RV Investigator Voyage IN2025_E01 SBP29 Sub-bottom Profiler Data

Updated: 2025-04-30

This record describes sub bottom profiler data collected on RV Investigator voyage IN2025_E01, Trials and calibrations, which departed Hobart on the 19th February 2025 and returned to Hobart on the 1st March, 2025. The Kongsberg SBP29 (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 SBP29 was logged sporadically during the trials voyage and was frequently turned off for calibration of other acoustic systems. Data are stored in *.raw (33 files 489 MB) raw and *.seg (32 files 482 MB) segy formats at CSIRO (total 971 MB). The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping and time variable gain. Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request