Dataset: MSM14/2 - Simrad EM120 Data | HOME Imprint |
Archive | unpublished |
Dataset citation | unpublished |
Metadata of dataset | ISO 19115/19139, FGDC |
Cruise | MSM14/2 |
Navigation system | Merian - Seapath 200 |
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 | 1402 files, as XML file |
Tracklength [km] | 6707 |
Generalised track ¹ | KML file |
Gross coverage [km²] (unedited - no warranty) | 46512 |
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 | Seafloor bathymetric mapping has been conducted during the cruise using the SIMRAD EM120 multibeam echo sounder. The angular coverage sector of the echo system may reach 150° in shallow water or a swath width up to 25 km in depths greater than 5000 m. 191 beams as narrow as 2° are generated for each ping. The angular coverage, beam pointing angles and ping rate adapt to varying depth ranges. The ping rate depends merely on the overall round trip travel- and processing time. In shallow waters the ping rate may reach 3 Hz, whereas in 5000 m water depth a ping is generated about every 12 sec. The beam spacing has been set to equidistant beam footprint or in between mode.Water depths are calculated from beam travel times using a sound velocity model. During cruise MSM14-2 two sound velocity profiles were measured. The first sound velocity profile was used for data acquisition with the SIMRAD EM120 system. |
Sonar system operators | R. Lutz |
(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.