中文摘要：

在重力辅助惯性导航的仿真计算中,重力异常是人们常采用的辅助数据,重力垂直梯度数据对惯性导航的辅助能力还没有涉及过。利用重力异常数据和重力垂直梯度数据,在同一个区域内进行了多条航线SITAN匹配算法的仿真计算,并对SITAN算法的初始定位结果和匹配辅助导航的结果进行了统计分析。结果表明,无论在初始定位能力上还是匹配辅助导航能力上,重力垂直梯度的数据结果要好于重力异常数据结果。

英文摘要：

Gravity anomaly data are commonly used in the gravity aided inertial navigation simulations.The study on the ability of the gravity gradient to aid an inertial navigation system,however,is lacking.Simulations of multiple routes in the same area with SITAN algorithm have been conducted based on the gravity anomaly and vertical gradient of gravity data.Statistical analysis indicates that the initial localization and matching aided navigation results are better from the vertical gradient of gravity data than those from the gravity anomaly data.