Geomagnetic matching location using correlative method

The geomagnetic matching technology was investigated,and a correlation matching algorithm was presented.The algorithm constitutes the referenced data sequence real-timely and adaptively,and adopts Hausdorff distance as correlative determining principle.The pre-matching and precise-matching were proposed to reduce the computing complexity and time.In pre-matching,the searching strategy defines a gridding unit as a step with SSDA method,so it can quickly eliminate non-matching area and gain feasible area for precise-matching.In addition,the dual-linear interpolation was introduced for further matching.Simulation experiment confirms that the correlation matching algorithm is applicable for geomagnetic navigation in certain condition.