RV Investigator Voyage IN2022_V08 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage voyage IN2022_V08, titled "Biodiversity Assessment of Australia’s Indian Ocean Territories", which departed Darwin on September 30 and returned to Fremantle on November 3, 2022. This was a continuation of voyage IN2021_v04.The Kongsberg SBP120 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP120 provides a 3° by 3° angular resolution.The echosounder's frequency sweep range is from 2.5 to 7 kHz. With the exception of periods when stationary (e.g. during CTD casts), the SBP120 was logged continuously for the extent of the voyage.Data are stored in *.raw (1015 files 22.2 GB) raw and *.seg (1006 files 22.1 GB) segy formats at CSIRO.The segy format data had a real time processing stream applied, which applies gain, a gain correction, and matched filter with replica shaping.Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request.