Tactical differential GPS

US9423506B2 · kind B2 · utility

Assignee

• SAAB AB · SE

Inventors

• Per-Olof Persson · Cambridge, US
• Rolf Michel · Drensteinfurt, DE

Key dates

• Filing date: Sep 16, 2011
• Grant date: Aug 23, 2016
• Expiry date: Oct 13, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C21/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for improving an accuracy of a radio based navigation system by correcting the position given by the radio based navigation system with a correction vector derived from localization data stored in a map database. Position coordinates of the radio based navigation system are measured. A set of 3D map data is selected based upon the measured position coordinates of the radio based navigation system position coordinates. The actual position is determined from the selected 3D map data. The actual position data coordinates are retrieved from the 3D map data based upon the determined actual position. The correction vector is calculated from position difference between measured radio based navigation system position coordinates and retrieved actual position coordinates. The position given by the radio based navigation system is corrected with the correction vector.