| Summary: | 碩士 === 國立臺灣大學 === 電機工程學系 === 85 === A revolution of navigation technology has been taken place
due to GPS (Global Positioning System). Its impact to air
navigation is obvious. In the future, most of the existed air
navigation systems may be replaced by GPS based systems.
Integrity is required for airborne GPS receivers. In this
thesis, we integrate a RAIM(Receiver Autonomous Integrity
Monitoring) monitor into a Plessy''s GPS Builder-2 development
kit to satisfy the mentioned requirement.
The failed GPS satellite will be detected by its abnormal
pseudorange. The principle of RAIM is based on redundant
information, hence the number of GPS satellites must be greater
than 4. In this paper, the RAIM monitor contains two
parts. In the first part, the ARP(Approximate Radial-error
Protected) method is used to test if the satellite geometry is
admissible. In the second part, the LSR(Least Squares Residuals)
method is used to test the failed satellites existing or not.
In this thesis, the off-line test to verifythe RAIM monitor
performance is simulated by software first. Then the task of
RAIM is integrated into the software of GPS Builder-2.
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