| Note |
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Please note that the Marine Gravitymeter System can only be operated upon request. Request operations with the Marine Gravitymeter System to AWI-Logistics in sufficient time prior to the cruise. |
Summary
| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Summary |
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A gravimeter is used to measure accelerations due to the gravitational field of the earth. The gravimeter on board of Polarstern is situated on a gyro-stabilized platform to compensate for the ship's movement. It is a spring and mass system with magnetic compensation, the extension of the spring being proportional to the gravitational force. |
| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Metadata |
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| Manufacturer | Bodensee Gravitymeter Geosystem GmbH (BGGS) |
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| Model | KSS 32 M |
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| Serial No. | n/a |
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| Type | gravimeter |
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| SENSOR-Link | ↪ |
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| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Images |
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| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Contacts |
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| Name | Institution | Role |
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| Thorsten Eggers | Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research | Engineer In Charge | | Alfred Wegener Institute for Polar and Marine Research | Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research | Owner | | Graeme Eagles | Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research | Principal Investigator, Data Scientist |
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Components
| Metadata (Metadata Plugin) |
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The Marine Gravitymeter System consits of the Gravitymeter KSS 32-M and the operator-laptop in the Gravitymeter Room on board. The Gravitymeter control system and data acquisition software BGGS DACQS is installed on the laptop.
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Position
| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | LocalFrame |
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| Info | xyz-position from Alignment Survey Report RV Polarstern (June 2016), located in F632 | | X | 56.99 m
(X-0 is at the center of der rudder (ref. design drawing of the vessel), positive X-axis is forward and along vessel centerline) | | Y | 0.147 m
(Y-0 at centerline, positive Y-axis is portside) | | Z | 11.81 m
(Z-0 is set to the lowest point of the keel, positive Z-axis is upwards) |
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Data logging, storage and archiving
Logged parameters
| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Parameters |
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| Parameter | Sensor Output Type | Unit |
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| acceleration | acceleration | m/s2 | | Gravity | gravity | mGal |
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Central geographical ship's position and time standard
| Metadata (Metadata Plugin) |
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Time stamp from DShip NMEA telegram.
A gyro-stabilized platform accounts for compensation of the ship's movements. Navigation data from DShip NMEA telegram. |
Rawdata storage on board
| Metadata (Metadata Plugin) |
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Data storage in DShip system. Rawdata backup to operator-laptop is possible.
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Dship
| Metadata (Metadata Plugin) |
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Uncorrected measurement data. |
| Metadata list |
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|| Device name | gravimeter ||
|| Parameters | GRAVIMETER.PBGGGD.1.datafield3; GRAVIMETER.PBGGGD.1.datafield4; GRAVIMETER.PBGGGD.2.datafield1; GRAVIMETER.PBGGGD.2.datafield2; GRAVIMETER.PBGGGD.2.datafield3; GRAVIMETER.PBGGGD.2.datafield4 || |
Data archiving on land
| Metadata (Metadata Plugin) |
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After the cruise the DShip data set can be extracted from https://dship.awi.de/. |
| Metadata list |
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|| File format(s) | stored in DShip system ||
|| Calibration certificates | stored in Gravitimeter Room F632 || |
Documentation
The manuals are located in the Gravitymeter Room on board.
| Sensorweb integration |
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| urn | vessel:polarstern:gravimeter |
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| contenttype | Resources |
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