EGNOS 1046 Maritime Service Assessment

Area of Science:

• Satellite Navigation Systems
• Maritime Safety
• Geodesy

Background:

• The International Maritime Organization (IMO) has established performance standards for navigation systems in Resolution A.1046.
• The European Geostationary Navigation Overlay System (EGNOS) is a crucial component of maritime navigation infrastructure.

Purpose of the Study:

• To assess EGNOS performance against IMO Resolution A.1046 requirements for maritime navigation.
• To evaluate EGNOS signal availability, service availability, service continuity, and horizontal accuracy in coastal waters.

Main Methods:

• Utilized two years of data (May 2016 - April 2018) from 108 permanent stations.
• Employed the GNSS Laboratory Tool Suite (gLAB) for data processing and analysis.
• Computed EGNOS solutions and generated EGNOS service maps.

Main Results:

• Achieved a signal availability of 99.999%, surpassing the 99.8% IMO requirement.
• Demonstrated a horizontal accuracy of 0.91 m at the 95th percentile, significantly better than the 10 m requirement.
• Identified regions where EGNOS meets IMO service availability and continuity standards.

Conclusions:

• EGNOS performance meets and exceeds critical IMO requirements for maritime navigation in coastal areas.
• The study suggests revising EGNOS Maritime Service assumptions, particularly regarding EGNOS Message Type 10, to align with aviation standards.