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Presentation of Satellite Based Augmentation System integrity data in an Electronic Chart System display

Zalewski P.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2016

nr 45 (117)

150--156

We propose a Marine Vessel Protection Area (MVPA) model as the means of satellite-based augmentation system (SBAS) integrity data presentation in an electronic chart system (ECS) display. The model takes into account several factors that influence the shape and dimensions of the MVPA. These factors include GNSS signal aspects, where measurement errors depend on the geometry of visible satellites and the signal propagation, the ship’s size, the ship’s heading and its estimated accuracy, position of the GNSS/SBAS antenna relative to the ship’s hull, and SBAS integrity data. The resultant safety contour or domain can be displayed within the ECS or ECDIS as a graphical representation of the marine ship position and the protection level of the electronic position/course fixing equipment, equivalent to the horizontal protection level (HPL) used in aviation.