Abstract:

Five autonomous underwater vehicle (AUV) missions collecting multibeam data, subbottom profiles, and photo surveys in northern Gulf of Mexico lease blocks GC600 and AT357. Data were collected using AUVs Mola Mola and Eagle Ray as part of R/V Pelican cruise PE-13-26, September 2-8, 2012.

Suggested Citation:

Arne Diercks. 2016. R/V Pelican: PE13-26 - Raw AUV: Multibeam, Sub Bottom Profiler, Images - Gulf of Mexico May 6–15, 2013. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7VM49B3

Publications:

Diercks, A.-R., Macelloni, L., D’Emidio, M., Lucker, S., Woolsey, A., & Woolsey, M. U. (2018). High-resolution seismo-acoustic characterization of Green Canyon 600, a perennial hydrocarbon seep in Gulf of Mexico deep water. Marine Geophysical Research. doi:10.1007/s11001-018-9374-3

Johansen, C., Macelloni, L., Natter, M., Silva, M., Woosley, M., Woolsey, A., … MacDonald, I. R. (2020). Hydrocarbon migration pathway and methane budget for a Gulf of Mexico natural seep site: Green Canyon 600. Earth and Planetary Science Letters, 545, 116411. doi:10.1016/j.epsl.2020.116411

Purpose:

Major objectives for this cruise were to acquire Multibeam Echo Sounder mapping and Sub Bottom Profiler data with the Eagle Ray AUV, and digital photo mosaics of bottom conditions at 2 of the main ECOGIG sites, GC600 and AT357 with the Mola Mola AUV.

Data Parameters and Units:

Multibeam ecosounder (MBES): XYZ data of latitude (decimal degrees) longitude (decimal degrees) and depth (m) Date (MM/DD/YYYY), Time (UTC), area (km^2)

Methods:

Multibeam ecosounder (MBES): in *.all format; CHIRP subbottom profiler: vertical profiles of sub bottom strata in GeoAcoustics *.gcf format and Seg-Y *.sgy format; Seafloor profiling camera: Raw files *.pgm format with RGGB bayer pattern. and Color corrected *.jpg files. Sub Bottom Profiler data in binary GeoAcoustics GCF condensed format (.gcf) can be read and converted to open standard SEG-Y (.sgy) format by commercial software packages including SonarWiz. As some information in the GCF format is lost in the conversion to SEG-Y, raw data is provided in GCF format. Raw multibeam (MBES) data in Kongsberg ALL format (raw.all) can be read by the commercial software packages CARIS, Fledermaus, and the open source MB System. The earlier photos in the dataset were taken automatically by the AUV before it started the survey. Accordingly, these don't have any associated navigation information. Metadata files for specific AUV missions included.

Instruments:

Kongsberg EM2000; GeoAcoustics polarity preserving chirp sub-bottom profiler; Allied Vision Technologies Prosilica GC1380C, with 9mm lens

Individual Files: