0909

*0936 *1124 *1424 *1558 *1746 *1806 *0008 *0336 *0514 *0702 *1400

*1700 1212 1225 1237

*1250 1258 1313 1323 1330 1401 1404 1414

*1432 1432 1434 1439 1449 1452 1500 1504 1507 1512 1515 1527

*2230 *1825

1830 1845 1900 1913 1920 1922 1924 1933 1941 1952

*1957 2004 2009 2032 2051 2121 2151 2159 2200

*0000 1700

N. deg

15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15

15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15

lat. min

32.65 32.7 32.7 32.7 32.5 32.0 31.7 31.5 31.5 31.7 31.9 32.0 32.8 32.8 33.17 34.28 31.82 31.41 31.84 31.34 31.95 31.94 31.85 31.65 31.55

31.55 32.0 32.0 32.0 31.99 32.0 31.9 31.8 31.8 31.6 31.6 31.5 31.42 31.4 31.4 31.6 32.0 32.1 32.1 32.0 31.9 31.9 32.0 32.0 32.40 32.42 32.5 32.4 31.9 31.4 32.2 32.4 32.5 32.4 32.4 32.4 32.40 32.4 32.3 32.2 32.1 32.0 31.9 31.8 31.8 31.90 32.2

W. deg

58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58

58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58

long. min

42.88 42.7 42.4 42.4 42.3 42.4 42.5 42.6 42.8 44.1 44.9 45.2 47.6 47.7 48.38 45.93 44.40 44.61 44.47 44.52 44.53 44.56 44.59 44.28 43.95

43.95 44.0 44.0 43.9 43.87 43.8 43.7 43.5 43.3 42.0 41.8 41.0 39.89 39.9 39.7 39.5 38.8 38.7 38.6 38.5 38.6 38.7 38.7 38.7 36.46 38.41 38.3 37.1 35.6 34.2 34.0 34.0 34.1 34.7 35.3 36.1 36.46 37.2 37.7 40.1 41.8 44.6 47.3 48.1 48.2 48.60 49.7

Cum. dis. nmi

168.6 168.7 169.0 169.1 169.2 169.8 170.1 170.3 170.5 171.7 172.5 172.8 175.2 175.3 176.1 178.7 181.6 182.0 182.5 183.0 183.6 183.6 183.7 184.1 184.4

184.4 184.9 184.9 185.0 185.1 185.1 185.2 185.4 185.7 187.0 187.1 187.9 189.0 189.0 189.1 189.4 190.2 190.3 190.4 190.5 190.6 190.8 190.8 190.9 193.1 194.9 195.1 196.1 197.7 199.2 199.9 200.1 200.3 200.9 201.5 202.2 202.6 203.3 203.8 206.1 207.7 210.4 213.0 213.8 213.8 214.3 215.4

Actual speed kt

3.6 3.6 3.1 3.9 4.7 4.3 5.0 0.1 7.2 6.9 6.5 6.9 7.0 1.7 1.4 1.0 0.3 0.3 1.5 0.1 0.0 0.1 0.2 0.0 0.0

0.0 0.2 0.5 0.1 0.4 0.5 1.3 1.8 2.6 2.5 4.6 3.7 3.7 4.3 3.9 4.4 2.9 0.8 1.2 2.0 1.8 1.1 0.5 0.3 0.0 1.7 4.3 6.3 6.7 6.4 5.7 4.6 4.3 4.2 4.0 4.2 6.1 6.0 6.0 5.2 5.3 5.3 5.4 5.0 0.2 0.0 3.2

cse deg

78 81

122 177 188 193 225 270 279 284 280 289 287 299

65 149 206

17 186 359 251 198 124 107 90

350 89 91

152 118 136 112 99 98 94 95 95 93 84 59 59 59 75

143 220 268 350 73 80

271 77 91

108 110 15

356 321 268 267 268 271 268 268 267 267 268 267 267 268 283 287 272

Drift speed

kt

1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.4 1.0 0.3 0.3 1.5 0.1 0.0 0.1 0.2 0.0 0.0

0.0 0.0 0.0 0.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.0 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.0 0.0

cse deg

299 299 299 299 299 299 299 299 299 299 299 299 299 299

65 149 206

17 186 359 251 198 124 107 90

350 350 350 350 103 103 103 103 103 103 103 103 80 80 80 80 80 80 80 80 80 80 80 80

