TECHNIQUES FOR USING A SERIES OF MAGNETIC MEASUREMENTS TO AIDE POSITION DETERMINATION

Techniques are provided for generating more accurate aiding data from magnetic anomaly measurements to aid in determining geographic position of a body. The following data is acquired: a series of more than one magnetic anomaly measurement (e.g., made with a magnetometer), a corresponding time of each magnetic anomaly measurement, and a vector distance between each successive magnetic anomaly measurement. With a single magnetic anomaly measurement, more than one geographic location on the magnetic anomaly map may be identified. As the number of magnetic anomaly measurements increases, a number of geographic locations diminishes eventually to a single geographic location on a magnetic anomaly map. Once determined, the single geographic location and a time is transmitted to a navigation filter.