摘要
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。
Inertial navigation system（INS） is the primary navigation methods for submarine.In order to attain passive navigation,in this paper gravity anomaly and geomagnetic intensity anomaly grid data are used to correct the drifting error of the INS.The gravity anomaly grid data is derived from satellite altimetry inversion.The geomagnetic anomaly grid data is extracted from Earth Magnetic Anomaly（EMAG2）.The two grid data are both with the resolution of 2 arc-minute.In western Pacific Ocean two special regions with distinct gravity and geomagnetic features are selected to carry out the simulation test on gravity and geomagnetic aided navigation with SITAN algorithm separately.The simulation result indicates that there is a close relationship between the gravity and geomagnetic feature along the trajectory and the result of aided navigation.The navigation precision attain 2 n mile under various circumstances.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2012年第10期1198-1202,共5页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41021003
41074051)
国家自然科学基金青年科学基金资助项目(41104050)