271 77 77 77 77 77 77 77 77 77 77 77

283 283 283 283 283 283 283 283 283 287 287

Dead speed kt

5.0 5.1 4.8 5.0 5.5 5.0 4.8 4.7 5.7 5.2 4.9 5.2 5.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0.0 0.2 0.5 0.1 0.1 0.3 1.0 1.5 2.3 2.2 4.3 3.4 3.4 4.0 3.6 4.1 2.6 0.4 1.1 2.2 2.1 1.1 0.2 0.0 0.0 0.0 2.7 4.9 5.4 5.8 5.7 5.6 5.9 5.9 5.7 5.8 5.8 5.8 5.8 5.0 5.1 5.1 5.2 4.8 0.0 0.0 3.2

rec. cse deg

91 93

121 160 171 174 205 260 273 279 274 286 283 500 500 500 500 500 500 500 500 500 500 500 500

500 91 92

153 153 174 115 98 97 93 95 94 94 84 57 57 57 72

157 225 267 334 61

500 500 500 100 118 120

0 339 305 265 264 265 267 267 267 266 266 267 266 266 267 500 500 272

comm.

CC c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN SN SN SN SN SN SN SN SN SN d671

671 c/cs c/cs c/cs ST c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs 672 ST c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs 673 c/cs

30



Date Time a(UTC)

July 1986 (cont.)

28 28 28 28

1730 1800

*1917 1917

August 1986

3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 10 10 10 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15

*0000 1237

*1255 1324 1333 1349 1411 1418 1423 1425 1426 1430 1440 1445 1454

*1513 1524 1541 1542 1123

*1430 1430

*0300 0300 0448 0453 0455 0458 0500 0501 0503 0506 0511 0521 0549 0604 0619 0621 0629 0652 0702 0705 0707 0725 0743 0745 0801 0803 0805 0806 0810 0831 0846 0901 0904 0906 0909 0914 0944 0955 0957 1003 1005 1008 1017 1022 1025 1031

N. deg

15 15 15 15

15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 14 14 14 14 14 14 14 14 14 14

lat. min

32.3 32.3 32.29 32.3

32.29 32.4 32.29 32.0 31.9 31.9 31.8 31.7 31.7 31.6 31.5 31.3 32.1 32.0 31.9 31.77 31.7 31.8 31.8 32.0 31.49 31.5 31.49 31.5 31.1 31.1 31.1 31.0 31.1 31.1 31.1 30.9 30.4 29.2 25.6 23.6 21.5 21.3 20.1 16.5 14.8 14.3 14.0 10.8 7.5 7.2 4.3 4.0 3.7 3.6 3.5 3.4 3.3 3.2 2.9 2.6 2.0 1.1

55.5 53.4 53.0 51.9 51.6 51.3 50.5 50.1 50.1 50.1

W. long. deg

58 58 58 58

58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59

min

51.4 51.2 51.09 51.1

51.09 52.6 51.10 47.8 46.7 45.0 42.7 41.9 41.4 41.2 41.2 41.2 41.3 41.7 42.2 43.01 43.8 45.0 45.1 45.4 42.20 42.2 42.20 42.2 41.1 41.0 41.0 40.8 40.7 40.7 40.8 40.9 41.1 41.7 43.6 44.6 45.7 45.8 46.4 48.1 49.0 49.2 49.3 51.0 52.7 52.8 54.4 54.6 54.9 55.0 55.9 0.7 4.0 7.3 7.9 8.1 8.3 8.1 7.1 6.7 6.7 7.1 7.2 7.4 7.6 7.7 7.6 7.6

Cum. dis. nmi

217.0 217.1 217.3 217.3

217.3 218.7 220.2 223.4 224.5 226.1 228.3 229.0 229.6 229.8 229.8 230.1 230.9 231.3 231.8 232.6 233.4 234.5 234.6 234.9 238.1 238.1 238.1 238.1 239.2 239.3 239.3 239.5 239.6 239.7 239.8 240.0 240.6 241.9 245.9 248.2 250.5 250.8 252.1 256.0 257.9 258.5 258.8 262.4 266.1 266.4 269.6 270.0 270.4 270.6 271.5 276.1 279.3 282.5 283.1 283.5 284.1 285.0 290.7 292.8 293.2 294.4 294.7 295.1 295.9 296.3 296.4 296.4

