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Method to Improve Taxi Route Entry Using Display of ASRN Nodes

IP.com Disclosure Number: IPCOM000246695D
Publication Date: 2016-Jun-29
Document File: 5 page(s) / 364K

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ARINC Specification 816-2: OTHER [+2]

Abstract

Method for precision taxi route entry into airport non-movement areas using display of labeled ASRN node data. Airport mapping data has been created and refined in recent years primarily in response to the industry's desire to increase safety by reducing runway incursion and excursion incidents. As a result, flight deck applications have emerged such as electronic airport maps that render the mapping data with geo-referenced ownship displays that help pilots orient themselves during ground operations on the airport movement area used for taxiing, takeoff and landing. One specific feature of these mapping applications is the entry of taxi route information which is then displayed on the map, monitored and updated as the ownship progresses through the route, and used to alert the pilot if route deviations occur. Under certain circumstances taxi route entry could be difficult or ambiguous using airport mapping data in a conventional way. By selectively using existing airport mapping data that is typically not displayed on the map the taxi route entry can be made more intuitive.

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Introduction:

Airport mapping data has been created and refined in recent years primarily in response to the industry's desire to increase safety by reducing runway incursion and excursion incidents. As a result, flight deck applications have emerged such as electronic airport maps that render the mapping data with geo-referenced ownship displays that help pilots orient themselves during ground operations on the airport movement area used for taxiing, takeoff and landing. One specific feature of these mapping applications is the entry of taxi route information which is then displayed on the map, monitored and updated as the ownship progresses through the route, and used to alert the pilot if route deviations occur. Under certain circumstances taxi route entry could be difficult or ambiguous using airport mapping data in a conventional way. By selectively using existing airport mapping data that is typically not displayed on the map the taxi route entry can be made more intuitive.

Background

For pilot-entered taxi routes, runways and taxiways comprising the airport movement area are distinct and clearly marked using signage that follows international conventions. Electronic map symbols and labels are easily aligned with airport movement area signage, such that the translation of physical surface information to the map itself is unambiguous. However, signage and markings in non-movement areas (parking ramps and the approaches to passenger gate concourses) are often unclear or lacking, and navigating these areas can be less precise. Use of Airport Surface Routing Network (ASRN) data resident in the airport mapping database to display named non-movement area points on an electronic map can facilitate easy taxi route entry into or through non-movement areas.

Technical Discussion

ASRN Network Overview

The Airport Surface Routing Network (ASRN) is a graph of nodes and edges forming a network that represents possible routes on the surfaces of an airport. Nodes are placed on intersections or stopping points (runway thresholds, hold lines, parking stands, etc.) and edges represent valid paths connecting the nodes. Edges may be defined as straight lines or curves, typically to match painted guidance lines on the corresponding taxiway and runway surfaces. Rules for establishing an ASRN per airport surface feature for inclusion in the airport mapping database are captured in RTCA DO-272C [2].

The image below (Figure 1) shows an example of ASRN data overlaid on taxiway and runway features. Nodes are indicated by white dots with a red label. Edges are light yellow lines with a blue label. ASRN data is normally not displayed on the electronic map, but is used to facilitate the entry and display of a surface route to be followed by an aircraft or other airport vehicle.


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Figure 1: ASRN Nodes and Edges

In the image bel...