Abstract:

To improve the position accuracy of ship in the satellite location system of time difference of arrival (TDOA), a technique of position calibration based on information of automatic identification system(AIS) is proposed. The warship position can be calibrated by the ship with AIS information acting as a reference source in the method. Firstly, because the position in AIS information cannot be used to calibrate immediately, the method for estimating the radar position of reference source and the error of radar position is raised. Secondly, aiming at the error of reference source position, the model of error analysis and the analysis method for the validity of reference source are found, the calibration accuracy and the capability of improving on position accuracy are analyzed in theory, by which a reference source can be selected. Finally, the validity of the new technique is tested through simulation.