Actual speed kt

0.3 0.1 0.1 0.0

0.1 4.9 6.7 6.9 6.0 6.2 6.0 6.4 5.5 5.0 4.1 5.0 4.5 3.1 2.6 4.2 4.1 4.3 0.0 1.0 1.0 0.0 0.4 0.6 0.7 1.7 3.4 4.0 3.7 3.9 4.4 6.8 7.7 8.7 9.1 9.4 7.4 9.9 10.2 11.4 11.8 7.8 12.0 12.4 7.3 12.4 11.1 12.4 11.7 12.5 13.2 12.8 13.0 12.4 12.2 11.5 11.0 11.5 11.4 11.8 11.9 9.8 7.3 5.6 4.4 2.1 0.3 0.4

cse deg

90 89 90 90

273 93 96 92 92 93 93 93 118 154 185 352 260 260 258 268 272 275 303 99 99 90 296 108 102 101 114 83 349 269 203 204 206 206 206 206 207 205 205 206 206 207 206 207 209 207 214 222 246 266 269 268 268 244 215 193 172 169 169 190 200 199 197 198 197 121 112 240

Drift speed kt

0.0 0.0 0.0 0.0

0.1 0.1 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4

cse deg

287 287 90 90

273 273 103 103 103 103 103 103 103 103 103 103 103 103 103 303 303 303 303 303 90 90 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296 296

Dead speed kt

0.3 0.1 0.1 0.0

0.0 5.0 5.0 5.2 4.3 4.6 4.3 4.7 3.9 4.1 4.2 5.8 6.2 4.7 4.2 4.2 4.1 4.3 0.0 1.0 1.0 0.0 0.0 1.0 1.1 2.0 3.8 4.3 3.5 3.6 4.4 6.8 7.7 8.7 9.1 9.4 7.4 9.9 10.2 11.4 11.8 7.8 12.0 12.4 7.3 12.4 11.1 12.3 11.5 12.2 12.8 12.4 12.6 12.2 12.2 11.6 11.2 11.7 11.6 11.9 11.9 9.8 7.3 5.6 4.5 2.5 0.7 0.3

rec. cse deg

90 90 90 500

500 93 93 89 88 89 89 89 125 173 209 336 266 268 268 268 272 275 500 99 99 500 500 111 107 104 114 86 354 266 198 201 203 204 204 204 204 203 203 204 204 204 204 205 206 205 212 220 245 265 268 267 267 243 213 191 170 168 168 188 198 197 194 194 192 120 114 177

comm.

c/cs c/cs 674 c/cs

674 c/cs ST c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs 675 c/cs c/cs c/cs c/cs 676 c/cs 676 c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs

31



Cum. Time N. lat. W. long. dis.

Date a(UTC) deg min deg min nmi

August 1986 (cont.)

15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 16 16 16 16 16 16 16 16 16 16

Previous

*1036 1043 1100 UIO 1123 1146 1148 1150 1159 1213 1214 1216 1220 1247 1317 1347 1417 1429 1438 1448 1518 1548 1609 1616

*1618 1618 1643 1700 1703

*1722 1737 1744 1809 1839 1909 1922 1935 2003 2032 2049 2119 2137 2207 2229 2257 2320 2331 2339 0000 0009 *0110 0200 *0300 0300 0900 *1410 *1654 *2326

14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13

accum. miles 0.

50.04 50.1 50.2 49.5 48.4 46.5 46.4 46.3 46.5 46.8 46.8 46.6 46.4 44.1 41.6 39.1 36.6 35.6 34.8 33.9 31.4 28.8 27.0 26.3 26.21 26.2 24.1 22.7 22.5 20.94 19.6 19.0 16.8 14.2 11.6 10.4 9.3 6.8 4.3 2.8 0.1 58.5 55.8 53.8 51.3 49.2 48.3 47.6 46.0 45.3 40.49 35.7 30.15 30.1 3.1 6.69 6.54 6.32

present

59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59 59

accum.

7.63 7.7 7.7 8.1 8.6 9.6 9.7 9.9 11.0 12.6 12.7 12.8 12.9 13.8 14.9 16.0 17.1 17.6 17.9 18.3 19.4 20.5 21.3 21.6 21.68 21.7 22.7 23.4 23.5 24.27 24.8 25.1 25.8 26.7 27.6 28.0 28.4 29.2 30.1 30.6 31.5 32.1 33.0 33.6 34.5 35.2 35.5 35.8 36.3 36.6 38.23 40.1 42.35 42.4 44.2 38.96 36.40 37.79

296.5 296.5 296.6 297.4 298.6 300.7 300.9 301.1 302.1 303.7 303.9 304.0 304.3 306.7 309.4 312.1 314.9 316.0 316.9 317.8 320.6 323.4 325.4 326.0 326.2 326.2 328.5 330.0 330.3 332.0 333.4 334.1 336.4 339.2 341.9 343.1 344.3 346.9 349.6 351.2 354.0 355.7 358.5 360.6 363.3 365.4 366.5 367.2 368.9 369.6 374.7 379.8 385.8 385.8 412.8 419.1 421.6 423.0

dist. 422.951

a UTC = Universal Coordinated Time c/cs = change of course

c SN = satellite navigation Site number

* Satellite navigation time.

