This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_T01, titled: "Physical and biogeochemical gradients in the East Australian Current." The voyage took place from Hobart (TAS) to Brisbane (QLD) between April 5 and April 14, 2018.
The Kongsberg EM710 multibeam echosounder was used to acquire seafloor bathymetry and backscatter information between Brisbane coastline towards Hobart.
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.
Data are stored in *.all raw format for bathymetry and backscatter at CSIRO. There are 36 files totalling 5.76 GB of raw 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.
Tide corrections were not 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.
Please note that data quality may be affected as the unit was left unattended while testing took place on the underway SVP. There are small refraction errors present in some of the shallow water data as a result.
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.
