Dataset: MSM14/2 - Simrad EM120 Data

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Archive unpublished
Dataset citation unpublished
Metadata of dataset ISO 19115/19139, FGDC
CruiseMSM14/2
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 listing1402 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.