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Product Survey > Single-beam Echosounders > L-3 Communications ELAC Nautik GmbH

L-3 Communications ELAC Nautik GmbH

  08/02/2012
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Brand L-3 Communications ELAC Nautik GmbH
Year of initial development ?
Product HydroStar 4900
Max. power consumption (W) ? 200
Power (DC, AC) 115V/230VAC
Weight (in air) and dimensions (w x h x d) of transducer/transceiver 0.5 to 265kg, transducer-type dependent: e.g. Ø 60.2cm x 19cm (LSE 179, 12kHz), Ø 13.2cm x 10.5cm (LSE 313, 200kHz)
Weight and dimensions (w x h x d) of display and logging unit 42kg with housing, 50.5cm x 40cm x 59cm; 25kg for integration into 19" rack, 6HU
Portability of logger (rack, desktop, portable) Rack or desktop
Software platform (Windows, other) Windows embedded
Depth range of operation (m) 10, 25, 50, 100, 250, 500, 1,000, 3,000, 6,000, 10,000
Frequency range (kHz) 12, 15, 30, 50, 100, 200, 400, 1,000. Choice of frequency on request
Number of frequencies supported simultaneously 2
Power output of transducer at standard frequencies 2kW @ 12kHz; 0.2kW @ 200kHz
Beam angles (along and across) 14° x 12° @ 12kHz; 12° x 12° @ 200kHz
Depth resolution, accuracy 1cm @ 25m, 10cm @ 250m, 100cm @ 10,000m, 1% scale accuracy
Max. pulse sounding rate 4Hz @ 10m range; 50mHz @ 10,000m range
Pulse length 0.1-100ms
Dynamic range (dB) 92-109
Are heave, pitch and roll corrections included? Yes
Capable of being operated remotely (e.g. via PC) Yes
Supported external data inputs (heave/roll/pitch, positioning) VRU, DGPS, CTD
Can events and annotations be marked? Yes
Can sound velocity and temperature profiles be included in real time ? Yes
Is real-time coupling to survey/post-processing software possible? Yes
What data are displayed in real time (e.g. depth, classification, thickness)? Depth, sediment classification as option
Data output options (e.g. raw data, transducer and motion-corrected depth, sea floor classification) Heave-corrected depth
Data output formats NMEA or proprietary
Data output for sea floor classification? N/A
How are data displayed? Digital display
Connection possibilities 8 x RS422, network, network printer, monitor
How are data internally logged? Internal HDD up to 168 hours
Main use of the system Survey echosounder



     


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Hydrographic Survey for Riverbed Erosion

 

U.S. Geological Survey were out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyzes the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed. 

Gage height at the Williston gage was approximately 27.65 feet when this video was taken. Additional information about the USGS streamgage at Williston is available at http://waterdata.usgs.gov/nd/nwis?program=nwisman&site_no=06330000

 

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