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Datasheet
Lodestar- Attitude & Heading Reference System (Surface)
Description
Lodestar is a solid state IMO
approved Attitude and Heading
Reference System (AHRS). The unit
comprised of six sensing elements,
three Ring Laser Gyros (RLG) and
three linear accelerometers, running
a Sonardyne developed
gyrocompass algorithm.
To facilitate surface vessel
applications a flexible power supply
of AC or DC input has been
incorporated. IMO certification
allows Lodestar AHRS to supply
heading, roll and pitch to a vessel’s
dynamic positioning system. In
addition full compensation, including
heave, can be supplied to additional
devices on board such as an
echosounder or helideck monitoring
system.
The Lodestar AHRS utilizes a genuine
gyrocompassing algorithm capable
of precise heading, roll and pitch
estimation in dynamic conditions
without the need for external aiding
inputs or vessel manoeuvres.
Lodestar also applies a heave
algorithm to the vertical motion of the
unit resulting in a robust heave
measurement solution. Therefore, the
Lodestar product is suitable for any
application that requires the accurate
measurement of heading, heave, roll,
and pitch in a highly dynamic
environment.
Where high accuracy and a risk free
solution is required, the Lodestar
AHRS is an ideal replacement for the
motion sensor and gyrocompass
package, due to its dynamic
capability and fast spin up time.
The Sonardyne Lodestar has been
designed with reliability as a priority.
The unit comprises of high grade,
commercially available, IMU
components with a very high
meantime between failure (MTBF).
Lodestar is compatible with all
Sonardyne LBL and USBL products,
as well as multiple applications in the
offshore and survey marketplace.
Key Features
•
Single IP66 rated solution for
motion sensor and gyrocompass
•
0.1º heading accuracy
•
0.01º roll and pitch accuracy
•
<5 minute settling time
•
5cm / 5% heave accuracy
•
Fast follow up speed of 500º / sec
•
MTBF RLG >100,000 hours
MTBF Lodestar >50,000 hours
•
Subsea versions available rated to
1,000, 3,000 and 5,000 metres
•
Flexible power input AC or DC
•
Transport approved Li-Ion battery
back up as standard
•
Internal 4GB memory allows post
processing of a 2 day mission
•
Designed and approved to IMO
Resolution A424(XI)
•
Ethernet interface
•
INS ready
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