Abstract
The seabed terrain navigation is an important part of underwater navigation system. With the aid of the seafloor topography, the underwater navigation system can greatly reduce the positioning error, and improve the navigation accuracy. However, the traditional TERCOM algorithm is not perfect, especially when the terrain entropy is relatively high. This paper will adopt the way of dynamic elevation sequence to avoid inaccurate positioning reasonably, at the same time it can improve the positioning performance of the algorithm.
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