Delivering Trusted Solutions For Subsea Acoustics
- Overview
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- Key Features
- Single box solution for motion sensor and gyrocompass
- 0.1 degree heading accuracy
- 0.01 degree roll and pitch accuracy
- 5cm / 5% heave accuracy
- Fast follow up speed of 500/Sec
- Available in surface and subsea versions rated to 1000, 3000, 5000 metres
- Ethernet interface
- Transport approved Li-Ion battery back up as standard
- Flexible power input AC or DC
- On board 8GB memory (Expandable to 32GB)
- MTBF RLG >300,000 hours MTBF Lodestar >50,000 hours
- Datasheets
- Lodestar Surface
- Lodestar Subsea
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Lodestar is a solid state Attitude and Heading Reference System (AHRS) and Acoustically Aided Inertial Navigation System (AAINS).
The unit comprises 3 high grade/high reliability, commercially available Ring Laser Gyros (RLGs) and 3 linear accelerometers. A Sonardyne developed gyrocompass algorithm runs in the background even when used as an AAINS.
A flexible AC or DC power input has been incorporated to facilitate surface vessel applications. With the battery back up capability supplied, the unit is able to continue running the AHRS and AAINS algorithm during vessel power brown-outs.
The Lodestar AHRS algorithm outputs precise heading, roll, pitch and heave estimation in dynamic conditions without the need for external aiding inputs or vessel manoeuvres.
Lodestar is the core component in Sonardyne SPRINT and DP-INS systems. It directly interfaces to aiding sensors such as USBL or LBL transceivers, a DVL, a GNSS receiver, a pressure sensor and a sound speed sensor (SSS).
Applications Include:
An optimised USBL system: The directly coupled precise attitude data complements the precision of advanced USBL systems.
As a precise position input to DP systems using AAINS, a USBL system and one or more seabed reference beacons for operations in excess of 2000m.
As a positioning system for an ROV, aided by a combination of position estimates from a topside USBL system, vehicle mounted DVL, pressure, sound speed and LBL transceiver (subsea option).
Multi-beam Surveys
- Specifications - Surface Lodestar
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Feature Type 8084-000-0000 Attitude Heading Range 0-360° Accuracy 0.1° secant latitude Settle Time Less than 5 minutes Follow Up Speed 500º / second Resolution 0.01º Roll & Pitch Range ±180º (No physical limit) Accuracy 0.01º Resolution 0.01º Heave Range ±99 m Accuracy (Real Time) 5 cm or 5% (whichever the greater) Bandwidth User Selectable Resolution 0.01 m Physical Size (hxwxd) 276 mm x 214 mm x 297 mm Weight 13 kg Mechanical Construction Aluminium, Powder Coated Environmental Operating Temperature -10°C to +55°C Shock Rating Operational 22 g, 11 ms half sine IP Rating IP66 Power Requirement 110 / 230 V AC, 60 / 50 Hz or 24 / 48 V DC, 15 W nominal, 35 W max Back Up Battery Type / Life Li-Ion / 2 hours Data Storage 8GB internal memory (expandable to 32GB) Digital Output Number of Digital Ports / Protocol 5 x Digital Ports / RS232 or RS485 Other Ports 1 x Ethernet AAINS Navigation Error-scenario and aiding dependent Navigation Error (Free Inertial) Typically 10 m, 4 minutes after loss of aiding Maximum Acceleration 2.5 g or 10.0 g - Specifications Subsea Lodestar
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Feature Type 8084-000-1110 (1,000m depth rated version) Attitude Heading Range 0-360° Accuracy 0.1° secant latitude Settle Time Less than 5 minutes Follow Up Speed 500º / second Resolution 0.01º Roll & Pitch Range ±180º (No physical limit) Accuracy 0.01º Resolution 0.01º Heave Range ±99 m Accuracy (Real Time) 5 cm or 5% (Whichever the greater) Bandwidth User Selectable Resolution 0.01 m Physical Size (diaxl) 211 mm x 375 mm Weight In Air/ Water In Water 14.0 kg / 3.0 kg Mechanical Construction Anodised Aluminium Environmental Operating Temperature -10°C to +55°C Shock Rating Operational 22 g, 11 ms half sine IP Rating IP66 Power Requirement 24 / 48 V DC, 15 W nominal, 35 W max Back Up Battery Type / Life Li-Ion / 2 hours Data Storage 8GB internal memory (expandable to 32GB) Digital Output Number of Digital Ports / Protocol 4 x Digital Ports / RS232 or RS485 Other Ports 1 x Ethernet AAINS Navigation Error - scenario and aiding dependant Navigation Error (Free Inertial) Typically 10 m, 4 minutes after loss of aiding Maximum Acceleration 2.5g or 10.0g - Manuals
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- Support
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Technical Bulletins
Title Description Lodestar based product export licensing - No: TB13-007 Sonardyne has received several enquiries from Customers who have purchased Sonardyne Lodestar based products (currently Lodestar, SPRINT, Lodestar GyroCompatt and Lodestar GyroUSBL) about the requirements to have the product licensed by the US Department of Commerce. This document describes the US Department of Commerce licensing requirements for Lodestar based products. Lodestar based product export licensing - No: TB12-009 The range of Sonardyne Lodestar based products all contain components which are licensed by the US Department of Commerce and are controlled under the EAR (Export Administration Regulations). Any movement of products containing these items require a Re-export licence issued by the US Department of Commerce. - Related Products
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