Navigability analysis based on gravity map statistical characteristics

To analyze the relationship between referenced gravity map and location precision in gravity-aided navigation, this paper analyzes the characteristics of gravity map using the method of mathematics. According to the research on the navigability of different areas, we select the more suitable area for realizing high-precision navigation. The effect on the area's navigability of each statistical parameter have been discussed, and a overall characteristic parameter has been defined by calculating the weighted sum of all parameters. The overall characteristic parameter can be used for depicting the character of gravitational field and can be used as the basis of navigability analysis.