Long Baseline (LBL) remains the preferred solution for the highly accurate subsea positioning of AUVs or ROVs. However, this solution remains costly as it requires the use of at least four transponders to produce a single position.
With the use of INS in subsea vehicles becoming common, sparse-LBL navigation has become possible, achieving similar or better performance using less transponders, simply by fixing potential INS drift using the measured ranges to the seabed transponders while at the same time filtering acoustic ranges using INS data.
Coupling Ramses LBL transceiver, Canopus LBL transponder and an iXblue subsea INS provides an integrated subsea positioning system allowing for precise localization while maintaining unrivaled flexibility.
Using a stand-alone Canopus array makes its communication capabilities the ideal solution for geodetic application.
|Accuracy (mm, 1 sigma)||<10||<10|
|Autonomy (pings at max sound level)||--||2,800,000|
|Autonomy (listening)||--||> 2 years|
|Transducer beam shape||Omnidirectional||--|
|Data logging (Gb)||Up to 32||Up to 32|
|Water depth (m)||Up to 6,000||Up to 4,000|
|Compatibility||Gaps, Canopus, iXblue INS||Gaps, Ramses, iXblue INS|
|Options||--||Inclinometer, pressure, temperature, release, SV sensors, Parioscientific(TM) depth sensor|
iXlive webinar on LBL Positioning Systems