RV Investigator Voyage IN2021_E04 SBP120 Sub-bottom Profiler Data

This record describes sub bottom data collected on the RV Investigator voyage IN2021_E04, to calibrate and commission new, upgraded and existing critical equipment (with sea trials and personnel training) onboard RV Investigator for upcoming voyages in the 2021 schedule and beyond. The primary objective for this voyage were testing Seismic Systems. The voyage departed Hobart PW04 on the 15/12/2021 and returned to Hobart PW04 on the 20/12/2021.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 continuously for the extent of the voyage.Data are stored in *.raw (301 files 5.07 GB) raw and *.seg (146 files 2.53 GB) segy formats at CSIRO.The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude 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

本记录描述了“探索者号”调查船（RV Investigator）IN2021_E04航次所采集的海底剖面数据，其采集目的为对该船上的新型、升级及现有关键设备开展校准与交付调试（含海上试验与人员培训），以保障2021年度及后续规划航次的顺利开展。本次航次的核心目标为地震系统测试，航次于2021年12月15日从霍巴特PW04港启航，于2021年12月20日返回该港。本次采集使用Kongsberg SBP120海底剖面仪（sub bottom profiler），以获取包含海底下方不同沉积界面镜面反射信号的数据，该设备的角分辨率为3°×3°。本次航次配套的回声测深仪扫频范围为2.5 kHz至7 kHz，且全程连续记录SBP120海底剖面仪的采集数据。采集所得数据存储于澳大利亚联邦科学与工业研究组织（CSIRO），格式包括*.raw原始格式（共301个文件，总容量5.07 GB）与*.seg（即SEG-Y）格式（共146个文件，总容量2.53 GB）。其中SEG-Y格式数据经过实时处理流处理，处理流程包括增益调整、增益校正、带副本整形的匹配滤波、瞬时振幅属性计算以及时变增益校正。本数据集的补充信息详见《GSM数据采集与处理报告》，额外数据产品可根据申请提供。