Showing papers on "Performance-based navigation published in 1989"
1 Nov 1989
TL;DR: Analysis results indicate that an enhanced GPS system can meet US Federal Aviation Administration enroute/terminal area navigation and nonprecision approach requirements under conditions which include accuracy degradation due to worst-case satellite failure, selective availability, and signal integrity.
Abstract: The future applicability of the Global Positioning System (GPS) to the National Airspace System (NAS) for user navigation and landing support is discussed. Functional characteristics and performance estimates are presented for several GPS enhancements, including the use of a geostationary satellite L-band repeater, a CONUS calibration network, and pseudolites. Analysis results indicate that an enhanced GPS system can meet US Federal Aviation Administration (FAA) enroute/terminal area navigation and nonprecision approach requirements under conditions which include accuracy degradation due to worst-case satellite failure, selective availability, and signal integrity. Similarly, it is shown that a Category I precision approach and landing requirement is essentially met using two pseudolites per airport. Additional analysis and extensive testing are required to validate the Category I findings. >
35 citations
4 Jul 1989
TL;DR: This lecture will describe the application of Kalman filter design to optimally and synergistically combine the diverse types of navigation sensor information.
Abstract: : Startling advances in electronics and computer technologies over the last two decades have significantly altered the scope of military operations, weapon systems and some of the required supporting services. The increased range, speed and accuracy of modern weapon systems impose stringent accuracy and reliability requirements upon the navigation system of military platforms. Over the last few years, DREO has been involved in the development of a microprocessor-based Marine Integrated Navigation System (MINS). The present version of the MINS can work with a variety of types and brands of navigation sensors such as Omega, Transit, GPS, Loran C, speedlog and gyrocompass as well as operator-entered position or sextant measurements. It has been successfully tested on both Canadian and US navy vessels and it is due to be installed on almost all of Her Majesty's Canadian ships in 1988. This lecture will describe the application of Kalman filter design to optimally and synergistically combine the diverse types of navigation sensor information. Technical problems, design objectives and some design features unique to this application are highlighted. Results of sea trial evaluations are compared to simulation results. Integrated system design guidelines and road maps derived from the Canadian experience are also presented.
6 citations
7 Jun 1989
TL;DR: The authors believe that navigation systems with greater position determination precision are necessary in these types of systems, and have developed a VNS (Vehicle Navigation System).
Abstract: There has been a growing trend toward incorporation of various types of communications function within navigation systems to create systems which provide greater functionability as compared to navigation systems which provide route-guidance functions alone. The authors, believing that navigation systems with greater position determination precision are necessary in these types of systems, have developed a VNS (Vehicle Navigation System). In this paper they discuss this VNS system, as well as applications for various VNS systems. >
6 citations
TL;DR: In this article, the preliminary entry guidance analysis is carried out and the design constraints for HOPE are clarified, and the tentative navigation reference configuration for each flight phase is obtained based on the navigation analysis.
TL;DR: A major project has been carried out in Japan to develop an "intelligent" ship that is highly automated and that employs artificial intelligence in its onboard systems.