The BGGS sea gravimeter system KSS32-M is working as a standlalone device. Once configured, the user-defined data interface (serial RS232, Ethernet) provides the gravity measurements right after the system has powered-up.
To control, parameterize and monitor the system, as well as to display the gravity measurements, the DACQS2 software can be used. DACQS2 can be executed on standard Windows-operated computers/laptops (usually part of the delivery scope).
DACQS2 features:
- User (rights) management
- Configurable data sinks:
- CSV file
- Serial interface R232
- UDP receiver
- SQL database
- User-defineable output data string/format
- Data decimation, configurable
- Time synchronization from external GNSS navigation data
- Automatic variable management for future hardware capabilities
- User-defineable GUI (Magic Edit) for visualization of measurements
- Tidal gravity correction
Tidal correction
The calculation of the tidal correction for the gravity measurements is shown exemplarily in the figure above .
By incorporating the geographical coordinates of the vessel and the actual UTC timestamp from the GNSS input, the tidal acceleration is calculated (blue curve) by a highly accurate tide model. The raw gravity data (red curve) is corrected (black curve) based on these tidal acceleations. The model-based calculation is integrated on the mainboard electronics (ZE) of the KSS32-M so the tidal correction can be used without the need to connect the computer/laptop.
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