RV Investigator Voyage IN2018_V04 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage, IN2018_V04, 'Constraining external iron inputs and cycling in the southern extension of the East Australian Current' which departed Hobart on the 11 September 2018 and returned to Hobart on the 8 October 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 for the extent of the voyage.

Data are stored in *.raw (150 files 6.2 GB) raw and *.seg (145 files 6.03 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

本记录描述的是RV Investigator号考察船IN2018_V04航次采集的浅地层剖面仪（sub bottom profiler）数据，该航次主题为《约束东澳大利亚流南部延伸区的外部铁输入与循环》，考察船于2018年9月11日从霍巴特起航，2018年10月8日返回霍巴特。
本次数据采集使用了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波数据，该设备的角分辨率为3°×3°。
该浅地层剖面仪配套的回声测深模块扫频范围为2.5 kHz至7 kHz，且本航次全程均对SBP120进行了数据记录。
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原始格式（共150个文件，总大小6.2 GB）与*.seg格式（即SEG-Y格式，共145个文件，总大小6.03 GB）。
SEG-Y格式数据经过了实时处理流处理，具体包括增益调整、增益校正、带复本整形的匹配滤波、瞬时振幅属性计算与时变增益处理。
本数据集的补充信息详见《GSM数据采集与处理报告》，额外的数据产品可根据申请获取。