中文摘要：

潜艇的惯性导航误差随时间积累.为了实现潜艇的无源导航,可利用地磁场强度异常数据进行辅助导航以修正纯惯性导航的误差.根据全球EMAG2构造西太平洋海域2′×2′总地磁场强度异常格网数据作为基准信息,结合SITAN地磁匹配算法在该海域进行地磁导航仿真计算.仿真结果表明在地磁总强度异常变化较大的区域,地磁辅助潜艇导航精度达到2′左右,与EMAG2的分辨率相当,验证了采用地磁场辅助潜艇导航的可行性.

英文摘要：

The navigation error of INS in submarine is accumulated with time. In order to achieve passive navigation, total anomaly grid data of geomagnetic intensity can be usecl to correct the drifting error of the gyro in INS. A total geomagnetic anomaly grid with the resolution of 2 arc-minute cover western Pacific Ocean was extracted from Earth Magnetic Anomaly Grid （EMAG2）. In this area simulate method based on SITAN was carried out to test geomagnetic aided navigations method＇s feasibility. The simulation result shows that the navigation precision attain 2 n mile, about the same resolution of EMAG2, in large geomagnetic intensity diversity region, which affirms the possibility of geomagnetic aided submarine navigation.