Mainly focuses on the precision of geomagnetic navigation system (GNS) which only used in map mode,develops the integrated scheme using INS/GNS,and presents a new matching mode.

• 针对此前地磁导航系统完全采用图匹配方式的精度问题,改进了惯性/地磁匹配组合方案,提出了一种新的匹配方法。