RV Investigator Voyage IN2024_V03 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2024_V03, titled "Untangling the causes of change over 25 years in the southeast marine ecosystem (SEA-MES Voyage 2)." The voyage took place between May 01, 2024 and May 31, 2024 (AEST), departing from Hobart and returning to Sydney.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 (1368 files 30.5 GB) raw and *.seg (1352 files 30.2 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

本记录阐述了"调查者号"（RV Investigator）科考航次IN2024_V03所采集的浅地层剖面数据，该航次主题为《解析东南海洋生态系统25年变化的成因（SEA-MES航次2）》。本次航次执行时间为2024年5月1日至2024年5月31日（澳大利亚东部标准时间，AEST），起航港为霍巴特，终到港为悉尼。本次数据采集采用Kongsberg SBP120浅地层剖面仪（sub bottom profiler），获取了海底下方不同沉积界面的镜面反射信号。该设备的角分辨率为3°×3°，配套回声测深仪的扫频范围为2.5~7 kHz。航次全程对该设备进行了连续数据记录。数据存储于澳大利亚联邦科学与工业研究组织（CSIRO），包含两种格式：*.raw原始格式文件共1368个，总容量30.5 GB；*.seg（即SEG-Y格式）文件共1352个，总容量30.2 GB。SEG-Y格式数据经过实时处理流处理，该流程包含增益校正、带复本整形的匹配滤波、瞬时振幅属性计算以及时变增益调节。本数据集的补充信息详见《GSM数据采集与处理报告》。如需获取额外数据产品，可提出申请。