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根据卫星测高反演的重力异常和全球地磁异常格网,构造了西太平洋海域2′×2′重力异常和磁场异常数据作为基准信息,结合SITAN滤波算法在该海域上的两块特征区域上,对比了重力和地磁辅助导航的效果。仿真结果表明,重力和地磁辅助导航的结果与潜艇航线上的重力和磁力信息丰富程度密切相关,两块区域上的两种辅助导航算法的精度都在2nmile左右。
According to the gravity anomalies retrieved from satellite altimetry and the global geomagnetic anomaly grids, 2 ’× 2’ gravity anomaly and magnetic field anomaly data are constructed as the reference information in the western Pacific Ocean. Combined with the SITAN filtering algorithm, two feature regions on this sea area , Compared the effect of gravity and geomagnetic assist navigation. The simulation results show that the results of gravity and geomagnetic assistant navigation are closely related to the richness of gravity and magnetic information in the submarine route. The accuracy of two kinds of assistant navigation algorithms in two regions are both around 2nmile.