SYSTEM AND METHOD FOR DETECTING AMBIGUITIES IN SATELLITE SIGNALS FOR GPS TRACKING OF VESSELS

摘要

The present invention relates to a system for detecting ambiguities in a satellite signal for the GPS tracking of vessels, which includes: a GNSS receiving unit obtaining a vessel position using a plurality of satellites; a vessel position calculating unit calculating a second vessel position from a first vessel position after a specific amount of time elapses using dead-reckoning; a distance calculating unit calculating prediction distances between each of the satellites and the vessel and an error monitoring unit comparing the calculated prediction distances between the satellites and the vessel, and pseudoranges between the satellites and the GNSS receiving unit at the second vessel position, and monitoring for the occurrence of errors at the satellites on the basis of the existence of an increase in errors at each of the satellites.

主权项

1. A system for detecting ambiguities in satellite signals for vessel positioning, comprising:
a Global Navigation Satellite System (GNSS) reception unit for acquiring a position of a vessel using a plurality of satellites; a vessel position calculation unit for calculating a second vessel position of the vessel after a specific time (t) has elapsed from a first vessel position of the vessel, using dead-reckoning; a distance calculation unit for calculating predicted distances between the respective satellites and the vessel, using position values of the respective satellites at the second vessel position, calculated using ephemeris information of the satellites, and a position value of the second vessel position; and an error monitoring unit for individually comparing the predicted distances between the respective satellites and the vessel calculated by the distance calculation unit, with pseudoranges between the respective satellites and the GNSS reception unit at the second vessel position, and then monitoring whether errors have occurred in the satellites depending on whether an error in each satellite has increased.