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The Sonar Doppler Speed Log (DO-Log) is part of nautical equipment. The operation belongs to the bridge only. !!! New The new DO-Log system was installed in December 2017 !!!. |
Summary
Transducer Frequency:
Metadata (Metadata Plugin) | ||
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270 kHz |
Contacts
Components
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The system consists of two transducer elements installed in the ship's keel. The transducers can alternatively be used, e.g. one is backup. Electronic cabinet is mounted in Gravitymeter Room F-632. Hydroacoustic frequency amounts to 270 kHz. Transducer 1 S/N: 17889; Transducer 2 S/N: 17895. |
Subdevices
Position
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The Doppler log measures speed through water by using the Doppler effect of sound signal reflected from the seafloor or from suspended matter in the water column. Two transducer are installed in the ships keel and can be alternatively used. Hydroacoustic frequency amounts to 270 kHz. |
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Transducer Frequency:
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Contacts
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Components
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Subdevices
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Position
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Data logging, storage and archiving
Logged parameters
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Central geographical ship's position and time standard
Metadata (Metadata Plugin) | ||
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Time synchronising is regulated by DShip.
Geographical ship's position is provided by DShip. | ||
Rawdata storage on board
Metadata (Metadata Plugin) | ||
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Data storage in DShip system.
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Dship
Metadata (Metadata Plugin) | ||
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Uncorrected measurement data. | ||
Metadata list |
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|| Device name | DO-Log ||
|| Parameters| speed bottomtrack across \[kn\]; speed bottomtrack ahead \[kn\]; speed watertrack across \[kn\]; speed watertrack ahead \[kn\] || |
Data archiving on land
space-metadata | ||
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After the cruise the DShip data set can be extracted from https://dms.awi.de.
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After the cruise the DShip data set can be extracted from https://dms.awi.de.
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Metadata list |
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|| File format(s) | *.txt ||
|| Calibration certificates | NO || |
Documentation
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Metadata list |
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Documentation
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