Southern East Australian Current Seafloor Bathymetry and Backscatter Survey

September to October 2018 multibeam echosounder data from the RV Investigator voyage IN2018_V04. The dataset contains 11.1 GB of raw data across 23 files, collected by the Australian Ocean Data Network to study iron inputs in the southern extension of the East Australian Current. Processed data includes bathymetry grids, backscatter information, and water column backscatter.

Use Cases

• Map seafloor bathymetry using processed geotiff grids for geological feature identification.
• Analyze backscatter intensity from *.all files to infer seabed sediment type and hardness.
• Study water column backscatter from *.wcd files to detect biological scatterers or suspended particulates.
• Apply motion and position corrections from the raw *.all data to validate bathymetric survey accuracy.
• Integrate tide-corrected processed line data in *.gsf format with ocean current models.

Strengths

• 11.1 GB of raw acoustic data provides high-resolution seafloor information.
• Data includes three processing streams: raw *.all/*.wcd, processed line *.gsf/ascii, and final geotiff grids.
• Survey covers a 28-day voyage with specific temporal bounds from 11 September to 8 October 2018.
• Acquisition used a Kongsberg EM710 MKII echosounder with 0.5° by 1° angular resolution and 40-100 kHz frequency range.

Limitations

• Tide correction status is ambiguous, noted as '[were/were not] applied', potentially affecting vertical accuracy.
• Sample size and spatial extent are not quantified beyond file count and data volume.
• Access to additional data products requires a manual request process.

Provenance

Source

Australian Ocean Data Network

Collection Method

Collected via Kongsberg EM710 MKII multibeam echosounder aboard RV Investigator.

Time Range

11 September 2018 to 8 October 2018

Freshness

null

Geography

Southern extension of the East Australian Current, voyage departed and returned to Hobart, Australia.