Ramose RAIM: A Multiple-Failure DetectionAlgorithm Design for Civil Aviation
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Graphical Abstract
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Abstract
With the advent of Galileo and Chi-
nese Compass, GNSS navigation technologies will develop
rapidly. However, as the number of navigation satellites
in view will increase, the fault probability will rise. This
paper calculates the multi-fault risk of multi-constellation
satellite navigation system in terms of MOPS. It is high-
lighted that the probability of either one-fault or double-
faults is higher than integrity requirement. The paper also
describes a snap-shot ramose RAIM technology to protect
civil aviation users in multiple-fault case. In this condition,
a series of FDE calculation is adopted to separate satel-
lites in sight into several groups. Therefore the problem
will transform into several single-fault case, which current
RAIM can solve. Simulation results verify that this tech-
nique is proper to solve both single-fault and double-fault
problem of civil aviation caused by application of multi-
constellation GNSS.
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