New method for RAIM (receiver autonomous integrity monitoring) based on satellite selecting algorithm in multimode satellite navigation system
A navigation system and multi-mode satellite technology, applied in the field of global satellite navigation, can solve the problem of satellite increase
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[0081] The present invention will be further described in detail below in conjunction with accompanying drawings and examples.
[0082] Such as figure 1 As shown, the flow chart of the RAIM method based on the satellite selection algorithm in the multi-mode satellite navigation system implemented according to steps 1 to 7 of the content of the invention. In a certain observation epoch, the satellite coordinate information is extracted according to the navigation message, and the elevation and azimuth angles of all visible satellites are calculated according to the receiver position; in the multi-mode satellite navigation system, according to the time conversion factor in the navigation message, the final Determine the observation matrix containing only one clock error item, and calculate the optimal GDOP and satellite combination according to the number of satellites and formula (11); Weight matrix, and then perform RAIM availability detection; on the premise of ensuring that...
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