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USGS CMG Z-1-06-SC Metadata Skip navigational links Search InfoBank     Activities: by ID   by Platform   by Year   by Region   by Participant   by Organization   by Project/Theme   with Incomplete IDs   Disclaimer   Activity First Letter: A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   0   1   2   3   4   5   6   7   8   9   Virtual Globes: Atlas  (GE)    Samples  (GE)    Illuminate Oceans  (GE)    Earthquakes  (GE)    Get GE    InfoBank examples Z-1-06-SC links... Metadata & Data: Metadata   Navigation   Seismic   chirp.seis (GE GM)   nav (GE GM)   seis (GE GM)   Formal Metadata: Frequently-Anticipated Questions   Outline   Parseable Text   XML       Metadata ID Z-1-06-SC Abstract Monterey Bay Aquarium Research Institute,United States Geological Survey, Menlo Park, California. Chief Scientists: David Caress, MBARI, Charlie Paull, MBARI. Sea-floor mapping with an automated underwater vehicle (AUV) data (AUV) of field activity Z-1-06-SC in southern Santa Monica Basin from 06/04/2006 to 06/10/2006 Organization Monterey Bay Aquarium Research Institute United States Geological Survey, Menlo Park, California Chief Scientist David Caress Charlie Paull Activity Type Sea-floor mapping with an automated underwater vehicle (AUV) Platform Zephyr Area of Operation southern Santa Monica Basin Location map Bounding Coordinates 33.86089 -118.82239    -118.53330 33.71375 Ports LEAVE Moss Landing, CA ARRIVE Moss Landing, CA Dates 06/04/2006 (JD 155) to 06/10/2006 (JD 161) Analog Materials No analog holdings. Index map Information Specialist Bill Normark (USGS) Crew Charlie Paull David Caress Bill Ussler Rendy Keaton Bill Normark Duane Thompson Doug Conlin Hans Thomas Paul Ban Aaron Gregg Matt Noyes Equipment Used AUV Purpose Five AUV dive days were planned in Santa Monica Basin offshore Los Angeles, CA. The primary targets were a mud volcano from which methane hydrate was cored in 2003 (see USGS cruise A-1-03-SC) and giant scour depressions (2 km wide) had been imaged on USGS multibeam data in the upper reach of the Redondo fan valley. The areas mapped are in water depths of 650 to 850 m. The primary MBARI objective of these dives was to determine the shallow structure and shape of the mud volcano. In addition, the USGS project interests were to determine the form and sedimentary structure of the fan valley floor in the area of the giant scours. Both of the these target areas had been photographed and sampled using the MBARI ROV Tiburon during cruise W-1-05-SC. Information to be Derived Very high-resolution bathymetry and subbottom structure in the deeper part of Santa Monica Basin. Bathymetric maps are produced at a one-meter contour interval. Summary 1200/JD155 R/V Zephyr departs Moss Landing. ~1500/JD156 Begin first AUV dive on outer shelf in Santa Monica Bay ~0100/JD161 Complete final AUV Dive near ODP Site 1015 ~0600/JD162 R/V Zephyr arrives in Moss Landing A total of 5 AUV dives were completed. Each dive was initiated on the outer shelf edge in Santa Monica Bay so that the AUV's starting position could be determined by GPS at the launch site. The vehicle then drives to the pre-planned survey site by tracking the sea floor with the Doppler sonar log. The AUV can survey with the multibeam sounding system and chirp sonar for about 8 to 9 hours; it then returns to the sea surface to be picked by the R/V Zephyr. The expedition consisted of two separate operations and separate scientific parties. The R/V Zephyr would launch the AUV in early morning and then wait to retrieve the vehicle after it finished mapping. The R/V Zephyr would then dock at Marina del Rey around early evening where the data would be transferred to a server in a temporary field office established in an apartment adjacent to the marina. The second scientific party would then process the data until about 0100, at which time the trackline for the next survey would be set and prepared to load into the AUV. All primary objectives of the cruise were attained. Notes MBARI's automated underwater vehicle (AUV) for sea-floor mapping. The AUV has a high-resolution Edgetech chirp sonar profiling system and a mult ibeam sounding system and uses both Doppler sonar tracking of the sea floor and an inertial guidance system for position control. The AUV surveys are conducted about 60 m above the sea floor. Got Help? For Z-1-06-SC, we would appreciate any information on -- crew, information to be derived, equipment used, information specialist, project, publications, purpose, summary. Skip footer navigational links InfoBank   Menlo Park & Santa Cruz Centers   St. Petersburg Center   Woods Hole Center   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer

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U.S. Department of the Interior | U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/z/z106sc/html/z-1-06-sc.meta.html Page Contact: InfoBank staff Page Last Modified: Tue Jul 1 07:24:16 PDT 2008  (wcs)