RV Investigator Voyage IN2017_T01 SBP120 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2017_T01, Natural iron fertilisation of oceans around Australia: linking terrestrial dust and bushfires to marine biogeochemistry, which departed Sydney on the 24th September 2017 and returned to Broome on the 8th October 2017.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 during the voyage.Data are stored in *.raw (21 files 1.45 GB) raw and *.seg (20 files 1.42 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

本记录所描述的，为RV Investigator号科考船IN2017_T01航次采集的浅地层剖面仪（sub bottom profiler）数据。该航次的科考主题为“澳大利亚周边海域自然铁肥化：陆地尘埃与林火对海洋生物地球化学的关联影响”，于2017年9月24日从悉尼启航，同年10月8日返回布鲁姆。本数据集由Kongsberg SBP120浅地层剖面仪采集，可获取海底下方不同沉积界面处的镜面反射信号。该SBP120的角分辨率为3°×3°，其回声测深仪的扫频范围为2.5 kHz至7 kHz。本航次期间，SBP120仅被间歇性记录运行数据。数据集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21个文件，总容量1.45 GB）与*.seg SEG-Y格式（共20个文件，总容量1.42 GB）。其中SEG-Y格式的数据经过了实时处理流程，该流程涵盖增益调整、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。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；额外的数据产品可按需申请获取。