Dataset: MSM37 - Simrad EM122 Data
Imprint
| HOME Imprint |
| Archive | unpublished |
| Dataset citation | unpublished |
| Metadata of dataset | ISO 19115/19139, FGDC |
| Cruise | MSM37 |
| 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 | 1443 files, as XML file |
| Tracklength [km] | 12424 |
| Generalised track ¹ | KML file |
| Gross coverage [km²] (unedited - no warranty) | 38377 |
| 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 ship’s multi-beam echosounding system (MBES) Kongsberg EM 122 was used through-out the cruise for mapping North Pond and the adjacent areas. To increase the spatial resolution we restricted the beam width to 2 km on each side. The system was tested right after arrival at North Pond to check if a depth offset that was reported from the last cruise is still present. The results of a test profile were good so the system could be used as planned. The first CTD was run with an autonomous sound velocity profiler whose results were used during the cruise for all surveys. Due to the use of a ROV which has a CTD on board we also had the possibility of ground truthing the depth soundings of the EM122. In general, both depths agreed very well. However, in areas with small-scale and rugged topography and steep cliffs, the resolution of a ship based bathymetric mapping system is at its limits. |
| Sonar system operators | Stefanie Gaide |
| (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.