Abstract
Position fixing, receiver autonomous fault detection, and receiver autonomous fault isolation are treated as system services, and the probability of outage for these three services is computed. The outage probability for the level of service required for nonprecision approach and enroute navigation in the National Airspace System is computed. The analysis assumes that GPS (Global Positioning System) is configured in the Optimal 21 constellation and includes the effects of satellite as well as Loran station failures. it is pointed out that user equipment which combines pseudoranges from GPS and Loran would be more reliable than an unaided GPS receiver or a Loran-only receiver. It could remove coverage outages caused by satellite failures and/or bad satellite geometry. Similarly, it could remove most of the coverage outages caused by Loran station shutdowns, high atmospheric noise levels, or precipitation static. A hybrid GPS/Loran receiver could also reliably provide self-contained fault detection and isolation (otherwise known as receiver autonomous integrity monitoring). >
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
