中文摘要：

以并行Kalman滤波匹配导航原理为基础,设计重力垂直梯度辅助惯性导航系统导航的可导航值计算方法。基于西太平洋海域2′×2′测高重力垂直梯度数据库,给出西太平洋海域重力垂直梯度辅助导航2′×2′导航格网值。选取不同特征区域的5条航线进行辅助导航仿真定位,并对导航能力进行统计分析,给出可导航性值、匹配成功概率、定位误差的关系。结果表明,本文设计的重力垂直梯度可导航性值可以作为匹配区域选择以及航线规划的数量性依据,可导航值大于14.0时,定位误差优于2.0nmile,并给出西太平洋海域对应的区域分布。

英文摘要：

On the basis of the parallel Kalman Filter maching navigation principle,an algorithm of navigation value for gravity vertical gradient aided inertial navigation system is proposed by using the least matching variance method.Combining the regional vertical gradient in the Western Pacific Ocean,the navigation value gridded in 2＇×2＇ in the area were determined.Through selecting five sailing courses in the different character region,simulation experiments were implemented and the statistic analysis for regional navigability was made.At last,the comparison and analysis of the navigability value,the matching rate and the positional error were given.The results show that the navigation value of the vertical gradient can achieve good performance in the selected matching area and planned sailing courses,and the positional error is less than 2.0 n mile if the navigability value is bigger than 14.0,moreover,the distribution of the corresponding area was shown.