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| Metadata (Metadata Plugin) |
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18, 38, 70, 120, 200 kHz |
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Contacts
| Sensorweb integration |
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| urn | vessel:polarstern:simrad_ek80_ps |
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| contenttype | Contacts |
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| Name | Institution | Role |
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| Sören Krägefsky | Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research | Engineer In Charge, Principal Investigator, Data Scientist | | Alfred Wegener Institute for Polar and Marine Research | Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research | Owner |
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| Metadata (Metadata Plugin) |
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| 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. |
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Subdevices
| Sensorweb integration |
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| urn | vessel:polarstern:simrad_ek80_ps |
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| contenttype | Subdevices |
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| Name | Model | Serial Number | SENSOR-
Link |
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| F120/200_kHz transducer | Simrad EK80 | n/a | ↪ | | F18_kHz transducer | Simrad EK80 | n/a | ↪ | | F38_kHz transducer | Simrad EK80 | n/a | ↪ | | F70_kHz transducer | Simrad EK80 | n/a | ↪ | | acoustic doppler current profiler and echo sounder | EC150-3C transducer | n/a | ↪ |
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| Metadata (Metadata Plugin) |
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| 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. |
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Rawdata storage on board
| Metadata (Metadata Plugin) |
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| 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.
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| Metadata list |
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|| 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 || |
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Dship
| Metadata (Metadata Plugin) |
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Reduced set of measurement data. |
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| Metadata list |
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|| 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) \[m\] || |
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Data archiving on land
| Metadata (Metadata Plugin) |
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After the cruise, the operator transfers the measurement data along with required meta data to AWI after consultation 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://dship.awi.de/. |
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| Metadata list |
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|| File format(s) | *.txt ||
|| Calibration certificates | NO || |
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Calibration
The EK80 system must be calibrated. Ideally, the calibration is executed before and after the measurement in the working area. So, the calibration parameters can be defined dependent the actual water conditions. For this reason a calibration on previous cruises will not lead to optimal results.
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