Key technique and development for geomagnetic navigation

As a passive autonomous navigation technique, geomagnetic navigation method has advantages of strong anti-jamming, low cost and moderate navigation accuracy. In this paper, the geomagnetic theory is introduced briefly, the research history of geomagnetic navigation is reviewed, and the navigation algorithms applied in geomagnetic navigation are summarized. This paper also points out the key technique and research trend in development of geomagnetic navigation. Finally, it forecasts development and application of the geomagnetic navigation in the future.