Research on Geomagnetic Matching Method

Geomagnetism aided navigation (GAN) is a new branch of the integrated navigation technique. The navigation principle and the development of the GAN system are introduced in the paper and the emphasis is laid on the research of the matching method. Geomagnetic matching is the technique that uses a magnetic map to determine the location and the obtained position information can be used to limit error accumulation of the inertia! navigation system (INS). An improved correlation matching method based on the contour constraint is proposed in the paper. Simulation results show that the proposed method can greatly improve the performance of the whole GAN system.