RV Investigator Voyage IN2023_T01 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2023_T01, titled 'Transit + Opportunistic Mapping + XBT AutoLauncher'. The primary objective of voyage IN2023_T01 is the safe and timely transit of RV Investigator from Sydney to Hobart in preparation for future voyages leaving the port of Hobart. The transit is direct with no operational time available for science operations unless underway at full speed. Any available operational time to be spent on opportunistic seafloor mapping – while keeping Expected Time of Arrival in Hobart on track as the primary objective. The voyage took place between November 2, 2023 and November 5, 2023 (AEST), departing from Sydney and returning to Hobart.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 (311 files 7.01 GB) raw and *.seg (307 files 6.93 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’（RV Investigator）海洋科考船航次IN2023_T01采集的海底浅地层剖面仪（sub bottom profiler）数据，该航次主题为‘过境航行+机遇性海底测绘+XBT自动发射系统’。航次IN2023_T01的首要目标为安全、按时将‘探索者号’科考船从悉尼航行至霍巴特，以筹备后续从霍巴特港出发的科考航次。本次航行为直航，除非以全速行进，否则无可用作业时间开展科学考察活动。任何可调配的作业时间将用于开展机遇性海底测绘，同时需确保抵达霍巴特的预计时间仍符合首要目标的要求。本航次执行时间为2023年11月2日至2023年11月5日（澳大利亚东部标准时间，AEST），从悉尼启航并返回霍巴特。本次数据采集使用康士伯（Kongsberg）SBP120海底浅地层剖面仪，可获取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 kHz至7 kHz。本航次全程连续记录SBP120采集数据。上述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（共311个文件，总容量7.01 GB）与*.seg SEG-Y格式（共307个文件，总容量6.93 GB）。SEG-Y格式数据经过实时处理流处理，处理流程包含增益调整、增益校正、带复制品整形的匹配滤波、瞬时振幅属性计算及时变增益处理。本数据集的更多详细信息可查阅《GSM数据采集与处理报告》。如有需求，可申请获取额外的数据产品。