RESULTS ANALYSIS OF VERTICAL GRADIENT OF GRAVITY ANDGRAVITY ANOMALY AIDED NAVIGATION WITH SITAN ALGORITHM
Xu Daxin 1) ;Wang Yong 1) ;Wang Hubiao 1) ;Cai xiaobo 1,2) ; and Dai Quanfa 3)
1)Key Laboratory of Dynamic Geodesy,Institute of Geodesy and Geophysics, CAS ,Wuhan 4300772)Graduate School,CAS,Beijing 1000493)Changsha University of Science and Technology,Changsha 41000
Abstract 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.
