User manual SIMRAD ME70 DATASHEET REV C

[. . . ] Simrad ME70 Scientific multibeam echo sounder system We are proud to introduce the world's first quantitative multibeam echo sounder for fishery research applications (CD10100) www. SIMRAD. com MAXIMIZING YOUR PERFORMANCE AT SEA System description System overview The Simrad ME70 offers quantitative data and high operational flexibility. It provides a configurable wide fan of stabilized and calibrated beams for biomass estimation, fish school characterization. All beams can be configured as split beams providing data for single target analysis, such as target strength measurements and target tracking. [. . . ] · The Simrad ME70 provides a configurable acoustic fan containing 3 to 45 stabilized beams. · All beams can be configured as split beams. · Minimum beam opening is 2° depending on operational frequency and steering. · 140° maximum total swath width. · The athwartship centre angle of the fan can be adjusted from +45° to -45°. · Minimum acquisition depth is less than 1 m below the transducer depending on beam mode configuration. · Sidelobe levels and beam interleakage are adjustable from -35 to -70 dB depending on beamwidth and frequency configuration. Calibration A calibration utility is implemented as a special built-in function in the Simrad ME70 system. Each beam configuration of interest can be calibrated using a reference target located under the ship. Individual gain parameters for each beam are adjusted to provide calibrated target strength and volume backscattering strength measurements. Splitbeam configuration All beams can be configured as split beams. In addition, two adjustable reference split beams are available. These allow you to compare ME70 data with data from other split beam systems, for example the EK60. The reference beams can for example have 7x7 degrees opening angles, and operate on 70 and 120 kHz. The data from the individual split beams are presented in the same way as on other Simrad scientific sounders. Data output It is possible to set up continuous output of all beam data. This can be used for echo integration and 3D visualisation. [. . . ] (Data kindly provided by Ifremer, France. ) MENU System diagram Operator station Beamforming computers (CD93003A) PWR Network controller Operator station The operator station comprises a computer running Windows XP® operating system. It is connected to the ship's network, and can communicate with external post-processing applications. Transceiver (CD10102C) TRXU Transceivers Power cabinets The transceiver circuitry comprises three transceiver shelves, a network controller, and six beamforming computers. Power Cabinets Three separate power cabinets provide the operation power to the TRXU Transceivers. Transducer The transducer array is mounted in a circular housing. The array contains 800 individual elements. Technical specification System · Scientific multibeam echo sounder Acoustics Frequency range Receiving · Receiver dynamic range: 150 dB (instantaneous) Calibration · Calibration software included · Target: Tungsten sphere Hardware Transducer · 70 kHz to 120 kHz Beams · Organisation: Fan · Total number of beams: Maximum 45 beams in fan plus two reference beams · Number of split beams: Maximum 45 split beams in fan plus two reference beams Beam opening angles · Alongship: Selectable 2° to 20° · Athwartship: Selectable 2° to 20° · Opening angles depend on beam steering and frequency. Operating sectors · Number of elements: 800 · Technology: Ceramic polymer composite · Housing: Circular · Housing diameter: 700 mm Transceiver Unit · Athwartship: 60° Maximum 140º with reduced sidelobe suppression · Athwartship sector centre angle: ±45º · Alongship sector centre angle: ±5º Motion compensation · Individual Tx channels: 800 · Individual Rx channels: 800 · Beamforming: Cluster of six computers · Communication: 1 Gb Ethernet · Physical dimensions: Height: 1921 mm Depth: 900 mm Width: 600 mm Power cabinets · Roll: ±10° · Pitch: ±5° · Heave Sidelobe and beam interleakage · Quantity: Three cabinets · Physical dimensions: Height: 812 mm Depth: 418 mm Width: 600 mm Operator Station · Alongship: Less than -35 dB · Athwartship: Less than -35 dB · Configurable depending on beamwidth and frequency configuration. Transmission · Type: Commercial workstation · Operating system: Microsoft® Windows XP® Optional systems · Element data logger · Bathymetric processing system The transducer array set up for test and calibration at Simrad's laboratory · FM with pulse duration 128 to 5120 µs · CW with pulse duration 64 to 5120 µs · Source level: > 225 dB (depending on beam opening and frequency) Note that technical specifications can be altered without prior notification! (855-165184 / Rev. C / November 2006) Simrad Horten AS Strandpromenaden 50 P. O. Box 111 N-3191 Horten, Norway Telephone: +47 33 03 40 00 Telefax: +47 33 04 29 87 www. simrad. com simrad. sales@simrad. com [. . . ]