Fishing Echo Sounder (Simrad EK 60 / EK 80)

Attention:

Please note that operations of the Fishing Echo Sounder Simrad EK 60 / EK 80 requires experienced scientific staff on board. The system is not operated by the ship's crew. Announce operations with the Fishing Echo Sounder Simrad EK 60 / EK 80 to AWI-Logistics prior to the cruise and clarify the data transfer after the cruise.

Data quality of Fishing Echo Sounder Simrad EK 60 / EK 80 is decreased by operating other Echo Sounders. Repeatable disturbances were detected from simultaneously operating a) POSIDONIA, b) Deep Water Sounder Simrad EA 500 DWS, c) Sonar Doppler Speed Log DOLOG and d) Sediment Echo Sounder Parasound P70. Switch off these Echo Sounders for high data quality.

Summary

Transducer Frequency:

18, 38, 70, 120, 200 kHz

Responsible Persons

Components

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

38 kHz	70 kHz	120 und 200 kHz

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.

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)	???
Calibration certificates	???

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