RV Investigator Voyage IN2021_T01 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2021_T01, Brisbane to Darwin Transit which departed Brisbane (QLD) on the 11 Jun and returned to Darwin (NT) on the 22 Jun 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 except for certain operations.Data are stored in *.raw (8,040 files 4.10 GB) raw and *.seg (8,191 files 4.02 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“调查者号”（RV Investigator）科考船执行IN2021_T01航次期间采集的浅地层剖面仪（sub bottom profiler, SBP）数据。该航次为布里斯班至达尔文过境航次，于2021年6月11日从昆士兰州（QLD）布里斯班启航，同年6月22日返回北领地（NT）达尔文港。本次数据采集使用Kongsberg SBP120型浅地层剖面仪，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°。该回声测深仪的扫频范围为2.5 kHz至7 kHz。除部分专项作业时段外，SBP120在整个航次期间持续记录数据。数据以两种格式存储于CSIRO：*.raw原始格式（共8040个文件，总容量4.10 GB）与*.seg格式（即SEG-Y格式，共8191个文件，总容量4.02 GB）。SEG-Y格式数据经过实时处理流处理，具体包含增益调整、增益校正、带复制品整形的匹配滤波、瞬时振幅属性计算以及时变增益处理。本数据集的更多详细信息可参阅《GSM数据采集与处理报告》，其他衍生数据产品可根据申请提供。