Dataset: M78/3b - Simrad EM120 Data

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Archive unpublished
Dataset citation unpublished
Metadata of dataset ISO 19115/19139, FGDC
CruiseM78/3b
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 listing747 files, as XML file
Tracklength [km] 3164
Generalised track ¹ KML file
Gross coverage [km²] (unedited - no warranty) 19842
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 Meteor-Cruise M78/3 investigated the sediment transport and depositional patterns by means of hydroacoustic and seismic mapping as well as geological sampling with conventional coring tools and the new MARUM seafloor drill rig (MeBo). During Cruise M78/3 the hull-mounted Kongsberg Simrad systems EM120 and EM710 were used for bathymetric mapping. The deep water system EM120 was operated continuously during all seismic surveys but also on transit routes in a 24 hour schedule. The shallow water systems EM 710 was switched on during profiling in shelf areas. Due to bad weather conditions, part of the data are quite noisy and even time-consuming processing could not remove all artifacts. For the EM710 data it turned out that for high variations in roll, pitch and heave the corrections of the used motion sensor were not sufficient to gather reasonable data and processing of these data was not successful.
Sonar system operators T. Schwenk, B. Preu and Shipboard Scientific Party
(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.