RV Investigator Voyage IN2017_C02 EM2040c Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_C02, ['Hogan Group Hydrographic Survey – Bass Strait'] which departed Hobart on the 4th May 2017 and came alongside Bell Bay following completion of the survey on the 14th May 2017.

The Kongsberg EM2040c multibeam echo sounder (dual transceivers) was used to acquire seafloor bathymetry and backscatter information [(and watercolumn backscatter)] around Bass Strait.

The EM2040c provides a 1.3° by 1.3° transmit and receive angular resolution respectively (single transceiver). The echosounder's nominal frequency range was [300 kHz] and it was operated in dual swath mode.

Data are stored in *.all raw format for bathymetry and backscatter and *.wcd format for watercolumn backscatter at CSIRO. There are 435 files totalling 99 GB of raw .all data in the 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 applied to the processed data. Processed data has had outliers removed. Processed line data are not available in *.gsf and ascii format, but can be requested if required.

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. The raw data is offline but is available on request.