Dataset: SO150 - Atlas HSDS Data
Imprint
| HOME Imprint |
| Archive | unpublished |
| Dataset citation | unpublished |
| Metadata of dataset | ISO 19115/19139, FGDC |
| Cruise | SO150 |
| Navigation system | Sonne - INS - GPS |
| Horizontal reference system (EPSG) | WGS84 geographic (4326) |
| Sonar system | Simrad EM120 |
| Sonar type | multibeam |
| Depth definition | true depths |
| Depth datum (EPSG) | MeanSeaLevel depth (5715) |
| File format | Raw Hydrosweep DUX format |
| File listing | 179 files, as XML file |
| Tracklength [km] | 4862 |
| Generalised track ¹ | KML file |
| Gross coverage [km²] (unedited - no warranty) | 17065 |
| 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 | The main focus of SO150 was the qualification and quantification of massive gas hydrates in the sediment using seismic methods. Gas hydrates, or clathrates, are ice-like crystals of gases (predominantly methane) and water, which occur in various forms in subseafloor sediments. For continuous bathymetric profiling, the HYDROSWEEP multibeam system was available but it was not a main goal of the cruise. Nevertheless, it was an alternative to the delicate seismic measurements in poor conditions. As a result of bad weather, a closer mapping of the area south of the Hydrate Ridge between 44 26.4 N/125 21.0 W and 44 18.0 N/124 45.0 W was undertaken. In a first step, data were acquisitioned in a quite coarse grid.In order to achieve a close overlapping of the profiles at all depth ranges, acquisition was completed by further measurements with a finer grid (1/3 of the earlier spacing) at the end of the HYDGAS cruise. |
| Sonar system operators | Miriam Spinner, Dorit Könitz |
| (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.