RV Investigator Voyage IN2016_T01 EM122 Multibeam Echosounder Data

Brief description

This record describes multibeam echosounder data collected on RV Investigator voyage IN2016_T01, 'Continuity of Australian terranes into Zealandia: towards a geological map of the east Gondwana margin' which departed Lautoka on the 30th June 2016 and returned to Hobart on the 14th July 2016. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information around Lord Howe Rise and North Loyality Basin and between Lautoka and Hobart. The EM122 provides a 1 degree by 1 degree angular resolution. The echosounder's nominal frequency is 12 kHz. Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 343 files totalling 10 GB of raw data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format is corrected for motion and position. Tide corrections were/were not applied to the processed data. Processed data has had outliers removed. Processed line data is available in *.gsf and ascii format and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset including information on processing streams is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

Lineage

Progress Code: completed

Maintenance and Update Frequency: asNeeded

Statement: Original field data. Processed data are SV corrected, tide not corrected and edited using CARIS version 9.1.1