1results about How to "Fast matching" patented technology

The application provides a gravity anomaly underwater continuation method and device based on an upright hexahedron section, a track gravity anomaly of a submarine is read by a boat-borne gravimeter; an upward continuation calculation surface elevation is obtained, the track gravity anomaly is upwardly continued to the calculation surface to obtain a continuation gravity anomaly; a seawater gravity anomaly is calculated by constructing an upright hexahedron model; an upward continuation gravity correction value is calculated according to the continuation gravity anomaly and the seawater gravity anomaly; a standard deviation of a difference value between a sea surface gravity anomaly and the upward continuation gravity correction value is calculated; if the standard deviation is less than or equal to a continuation threshold value, the upward continuation gravity correction value is determined as the continuation gravity value; real-time coordinates of the submarine are obtained according to the track gravity anomaly and the continuation gravity value. The track gravity anomaly and the sea surface gravity anomaly are matched on the same observation surface, the positioning accuracy of gravity matching navigation is enhanced, the continuation result is more accurate, and the matching speed is faster.