Dataset: MSM24 - Simrad EM122 Data
Imprint
| HOME Imprint |
| Archive | DOI |
| Dataset citation | HTML, BibTeX, RIS |
| Metadata of dataset | ISO 19115/19139, FGDC, PANGAEA |
| Cruise | MSM24 |
| Navigation system | Merian - Seapath 320 |
| Horizontal reference system (EPSG) | WGS84 geographic (4326) |
| Sonar system | Simrad EM122 |
| Sonar type | multibeam |
| Depth definition | true depths |
| Depth datum (EPSG) | MeanSeaLevel depth (5715) |
| File format | Simrad multibeam processing format |
| File listing | 914 files, as XML file |
| Tracklength [km] | 9007 |
| Generalised track ¹ | KML file |
| Gross coverage [km²] (unedited - no warranty) | 92033 |
| Usage | Primary data are generally not depth-edited and should not directly be used for final product compilations. |
| Maintenance | Update frequency of dataset: notPlanned |
| Constraints | Access: onDemand Use: copyright |
| Status | completed |
| Purpose | |
| Abstract | During Cruise MSM24, bathymetric mapping was conducted using the hull-mounted Kongsberg Simrad system EM122. The deep water system EM122 was operated continuously during the cruise including transit routes in a 24-hour schedule.The angular coverage sector and beam pointing angles may be set to vary automatically with depth according to achievable coverage. This maximizes the number of usable beams. The beam spacing was set to equidistant. A general swath width of 55° was used to collect as much bathymetric information as possible. Wider swath widths were tested occasionally, however, the data quality decreased dramatically for the outer beams, most probably due to the high ship speed of 12 to 13 kn. In addition SVP-data (see chapter 5.1.2) was actualized in time to avoid artefacts in the data concerning especially the downward dip of the outer beams resulting from sound velocity variations. |
| Sonar system operators | Gesa Barkawitz, Janina Kammann, Irena Schulten |
| (MaNIDA) data level | 0 |
| Data quality / Lineage | |
| Point of contact | AWI bathymetry data responsible party |
| Aggregation |
(¹): KML file is created online from database applying track generalization ±50 meter.