Seismic Reflection/Refraction Data at the Academic Seismic Portal
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Robert D. Conrad
Raw
Acquisition Information
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Seismic:Reflection:MCS (Repository unknown)
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Platform Info
Array:Robert D. Conrad
LDEO
Device Info
Seismic:
LDEO
Locale
File Format
NotProvided
Quality
0
Buhl, Peter
LDEO
Event Logs
Device Info
Seismic:
LDEO
Platform: Robert D. Conrad (Array)
Seismic:
Platform: Robert D. Conrad (Array)
Watts, Anthony
University of Oxford
Seismic Acquisition Parameters
RC2308_ACQ001 (Lines: All)
Source Information
AirGun (BOLT:1500C)
Source Number: 4
Volume (cu in): 1864
Pressure (psi): 2000
Distance to Near Channel (m): 300
Distance to Antenna (m): 40
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 48
Channels Recorded: 48
Group Spacing (m): 50
Cable Depth (m): 45
Near Channel Number: 48
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
Acquisition System
Digital
Name: DFSIV
Sample Interval (msec): 4
Details
Group Spacing=50,100, 50,100,... meters For this cruise the streamer had the following spacing: 2 50m actives followed by a 50m dead section, so 48 channels over 3500m.
(i.e. trace offset
48 300
47 350
46 450
45 500
44 600
43 650
42 750
. .
. .
. .
Antenna to Source (Kana Keoki)=74 meters
Source Volume (Kana Keoki)=1920 cu. in.
Source Pressure (Kana Keoki)=2000 psi
Source Depth (Kana Keoki)=UNKNOWN meters
Shot Control (Kana Keoki)=Time: Every minute on the half minute for Constant Offset Lines. For these lines the the Kana Keoki was in front of the Conrad. The distance between the two ships was measured by Miniranger and Raydist. Each COP line was shot twice using two ship separations: 3.6 and 16 km. Airgun and Explosive ESPs (Expanding Spread Profiles) were also shot during this cruise.
Ship Distances for COP lines:
Line COP Distance
301 A 3.6
303 cdp/esp/cop 3.6
304 B 16.0
305 cdp/esp/cop 3.6
306 C 16.0
307 cdp/esp/cop 3.6
308 D 16.0
310 cdp/esp/cop 3.6
311 E 18.0
313 E 3.6
314 F 3.6
316 cdp/esp/cop 3.6
317 G 16.0
319 cdp/esp/cop 3.6
320 H 16.0
322 cdp/esp/cop 3.6
323 I 16.0
325 cdp/esp/cop 3.6
326 J 3.6
327 cdp/esp/cop 3.6
328 K 3.6
CDP lines (Conrad only)
329
330
331
332
edu.utexas.ig:rc2308_acq001 (Lines: )
Source Information
AirGun
Receiver Information
Hydrophone:Streamer
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
US Navy Transit Satellite
WGS72
Acquisition System
Digital
Name: DFS IV
Details
Receiver Type: Hydrophone_Streamer
Source Type: SeismicSource_Gun_Air
Acquisition System Name: DFS IV
Acquisition System Type: digital
Seismic Nav System: US Navy Transit Satellite
Survey Datum: WGS72
Source to Near Channel (m): 300
Antenna to Source (m): 40: <i>Conrad</i>; 74: <i>Kana Keoki</i>
Number of Channels Recorded: 48
Channel Length (m): 50;100; 50;100;
: For this cruise the streamer had the following spacing: 2 50m actives followed by a 50m dead section; so 48 channels over 3500m.
Cable Receiver Depth (m): 13.7-15.2
Source Volume (cubicInches): 1864: <i>Conrad</i>; 1920: <i>Kana Keoki</i>
Source Pressure (bars): 138
Source Number: 4 (<i>Conrad</i>)<br>3 (<i>Kana Keoki</i>)
Source Depth (m): unknown (<i>Conrad</i>)<br>unknown (<i>Kana Keoki</i>)
Shot Control: time
Shot Interval (s or m): 20: <i>Conrad</i>: Time: Every minute on the half minute for Constant Offset Lines. At 20 second intervals for the single ship cdp lines 329-332.<br><i>Kana Keoki</i>: Time: Every minute on the half minute for Constant Offset Lines. For these lines the the <i>Kana Keoki</i> was in front of the <i>Conrad</i>. The distance between the two ships was measured by Miniranger and Raydist. Each COP line was shot twice using two ship separations: 3.6 and 16 km. Airgun and Explosive ESPs (Expanding Spread Profiles) were also shot during this cruise.
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: no
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