Integrated navigation systems generally have the following three functions:
(1) Concord beyond function. The integrated navigation system can make full use of the navigation information of each subsystem to form the functions and precision that a single subsystem does not have.
(2) Complementary function. Since the integrated navigation system comprehensively utilizes the information of each subsystem, each subsystem can complement each other and expand the scope of use.
(3) Residual function. Each subsystem senses the same information source, making the measured values redundant and improving the reliability of the entire system.
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