RV Investigator Voyage IN2018_V07 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2018_V07, SOTS: Southern Ocean Time Series Automated Moorings for Climate and Carbon Cycle Studies Southwest Tasmania which departed Hobart on the 20/08/2018 and returned to Hobart on the 25/08/2018.

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 sporadically for the extent of the voyage.

Data are stored in *.raw (60 files 1.3 GB) raw and *.seg (49 files 1.3 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

本记录所涉数据为“调查者号”（RV Investigator）航次IN2018_V07采集的海底剖面仪（sub bottom profiler）数据。该航次隶属于“南大洋气候与碳循环研究用自动锚泊系统时间序列（Southern Ocean Time Series Automated Moorings for Climate and Carbon Cycle Studies，简称SOTS）”西南塔斯马尼亚海域任务，于2018年8月20日从霍巴特起航，同年8月25日返回霍巴特。本次数据采集采用康斯伯格SBP120型海底剖面仪，其获取的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°。该回声测深仪的扫频范围为2.5 kHz至7 kHz。本次航次全程间歇性记录了SBP120的采集数据。数据以两种格式存储于澳大利亚联邦科学与工业研究组织（CSIRO）：*.raw格式文件共60个，总容量1.3 GB；*.seg（即SEG-Y格式）文件共49个，总容量1.3 GB。已对SEG-Y格式数据应用实时处理流程，处理步骤包括增益调整、增益校正、带副本整形的匹配滤波，以及瞬时振幅属性计算与时变增益处理。本数据集的更多详细信息可参阅《GSM数据采集与处理报告》。另有其他数据产品可按需申请获取。