| Data provider |
Three donated AUV cruises were conducted aboard the MBARI R/V Rachel Carson from 25-28 April 2018, 14-19 March 2019, and 10-11 May 2019. These surveys targeted channel, pockmark, and structural features in the CalDIG (California Deepwater Investigations and Groundtruthing) study region. A total of 20 AUV dives between the three cruises were conducted. The MBARI AUV carries a Reson 7125, a 400 kHz multibeam sonar system, and an Edgetech 1-6 kHz Chirp sub-bottom profile system (e.g., Caress et al., 2008). The 20 AUV surveys contain coincident ultrahigh-resolution multibeam bathymetry and low-altitude Chirp data. During multibeam acquisition, Chirp tracklines were conducted parallel to multibeam contours and tied together with widerspaced crossing lines. All data were processed by MBARI technicians. AUV bathymetric data were generally gridded to ~1 m cell size, and Chirp sub-bottom profile data were altitude corrected. AUV bathymetry and Chirp data will available for download via a USGS data release in spring of 2021. |
