Dataset: SO241 - Simrad EM122 Data
Imprint
| HOME Imprint |
| Archive | unpublished |
| Dataset citation | unpublished |
| Metadata of dataset | ISO 19115/19139, FGDC |
| Cruise | SO241 |
| Navigation system | Sonne (2) - INS - GPS |
| Horizontal reference system (EPSG) | WGS84 geographic (4326) |
| Sonar system | EM 122 |
| Sonar type | multibeam |
| Depth definition | true depths |
| Depth datum (EPSG) | MeanSeaLevel depth (5715) |
| File format | Simrad multibeam processing format |
| File listing | 518 files, as XML file |
| Tracklength [km] | 4428 |
| Generalised track ¹ | KML file |
| Gross coverage [km²] (unedited - no warranty) | 16668 |
| 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 | SO241 set out to test the hypothesis that rift-related magmatism is able to increase carbon emissions from sedimentary basins to the extent that they can actively force climate. Survey speed was variable ranging from 3 - 4.5 kn during the 2D seismic and P-cable surveys to 8 kn during dedicated bathymetry profiles. A roll calibration was carried out but no error could be determined.In general the system worked reliably and only minor data gaps exist due to the start and end points of the 2D seismic lines. However, the outer beams exceeding 60° show a time variant flapping which may limit the usable swath width. Furthermore the EM122 seems to emit too high-density inner beams, even though the pinging mode was set to SHALLOW and the marine mammal protection was switched on to reduce the intensity by -20 db. After three day of surveyngle of the transducer was set to 5° along direction to reduce the scattered energy. But still the EM122 did not refuse to penetrate into the subsurface. |
| Sonar system operators | Christoph Böttner |
| (MaNIDA) data level | 0 |
| Data quality / Lineage | |
| Point of contact | MARUM bathymetry data responsible party |
| Aggregation |
(¹): KML file is created online from database applying track generalization ±50 meter.