Fishing Echo Sounders (Net Sounders)

Attention:

Please note that operations of the Fishing Echo Sounders requires experienced scientific staff on board and can be only operated on request. The system is not operated by the ship's crew. Request operations with the Fishing Echo Sounders to AWI-Logistics in sufficient time prior to the cruise and clarify the data transfer after the cruise.

Summary

Transducer Frequency:

Contacts

Components

The system consits of five "split beam" transducers (ES-18, ES-38B, ES-70-7C, ES-120-7C, ES-200-7C) located in the box keel, five General Purpose Transceivers (GPTs), two EK80 WBTs (45-90 kHz, 90-160 kHz) and a computer with installed data acquisition and processing software ER60 and EK80 in room A113.

Subdevices

Position

Data logging, storage and archiving

Logged parameters

Central geographical ship's position and time standard

Time synchronising of the computers is regulated via the affiliation to the Windows domain. Additionally, the NMEA-String ZDA is stored in the data files.
The geographical ship's position is transferred to the Master PC together with the NMEA-String and to the data files.
There is no centering of the GPS Position to the transducers.

Rawdata storage on board

Mass data: The data acquisition and processing software ER60 creates rawdata in the mass storage. Please note that there will be a transit from Simrad EK60 to EK80 in 2018 changing data structure and volume.

root directory	\\polsrv1\data01\fishsounder\|
directory name	CruiseNo e.g. ANT25_3
file name	CruiseNo-Dyyyymmdd-Thhmmss.raw with: yyyy = year mm = month dd = day hh = hour mm = minute ss = second e.g. ANT25_3-D20090113-T144735.raw
Data volume (MB per day) ca	3500
Number of files per day ca	100

Dship

Reduced set of measurement data.

Device name	fishing echo sounder
Parameters	depth (18 kHz) [m]; depth (38 kHz) [m]; depth (70 kHz) [m]; depth (120 kHz) [m]; depth (200 kHz) [m]

Data archiving on land

After the cruise, the operator transfers the measurement data along with required meta data to AWI after consultaion with the data scientist and AWI Logistics. Then, the data including meta data can be extracted from https://www.pangaea.de/ (for authorized users only). DShip data set can be extracted from https://dms.awi.de.

File format(s)	*.txt
Calibration certificates	NO

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