Dataset: M70/3 - Simrad EM120 Data
Imprint
| HOME Imprint |
| Archive | DOI |
| Dataset citation | HTML, BibTeX, RIS |
| Metadata of dataset | ISO 19115/19139, FGDC, PANGAEA |
| Cruise | M70/3 |
| Navigation system | Meteor C-Nav |
| 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 | Simrad multibeam processing format |
| File listing | 359 files, as XML file |
| Tracklength [km] | 1055 |
| Generalised track ¹ | KML file |
| Gross coverage [km²] (unedited - no warranty) | 11428 |
| 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 speed during the large scale surveys was 8 knots. The opening-angle of the multibeam sounder was 140 degree (for only one profile 150 degree). The wider angle decreased the data quality and was not used again. The 191 beams available were distributed to yield an equidistant spacing on the sea floor. The coverage depends on the water depth, like 5.5 km swath in 1000 m water depth, 11 km in 2000 m, and 13.7 km in 2500 m water depth. SIMRAD provides a yaw correction, which directs the beams according to the mean heading. This decreases the actual beam number slightly for the optimization of full coverage along and across track. For the survey in detail on Amsterdam, Athina and Thessaloniki mud volcanoes the beam-angle was adjusted to cover a swath about one nautical mile on the sea floor. For that operationthe ship speed was reduced to 5 knots. |
| Sonar system operators | Aneta Nikolovska, Markus Brüning |
| (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.