A Vessel Positioning Algorithm Based on Satellite Automatic Identification System

Vessels can obtain high precision positioning by using the global navigation satellite system (gnss),but when the ship borne gnss receiver fails,the existence of an alternative positioning system is important for the navigation safety of vessel. in this paper,a localization method based on the signals transmitted by satellite-based automatic identification system (ais) is proposed for vessel in gnss-denied environments. in the proposed method,the positioning model is a modification on the basis of time difference and frequency difference of arrival measurements by introducing an additional measurement,and the measurement is obtained through the interactive multiple model algorithm. the performance of the proposed strategy is evaluated through simulations,and the results validate the feasibility and reliability of vessel localization based on satellite-based ais. © 2017 shexiang ma et al.