Patent ID: 6961657
Filing Date: 2005-11-01
Classification: G01C

Abstract:
1. A method for determining a submarine geographic position, the method comprising the steps of: a) launching a radio navigation-enabled buoy and recording a launch time and a DRNS geographic position estimate of said buoy, wherein said DRNS geographic position estimate is determined by a DRNS; b) recording a buoy breach time and searching for radio navigation signals of said buoy, wherein said buoy breach time is subsequent to said launch time; c) recording a radio navigation position acquisition time and an initial radio navigation position of said buoy, wherein said acquisition time is subsequent to said buoy breach time; d) recording a subsequent radio navigation position of said buoy and a subsequent time, wherein said subsequent time is subsequent to said radio navigation position acquisition time; e) determining a DRNS correction factor using a DRNS position error, a buoy drift, the recorded radio navigation positions of said buoy and DRNS position data of said buoy; f) estimating said submarine geographic position using said DRNS correction factor and said DRNS geographic position estimate.