RV Investigator Voyage IN2023_E03 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2023_E03, titled "Trials & Calibrations", which was segmented into 3 legs, departing Hobart on September 13 and ending in Sydney on September 30, 2023. Leg 1 (Hobart to Hobart) took place between 13-16 Sep, Leg 2 (Hobart to Hobart) between 16-25 Sep and Leg 3 (Hobart to Sydney) between 26-30 Sep.

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. The SBP120 was logged for the majority of the transit segments of the voyage.

Data are stored in *.raw (543 files 11.6 GB) raw and *.seg (539 files 11.5 GB) segy formats at CSIRO.

The segy format data had a real-time processing stream applied, which applies gain, a gain correction and a matched filter with replica shaping (typically in depths >200m) or a bandpass filter (typically in depths