RV Investigator Voyage IN2015_E04 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator sea trial voyage IN2015_E04, which departed Hobart 2015-04-25 and returned on 2015-04-28.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 for a few hours while testing for acoustic interference (01:30 2016-04-26 - 11:15 2016-04-26)Data are stored in *.raw (8 files 454 MB) raw and *.seg (8 files 448 MB) 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

本记录所描述的浅地层剖面仪（sub bottom profiler, SBP）数据采集自“探索者号”（RV Investigator）海试航次IN2015_E04，该航次于2015年4月25日从霍巴特港启航，2015年4月28日返航。本次数据由康斯伯格（Kongsberg）SBP120型浅地层剖面仪采集，所得数据包含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。该SBP120设备在声学干扰测试期间被记录数据数小时，测试时段为2016年4月26日01:30至2016年4月26日11:15。本数据集存储于澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO），格式包括*.raw原始格式（共8个文件，总大小454 MB）与*.seg SEG-Y格式（共8个文件，总大小448 MB）。针对SEG-Y格式数据，已应用实时处理流程，该流程涵盖增益调整、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处理。有关本数据集的更多详细信息可查阅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。