Actual Drift Dead rec. speed cse speed cse speed cse kt deg kt deg kt deg comm,

0.4 0.4 4.4 5.6 5.6 5.7 5.8 6.7 7.1 6.4 4.6 4.5 5.4 5.4 5.4 5.5 5.5 5.7 5.7 5.5 5.6 5.6 5.7 4.6 4.5 5.5 5.4 5.3 5.4 5.7 5.6 5.5 5.6 5.5 5.5 5.5 5.6 5.5 5.6 5.6 5.7 5.7 5.6 5.7 5.6 5.6 5.3 4.8 4.8 5.0 6.2 6.0 4.3 4.5 1.2 0.9 0.2 0.2

313 318 207 206 206 225 256 282 281 248 200 194 202 203 203 203 204 203 204 203 203 204 203 205 208 205 206 206 206 202 201 198 198 198 198 198 198 198 199 198 198 198 198 198 198 198 198 199 199 199 201 201 183 184 55 93 261 261

0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.9 0.9 0.9 0.9 0.9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 1.1 1.1 1.2 1.2 1.2 0.9 0.2 0.0

334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 334 329 329 329 329 329 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 325 239 239 55 55 55 93 261 0

0.3 0.3 4.8 6.0 6.0 5.9 5.7 6.3 6.7 6.4 5.1 5.0 5.9 5.9 5.8 6.0 5.9 6.2 6.2 6.0 6.1 6.1 6.1 5.0 5.0 6.1 6.0 5.9 6.0 6.0 5.9 5.9 6.0 5.8 5.8 5.8 5.9 5.9 5.9 6.0 6.1 6.0 5.9 6.1 6.0 6.0 5.7 5.2 5.2 5.3 5.3 5.2 5.2 5.3 0.0 0.0 0.0 0.0

177 175 201 201 201 219 249 277 276 242 195 189 197 198 198 198 199 198 199 198 198 199 198 199 199 198 198 198 198 198 197 194 194 194 194 194 194 194 195 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 500 500 500 500

SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs SN c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs c/cs SN c/cs SN c/cs c/cs SN SN SN

32


15°40'N

15°20'

15°00' -

14°40' -

14°20' -

1 4 W

13°40' -

13°20' -

13°00'

I I

JD 227 / / 1123 UTC,/ /

1220 UTC-^# /

1618 UTC / I 1643 UTC J /-178

_ 1722 UTC -f /

1839 UTC-/ /

2032 UTC J j

2229 UTC-/ /

JD228/ / / 0009 -/228/ UTC/ 7

I \ !'• % Barbados

I vA?177 \

S i T i

l

y j 227

I

-

-

-

59°51 'W 59°31' 59°11' 58°51' 58°31'

Figure 1. Track chart of JOIDES Resolution during Leg 110. Bold portion of track indicates navigation for seismic line 7.

33


58°54'W 58°52' 15°36'N

15°34'

58°50' 58°48' 58°46' 58°44' 58°42' 58°40' 1 1—

58°38' 58°36' 58°34'

15°32'

15°30'

15°28'

15°26' 15°34'

15°32'

15°30' 15°34'

15°32'

15°30' 15°34'

15°32'

215 674

r Seismic line 1

,674

0908 UTC 0654 UTC

673

S1 0712 UTC

675/ 676

0825 UTC

672,

1 J D 1 78/0613 UTC

I

Seismic line 3

• 6 7 4

I

I I

673 *" 2159 UTC

I I

I

671

2121 UTC

I

I

• 675

I

I

* 6 7 6

I

I

672

2032 UTC

I

I I

J D 203/1924 UTC

1957 UTC

I I

I Seismic line 5

# 6 7 4

I

I

673 •

I

I I

JD215/ 1337 UTC

1541 UTC

I I

671 6 7 ( j ^ 1 4 4 0 UTC

675 1411 UTC \

1 1

1 1

# 6 7 2

1 1

1

1 15630' 58°54'W 58°52' 58°50' 58°48' 58°46' 58°44' 58°42' 58°40' 58°38'

Figure 2. Detailed navigation and site locations of ODP Leg 110 operations and track lines of seismic lines 1, 3, and 5.

58°36' 58°34'

34


Table 2. Recording, processing, and display parameters of Leg 110 site survey seismic lines.

