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L-3 Communications ELAC Nautik SEABEAM 3050
November 2007
The reproduction, distribution and utilization of this quotation
as well as the communication of its contents to others without
explicit authorization areprohibited. Offenders will be held liable
for the payment of damages. All rights reserved in the event of the
grant of a patent, utility model or design.
SEA BEAM 3050Multibeam Sonar System
YOUR INNOVATIVE MULTIBEAM SOLUTION
Presented by: L-3 Communications ELAC Nautik Neufeldtstrasse
1024118 Kiel, Germany
Tel.: +49 - 431 - 883 0Fax: +49 - 431 - 883 496E-mail:
[email protected]
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L-3 Communications ELAC Nautik SEABEAM 3050
November 2007
The reproduction, distribution and utilization of this quotation
as well as the communication of its contents to others without
explicit authorization areprohibited. Offenders will be held liable
for the payment of damages. All rights reserved in the event of the
grant of a patent, utility model or design.
System overviewThe SEABEAM 3050 is the latest generation of
mid
and shallow water multibeam bathymetric sonarsystems from L-3
Communications ELAC Nautik GmbH, meeting all relevant survey
standards. Thisadvanced system features a revolutionary
transmittechnique which compensates fully for vessel pitch,roll and
yaw motion.
The SEABEAM 3050 system is a multibeam surveysystem generating
sonar data for wide-swathcontour charts, backscatter data for
seabedsediment classification, raw data for water columnimaging
(WCI) and side-scan data for side-scanimages.
Bathymetric depth information, backscatter data,raw data and
side scan imagery are acquired by thesystem in real-time, logged on
a media and presentedto the surveyor in a co-located and highly
visualformat.
The multi-ping technology increases the maximalsurvey speed (100
% coverage) of the SEABEAM3050 by creating two swathes per
ping.
PerformanceThe system operates at 50 kHz in water depthsranging
from 3m to 3000m at survey speeds of up to
14 knots. The beam covers a 140 degree swathathwart ship (157
with the V-shaped array). Amaximum of 384 bathymetry beams are sent
in eachping. The depth accuracy of the sonar exceeds theIHO SP 44
Special Order.
DesignL-3 Communications ELAC Nautik GmbH is arecognized
competent partner in design andproduction of high quality sonar
solutions based onthe ELAC components. These components are
PCboards which are used for sonar-specific tasks, liketransmitting
or receiving amplifiers. These productsare developed and
manufactured by ELAC. Inaddition, ELAC SONAR products contain
COTSboards. ELAC develops the required software(firmware) which
runs on this hardware especiallyfor beam forming, signal processing
and control of sonar systems. Combining these COTS and
in-housedeveloped and manufactured components allowdesigning
individual sonar systems, optimized for therespective task.
CustomizationThe above described principle of componentsallows
customizing the system so that the newmultibeam allows the choice
of beam widths aswell as transmission modes. For this purpose
thedesign considers the following items:
The vessel will be equipped with onetransducer array which will
be placed in thefirst third of the vessel.
The arrays are designed to minimize themodification on the ships
hull.
The electronic units will be installed in astandard 19rack.
ELAC will deliver a complete systemincluding cables, connectors
and will takecomplete responsibility for the functions.
Standard interfaces which are commerciallyavailable, e.g.
Ethernet, RS 422 etc.
It is considered that green, brown and blueseas are normal
working environments.
Transmit techniqueThe SEABEAM 3050 uses a transmit
technique,which compensates fully for vessel pitch, roll andyaw
motion. This will be achieved by splitting thetransmit fan in
several individual sectors whichcan be steered individually. The
SEABEAM 3050transmit technique achieves full motioncompensation and
guarantees a stable straightcoverage under the vessel.
Spatial aspectsThe main difference between the SEABEAM
3050transmit technique and other sonars (multi-ping)is that the
resulting swath footprints of theSEABEAM 3050 for a series of pings
areessentially evenly parallel spaced lines.
