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Please note that operations of the Sound Velocity Probe MIDAS SVP requires experienced scientific staff on board. The system is not operated by the ship's crew. Announce operations with the Sound Velocity Probe MIDAS SVP to AWI-Logistics prior to the cruise and clarify the data transfer after the cruise. |
Summary
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MIDAS Sound Velocity Profiler is used for measuring the speed along a vertical transect through the water column up to 6000m water depth. Two identical Valeport MIDAS probes exist on RV Polarstern, the second probe with serial number SN34079 serving as backup for SN41492. |
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Transducer FrequencyTransducer Frequency
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1, 2, 4 or 8 Hz |
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Contacts
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Components
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The sound velocity probe consits of the probe, the mounting cage and the computer.
The data processing software DataLog Express is installed on the computer. RS232 interface connects the computer to the probe. The sound velocity profiles can be transferred to the computer of the multibeam echo sounder Hydrosweep DS3 via the computer network. |
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Position
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Data logging, storage and archiving
Logged parameters
Central geographical ship's position and time standard
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??? Time synchronising of the computers is regulated via ??? |
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??? The geographical ship's position is transferred to ???
??? centering of the GPS Position to the transducer ??? |
Rawdata storage on board
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The sound velocity probe measures the sound velocity in temporally equidistant intervals and stores the data to the internal flash drive. Import of the data from the probe to the computer is conducted with the data processing software DataLog Express. There is no designated central sound velocity data storage location. The opterator is in charge of sound velocity data storage for further use, e.g. data transfer to the multibeam echo sounder Hydrosweep DS3. |
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|| root directory | - ||
|| directory name | - ||
|| file name | ... ||
|| Data volume (MB per day) ca | ??? ||
|| Number of files per day ca | ??? || |
Dship
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No data transfer to DShip. |
Data archiving on land
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??? 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). ??? |
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|| File format(s) | ??? ||
|| Calibration certificates | ??? || |
Documentation
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Rawdata storage on board
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Data archiving on land
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| Metadata list |
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Documentation
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