IMOS - ANMN Passive Acoustic Observatory at Tuncurry, NSW (PATUN)

Tuncurry被动声观测站(新南威尔士州Tuncurry/Forster附近)由2至4个装有水听器的系泊设备组成，这些设备安装在130-190米深的海床上，记录海洋中的噪音。该系统可用于监测鲸鱼迁徙、地震活动等自然和人为噪声源。如果设置了四个系泊设备，则在一个边长为5公里的近似等边三角形的每个顶点配置一个系泊设备，第四个系泊设备位于三角形中心。海床上的每个系泊设备上都安装了温度记录仪。<br/> <br/> 每个记录仪以6 kHz的采样率记录，每15分钟中的3-8分钟。如果设置了四个记录仪，则每天还会进行一次22 kHz的记录，以实现仪器时钟的准确同步。这对于根据声源到达阵列中每个水听器的时间来定位声源是必需的。设置在中央系泊设备上的7 KHz ping信号以每天20 S的间隔发出35分钟的ping信号，以覆盖22 kHz样本。<br/> <br/> 来自每个记录器的原始数据采用混合二进制/文本文件的形式，包括：<br/> 1)包含录制开始和结束日期/时间、质量控制和抽样配置的文本页眉和页脚；<br/> 2)16位无符号整数海噪数据，二进制值(IEEE，小端)。<br/> <br/> 在部署前和部署后，使用串联水听器校准具有已知电平输入白噪声的仪器的系统增益。系统校准在奈奎斯特频率的2赫兹以上进行。仪器时钟漂移在部署前后对照GPS传输的UTC时间进行检查。<br/> <br/> 原始数据可以在便携磁盘上从IMOS电子海洋信息基础设施(EMII)获得。<br/> <br/> 科廷大学海洋科学与技术中心(CMST)已经开发了MatLab软件来处理和分析这些数据。<br/> <br/> 这个天文台于2018年初退役。

The Tuncurry Passive Acoustic Observatory (near Tuncurry/Forster, NSW) consists of two to four moorings fitted with /hydrophones set on the seabed at 130-190 m depth that record noise in the ocean. This system can be used to monitor whale and fish migrations, seismic activity and other natural and man-made noise sources. If four moorings are set they are configured with a mooring at each apex of an approximate equilateral triangle of 5 km side with the fourth mooring in the triangle centre. Temperature loggers are set on each mooring at the seabed.<br /> <br /> Each logger records at a sampling rate of 6 kHz for between 3-8 min of every 15 min. If four loggers are set a 22 kHz recording is also made once a day to allow accurate synchronisation of the instrument clocks. This is required for locating the source of a sound based on its time of arrival at each hydrophone in the array. A 7 kHz pinger set on the central mooring pings for 35 minutes at a 20 s interval once per day to overlap the 22 kHz sample.<br /> <br /> Raw data from each logger is in the form of mixed binary/text files comprised of:<br /> 1) text header and footer containing recording start and end date/time, quality control and sampling configuration; and<br /> 2) sea noise data of 16 bit unsigned integer, binary values (IEEE, little endian).<br /> <br /> Instruments are calibrated for system gain with white noise of known level input with the hydrophone in series, before and after deployments. System calibrations are made over 2 Hz to the Nyquist frequency. The instrument clock drift is checked against GPS transmitted UTC time before and after deployment.<br /> <br /> The raw data can be obtained on portable disk from IMOS eMarine Information Infrastructure (eMII).<br /> <br /> The Centre for Marine Science and Technology (CMST) at Curtin University has developed Matlab software to process and analyse these data.<br /> <br /> This observatory was decommissioned in early 2018.