Other systems produce curved lines withoverlapping areas in the
athwart ship direction.This curves and overlapping areas produce
somediscontinuities which will generate artefacts inthe post
processing.
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L-3 Communications ELAC Nautik SEABEAM 3050
November 2007
The reproduction, distribution and utilization of this quotation
as well as the communication of its contents to others without
explicit authorization areprohibited. Offenders will be held liable
for the payment of damages. All rights reserved in the event of the
grant of a patent, utility model or design.
Survey SpeedA big advantage of the SEABEAM 3050 is the
newmulti-ping transmit technique which creates twoswathes in one
ping. Compared with other sonars
with a single swath per ping the dual swath allows ahigher
survey speed especially for narrow alongtrack beam width. At 140
swath the single swathsystem has a maximum survey speed of 6.8
knots.The SEABEAM 3050 has a 140 swath with amaximal survey speed
of 13.7 knots.
System descriptionThe SEA BEAM 3050 major hardware elements
areshown in the figure below.
To complete the system a heading sensor, motionsensor,
positioning system, sound velocity profilerand a surface sound
velocity are necessary.
Transmit and receive arrayThe transducer array LSE 330 works
astransmitter array, the KE 15 as a receiver. Thepre-amplifiers are
built in the receiver array.Multi-cored, shielded, pressure-proof
cables arerequired to connect the array to the transceiverunit. The
transducer as well as the receiver arrayis split in multiple units.
This allows thecustomization of the required along track and
theathwart beam width.
Transceiver unit SEE 37The transceiver unit SEE 37 contains
thetransmitter and receiver electronics.It consists of the
transmitter amplifiers, thetransmit beam former and the
transmittercontroller boards, which offer the interfaces to
the other units and mainly handle all controltasks within the
transmitter.Furthermore the transceiver unit SEE containsthe
necessary elements for signal conditioningand sonar processing.
This includes the receivebeamformer, the detector as well as
informationprocessing e.g. the depth finder, sound
velocitycorrection as well as alignment correction.
Operator stationThe operation station, a dual processor
COTScomputer which operates with a MS Windows orUNIX operating
system, provides the man
machine interface (MMI) to the operator. Theoperator station
will show the various depths,backscatter, side scan, position and
otherrelevant information. Furthermore it offers theoperator the
possibility to make appropriatesettings for the Sonar.
The Sonar MMI application (HydroStar ONLINE) runs on the
operator station. The display datafor the HydroStar ONLINE will be
provided viaEthernet from the SEABEAM 3050.
The presentation and handling of the system isbased on a window
system and is user friendlyand logical. Most operator interaction
in the sub-windows (SWs) will be done with the help of
context-sensitive pop-up menus.
System overview SEABEAM 3050
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L-3 Communications ELAC Nautik SEABEAM 3050
November 2007
The reproduction, distribution and utilization of this quotation
as well as the communication of its contents to others without
explicit authorization areprohibited. Offenders will be held liable
for the payment of damages. All rights reserved in the event of the
grant of a patent, utility model or design.
Specifications
Technical Data
Frequency 50 kHz
Max ping rate 50 Hz
Along track beam width 0.5, 1, 1.5 or 3
Across track beam width 1 or 2
Pulse length 0,15 ms - 10ms
Max Swath coverage sector 140 (planar arrays)157 (V-shaped
arrays)
Pulse forms CW and FM
Max Number of beams 384
Number of transmitter channels 384
Beam spacing equidistance or equiangular
Depth resolution 1 cm
Min depth 3 m under keel
Max depth (approximately) 3000 m
Max coverage (approximately) 4000 m
Stabilization
Roll 15
Pitch 10
Yaw 10
Physical specifications
Height (mm) Width (mm) Depth (mm) Weight (kg)Hydrophone
array12
160160
17461000
294294
180100
Projector array0.511.53
160
160160160
4000
208015001000
364
364364364
300
15012090
Transceiver SEE37 265 483 384 35
Operator Station 88 425 635 23
The dimensions of the arrays depend on the requirements and the
installation possibilities.
Technical data are subject to change without notice.
