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USGS CMG Z-2-07-SC Metadata

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ID Z-2-07-SC
Also Known As MBARI ID 290
Dana Point Exped.
Abstract Monterey Bay Aquarium Research Institute,United States Geological Survey, Menlo Park, California. Chirp and Multibeam Sonar data of field activity Z-2-07-SC in Offshore Orange County, CA from 07/09/2007 to 07/16/2007
Organization Monterey Bay Aquarium Research Institute
United States Geological Survey, Menlo Park, California
Project/Theme Gas Hydrates
Activity Type Chirp and Multibeam Sonar
Platform Zephyr
Area of Operation Offshore Orange County, CA, Southern California
Bounding Coordinates
33.50748
-118.10279    -117.63450
33.17458
Ports LEAVE Moss Landing, CA
ARRIVE Moss Landing, CA
Dates 07/09/2007 (JD 190) to 07/16/2007 (JD 197)
Analog Materials No analog holdings.
Information Specialist
Ray Sliter (USGS)
Crew
David Caress Chief Scientist, MBARI
Ray Sliter Scientist, USGS
Hans Thomas AUV operations, MBARI
Doug Conlin AUV operations, MBARI
Aaron Gregg Zephyr crew (Master), MBARI
Matthew Noyes Zephyr crew (Engineer), MBARI
Paul Ban Zephyr crew (Mate), MBARI
Perry Shoemake Zephyr crew (Mate), MBARI
Purpose
Six AUV dives planned in the California
Borderland, located offshore between Newport, CA and San Mateo Point.
Three primary targets: 1) Deformed sediments over the San Mateo Thrust west of
San Mateo Point; 2) Palos Verdes Fault Zone/ San Gabriel Canyon west of
Newport; 3) area near Coronado Bank Fault zone, faulted strata and possible
hydrate target. The areas mapped are in water depths of 250 to 850 m. The
primary objective of these dives is to obtain multibeam bathymetric data and
high-resolution subbottom profiles. Processing and analysis of this data will
be used to identify target sites for core sampling related to active faulting
in order to determine the time of the most recent fault movement and for
sedimentary architecture related to methane gas discharge and hydrate formation.
Summary
Local times used; (July 9  JD 190)

~1700/JD190 R/V Zephyr departs Moss Landing.
~2100/JD191 R/V Zephyr arrives Ocean Institute, Dana Point.
~1534/JD192 Begin first AUV dive off of San Mateo Point
~1756/JD192 Abort first AUV dive off of San Mateo Point
~2137/JD192 Begin second AUV dive off of San Mateo Point
~0651/JD193 End second AUV dive off of San Mateo Point
~1241/JD193 Begin third AUV dive off of San Mateo Point
~2123/JD193 End third AUV dive off of San Mateo Point
~0354/JD194 Begin first AUV dive over Palos Verdes Fault
~1232/JD194 End first AUV dive over Palos Verdes Fault
~1832/JD194 Begin second AUV dive over Palos Verdes Fault
~0330/JD195 End second AUV dive over Palos Verdes Fault
~1328/JD195 Begin first AUV dive over suspected methane hydrate occurrences
~2227/JD195 End first AUV dive over suspected methane hydrate occurrences
~0345/JD196 Begin second AUV dive over suspected methane hydrate occurrences
~1245/JD196 End second AUV dive over suspected methane hydrate occurrences
~1500/JD196 R/V Zephyr returns Ocean Institute, Dana Point.
~1530/JD196 R/V Zephyr departs Ocean Institute, Dana Point.
~1900/JD197 R/V Zephyr arrives in Moss Landing
A total of 6 AUV dives were successful and one was aborted. The first dive was aborted because the AUV was erroneously programmed to ascend for a GPS fix after every line. The AUV's starting position was determined by GPS at the launch site. The vehicle then dives in a USBL-nav-aided spiral to 50 meters above the seafloor. The AUV can survey with the multibeam sounding system and chirp sonar for ~9 hours; it then returns to the sea surface to be picked by the R/V Zephyr. All three of the planned surveys (all six dives) were completed. A typical AUV dive will result in 35 to 40 km of survey trackline with a line spacing of 150 m. The total survey trackline for the Borderland operation was approximately 250 km.
Notes
MBARI's automated underwater vehicle (AUV) for sea-floor mapping and
subbottom profiles. The AUV has a high-resolution Edgetech chirp sonar
profiling system and a multibeam sounding system and uses both Doppler sonar
tracking of the sea floor and an inertial guidance system for position
control.  The AUV descends to 50 m above the seafloor with USBL-nav-aided spiral 
descent.
Got Help? For Z-2-07-SC, we would appreciate any information on -- analog materials, chief scientist, contract, days at sea, dive count, equipment used, funding, information to be derived, kms of navigation, national plan, NGDC Info, owner, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
Type Webpage KMZ Arc         Metadata        
Metadata data     txt  data  FAQ  xml
Navigation data nav    
Seismic data chirp.seis    
Times   060.times    

Z-2-07-SC location map of where navigation 

equipment operated
Z-2-07-SC location map of where navigation 

equipment operated

 
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