Dataset description: Backscatter B [7125]--Offshore of Tomales Point, California

The acoustic-backscatter map of the Offshore of Tomales Point map area, California, was generated from backscatter data collected by California State University, Monterey Bay (CSUMB), by Fugro Pelagos, and by the U.S. Geological Survey. Mapping was completed between 2004 and 2010, using a combination of 200-kHz and 400-kHz Reson 7125, and 244-kHz Reson 8101 multibeam echosounders, as well as 234-kHz and 468-kHz SEA SWATHPlus phase-differencing sidescan sonars. These mapping missions combined to collect backscatter data from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters.

Version	1
Keywords	sea-floor characteristics, multibeam sonar, sidescan sonar, image mosaics, sea-floor acoustic reflectivity, marine geophysics
Data types	Multibeam
Format	GeoTIFF;
Amount	3.4 MB

Contacts

Contact	Peter Dartnell PCMSC_data@usgs.gov

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Location of materials and files

Public files	https://pubs.usgs.gov/ds/781/OffshoreTomalesPoint/data/BackscatterB_7125_OffshoreTomalesPoint.zip https://pubs.usgs.gov/ds/781/OffshoreTomalesPoint/data_catalog_OffshoreTomalesPoint.html https://doi.org/10.3133/ds781
Metadata	https://cmgds.marine.usgs.gov/metadata/pcmsc/SeriesReports/DS_DDS/DS_781/TomalesPoint/BackscatterB_7125_OffshoreTomalesPoint_metadata.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
F105TB	Reson Seabat 7125 Multibeam Echo Sounder Reson Seabat 7125 Multibeam Echo Sounder 200 kHz and 400 kHz