Location

Water-gun source Amplifier gain (dB)

Predictive deconvolution Prediction distance (ms): Filter length (ms): % white noise added:

AGC* Response time (ms) Start time (ms) % Gain

Zero-Phase Band-Pass Filter

Low cut (Hz) Taper width High cut (Hz) Taper width

Trace Mixing Number of traces

mixed by:

Trace Equalization Response distance

(trace) Equalizing:

Line 1

Survey of Site 671

Line 3

Survey of Sites 671, 672, 673

Recording Parameters

Two 80 in.3 85

One 400 in.3 85

Processing Parameters

20 220

1

400 6300

100

35 20

125 20

3 Addition

100 Amplitude

25 300

1

400 6000

100

35 20

125 20

3 Addition

100 Amplitude

Line 5

Survey of Site 675

Two 80 in.3 85

30 200

1

400 6400

100

35 20

125 20

3 Addition

100 Amplitude

Line 7

Survey departing Site 676 to Port

Two 80 in.3 70-80

400 variable

100

35 20

125 20

Plotter

Data Window from (ms) to (ms)

Display Parameters

Versatec Versatec

6300 9000

5800 8000

Versatec Versatec

6000 variable 9000 variable

Automatic gain control

35

JD 178 heading 20° C/C 124° C/C 266° (0613 UTC) (0654 UTC) (0712 UTC) SP 1166 SP 1365 SP 1455

Site 671 S/N C/C 170° C/C 270° Beacon drop JD 178

(0752 UTC) (0811 UTC) (0825 UTC) JD 178/(0845 UTC) (0908 UTC) SP 1656 SP 1750 SP 1825 SP 1921 SP 2035

I I I I ^614 ^634 1654 ^674 ^694 ^714 ^734 1754 1774 U94 ^814, ^834 1854 1874 1894 1914 1934 1954 1974 1994 2014 S

Figure 3. Leg 110 seismic line 1, ship approaching Site 671. Vertical exaggeration approximately 5.5.


JD 203 heading 265° (1924 UTC) SP 57

Site 672 Beacon

(1957 UTC) SP 219

(2032 UTC) SP 395

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11 Figure 4. Leg 110 seismic line 3, ship crossing Sites 672 and 671, and approaching Site 673. Vertical exaggeration approximately 5.5.

38


Site 671 JD 203 (2113 UTC) (2121 UTC)

SP 600 SP 640 582

(2159 UTC) SP 830

Figure 4 (continued).

39


JD 215 heading 89° C/C 266° (1337 UTC) (1349 UTC) (1411 UTC) (1440 UTC) SP 4250 SP 3992 SP 4102 SP 4250 | I I I

3952 3972 3992 4012 4032 4052 4072 4092 4112 4132 4152 4172 4261

Figure 5. Leg 110 seismic line 5, ship approaching Site 675. Vertical exaggeration approximately 5.5.

40


Site 675 Beacon drop (1513 UTC)

SP 4412 (1541 UTC)

SP 4554

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(1220 UTC) SP 337

I 251 271 ,291 ,311 33,1 351 ,371

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391 ;411

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(1347 UTC) SP 772

(1417 UTC) SP 922

731 751 771 791 811 831 851 882 902 922 942 962 982 1002 1022 1094


(1518 UTC) SP 1227

1114 1134 1154 1174 ,1194 ,1214 1234 1254 1274 1294 1314 1334 1354 1374 1394


45


(1643 UTC) SP 1652

1414 ,1434 1454 ,1474 .1529 .1549 1569 1589 1609 1629 1649 1669 1689 1709 1729 1749 sjraiiiiR

ti A



(1839 UTC) SP 1769

1472 ,1492 1512 1532 ,1552 1572 1592 1612 1632 1652 1672 1692 1712 1732 1752


47


(1839 UTC) SP 1769

1779 1799 1819 1839 1859 1879 1899 1919 1939 1959 1979 1999 2019 2039 2059


48


(2032 UTC) SP 2334

2103 2123 2143 2163 2183 2203 2223 2243 2263 2283 2303 2323 2343 2363 2383 2403


49


2423 2443 2463 2483 2503 2523 2543 2563 2583 2603 2623 2643 2663 2683 2703 2723

4.0

4.5

5.0

5.5

6.0

6.5

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(2229 UTC) SP 2919

2743 2763 2783 2803 2823 2843 2863 2883 2903 3065 3085 3105 3125 3145


51


JD227 (2229 UTC)

SP 2919

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1 2919 3081

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52


JD228 (0009 UTC)

SP 3419


53

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