Data reduction of underwater gravity measurement

As a new passive navigation technology,the gravity-aided underwater navigation has been the hotspot of research.But the main research is always focused on the matching arithmetic and system framework simulation,while the process and precision of gravity data acquisition is rarely discussed.In view of engineering utility,the paper analyzes the underwater gravity reduction technology in the gravity-aided navigation in detail,and it shows that the sea tide and sea surface topography(SST) are the two main effective factors.Considering of the complexity of sea tide and SST,a calculation idea of divided sea area is brought out.The results show that it is feasible and can be used for the underwater gravity reduction area.