Dataset: SO190/1 Simrad EM120 Data

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Archive unpublished
Dataset citation unpublished
Metadata of dataset ISO 19115/19139, FGDC
CruiseSO190-1
Navigation system Sonne GPS+GLONASS GG24
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 listing1106 files, as XML file
Tracklength [km] 6153
Generalised track ¹ KML file
Gross coverage [km²] (unedited - no warranty) 63500
Usage Edited swathfile data are processed for grid and map compilations
Maintenance Update frequency of dataset: notPlanned
Constraints Access: onDemand
Use: copyright
Status completed
Purpose
Abstract The overall goal of SO190-1 was to investigate the relationship between the variability of the subducted plate and the tectonic evolution of the overriding plate. To understand the basic physical processes seismic and geoacoustic measurements were undertaken to quantify the "raw material" and to study the reaction and tectonic counter effects of the overriding plate. Before the EM120 surveys a roll calibration was carried that resulted in an offset of 0.03° positive to port side. This value was applied to the system before cruise SO190, increasing the roll correction from 1.05 to 1.08°. The operational parameters have been set as: no tide correction, equidistant beam coverage, automatic sounding mode, sound velocity at ships keel from ships sensor. Beam angles and across track distance were fixed to 65° and 12000 m. Only when crossing the upper slope and forearc basins in shallower waters the swath width was changed to 70° angle, allowing for slightly broader swaths.
Sonar system operators N/A
(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.