Sediment echosounder raw data (Atlas Parasound P70 echosounder entire dataset) of RV POLARSTERN during cruise PS138@en

The Sediment Echo Sounder surveys the upper layers of the seafloor via the reflection of acoustic signals. Depending upon the reflectivity of the sediments penetration depths of about 200 m can be reached. The Parasound P70 (Teledyne RESON, previously ATLAS) was in operation 24 hours per day in the main working areas during Polarstern expedition PS138, covering parts of the Nansen Basin, Amundsen Basin and the Gakkel Ridge. Raw primary high frequency (PHF) and secondary low frequency (SLF) echo sounding data were retrieved during POLARSTERN cruise PS138 (ArcWatch-1) and are archived here in ASD and PS3 format.沉积物回声测深仪（Sediment Echo Sounder）通过声学信号反射对海底上层地层进行探测。根据沉积物的反射率差异，其探测穿透深度可达约200米。Parasound P70（Teledyne RESON，前身为ATLAS）在极星号（Polarstern）PS138科考航次的核心作业区域内实现每日24小时连续作业，作业覆盖范围包含南森海盆、阿蒙森海盆与加克洋中脊的部分区域。本数据集收录极星号PS138航次（ArcWatch-1）采集的原始主高频（PHF）与次低频（SLF）回声测深数据，现以ASD与PS3格式存档于此。