Theory and development of GPS integrity monitoring system
1996
This thesis discusses various aspects of the integrity monitoring of GPS applied to civil
aircraft navigation in different phases of flight. These flight phases include en route,
terminal, non-precision approach and precision approach. The thesis includes four
major topics: probability problem of GPS navigation service, risk analysis of aircraft
precision approach and landing, theoretical analysis of Receiver Autonomous Integrity
Monitoring (RAIM) techniques and RAIM availability, and GPS integrity monitoring
at a ground reference station. Particular attention is paid to the mathematical aspects of
the GPS integrity monitoring system.
The research has been built upon the stringent integrity requirements defined by civil
aviation community, and concentrates on the capability and performance
investigation of practical integrity monitoring systems with rigorous mathematical
and statistical concepts and approaches. Major contributions of this research are:
• Rigorous integrity and continuity risk analysis for aircraft precision
approach. Based on the joint probability density function of the affecting
components, the integrity and continuity risks of aircraft precision
approach with DGPS were computed. This advanced the conventional
method of allocating the risk probability.
• A theoretical study of RAIM test power. This is the first time a theoretical
study on RAIM test power based on the probability statistical theory has
been presented, resulting in a new set of RAIM criteria.
• Development of a GPS integrity monitoring and DGPS quality control
system based on GPS reference station. A prototype of GPS integrity
monitoring and DGPS correction prediction system has been developed
and tested, based on the A USN A V GPS base station on the roof of QUT
ITE Building.
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