MS70
Scientific multibeam sonar
The MS70 offers scientific-quality quantitative dataquantitative data and high operational flexibility. It is designed for fisheries research applications. The MS70 provides an acoustic matrix of stabilised and calibrated beams for biomass estimation, fish school characterisation and behaviour studies. The transducer is normally mounted on a drop keel, which allows it to look horizontally.
A new dimension
The MS70 provides an acoustic matrix of 500 beams (25 horizontal and 20 vertical). This enables the MS70 to provide instantaneous 3D volume data. Where other systems need multiple pings to provide 3D volume data, the MS70 can use a single ping. This allows the MS70 to provide more accurate data. For example, a school of fish can change its structure several times during the time other systems need to cover the school.
Low sidelobe levels and beam crosstalk
Low sidelobes are key to ensuring the highest water column data quality. They allow for measurement further than the minimum slant range, where data would otherwise be compromised by the bottom echo seen in secondary lobes. They also prevent strong targets in secondary lobes from being mistaken for weak targets in the main lobe.
Calibration
The MS70 system implements a calibration utility as a special built-in function. Each beam configuration of interest can be calibrated using a reference target (sphere) deployed under the ship. Individual beam parameters are adjusted for calibrated target strength and volume backscattering strength measurements interface.
Key features
- 3D instantaneous quantitative measurements
- 500 beams in a 20 by 25 matrix configuration
- Operating frequencies 75-112 kHz
- Low sidelobe levels and beam crosstalk
- Calibration software included
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