Multibeam bathymetry raw data (Kongsberg EM 122 working area dataset) of RV MARIA S. MERIAN during cruise MSM82/2, South Atlantic Ocean

• Main Authors: Krastel, Sebastian, Lenz, Kai-Frederik, Cremanns, Maximilian, Düring, Annelie, Schopenhauer, Mila, Vietheer, Christian, Kinne, Stefan
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (Media Type); Comment; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; Event label; File content; Kongsberg datagram raw file name; LATITUDE; LONGITUDE; Maria S. Merian; MSM82/2; MSM82/2_0_underway-6; Number of pings; Ship speed; Start of data file; depth; heading; Start of data file recording; Stop of data file; Stop of data file recording; Swath-mapping system Simrad EM122 (Kongsberg Maritime AS); Kongsberg; Las Palmas; Uruguay; South Atlantic Ocean
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.956743; https://doi.org/10.1594/PANGAEA.956743

The multibeam echo sounder (MBES) data was collected from the 28.04.2019 (23:19 UTC) to the 07.05.2019 (16:42 UTC) with a Kongsberg EM122 during the transit from Montevideo (Uruguay) to Las Palmas (Canary Islands, Spain) in the Southern Atlantic Ocean. The deep-water MBES EM122 operates with an acoustic frequency of 12 kHz and a beam opening angle of 2° x 2° and up to 432 beams. The raw and unprocessed bathymetric and backscatter data is stored in Kongsberg format (*.all), each containing up to 30 min of data. The therein included time, motion and position data (WGS84, geographic) was measured by the Kongsberg Seapath system on board. During the acquisition the echo sounder was monitored as well as settings and filter adjusted according to the environment. The swath opening angle was set between 65° and 70°. As the data was collected during transit, no specific survey was performed. Sound velocity profiles (SVP) were measured on the 01.05.2019 (XSV probe) and 04.05.2019 (with CTD) and applied in the MBES acquisition software SIS. The SVP data is not part of this submission but can be extracted from the .all files. To improve the bathymetric data before the first SVP measurement, an synthetic SVP extracted from the World Ocean Atlas 2009 (Levitus, 2013) using the software Sound Speed Manager (developed by the UNH Center for Coastal and Ocean Mapping and NOAA Coast Survey Development Laboratory (CSDL)).