Betzler, Christian; Lindhorst, Sebastian; Wunsch, Marco (2022): Multibeam bathymetry raw data (EM 120 echosounder entire dataset) of RV SONNE during cruise SO236 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.942464
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Published: 2022-03-17 • DOI registered: 2022-05-27
Abstract:
Multibeam bathymetry raw data using the ship's own Kongsberg (Simrad) EM 120 multibeam echosounder was almost continuously recorded during RV SONNE cruise SO236. Data was recorded on 20 days between 2014-08-09 and 2014-08-29. This dataset contains various surveys at the Maldives islands. The approximate average depth of the entire dataset is around 1400m.
The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication. No ancillary sound velocity profiles (SVP) files from the cruise are archived at the BSH, thus no SVP files are added to this dataset. However, data analysis of the multibeam raw data revealed that SVP has been changed a few times during the survey.
This publication is conducted within the efforts of the German Marine Research Alliance in the core area "Data management and Digitalization" (Deutsche Allianz Meeresforschung, DAM).
Data are unprocessed and therefore contains incorrect depth measurements (artifacts) without further processing. Note that refraction errors can be expected due to the lack of proper SVP. Overall, it appears that the data quality is rather moderate since the gridded hillshade data showed some obstacles. During the cruise the multibeam system was considered not working properly (SO236 was the last scientific voyage of RV SONNE).
Data can be processed e.g. with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022).
Related to:
Betzler, Christian (2015): RV Sonne Cruise Report / Fahrtbericht SO-236, Malé to Colombo, 9 to 29 August 2014. Institut für Geologie, Universität Hamburg, 48 pp, https://doi.org/10.2312/cr_so236
Project(s):
DAM Underway Research Data (DAM_Underway)
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03G0236A: SO 236 - MALSTROM: Malediven Karbonatstratigraphie und IODP Pre-Site Survey
Coverage:
Median Latitude: 4.548048 * Median Longitude: 73.372980 * South-bound Latitude: 3.120893 * West-bound Longitude: 72.792032 * North-bound Latitude: 5.536564 * East-bound Longitude: 74.970178
Date/Time Start: 2014-08-09T04:42:48 * Date/Time End: 2014-08-27T14:42:16
Minimum ELEVATION: -2634.87 m a.s.l. * Maximum ELEVATION: -6.71 m a.s.l.
Event(s):
SO236_0_Underway-1 * Latitude Start: 4.179785 * Longitude Start: 73.493914 * Latitude End: 4.266789 * Longitude End: 73.756038 * Date/Time Start: 2014-08-09T04:42:48 * Date/Time End: 2014-08-27T14:55:49 * Campaign: SO236 (MALSTROM) * Basis: Sonne * Method/Device: Swath-mapping system Simrad EM-120 (Kongsberg Maritime AS) * Comment: Event shows start/end point (date/time & coordinates) of first/last data record using Kongsberg (Simrad) EM 120 multibeam echosounder during cruise SO236
Comment:
These data should not be used for navigational purposes.
Data publishing was realized by Daniel Damaske, MARUM - Center for Marine Environmental Sciences (University Bremen).
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)
Size:
11968 data points
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