Dataset: M78/2 - Simrad EM120 Data | HOME Imprint |
Archive | unpublished |
Dataset citation | unpublished |
Metadata of dataset | ISO 19115/19139, FGDC |
Cruise | M78/2 |
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 | 546 files, as XML file |
Tracklength [km] | 5521 |
Generalised track ¹ | KML file |
Gross coverage [km²] (unedited - no warranty) | 36570 |
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 cruise M78/2 dealt with the study of energy, material and life cycles at spreading axes of the Atlantic. Multibeam mapping was carried out with the Kongsberg Simrad EM120 multibeam system. The main objective was to obtain a detailed bathymetry of the Turtle Pits area as well as of the Inside Corner High, Nibelungen, and Lilliput areas. Additionally long stretches of the transits from and to the working area have been logged. In total 460 nautical miles of lines have been mapped in the working areas during M78/2. System settings of 12 kHz, 2 x 45 opening angle and 191 beams per ping allowed a swath width of about 6500 m at 3000 m water depth corresponding to a theoretically resolution of 30 x 30 m. Ships speed was set to 8 knots during surveys. |
Sonar system operators | S. Petersen, P. Rodriguez, C. Schirnick |
(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.