RV Investigator Voyage IN2022_V02 EM710 MKII Multibeam Echosounder Data

Full description

This record describes multibeam echosounder data collected on RV Investigator voyage IN2022_V02, titled "Sedimentation at its extreme: how powerful are submarine caldera-forming eruptions (Kermadec arc)?" The voyage took place between March 15, 2022 and April 19, 2022 (AEST), departing from Hobart and returning to Hobart.

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry and backscatter information and watercolumn backscatter in shallow water (<500m) on the shelf of Tasmania and a small portion of the New Zealand continental shelf.

The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz. During IN2022_V02 the frequency range was set from 70 to 100kHz.

Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 37 *.all files totaling 8.15 GB of raw bathymetry/backscatter data and 31 *.wcd files totaling 48.7GB of watercolumn data in this dataset.

Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.

GPS tide was computed using the EGM2008 model and applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format.

Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

Lineage

Maintenance and Update Frequency: asNeeded

Statement: Original field data. Processed data are SV corrected, GPS tide applied using EGM2008 model and edited using CARIS version 11.4.7.

Notes

Credit
["Data collected on the Marine National Facility (MNF) RV Investigator voyage IN2022_V02.","The MNF must be acknowledged in all outputs derived from Data and/or Samples collected by, or with support from, the MNF. Acknowledge the MNF in outputs with the statement: “We acknowledge the use of the CSIRO Marine National Facility (https://ror.org/01mae9353 ) in undertaking this research.” Acknowledgment and citations should be in all forms of publication including presentations (where the acknowledgement should be on the closing slide), journals, books, reports and related research outputs."]

Credit
Ngāti Kuri, the kaitiaki and mana whenua of Rangitāhua (the customary guardians of Rangitāhua (Kermadec arc)) agree to access to this data for educational, academic and non-commercial use. For other proposed use of the data please seek the free, prior and informed consent of Ngāti Kuri [email: [email protected]]. Users of this data are asked to acknowledge Ngāti Kuri as kaitiaki and mana whenua of Rangitāhua in any analogue or digital publications resulting from the use of this data.