Open-File Report 00-321: Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998

Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998

Sidescan Surveying System

A Klein 2000 sidescan system was used for geophysical surveying. The unit features 8 channels of processed data, 7 subsurface from the towfish (5 sonar and 2 instrumentation) and 1 surface (external analog input). Two sonar channels each were devoted to 100 KHz and 500 KHz sidescan data and a fifth sonar channel was used for 4 KHz subbottom profiling. The resolution of the profiler data is approximately 0.15 m of sub-bottom thickness (penetration of tens of meters is typical in unconsolidated sediment).

A Triton Elics Isis brand side-scan data recording system was used on the cruise. The Isis system simultaneously records 5 channels of data; port and starboard 100 KHz side-scan data, port and starboard 500 KHz side-scan data, and profiler data. Side-scan data shown in this report are 100 KHz data. Typically, 2048 samples were recorded per channel over a swath width of 400 m yielding a pixel size of 0.1 m of seafloor area for the side-scan data.

Top of Page

For more information, contact the PCMSC team.

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Suggested citation:

Cochrane, Guy R., and Lafferty, Kevin D., 2000, Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998: U.S. Geological Survey Open-File Report 00-321, https://pubs.usgs.gov/of/2000/0321/.

U.S. Department of the Interior
SALLY JEWELL, Secretary

U.S. Geological Survey
Suzette M. Kimball, Acting Director