Ruurd Jaarsma

Ruurd Jaarsma, sales engineer at Nortek Netherlands, advises clients on the use of acoustic instruments for monitoring currents, waves and turbidity, as well as navigation of autonomous vehicles. He holds a degree in coastal engineering from TU Delft.

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Presentation

GNSS redundancy with velocity-aided inertial navigation

With the reduced availability of GNSS due to spoofing and jamming and the limitations of lidar-based methods in open sea environments, inertial navigation presents a clear alternative for the reliable navigation of autonomous surface vessels. During extended GNSS outages, velocity aiding becomes essential to achieve survey-grade accuracy. This aiding can be provided by acoustic instruments based on the Doppler principle, offering accurate measurements of speed over ground, as well as measurements of speed through water and current. When integrated with a high-end INS, this solution provides a dependable alternative in situations where GNSS cannot be relied upon.