Dataset: M78/2 - Simrad EM120 Data

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Archive unpublished
Dataset citation unpublished
Metadata of dataset ISO 19115/19139, FGDC
CruiseM78/2
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 listing546 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.