The current century is the era of rapid development of information technology, and status of integrated navigation which depends on the development of information technology will further accelerate significant, which leads to more and more requirement in comprehensive application of integrated navigation .The performance of tracking loop will downgrade in platform with high-dynamic, which will reduce accuracy of navigation even brings intense error. Loose coupling and tight coupling will demonstrate error accumulate and heavy calculation respectively in high-dynamic, in the paper we introduce ultra-tight integration feature, and demonstrate model and calculate process in high-dynamic. We will demonstrate several models of ultra-tight integrated with problem in high-dynamic.
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