Required navigation performance

About: Required navigation performance is a research topic. Over the lifetime, 343 publications have been published within this topic receiving 3477 citations. The topic is also known as: RNP.

A new method for measuring energy intensity during commercial flight missions

Abstract: Today, air traffic contributes with about 2% of the global anthropogenic CO2 generation and constitutes one of the fastest growing transport sectors. With an increase in air transport of about5 % annually since the introduction of civil jet air transport in the early 1950ies, the aviation sector threatens to become a substantial and ever increasing contributor to Greenhouse Gas (GHG) emissions. The very stringent environmental goals introduced by ACARE in their vision for the year 2020 and accepted by, for instance, the European Commission in their “Clean Sky” project for Europe and the Air Traffic Management (ATM) modernization program SESAR of Europe strives for further improvements in energy efficiency. The SESAR activities are closely linked with introduction of new concept of operations. In parallel, airlines are actively working with fuel saving initiatives throughout the world, to minimize its environmental impact. At present there are no standardized tools for measuring and validation of improved energy efficiency and the generation of GHG (in particularly CO2). This is highlighted by the ICAO and seen as a highly prioritized objective. From 2012, the aviation industry is part of the Emission Trading Scheme (ETS) in Europe, where the annual emission of the airline is monitored. However, the monitoring of emissions required by the European ETS is on such a high level that it is not useful in the context of analyzing and validating specific segments of a flight mission or efficiency of different specific flight procedures. The challenge is to validate the increased efficiency associated with different improvements regarding modernization of the aviation industry. This study proposes a new method how to measure energy intensity during the latter part of flight missions, including the last cruise segment through the descent and approach until landing. A traditional concept of operation will be compared with new navigation technologies, for example, utilizing the latest satellite navigation concept by the usage of “curved approaches”, based on Required Navigation Performance Authorization Required (RNP AR) technology.

State of the art in airport navigation

Abstract: The general increase in air traffic and the complexity of modern airport layouts have conducted to think about new technologies to assist pilots during maneuvers on airport surface. Some airport navigation applications have been developed in recent years. The current technologies plot the estimated aircraft position on the airport map. In good visibility condition, this information helps the pilot to navigate on the airport. These applications contribute to the reduction of the taxiing time and runway incursions. Nevertheless, this information is not sufficient to navigate in low visibility condition. This paper introduces the state of the art in airport navigation, with the current functions available to assist pilots, and also the additional applications envisaged to improve the airport navigation in low visibility condition. Current constraints and limitations of airport navigation development are highlighted.

Determination of required positioning integrity parameters for design of vehicle safety applications

Abstract: Most connected vehicle safety and traffic applications depend on communication and position and velocity information to function. However, road users may have different vehicle communicating and positioning capabilities. Further, the performance of communicating and positioning could vary from time to time and location to location. It is important for the vehicle safety system to be fully aware of the performance of vehicle positioning outputs and warn the drivers when the positioning system cannot be used for intended level of safety applications. However, unlike aviation and Maritime navigation, minimum operational performance standards about positioning have not been established in the road community. In this work, we review and develop the required navigation performance parameters for vehicle positioning capability in terms of accuracy, integrity, timeliness and interrogability of positioning solutions. We attempt to adjust the integrity performance parameters for vehicle safety positioning and provide the analysis for integrity risk, protection level and different alert limits. Based on these discussions, we introduce the error ellipse representation to visualize the protection bubble area of each vehicle on the road. The results from a vehicle experiment demonstrate how well different levels of vehicle positioning capabilities meet the different integrity alarm limits. The results emphasize that the positioning system can inform the protection level achievable at any time instant and serve the safety application at that level accordingly.

Operational Receiver Autonomous Integrity Monitoring Prediction System for Air Traffic Management System

Abstract: The Global Positioning System (GPS) is the key enabling technology for new air traffic management (ATM) systems. However, for civil aviation safety-of-life applications, the sensors of an ATM system using GPS must meet the required navigation performance, especially integrity. According to a new ATM system requirement, the receiver autonomous integrity monitoring (RAIM) prediction system (RPS) is an essential element for predicting GPS service quality for a 72 h period. Many web-based RPSs have been developed and are operated by civil aviation organizations around the world. However, none can autonomously provide the GPS RAIM availability information to the new ATM system. Thus, this study develops an RPS that can be integrated with the new ATM system. Airport operators can obtain the forecast results directly from the ATM system for a specific flight-information region. The system integration is validated using three years of actual operation results of the new ATM system. An evaluation of its support fo...