Koslow, J. Anthony (2016). CalCOFI 1101NH Cruise Data. In California Cooperative Oceanic Fisheries Investigations (CalCOFI): Acoustic and Trawl Data. UC San Diego Library Digital Collections. https://doi.org/10.6075/J05D8Q6J

• 2011-01-12 to 2011-02-06

• 2016

• Koslow, J. Anthony

• California Cooperative Oceanic Fisheries Investigations

• RV New Horizon

Acoustic backscattering data were collected between stations using a hull-mounted Simrad EK60 split-beam echo sounder equipped with five frequencies (18, 38, 70, 120, and 200kHz). The EK60 was calibrated before each cruise using the standard sphere method (Foote et al., 1987). Pulse length was set to 1.024ms with a ping rate of 0.5s_1. Beam angles were 71 for the 38kHz transducers and111 for the 18 kHz. Power for both 18 and 38kHz transducers was 2kW. As the three highest frequencies did not reliably penetrate to the depth of the daytime deep scattering layer (DSL) at the vessel transit speed (10knot), they were not used in this study. Acoustic data were processed and noise removed using Echoview software. Nautical area scattering coefficient (NASC) was calculated over 100m distance segments by 5m depth intervals. See Davison et al. (2015) for further details of acoustic data analysis methods.

• CalCOFI 1101NH

Polygon: 35.5,-124.5 35.5,-117 29.5,-117 29.5,-124.5

• data

• English

Doi: https://doi.org/10.6075/J05D8Q6J

Software

• Echoview (echoview.com)

Other resource

• Cruise Information: https://www.calcofi.com/index.php?option=com_content&view=category&id=116&Itemid=485
• Simrad EK60 Scientific echo sounder (proprietary product): https://www.kongsberg.com/maritime/products/ocean-science/ocean-science/es_scientific/simrad-ek60/
• Vessel Information: https://www.calcofi.com/index.php?option=com_content&view=category&layout=blog&id=166&Itemid=988

Creative Commons Attribution 4.0 International Public License

• UC Regents

Under copyright (US)

Use: This work is available from the UC San Diego Library. This digital copy of the work is intended to support research, teaching, and private study.

Constraint(s) on Use: This work is protected by the U.S. Copyright Law (Title 17, U.S.C.). Use of this work beyond that allowed by "fair use" or any license applied to this work requires written permission of the copyright holder(s). Responsibility for obtaining permissions and any use and distribution of this work rests exclusively with the user and not the UC San Diego Library. Inquiries can be made to the UC San Diego Library program having custody of the work.

Research Data Curation Program, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/rdcp)

2023-07-14