The need for resilient positioning, navigation, and timing (PNT) systems is underscored by GNSS interference in Eastern Europe, particularly in sensitive maritime areas. The RIPTIDE Phase 2 project, backed by the European Space Agency (ESA), has tested a comprehensive ‘Monitor & Protect’ demonstrator designed for operations in the Black Sea and Lower Danube Basin. Led by GMV Innovating Solutions Romania, in collaboration with the Romanian Space Agency and the Romanian Maritime Hydrographic Directorate, the initiative aims to address jamming and spoofing threats impacting ports and shipping routes.
The demonstrator integrates GNSS monitoring with verified navigation messages distributed via AIS/VDES ASM and VDES-R/R-Mode ranging. At the authority level, coastal interference monitoring is paired with VDES transmitters to provide alternative signals and reliable navigation data. For vessels, multi-constellation GNSS is enhanced by VDES-R positioning and onboard interference detection, facilitating autonomous operations during GNSS disruptions.
Recent results showcased at an ESA event highlighted the project’s achievements, including the Monitor & Protect workflow, which assesses GNSS integrity and consistency. Live trials aboard MHD’s Ocean 2 confirmed the system’s resilience against jamming and spoofing, achieving position accuracy below 10 meters under challenging conditions. Beyond maritime applications, the consortium identified potential uses in search and rescue, emergency management, aviation, and transportation, illustrating the broader implications of enhanced PNT systems. Funded under ESA’s NAVISP program, RIPTIDE Phase 2 presents a promising model for hybrid PNT solutions that ensure safe navigation amidst GNSS interference.
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